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 do you mean by ordered and sorted in collections in java?

996

Why java is called not pure object oriented language?

1022

List some important features of java 10 release?

1079

What do you mean by garbage collection used in java?

1069

Why does java does not support multiple inheritance? Explain

974

what do you mean by marker interface in java?

983

What is difference between classpath and path variables in java?

1197

Explain the difference between jvm and jre?

1040

What do you mean by composition in java?

1026

What do you mean by inner class in java?

1086

How we can run a jar file through command prompt in java?

971

List the different types of classloaders in java.

972

What are different access specifiers in java? Explain

1125

Why we used break and continue statement in java?

1145

What is an interface in java? Explain

1194

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Un-Answered Questions { Core Java }

Write a program to find maximum and minimum number in array?

1001

What are adapter classes?

1051

What is the purpose of file class?

1025

What is the base class of all classes?

1059

Define an enumeration?

1049

What is the difference between stream and buffer?

967

Can substring create new object?

1124

What is var keyword ?

1191

What string is utf8?

997

What is javac in java?

1008

Explain purpose of sleep() method in java?

1122

What is an array length?

904

Variables used in a switch statement can be used with which datatypes?

999

What is instanceof keyword?

1216

What is the locale class in java programming?

1081

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