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

Core Java Interview Questions

Questions Answers Views Company eMail

List two java ide’s?

1057

Which package has light weight components?

1021

What is the primary benefit of encapsulation?

1104

Java.util.regex consists of which classes?

1007

What do you mean by object?

994

According to java operator precedence, which operator is considered to be with highest precedence?

1106

What do you know about java?

977

What do you mean by access modifier?

1052

What are the data types supported by java? What is autoboxing and unboxing?

1035

What does the “static” keyword mean? Can you override private or static method in java?

1108

What is structure of java heap? What is perm gen space in heap?

1139

What is function overriding and overloading in java?

1129

What is the difference between a synchronized method and a synchronized block?

1083

Why collection doesn’t extend cloneable and serializable interfaces?

1121

Explain different ways of creating a thread?

1085

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Un-Answered Questions { Core Java }

Differences between external iteration and internal iteration?

1179

What are the characteristics of Final,Finally and Finalize keywords.

1193

What happens when a thread cannot acquire a lock on an object in java programming?

1034

What are the major drawbacks of external iteration?

1079

What is basic syntax?

1060

What is a java string?

1101

Explain the hierarchy of java exception classes?

1128

What is keyword and identifier?

1150

What is variable in java?

997

Can java list be null?

1007

When to use runnable interface vs thread class in java?

996

What is a Hash Table? What are the advantages of using a hash table?

1100

Why java is considered as platform independent?

1023

What are measurable parameters?

1094

What is singleton math?

1160

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