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

Core Java Interview Questions

Questions Answers Views Company eMail

Can we declare Pointer in Java?

5 1455

What is the default value stored in Local Variables?

5 1388

Difference in the use of print, println, and printf.

5 1171

Is it possible to make an array volatile?

4 1296

What is an object-oriented paradigm?

5 1357

What are the Memory Allocations available in JavaJava?

1 708

What is a singleton class in Java? And How to implement a singleton class?

2 815

Can you explain the Java thread lifecycle?

1 819

In the below Java Program, how many objects are eligible for garbage collection?

1 983

What is JDK? Mention the variants of JDK?

1 811

What are Brief Access Specifiers and Types of Access Specifiers?

1 800

Explain Method Overloading in Java.

1 870

Give a briefing on the life cycle of a thread.

1 787

Brief the life cycle of an applet.

1 656

What are the observer and observable classes?

1 958

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Un-Answered Questions { Core Java }

What is java in simple terms?

960

What is internal variable?

971

Can we create more than one object singleton class?

994

how to open and edit XML file in Weblogic???

1939

Are generics important java?

930

What is hashset in java?

1067

What do you mean by global variable?

906

What is return used for in java?

981

explain multi-threading in java?

980

What is a Presistent Object?

1185

How long will it take to learn java?

942

What is the difference between the final method and abstract method?

997

What is string builder in java?

961

What are unchecked exceptions in java?

999

What is the size of boolean variable?

1033

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