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 polymorphism and what are the types of it?

1005

What is broken and continue statement?

1016

Define an enumeration?

1063

What is a finally block? Is there a case when finally will not execute?

1108

Is it possible to use string in the switch case?

1061

Compare overloading and overriding?

1023

What is the difference between import java.util.date and java .util?

1069

how to create constants in java?

1095

How to change the priority of thread or how to set the priority of thread?

1055

Garbage collection in java?

1038

How do you test a method for an exception using junit?

1227

Can a constructor call another constructor?

999

Explain 5 features introduced in jdk 1.7?

1039

Can we use a switch statement with strings?

1070

Can we have a try block without catch block?

1011

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Un-Answered Questions { Core Java }

What is parsing and its types?

1130

What design pattern you have used in your project? I answered Factory pattern, how it is implemented? What are its advantage? Do know about Abstract Factory?

2523

When is update method called?

1159

What will be the output of round(3.7) and ceil(3.7)?

1137

What is static data type in java?

1043

Is string thread safe in java?

1104

What is the purpose of sizeof operator?

1075

What is a dot notation?

1046

I don’t want my class to be inherited by any other class. What should I do?

1027

What is hashmap in java?

1071

What is ternary operator in java?

1080

How do you use parseint in java?

995

Explain the difference between runnable and callable interface in java?

1066

What is the use of coding?

982

What is not object oriented programming?

967

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