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 a instance variable in java?

1044

What is the role of garbage collector in java?

964

How many types of gc are there in java?

993

Why are functions called methods in java?

1000

Does java have extension methods?

975

What is extension method in java?

1038

What is the file extension for java?

1072

Can we start a thread twice in java?

982

How do you join strings in java?

1046

How do you stop a thread in java?

1054

Is alive and join method in java?

1165

Is alive in java?

945

Is namespace same as package in java?

984

What are predicates in java 8?

1013

What are streams in java 8?

999

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Un-Answered Questions { Core Java }

What is the covariant return type?

1087

Is java util regex pattern thread safe?

1016

What classes of exceptions may be caught by a catch clause in java programming?

1175

How to perform quicksort in java?

1109

Can I learn java in 3 months?

1023

Difference between error and exception

6050

Is object a data type in java?

1107

What are different ways of object creation in java ?

1074

In how many ways we can create threads in java?

1215

Does sprintf add a null terminator?

1095

What does i ++ mean in Java?

950

What is the final field modifier?

972

What is the difference between delete and delete[]

1530

How do you add an arraylist to an array in java?

976

What is Java Reflection API? Why it’s so important to have?

1158

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