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 an association?

992

What are wrapper classes in java?

1083

What is the difference between array list and vector in java?

941

Is multiple inheritance supported by java?

1004

What is a map in java?

998

Explain jdk, jre and jvm?

980

What is the difference between this() and super() in java?

1053

What is an infinite loop in java? Explain with an example.

1060

What is a package in java? List down various advantages of packages.

1282

What is the difference between a local variable and an instance variable?

1114

Define a java class.

1 1457

Why pointers are not used in java?

1138

List down the methods and interfaces of collection class in java.

991

What is multiple inheritance? Is it supported by java?

973

What is collection class in java?

1016

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Un-Answered Questions { Core Java }

What is the major advantage of external iteration over internal iteration?

1111

What is gc()?

1075

How to check if a list is sorted in java?

1041

How to convert string to byte array and vice versa?

1097

What is the difference between stream and buffer?

972

If a class is declared without any access modifiers, where can the class be accessed?

1069

What is the size of integer?

1101

What is difference between public static and void?

1027

Why stringbuffer is faster than string?

1047

What are the advantages and disadvantages of object cloning?

1111

What is a return in java?

1033

What's the default access specifier for variables and methods of a class?

1122

How does java pattern compile work?

974

explain autoboxing in java?

1016

How variables are declared?

985

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