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?

1151

What is string subsequence method?

1178

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

1260

how to split string in java?

1289

What does string intern() method do?

1135

Difference between string, stringbuffer and stringbuilder?

1073

What is volatile keyword in java

1186

Explain differences between collection api and stream api?

1244

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

1089

Does string is thread-safe in java?

1146

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

1076

How to convert string to char and vice versa?

1054

Write a method to check if input string is palindrome?

1069

How can we make string upper case or lower case?

1142

How to compare two strings in java program?

1106

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Un-Answered Questions { Core Java }

what is session in java?

1324

Explain about the main() method in java?

1188

What is string and its types?

1263

How do I find and replace in word?

1033

What is general methodology?

1102

I want to print “hello” even before main is executed. How will you acheive that?

1154

Explain access specifiers?

1245

Which class is the superclass of all classes?

1158

Explain implementation and how is it different from conversion?

1139

What does jenkins do?

976

Explain what access modifiers can be used for methods?

1126

What is the purpose of an interface?

1100

Why there is no call by reference in java?

979

Write code to implement bubble sort in java?

1050

Can we have any other return type than void for main method?

1001

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