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 a hashmap used for?

1171

What is the new line character?

1108

Where is the find and replace?

939

What is string pooling concept?

996

What is parseint?

951

Does substring create a new object?

946

What is charat ()?

891

What is the r character?

969

How do you declare a variable?

1038

What does int argc char * argv [] mean?

931

How do you change an int to a string?

947

How do you escape a string?

913

What is difference between filereader and bufferedreader?

898

What does indexof mean?

944

What is the use of bufferedreader?

950

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Un-Answered Questions { Core Java }

What is hash code collision?

1003

What is the difference between a factory and abstract factory pattern?

1082

What is difference between classpath and path variables in java?

1133

Can a class be private or protected in java?

1000

What is a memory leak in java?

1015

Is jdk required on each machine to run a java program?

1214

What is native method in java?

1014

take an array with -ve and +ve value both.find out the nearest value of 0(zero).if two values are same like(-2 and +2)then extract +2 is nearest of 0(zero).

1928

What are different data structures in java?

965

What is serialversionuid?

1009

What is volatile data type?

949

Explain the use of sublass in a java program?

973

What is diamond operator in java?

896

What is finalize method?

1043

Can we inherit a class with private constructor?

1058

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