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 array pointers ?

Amdocs,

992

What is better- service oriented or batch oriented solutions?

Amdocs,

2160

What is difference between an object and a class?

Amdocs,

1089

What is the purpose of checked and unchecked exceptions in JAVA?

Amdocs,

965

What is the significance of continue jump statement? Explain with an example.

Amdocs,

1265

What is widening and narrowing in java? Discuss with an example.

Amdocs,

999

Write the algorithm to check the number non-leaf nodes in a tree.

Amdocs,

1025

Differentiate between class and structure.

Amdocs, Motorola,

1078

Explain implementation and how is it different from conversion?

Aricent,

1027

Explain what pure virtual function is?

Aricent,

978

How will you calculate the depth of a binary tree if the tree contains 15 nodes?

Aricent,

1043

Is it necessary for the port addresses to be unique? Explain with reason.

Aricent,

980

Tell me how many ways are there to initialise an integer with a constant.

Aricent,

1072

Can you make a constructor final in Java?

SwanSoft Technologies,

1079

Differences between C and Java?

TCS,

1134

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Un-Answered Questions { Core Java }

Can we clone singleton class in java?

923

Is java good for beginners?

974

Can we call a non-static method from inside a static method?

967

Can array grow dynamically in java?

925

What is the difference between procedural and object-oriented programs?

945

Which is better stringbuffer or stringbuilder?

879

How will you serialize a singleton class without violating singleton pattern?

1913

What is the difference between Java1.4 and Java1.5

2264

What is a numeric literal?

1016

Write a java program that prints all the values given at command-line.

982

What is a blocking method in Java?

1155

What is object-oriented programming?

1040

What is difference between public static and void?

953

What is the common usage of serialization?

1083

What are void pointers?

1237

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