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 use of valueof () in java?

1104

What is flush () in java?

1070

What is immutable class in java?

1002

How do you use substring in java?

1195

How do I remove a character from a string in java?

1005

Why do we need strings in java?

1039

What does replaceall do in java?

962

How do you replace a string in java?

1052

What does n mean in java?

1016

What is == in java?

1071

Why inputstreamreader is used in java?

1053

What is charat java?

1021

How do you check if a string is lexicographically in java?

998

What is use of static in java?

1237

What is :: operator in java?

1026

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Un-Answered Questions { Core Java }

What is application system?

1008

What is the best way to findout the time/memory consuming process?

1074

Is 9 a prime number?

932

What is difference between iterator and enumeration in java?

1035

What is the use of StringTokenizer class?

1111

What is the difference between method and means?

1123

What is meant by javabeans?

1131

How will you communicate between two applets?

1212

What is singleton pattern?

1160

What is the transient keyword?

2340

What is object cloning in Java?

1149

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

1125

How many decimal digits is 64 bit?

984

Why 1 is not a prime number?

1074

Which is better stringbuffer or stringbuilder?

968

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