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,

1086

What is better- service oriented or batch oriented solutions?

Amdocs,

2298

What is difference between an object and a class?

Amdocs,

1173

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

Amdocs,

1072

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

Amdocs,

1355

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

Amdocs,

1109

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

Amdocs,

1126

Differentiate between class and structure.

Amdocs, Motorola,

1187

Explain implementation and how is it different from conversion?

Aricent,

1136

Explain what pure virtual function is?

Aricent,

1073

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

Aricent,

1137

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

Aricent,

1057

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

Aricent,

1156

Can you make a constructor final in Java?

SwanSoft Technologies,

1197

Differences between C and Java?

TCS,

1292

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Un-Answered Questions { Core Java }

What is the difference amongst jvm spec, jvm implementation, jvm runtime ?

1019

What is foreach loop in java?

1071

Is java a virus?

1023

How many JVMs can run on a single machine and what is the Just-In-Time(JIT) compiler?

1101

What is use of valueof () in java?

1109

What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement?

1175

Difference between linkedlist and arraylist.

1120

What is the static block?

1120

What are operators and its types?

1112

Can a class be private in java?

1047

Explain the use of shift operator in java. Can you give some examples?

1039

Why enumeration is faster than iterator?

993

What is an array length?

963

Can this keyword be used to refer static members?

1074

What is unmodifiable collection in java?

973

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