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 19339

When we will use an Interface and Abstract class?

9 28415

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

3 6189

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

1 7143

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

Wipro,

11 31679

Where the CardLayout is used?

1 7681

Which Component subclass is used for drawing and painting?

1 3628

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

1 5201

Which Java operator is right associative?

3 8336

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

2 5640

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

1 4933

In what types of operations an ArithmeticException will be thrown?

3 6719

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

2 5223

Which class has no duplicate elements?

8 16213

Which class is extended by all other classes?

4 10327

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Un-Answered Questions { Core Java }

What are the practical benefits, if any, of importing a specific class rather than an entire package (e.g. Import java.net.* Versus import java.net.socket)?

1114

What is the best way to findout the time/memory consuming process?

1032

What are exception handling keywords in java?

1034

Can we return null in java?

1152

How does split work in java?

1050

What are the restriction imposed on a static method or a static block of code?

1059

What is the final blank variable?

1137

Can we assign the reference to this variable?

974

What is default switch case? Give example.

1007

What is a bufferedreader?

1094

what is method reference in java 8?

1034

What is bufferedreader in java?

1046

What is java lang string?

983

How many types of gc are there in java?

996

What are constructors in java?

1116

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