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 bytecode? watz the difference between machine code and bytecode?

Oracle,

9 30580

watz the difference between abstract class and interface? Which one u ill choose as a designer?

Sonata,

1 5384

can we create instance for interface in java?

4 20937

What is Session reduplication and how its done?

2039

Which all r Final classes in java except string?

HCL,

5 34553

what is bytecode ?explain in detail and watz the difference between bytecode and machine code?

Lucent,

6 19459

What is the difference between java and .Net?

Bosch,

39 109640

What is the difference between jsp and servlet?

Symphony,

6 13163

Diff between C++ and java?

TCS,

9 12120

can we create a instance for intwerface?

3 6515

y cant i declare method like public final static show()

3 5648

what is difference between String buffer and String builder?

Benchmark,

5 12444

what is the use of custom tags? with example?

Photon,

1 4756

what is the life cycle of jsp?

Photon,

3 8671

what are the jsp tags with example?

Photon,

1 5296

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Un-Answered Questions { Core Java }

Does a function need a return?

972

What is difference between static and final?

1072

Does java set allow duplicates?

1091

Can a final variable be manipulated in java?

984

What is a instance variable in java?

1051

List some java keywords sun like c, c + + keywords?

1004

How do you compare arrays in java?

954

define polymorphism in java

1096

What is the use of :: in java?

1014

Can we write multiple catch blocks under single try block?

1088

How to sort list of list in java?

1094

Difference between string, string builder, and string buffer?

1109

What are use cases?

981

How to change value in arraylist java?

1184

Explain the available thread states in a high-level?

972

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