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 30568

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

Sonata,

1 5382

can we create instance for interface in java?

4 20930

What is Session reduplication and how its done?

2038

Which all r Final classes in java except string?

HCL,

5 34543

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

Lucent,

6 19448

What is the difference between java and .Net?

Bosch,

39 109592

What is the difference between jsp and servlet?

Symphony,

6 13153

Diff between C++ and java?

TCS,

9 12103

can we create a instance for intwerface?

3 6511

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

3 5645

what is difference between String buffer and String builder?

Benchmark,

5 12429

what is the use of custom tags? with example?

Photon,

1 4754

what is the life cycle of jsp?

Photon,

3 8668

what are the jsp tags with example?

Photon,

1 5294

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Un-Answered Questions { Core Java }

Does java support multiple inheritances?

1022

Explain where variables are created in memory?

1014

What is the difference between an interface and an abstract class?

1006

What a static class can contains?

1154

What is generic class?

1094

Why is it called a string?

1011

Explain about arraylist?

1105

What do you understand by soft reference?

1056

Is an object null?

975

How do you remove an element from an arraylist in java?

1009

What is the difference between == and === javascript?

1181

What is the difference between multitasking and multithreading in Java

1185

How static variable work in java?

1126

Is it possible to cast an int value into a byte variable? What would happen if the value of int is larger than byte?

954

Give reasons supporting that string is immutable.

942

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