Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

I/O blocking means?

1 4332

what are the purposes of native, transiant key words?

2 8181

Functionality of JVM?

Infosys,

7 31326

what is a static block?

4 8442

what are class,constructor and primitive data types?

IBM,

2 10327

what is an object and how do you allocate memory to it?

Anshinsoft, Wipro,

6 20320

How many ways can an argument be passed to a subroutine?

Technological University of the Philippines,

3 11059

What are different type of access modifiers?

3 10087

How do you set security in applets?

Wipro,

1 6063

Is JRE required to compile Java files ?

HCL,

4 16392

How to set the Heap size in Java ?

HCL,

2 12582

What is the life cycle of Thread ?

HCL, Varnar Softech,

12 42236

What is the format of Inner Class after it compiled?

1 5339

What is the use of anonymous inner classes ?

DELL, HCL,

12 30544

What is the use join() in Threads ?

HCL,

5 12714

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Un-Answered Questions { Core Java }

What is the original name of java?

1127

When do we use synchronized methods in java?

1063

What are the different types of constructor?

1001

What does += mean in java?

1103

what is object-oriented programming in java?

1073

What do you mean by hashing?

1125

what is the significance of listiterator in java?

1090

What is the use of singleton class?

982

What is difference between checked and unchecked exception in java?

1031

What is difference between calling start() and run() method of thread?

1151

what do you mean by java annotations?

1153

Explain throw keyword in java?

1053

In which language java is written?

993

What are the differences between heap and stack memory in java?

1071

Can a class be private?

976

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