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?

1094

Why string is immutable or final in java

1151

What is internal iteration in java se 8?

1266

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

1159

Why string is popular hashmap key in java?

1 2577

how to create daemon thread in java?

1123

Write a program to print all permutations of string?

1169

Why char array is preferred over string for storing password?

1165

Can we use string in switch case in java?

1149

How can we achieve thread safety in java?

1215

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

1066

What is string pool?

1226

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

1207

How can we create a thread in java?

1092

Differences between external iteration and internal iteration?

1221

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Un-Answered Questions { Core Java }

How do I get 64 bit java?

1234

What is meant by class loader? How many types are there?

1343

Write a program to find maximum and minimum number in array?

1058

Why is serialization required?

1023

What is garbage collector?

1148

Do I need to import java.lang package any time? Why?

1471

What is the difference between choice and list?

1147

Difference between final and effectively final ?

1182

What is the difference between error and an exception?

1252

Explain access modifiers in java.

1117

What do you mean by local class?

1065

What if the main() method is declared as private? What happens when the static modifier is removed from the signature of the main() method?

1245

Why Do I Get A "permission Denied" Error After Downloading The .jnlp Java Launcher For The Vkvm?

1211

Is int primitive data type?

1005

What is the difference between C++ and Java and your preferences?

1176

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