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 1450

What is the default value stored in Local Variables?

5 1381

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

5 1167

Is it possible to make an array volatile?

4 1294

What is an object-oriented paradigm?

5 1355

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?

1 980

What is JDK? Mention the variants of JDK?

1 811

What are Brief Access Specifiers and Types of Access Specifiers?

1 799

Explain Method Overloading in Java.

1 869

Give a briefing on the life cycle of a thread.

1 787

Brief the life cycle of an applet.

1 655

What are the observer and observable classes?

1 958

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Un-Answered Questions { Core Java }

Is space a character in java?

969

What is boolean data type in java?

944

What is a java object and java application?

992

What does null mean in java?

1026

What types of index data structures can you have in java?

1143

What is the formula to calculate percentage?

971

What is the need of transient variables in Java ?

1035

What is thread start?

918

how its run?

1016

What is the difference between I ++ and ++ I in java?

933

What is arraylist e in java?

1011

Why do we use bufferedreader?

935

What is the purpose of object oriented programming?

927

Can we declare a static variable inside a method?

959

what is use of functional interface in java 8?

983

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