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 the major drawback of internal iteration over external iteration?

1085

Why string is immutable or final in java

1143

What is internal iteration in java se 8?

1262

What is thread pool? How can we create thread pool in java?

1151

Why string is popular hashmap key in java?

1 2571

how to create daemon thread in java?

1121

Write a program to print all permutations of string?

1162

Why char array is preferred over string for storing password?

1160

Can we use string in switch case in java?

1137

How can we achieve thread safety in java?

1204

What is string in java? String is a data type?

1062

What is string pool?

1218

When do we need to use internal iteration? When do we need to use external iteration?

1199

How can we create a thread in java?

1082

Differences between external iteration and internal iteration?

1216

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Un-Answered Questions { Core Java }

Why main method is static in java?

1239

What is your platform’s default character encoding?

1141

Can you pass by reference in java?

1037

How strings are created in java?

1088

What is string and its types?

1263

Which class is the superclass of all classes?

1158

What is native method in java?

1124

What is the difference between throw and throws keywords?

1099

How does enum work in java?

1071

What is difference between an object and a class?

1176

What do you know about the garbage collector?

1166

What do you mean by an object in java?

1188

How can we make sure main() is the last thread to finish in java program?

1260

what is singleton in java?

1116

Why is stringbuffer faster than string?

966

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