Get Hired with One of The Best Java Training Institute In Pune

“Get Hired, Not Just Certified”

If not anything else, you must have at least heard the word Java. No wonder it does not require any separate introduction.

Still, for those who are new to the field of computers or are totally unaware, here are some key points about Java programming language.

James Gosling is known to be the creator of Java. He developed the language at Sun Microsystems. Some major characteristics of Java are- it is object oriented, class-based and concurrent. It is known to have very few execution dependencies that make it the first choice for a variety of applications all over the world. Not to tell differently that it is amongst the most widely used programming languages.

What developers’ like the most is the fact that it has the principle of write once, run anywhere. This means that a Java code post compilation can run on all platforms. No need to recompile time and again.

The sole intention behind this was to make you acquainted with the world of Java before you go for a Java class in Pune for further training.

Thus, Core Java training would be your initial step before you move on to the next level. What better place than CRB Tech for Core Java training in Pune?

About CRB Tech Java Training :-

Java training course in Pune will help clear your Java related concepts and thus make you an expertise in Java development. CRB Tech stands amongst the best institute for Java in Pune. This is evident from the fact that we have provided 100% placements to our candidates and speaks for the quality of training we provide.

Therefore, if you are looking for best Java classes in Pune, for your Java coaching, then CRB Tech has to be your first choice. It happens to be the best Java training institutes in Pune.

Why CRB Tech Java Training is best?? Here is Ans:-

CRB Tech’s Java developer course in Pune has a number of highlights that make it stand out from its peer courses conducted at other Java training institutes in Pune. These are as follows:

1. 100% job guarantee:

We practice such high standards in our training and placement activities, that we provide a 100% job guarantee on a legal stamp paper. We boast of it!!! Very few Java training institutes are known to do the same.

2.Placement Records :

Many of our candidates have got placed in renowned companies like Capgemini, Amdocs, Mindgate, Vyomlabs etc. A total of almost 400+ of our students have been placed in this year.

See our students Reviews here:CRB Tech Students Speak

3.LOI (Letter of intent):

We at CRB Tech provide LOI or you can call it a company offer letter at the start of the training itself. So, you have a job at hand right then.

4.Placement clients:

Our association with a number of placement clients provides you with a sea of opportunities while getting your dream job.

5.German language coaching:

German language skill set will help you while getting a job abroad in a country like Germany.

6.Interview calls:

Students undergoing Java language training start getting interview calls from the first month of enrollment itself. Till he or she is placed, calls continue to pour in with no restriction on their numbers.

So, if you are dreaming for such dream companies, you ought to Enroll today for Java Training


Our corporate like infrastructure is one aspect that takes us into the list of one of the best Java training institutes in Pune. Our aim behind providing such an infrastructure is that our students should get a feel of the corporate world, right from their training days.

 8.Focus on industry oriented training:

At CRB Tech, we teach you the skills that are required by the industry. Due to this, it becomes easier for the candidates to adapt to the real time work they do at their jobs. Practical application of the knowledge becomes easier. As our students pass out, they become industry ready.

9.Emphasis on technical knowledge:

As Java is a programming language, having good conceptual knowledge of coding is utmost necessary. Therefore, special attention is given on this, and students are given a lot of programming assignments during their Java classes in Pune. This helps them turn into expert coders.

10.Guidance from industry expert mentors:

At CRB Tech, the best Java institute in Pune, we have on board experts from the industry, that share their knowledge and experience with the students. They also give valuable tips that help to crack interviews.

11.Soft skill training:

Most of the times, this becomes a weak link for the students. Good English communication is necessary when you enter the corporate world. Therefore, soft skill training is given to the students to boost their confidence. Many of our students have benefited from this.

12.Aptitude training and mock interviews:

Aptitude preparation is a part of the training program and it helps the job seeker to crack the hardest of the aptitude tests, when they go for Java jobs in Pune. Mock interviews are also conducted, which give them important tips for cracking the company interviews.


We provide the interested candidates assistance, for their Java Sun certification exam.These were a few highlights of our Java training Pune.

Eligibility criteria for our Java course:

A career in Java programming is promising, and anybody can learn Java as long as:

Any candidate who owns a degree in the field of computer science or at the end of the day, B.E/B.Tech or B. Sc Computers and even masters degree owners are preferred and recommended for this course.

Duration and Financial assistance:

The duration of the training and placement program at our Java developer institute in Pune is of

4 months. The Java classes in Pune run for 7-8 hours on weekdays.

Talking about the financial options:
  • Loan options:

Loan and installment options are made available for payments of fees.

  • Credit Card:

Students can opt the option of EMI payment on their credit cards.

  • Cash payment:

Fees can also be paid in easy cash options.

We Design Special Corporate syllabus for Students:

Lets go through the Java course syllabus over here. It will give you a feel of what all is covered as a part of the Java training class. The syllabus is designed extensively beginning from the basics and gradually progressing towards the more advanced topics.

The module-wise structure and breakup of the Java programming course in Pune conducted by us,

is mentioned below:

Introduction To OOPS:

  • Need of Object Oriented Approach

  • Understanding Object Oriented Approach

  • Understanding Objects

  • Object Characteristics

  • Object Model

  • Major Pillars And Minor Pillars

  • Group Discussion

Introduction To Java And SDE:

  • Introduction To Java Programing Language

  • Java History

  • Java Features

  • Hello world Program

  • Introduction To Eclipse

  • Simple POJO & this Keyword

  • Group Discussion

Language Fundamentals:

  • Java Literals, Keywords, Identifiers

  • Java Datatypes

  • Type Casting

  • Operators

  • Flow Control Structures

  • Looping Control Structures

  • Scanner Class

  • Arrays

  • Foreach Loop

  • Group Discussion

Introduction To Classes And Objects:

  • Classes, Objects And Instance Variables

  • Constructors

  • Object Instantiation And Reference Variables

  • Static Variables And Methods

  • Anonymous Block, Static Block

  • Group Discussion


  • Inheriting A Class

  • Super Keyword

  • IS-A ,HAS-A Relationship(Containment)

  • Object/Reference Casting

  • Object Class

  • Static And Anonymous Inner Class

  • Group Discussion


  • Method Overloading

  • Method Overriding

  • Method Hiding

  • Abstract Method

  • Abstract Classes

  • Final Keyword

  • Group Discussion

Garbage collection:

  • Understanding Garbage Collection

  • Finalize Method


  • Inheritance And Diamond Problem

  • Need For The Interface

  • Understanding Interfaces

  • Extends And Implements

  • Abstract Class Vs Interface

  • Instance Of Operator

  • Group Discussion


  • Creating Packages

  • Using Multiple Packages

  • Java Packaging Structure

  • Access Specifiers

  • Static Import

  • Group Discussion


  • Understanding Reflection

  • Using Reflection

  • Important Classes In java.lang.reflect


  • String Class

  • Interned Strings

  • String class Vs Interned String

  • String Constructors And Methods

  • StringBufffer Class

  • StringBuffer Constructors And Method

  • String Vs StringBuffer

  • StringBuilder Class

  • Group Discussion


  • Understanding Exceptions

  • Exception Hierarchy

  • Handling Exceptions

  • Blocks And Clauses

  • Throw And Throws Keywords

  • Checked And Unchecked Exceptions

  • Custom Exception

  • Group Discussion

Wrapper classes:

  • Need Of Wrapper Classes

  • Wrapper Classes For Primitives

  • Wrapper Classes Hierarchy

  • Wrapping And Unwrapping

  • Strings And Wrapper Classes

  • Autoboxing And Unboxing


  • Introduction To Collection Framework

  • What Is Framework

  • Collection API

  • Generic Collections

  • ArrayList Class

  • LinkedList Class

  • Group Discussion

  • HashSet,LinkedHashset,TreeSet

  • HasMap,LinkedHashmap, TreeMap

  • Usage Scenarios

  • Hashcode and equals method

  • Comparable And Comparator Interfaces

  • Legacy Collections

  • Some Other Important Classes(Date,Arrays,Collections,etc)

  • Group Discussion

GUI and Swing Basics:

  • Introduction to AWT

  • Introduction to Swing

  • Difference between AWT and Swing

  • Event

  • Handling Events

  • Listener interface and adaptor classes

  • Group Discussion


  • Process,Thread, Context Switching

  • Multiprocessing Vs Multi threading

  • Program As An Single Thread

  • Creating Thread By Extending Thread Class

  • Implementing Runnable Interface

  • Group Discussion

  • Thread States

  • Synchronization

  • Inter thread Communication

  • Demon Thread

  • Thread Group

  • Group Discussion

File I/O:

  • Understanding Stream And It’s Advantages

  • IO Hierarchy

  • Input Stream And Output Stream Classes

  • Filter Streams

  • Buffered Streams And Data Streams

  • Readers Hierarchy

  • Serialization

  • Some Other Important Classes(File)

  • Group Discussion


  • Undersanding JDBC

  • JDBC Drivers


  • JDBC Type 1

  • JDBC Type 4

  • Prepared Statement

  • Callable Statement

  • Working with multiple databases

  • Batch Updates

  • ResultSet and Database Metadata

  • Group Discussion


  • Annotations Overview

  • Built In Annotations

  • Custom Annotations

  • Group Discussion

Java Updates:

  • Enum With Methods (Jdk 1.5)

  • Navigable Maps And Navigable Sets (Jdk 1.6)

  • Varargs (Jdk 1.5)

  • JDBC 4.0 features (Jdk 1.6)

  • String in switch (Jdk 1.7)

  • Multiple exception handling, Try with resource (Jdk 1.7)

  • Lambda expression (Jdk 1.8)

  • Pipelining and Streams(Jdk 1.8)

  • Date and Time API(Jdk 1.8)

  • Default method(Jdk 1.8)

  • Group Discussion

What are you waiting for? Book your seats in one of the best Java courses in Pune, now !

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6 Points That Prove The Importance Of String In Java

Sun Microsystems developed and released Java, a programming language in the year 1995. There are lots of application and websites that we use or see are developed using Java language.

Significance of string in Java Programming Language

Most of the Java programmers use String very frequently and they are very crucial in Java. It is significant that a good knowledge of String class is necessary for Java developers so that they can use them effectively. Here are few significant topics about Java String:

1. No null character used for termination.

There is no need for using a null character by String for the purpose of termination. On the other hand, objects and strings are supported by character array. For representing a string in a language programmers can use a character array. This can be done using toCharArray() method of java.lang.String class of JDK.

2 Strings are not changeable

Most of the Java programmers must be aware of the fact that Strings cannot be modified and it means once the string is created by the programmer it cannot be changed. Still, if the programmer persists to change the content of the string it will lead to the creation of a new string. On the other words, there is no permission granted for adding new content into the existing string and even the functionality of a string cannot be overridden.

Do you know the Concept of Java String?

3. String Pool contains the strings

There is a separate string pool in the strings and inside the Java memory, the string pool is a special memory located. With the help of String literal if the string object is created by the programmer the string pool is not checked by the JVM for creating an object using the new operator.

4. Comparison of Strings is done using equals method

Equality method is not used for comparison of two strings rather equals() method is used by the String class. The content equality is offered by the string class as it overrides the equals method which basically has characters, order, and case, in use.

5. Retrieving part of String in Java

Substring() is used for retrieving only a portion of String in Java by the Java programmers. Start and end index is specified by the programmers and it returns character from the specified range. With the help of character arrays substring(), methods are also backed and it is also used by an original string.

Difference Between StringBuilder And StringBuffer In Java

6. Strings Assists Operator Overloading

Although operator overloading concept is not assisted by Java programming language most of the special programmers can use the operator overloading method. For combining two strings + operator can be used by the Java programmers. For converting char, int, long or double to convert char, int, long or double to transform into String by simply combining with an empty string “”.


In Java, strings are quite important and the content inside the string cannot be overridden or changed after creation. There are various other functionalities supported by strings and they can be used by programmers according to their project need.

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Explain Java JVM Run Time Data Areas

It is very important to understand Java programming but for that Java Virtual Machine, runtime data areas are needed to understand as a prerequisite. OutOfMemoryError is one of the most dreaded errors in Java and is associated with Java Virtual Machine (JVM) memory areas. JVM internals is also very important to know along with the working of a data area and with the help of this we can track the JVM errors.

1) Program Counter (PC) Register :

The program counter (PC) helps in recording the current instruction execution at any moment. In a sequence of instructions in a program, it is called as a pointer to the current instruction. It is the same in Java JVM terms. As Java assists multithreading, the architecture is multithreaded and thus when a thread is created a program counter is created. The current statement executed in the thread is executed by the PC counter.

Ream More :  Multithreading in Java

2) Java Virtual Machine Stacks :

For storing Java virtual machine frames, Java stacks are used. The stacks do not have any changes done by JVM and they are just storage units for frames. There are two types of stack memory they are a varying size and fixed size. With respect to the requirement, varying size can expand dynamically. When a method is invoked, JVM frames are created and dynamic linking is performed.

Varying size can dynamically expand as per the need. Java JVM frames are created when a method is invoked and it performs the dynamic linking.

3. Heap Memory :

For storing objects of arrays and classes, heap data area is used. Across multiple threads, heap memory is common and shared. Garbage collector comes to the rescue over here. At VM startup heap data area is created. This helps in claiming the memory back by the garbage collector. It is regarded as the best feature of Java.

Read More :  Garbage Collectors In Java and It’s Types

4. Method Area :

There is a logical part of heap area called method area but JVM implementers decide about it. There are per class structures and fields in the method class. It consists of method data, method and constructor code, run-time constant pool. At JVM startup, a method is created and shared among other threads. If the memory space is not enough during the run-time then JVM will throw OutofMemoryError.

5. Run-time Constant Pool :

Outside of the method area, a run-time constant pool is created and it is done by JVM when an interface or class is created. The constant pool table has the Run-time constant pool which is the best suited for a single class or interface. If the JVM cannot find the memory for run-time constant pool allocation it will throw OutOfMemoryError.

Read More :  Understanding JVM Internal

6. Native Method Stacks :

There are native method stacks available in the native methods supported by JVM. If JVM cannot be loaded with the help of native methods then there is no need of native method stacks. Similar to general JVM stacks, memory size is managed. StackOverflowError is thrown by JVM or OutofMemoryError will be popped up respectively.

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Explain Java NIO BUFFER

For writing to a channel or reading from a channel, buffer is regarded as a block of data. For holding the data and acting as a destination point in an NIO channel, this object is used. For accessing data and tracking the read and write processes there is a formal mechanism offered by buffer. The only major difference between old Java I/O and NIO is buffer. Earlier versions had direct reading of data from s tream or written into it but now buffer is used for reading or writing it.

NIO Buffer Characteristics

  • The basic building blocks of Java NIO is buffer

  • For reading and writing data buffer offers a fixed size container.

  • Most of the buffers are readable but only few buffers are writable.

  • The final destination of channels are buffers.

  • Buffer content is not quite mutable in read-only format but its position, mark, and limit are mutable.

  • They are not thread-safe.

Difference Between StringBuilder And StringBuffer In Java

Buffer Types

For every primitive type there is a buffer type and all the buffer classes apply the Buffer interface. Here are few buffer types available in Java NIO package:

  • ByteBuffer

  • CharBuffer

  • ShortBuffer

  • IntBuffer

  • LongBuffer

  • FloatBuffer

  • DoubleBuffer

  • MappedByteBuffer

Buffer Capacity

You can store only a limited amount of data in Buffer as it is a fixed size type. The capacity of the buffer is defined by the maximum fixed size. Before writing into the buffer it should be check whether it is full and if it is full it should be cleared. The capacity can be set only for once and it cannot be changed ever.

Buffer Limit

The capacity of the buffer is equal to the limit especially on the write mode. The limit in the read mode is one previous to the last filled index. While writing the buffer, the limit is incrementing.

0 <= limit <= capacity.

Buffer Position

Current location in buffer is identified by the position of the buffer. At the time of buffer creation, zero is the position. The position is incremented to the next index on write or read.

Best Tips For Safe java Programming

Buffer Mark

Bookmark and Mark are similar for setting the position of a buffer. Current position is recorded when mark() is called and marked position is restored when reset() is called.

Buffer flip, clear and rewind

Buffer flip()

To make a buffer flip () method is used especially for get operations and a new sequence of write is made ready. The limit is set to the current position and then to zero by by the flip () method.

Buffer clear()

To make a buffer for put operation and clearing the space to be available for new sequence to read Clear() method is used. The limit is set by the clear method and position to zero.

Buffer rewind()

The data that is existing is read again by the rewind() method and the rewind() method is used for setting the buffer position to zero.

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10 Tips To Become A Better Programmer

To be a better programmer you must be better at algorithms, designing using OOPS, data structure, multi-threading and lots of other programming concepts eg: divide and conquer, recursion, prototyping, and unit testing. You can find a mixture of lots of skills in programming and it means it is not practical to learn it in quick time, but it takes lots of time to get it with experience but is not a one night process.

It is possible to be a Java programmer with 5 years of work experience but without being a proficient professional. Most of the candidates are targeting on Java theory for an interview instead of programming and coding skills. Here are few things to help you become a successful Java programmer.

1) Coding, coding, and coding :

It is very tough and the main thing of programming. With the help of coding, you can get to know the errors and handle it well and focus on improving them. It is not possible to just focus on designing as coding is very much important to produce output. Just don’t quit after solving the problem because they keep coming again and again.

Read More :  Best Tips For Safe java Programming

2) Go through the books :

As said coding is quite difficult and both good code and the bad code has a major difference but how are you aware of it? It is not possible to understand the difference until you have come across a good code and understand why a code is particularly good. Here is where books come into the picture.

3) Explore Open Source :

With respect to Google, Apache and other projects just participate in the open source code to develop your skills in programming and become a very good programmer. All you need to do is register on their mail list. Rest will be sorted out because you will dwell in the discussion between good programmers and therefore you will be able to understand problem and approach to develop the skills in you.

4) Work more on Algorithms, data structure, and design related problems :

This is very much important to become a very good programmer. You can find lots of programmers are expert in algorithms, data structures, and basics. For any program the key basis is a data structure, learning more about them helps in problem-solving.

Read More :  Why Is Java Considered A Secured Language?

5) Get connected with good blogs “

It is similar to reading books and yes it does helps you. Most of the programmers generate such blogs and they give away their personal opinion. It is very easy to understand. They also help you in knowing new features, technology, and API.

6) Reading Code :

It is not just about reading blogs but you need to read codes too. As said earlier reading blog is easy but going through code is quite tough. Just keep viewing various codes different programmers in the forum. Develop your skill, and understand the concept and at first, it will be very difficult to bug the program and understand the code but practice will make you perfect.

7) Writing Unit Test :

Coding process can be understood and groomed with the help of unit test and finally, it will help you to design better. Most of the thing which is tough enough to test but has a great chance of improvement. You can find better abstraction, names, interface, and abstract class design with the help of writing unit test. For average programmers unit test is a tough task but then this is the only way to develop your skills.

8) Review your code :

This method is also very important to become a good solid programmer after unit testing. This helps in two ways for both the author and the reviewer to enhance his code sense and gives advice while author gets to know from his mistake. Code review helps in identifying your mistakes and gain experience in becoming a good programmer.

Read More :  Introduction To Robotics : Programming A Robot Using Java!

9) Converse with the fellow programmer :

With respect to talking, reading is very much low energy event. It is always good to connect with a fellow programmer and talking and hearing will help you more when compared to just reading. Most of the programmers indulge in talking with the fellow programmers to groom their skills.

10) Be a part of forums and commenting the blogs :

For updating your skill this activity is very much important. With the help of sharing knowledge the first person who gets the advantage is the one who is open and active. It is a vast field which left unused will make you forget important things. Sharing is the best way to improve your knowledge.

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Why Java Doesn’t Support Multiple Inheritance

The main point to be discussed over here is Java does not support multiple inheritance or Java does support? There are lots of people who are still under confusion that it supports but actually it does not support using interface in Java. Even the father of Java has once admitted the fact.

Most of the developers actually projected a false story about the support of multiple inheritance. When compared to concrete classes interface gives flexibility and using single class multiple interfaces can be implemented.

With the help of this you actually get closer to multiple inheritance. The main thing actually done is implementing multiple interfaces and that is not to be done in terms of extending anything or inheriting anything. For including the behaviors and properties of implementing the class there is no free seeking of implementation from parent classes.

Read Also:-Significance Of Abstract Methods and Classes In Java

Multiple Inheritance

The properties and behavior of multiple class to a single is inherited in the Multiple Inheritance. There are some programming languages which are famous in supporting multiple inheritances like Common Lisp, C++ etc.

Lack of multiple inheritance in Java

It is quite clear to us that there is no back up for multiple inheritance in Java. But why? The Java creators took this design decision. There is a very rare usage of keyword and it is quite simple. Though there is a solution for this problem in C++ you will get into a trap.There is no multiple inheritance in Java and therefore no problem. Suppose if there are two classes having the same method there will be only one method in the implementing class and that too will be done by the implementer. Multiple Inheritance is made difficult with the help of dynamic loading of classes.

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Do You Know What Is JSON And Why It Is Used?

JSON is the abbreviation for ‘JavaScript Object Notation’ which is designed to exchange data as a standard format. It is a simple text-based and lightweight data standard, which is intended for the human-readable data exchange.In this tutorial, it is expected that the JSON’s novices possess an elementary knowledge of how the web applications work over the HTTP protocol along with the knowledge of JavaScript.

JavaScript Object Notation is the full form of JSON and it is meant for standard exchange of data. It is quite a simple text-based and nonheavy data standard which is meant for the legibility of human data exchange. A basic knowledge is possessed by JSON novices and that is what is expected in this tutorial. We will focus on theJSON novices elementary knowledge on the working of web applications over the HTTP protocol including the knowledge of JavaScript.

Read Also:- 4 Different Features of Javascript

Things to note for JSON

  • JSON’s abbreviation is JavaScript Object Notation

  • Douglas Crockford stated the JSON format

  • .json is the extension filename for JSON

  • Application/JSON is the internet media type for JSON

  • Easily readable by human

  • Public.json is the Uniform Type Identifier

Applications of JSON data format

  • For browser extensions and websites, JSON data format is widely used in the programming language written by JavaScript language.

  • For transmitting the data that is structured between a client and server in the web applications JSON data format is used.

  • In the process of serialization and transmission, JSON data format is frequently used for the structured data over the network.

  • In the programming of Web Services and APIs, JSON data format is used for providing public data.

  • JSON data format is used for offering public data in the programming of web services.

  • The scope of use is widening because of the language-independent data format with other programming languages.

Read More:- Uses and applications of JavaScript

Characteristics of JSON data format

  • It is very easy to read and write

  • It is not very heavy and is text based

  • There is language independence in JSON format and it can use with lots of programming languages like JavaScript, PHP, PERL, Java/J2EE, Python, C, C++, etc.

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Best Tips For Safe java Programming

It is high time that you should know about the security threats in technology that are increasing around the world drastically. Earlier it was considered to be single credit card numbers which were stolen and but currently, you can find another story of where you can find lots of financial records revealed like the Experian discovery. It is not an easy to task to write a code and therefore for providing bulletproof code which is approximate most of the auditors, engineers, architects, and managers know that there are lots of things that could go wrong with the code. It is not possible to prevent or predict beforehand but it is possible to reduce the risk.

Here are few tips for offering a highly secure code.

1) Testing Inputs Rigorously:

For getting into your machine the path that attackers choose are the simplest routes while the code opens. If this program of yours has been linked to the internet then there is a possibility that someone will look into your codes or access it as it opens. An instance for a vulnerable path into software is nothing but an overflow of the buffer developed by inefficient C programmers who will allow the character string till it reaches zero. Earlier the data packets were logged arbitrarily as the attackers discovered and wrote the programming stack and memory till the terminating zero is never sent.

Read More :  Java Programming Language and It’s Security Level

2) Store only what is required :

If you want to email someone then it is just better to store the email address and nothing more to avoid unnecessary storage. Disk space, processing time are all costed if you store extra information thereby making space for the hackers to target. Most of the programmers are habituated to store unnecessary data thereby leaving a trail of data for anyone to find. Try to make it simple.

3) Just don’t rely on passwords :

Acceptance of simple passwords by some of the programs are quite dangerous and it also adds fuel to the fire. N-factor authentication is the solution for implementing it and it tosses various distinct hurdles in the user’s way when they log in. If you send a text message from a random number and asking them to provide number along with passwords is an example. If the user is not having any mobile coverage or the battery is dead then this is the best solution to provide.

Read More :  Why Do Most People Prefer Career In Java Programming ?

4) Requirements Negotiation :

If project requirements are considered by the developers and they must think about the need to realize the value of security and how to avoid the problems at the end of the day. At the beginning of the development is the perfect time to talk it out with project managers when you can negotiate those requirements.

5) Use more required encryption :

As there is another step added to the process and it makes debugging more tough the most underused concept is encryption as it includes another step to the process and makes much tougher debugging. It is very hard to find the errors in a system and the data has a pile of numbers which is enigmatic and is much more harder.

You can learn Java programming to become a successful professional in this field.

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Frequently Asked JDBC Interview Questions And Answers

For getting to know about various powerful features of Java, you need to clear your basics of JDBC API. With respect to any Java interview, JDBC questions are always available. So please see the below sections which have frequently asked JDBC interview questions and answers for freshers along with experienced Java developers.

1) What is JDBC?

Java Database Connectivity is the full-form for JDBC and it is a standard Java API for relational database communication. For connecting to the database JDBC API has interfaces connection and also performs operations like query and update. For connecting with the database, JDBC API uses JDBC drivers.

Frequently Asked Questions And Answers In Java 8 Default Methods

2) Explain JDBC Driver and its types?

There are classes and interfaces for enabling applications of Java in JDBC driver for interacting with a database. Here are 4 types of JDBC drivers:

Type 1 driver or JDBC-ODBC driver- Native ODBC driver is used by JDBC-ODBC bridge driver for connecting to the database. It turns JDBC method calls into the ODBC function calls.

Type 2 driver or Native-API, partly Java driver- The client-side libraries of the Native API driver is used by the database libraries. The JDBC calls are converted by the driver into database calls with the help of using native API provided by the database. It is a database related driver and once you change from one database to another there is a need to change this driver.

Type 3 driver or Network Protocol pure Java driver- Server sider middleware is used by the Network Protocol driver for converting JDBC calls into the vendor-specific database protocol.

Type 4 driver or Native-protocol, pure Java driver- In today’s world, this is the most frequently used driver. The JDBC calls are converted by the driver directly into database protocols which are specific to a vendor. There are various protocols which are proprietary and therefore the there are database vendors that have a primary source for this driver type.

Read Also:- Do you know about JDBC?

3) Explain the fastest JDBC driver type?

Native Protocol or Type driver is the pure form of Java driver and is considered the fastest driver as it converts into specific vendor protocol from JDBC calls which has direct contact with the database.

4) Explain the types of Statements in JDBC

There are 3 types of JDBC statements:

Statement- For the purpose of executing a static SQL statement during runtime this is used mostly. Using Connection.createStatement() an object of statement class can be created.

Prepared Statement- For the purpose of executing same SQL statement lots of times this statement is used. In a PreparedStatement object SQL statement is precompiled and stored in a Prepared statement object. For executing this statement various times, this object is widely used.

Callable Statement- For executing SQL stored procedures or functions this statement is used and a CallableStatement object class is created using Connection.prepareCall() method.

How to Use the JavaBean API Library

5) Difference between Preparedstatement and Callablestatement

For executing a precompiled SQL statement multiple times, a Prepared statement is used. For executing SQL stored procedures, Callable Statement is used. There are various functions and cursors too in the process of Callable Statement executed and it extends the Prepared statement Interface.

Follow the above JDBC interview questions and answers to be a successful Java developer

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Frequently Asked Questions And Answers In Java 8 Default Methods

There are lots of candidates who are searching for jobs especially in the field of Java and here are few frequently asked Java questions on Java 8 Default Methods. Just keep these things in mind and prepare well before the interview:

1) Is it possible to make Default method static in Java?

No, it is not possible to do so as there is no possibility of making default static methods in Java. If you state default and static method together there will an error popped up saying an illegal combination of modifiers static and default, especially from the compiler.

Read More : Significance Of Abstract Methods and Classes In Java

2) More than one Default methods are present in an interface explain

More than one default methods are possible to be contained in a Java interface. But, it is very much mandatory to find reasons for including multiple default methods on an interface as default implies to one behavior, not multiple behaviors.

3) Is there a possibility to override equals(), toString(), hashcode() from Object Class?

There is no possibility that can override default method from java.lang.object for explaining to override to equals(), Strings() or hashcode() as the default mode in an interface on Java 8 for throwing an error during the compile time as default method toString in parser interface overriding as a member of java.lang.

Read More :  Top 13 Oops Java Interview Questions

4) Inside a class in Java is it possible to declare default methods?

It is not possible but just considers why there is a need for default methods in Java classes, as there is no interface implementation, there is no subclasses implementation needed for a new method included inside a Java class. A change in its subclass is not required if a class needs to evolve.

5) Is there a possibility for default method abstraction in Java?

There is no need to think much about answering this question as it the same when compared to a class be final and abstract at the same time or is it possible to declare a Java method final and abstract? There is an invention in default methods for providing a concrete method inside interface. Just because adding a new method inside interface will break its implementation as they are abstract inherently needing all the clients for implementation.

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