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 4416

what are the purposes of native, transiant key words?

2 8262

Functionality of JVM?

Infosys,

7 31545

what is a static block?

4 8578

what are class,constructor and primitive data types?

IBM,

2 10407

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

Anshinsoft, Wipro,

6 20523

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

Technological University of the Philippines,

3 11187

What are different type of access modifiers?

3 10227

How do you set security in applets?

Wipro,

1 6134

Is JRE required to compile Java files ?

HCL,

4 16525

How to set the Heap size in Java ?

HCL,

2 12675

What is the life cycle of Thread ?

HCL, Varnar Softech,

12 42576

What is the format of Inner Class after it compiled?

1 5393

What is the use of anonymous inner classes ?

DELL, HCL,

12 30888

What is the use join() in Threads ?

HCL,

5 12914

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Un-Answered Questions { Core Java }

How does java enable high performance?

1207

What is string :: npos?

1192

How do I get a substring?

1047

What is the difference between Java and C++?

1273

How are observer and observable used in java programming?

1085

How many bytes are a float?

1041

What is character in data type?

1015

what is the purpose of the wait(), notify(), and notifyall() methods? : Java thread

1057

Explain throw keyword in java?

1104

What is the difference between superclass and subclass?

1265

What is meant by null and void?

1043

What does replaceall do in java?

982

Can a constructor call the constructor of parent class?

1094

Is there any difference between synchronized methods and synchronized statements?

1146

what are the high-level thread states? : Java thread

1085

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