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?

999

What are wrapper classes in java?

1092

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

947

Is multiple inheritance supported by java?

1010

What is a map in java?

1016

Explain jdk, jre and jvm?

985

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

1062

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

1080

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

1298

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

1125

Define a java class.

1 1474

Why pointers are not used in java?

1143

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

997

What is multiple inheritance? Is it supported by java?

982

What is collection class in java?

1026

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Un-Answered Questions { Core Java }

How do you square a number?

1293

How will you communicate between two applets?

1181

What is the difference between state-based unit testing and interaction-based unit testing?

946

What are the four integer types supported by java?

1049

Why super is first line in java?

1073

What is mnemonic in assembly language?

1088

What is jit compiler in java?

1132

What is the purpose of javac exe?

1114

What do you understand by access specifiers in Java?

1031

How can we create a synchronized collection from given collection?

1095

What is r * in math?

1017

What is singleton class in java and how can we make a class singleton?

1174

How many threads does a core java have?

1083

Why does my function print none?

969

What is static keyword?

1169

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