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 check if linked list contains loop in java?

917

5 Coding best practices you learned in java?

1026

How does hashset works in java?

1106

Explain the difference between private, public, package and protected in java?

1061

Can we have return statement in finally clause? What will happen?

986

Write a java program to check if a number is prime or not?

1051

What is equlas() and hashcode() contract in java? Where does it used?

1151

How do you sort arraylist in descending order?

1039

How do you convert bytes to character in java?

1024

Write a program to solve producer consumer problem in java?

1030

Explain the difference between hashmap and hashtable in java?

963

What is difference between checked and unchecked exception in java?

1031

Explain the difference between extends thread vs implements runnable in java?

1156

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

1011

Write a program to calculate factorial in java?

1020

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Un-Answered Questions { Core Java }

How do you invoke a method?

1019

Explain different ways of creating a thread. Which one would you prefer and why?

1057

Is null function in java?

1065

describe synchronization in respect to multithreading? : Java thread

942

Explain about join() method?

986

Which sorting is best in java?

1014

What is the difference between a method and a procedure?

1079

What is number data type in java?

1023

Can set contain duplicates?

1020

What are three advantages of using functions?

1025

Explain about the security aspect of java?

983

What is collections framework?

1166

What is a classloader in java?

1043

How can you read content from file in java?

1023

How many bytes is a url?

1004

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