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 30860

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

Sonata,

1 5486

can we create instance for interface in java?

4 21143

What is Session reduplication and how its done?

2087

Which all r Final classes in java except string?

HCL,

5 34693

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

Lucent,

6 19690

What is the difference between java and .Net?

Bosch,

39 110649

What is the difference between jsp and servlet?

Symphony,

6 13404

Diff between C++ and java?

TCS,

9 12396

can we create a instance for intwerface?

3 6662

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

3 5785

what is difference between String buffer and String builder?

Benchmark,

5 12696

what is the use of custom tags? with example?

Photon,

1 4826

what is the life cycle of jsp?

Photon,

3 8806

what are the jsp tags with example?

Photon,

1 5385

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Un-Answered Questions { Core Java }

How can you set an applet’s height and width as a percentage?

980

Difference between concurrent hashmap and hashtable and collections

1140

What is a void method java?

1009

How do you sort a string in alphabetical order in java?

973

What is the advantage of OOP in java?

1211

Can we increase size of array?

1077

Name some OOPS Concepts in Java?

1139

Does java return by reference?

1077

What is binary tree in java?

1124

What is the name of the java compiler?

1100

What is a type parameter in java?

1067

Can we override constructors?

1056

Can there be an abstract method without an abstract class?

1015

What exceptions occur during serialization?

1151

What does function identity () do?

1027

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