Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

How to convert string to byte array and vice versa?

1110

What is string subsequence method?

1149

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

1218

how to split string in java?

1236

What does string intern() method do?

1104

Difference between string, stringbuffer and stringbuilder?

1037

What is volatile keyword in java

1142

Explain differences between collection api and stream api?

1200

What are the three parts of a lambda expression? What is the type of lambda expression?

1046

Does string is thread-safe in java?

1105

What is java thread dump, how can we get java thread dump of a program?

1014

How to convert string to char and vice versa?

1016

Write a method to check if input string is palindrome?

1034

How can we make string upper case or lower case?

1094

How to compare two strings in java program?

1066

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Un-Answered Questions { Core Java }

which class is the wait() method defined in? : Java thread

963

What does the ‘static’ keyword mean? Is it possible to override private or static method in java?

1002

What are the advantages of user defined functions?

1023

Is it possible to use string in the switch case?

1060

Why main method is static in java?

1193

What are the legal operands of the instanceof operator?

1042

Write a function for palindrome and factorial and explain?

1092

How many days will it take to learn java?

947

Why bytecode is called bytecode?

1227

Is java a security risk?

1058

What is the output of the below java program?

1065

Which is the best sorting technique in java?

996

What is arraylist class in java?

1081

What is super?

1183

Define jit compiler?

1154

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