Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

What is update method and when it is called?

TCS,

2 19340

When we will use an Interface and Abstract class?

9 28433

While opening the file, what type of exceptions can be caught?

3 6202

What methods are called, When we navigate from one applet to another applet?

1 7150

How 'java' got its name and what it stands for?

Wipro,

11 31693

Where the CardLayout is used?

1 7681

Which Component subclass is used for drawing and painting?

1 3632

Name the method of a Container that can be used to cause a container to be laid out and redisplayed?

1 5208

Which Java operator is right associative?

3 8345

What is the method used to get the absolute value of a number?

2 5645

Name the method that is used to set a TextComponent to the read-only state?

1 4937

In what types of operations an ArithmeticException will be thrown?

3 6728

Which characters are allowed to use as the second character of an identifier, and which characters are not allowed?

2 5224

Which class has no duplicate elements?

8 16236

Which class is extended by all other classes?

4 10332

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Un-Answered Questions { Core Java }

What is the use of arrays tostring () in java?

1041

Is java based on c?

997

What is private public protected in java?

1035

Explain about serializable interface in java?

1010

What happens when you invoke a thread’s interrupt method while it is sleeping or waiting?

983

What is the use of keywords in java?

982

Are arrays passed by reference in java?

917

Can we override the overloaded method?

1149

What is the file extension for java?

1075

How to create a fecelet view?

989

What is the main method java?

1037

How to set the permissions to a file in java?

989

What is the do while loop syntax?

1036

What is a void in java?

1175

Is java call by value?

1098

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