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 will you reverse a singly-link list?

Akamai Technologies,

1004

Is linked list a linear or non-linear data structure?

Akamai Technologies,

966

What are the Main functions of Java?

Akamai Technologies,

1089

State the merge-sort principle and its time complexity.

Akamai Technologies,

975

What are access specifiers in java ?

Akamai Technologies,

1136

What data structures are used to perform recursion?

Akamai Technologies,

1047

What is a stack class in java ?

Akamai Technologies,

1104

What is method overloading in JAVA? Why is it not present in C ?

Akamai Technologies,

1099

What is the difference between quicksort & mergesort? When should they be used? What is their running time?

Akamai Technologies,

1086

Lowest Common ancestor in a Binary Search Tree and Binary Tree.

Amazon,

930

Program to Find the second largest element in an array.

Amazon,

1184

Print Vertical traversal of a Binary Tree.

Amazon,

1013

Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)

Amazon,

1330

Is {a, n, d} a palindrome? If you are given a random string, is it a palindrome or not?

Amazon,

1127

Add a value x to array from index l to r where 0 <= l <= r <= n-1

Amazon,

1093

Post New Core Java Questions

Un-Answered Questions { Core Java }

Explain the difference between transient and volatile in java?

1002

Can we use return in constructor?

946

Can static methods be inherited?

1040

What is a buffer in computer?

998

Difference between this() and super() in java ?

1074

What is broken and continue statement?

995

What are the benefits of immutable objects?

1004

What are parsing rules?

988

Which collection is sorted in java?

1034

How do you add an element to a hashset in java?

1005

What is jit compiler in java?

1103

How to implement a multithreaded applet?

2667

Highest level event class of the event-delegation model?

4007

What do you mean by singleton class in java?

904

Why is string builder not thread safe?

1057

For More Un-Answered { Core Java } Questions Click Here