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

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Java Related Interview Questions

Questions Answers Views Company eMail

Program to Find the second largest element in an array.

Amazon,

1190

Print Vertical traversal of a Binary Tree.

Amazon,

1017

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,

1335

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

Amazon,

1134

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

Amazon,

1095

Implement a stack with push (), pop() and min() in O(1) time.

Amazon,

1113

Find the value of a specified element of the array arr[i] where 0 <= i <= n-1

Amazon,

984

Convert Binary tree to linked list.

Amazon,

1093

Convert a BST into a DLL and DLL to BST in place.

Amazon,

1116

worst case complexities of Quick sort and Merge sort.

Amazon,

1033

What do you mean by hashing?

Amazon,

1109

What is the definition of tree ?

Amazon,

1040

When can you say a graph to be a tree?

Amazon,

1085

What do you mean by constant time complexity?

Amazon,

1250

Write a program to show whether a graph is a tree or not using adjacency matrix.

Amazon,

1098

Un-Answered Questions { Java Related }

Why is inheritance used in java?

1124

How is a domain template created?

988

Is an xslt processor bundled in weblogic server?

1019

What is integer valueof?

1110

There is a method getColumnCount in the JDBC API. Is there a similar method to find the number of rows in a result set?

1043

What are the characteristics of Final,Finally and Finalize keywords.

1177

What are the restrictions for the entity classes?

407

Can we make the abstract methods static in java?

1062

What is the difference between session bean and entity bean ?

921

Can we override the static methods?

1033

What is a resource in spring?

402

Explain about the validation steps which have to be carried during validation of client-side address?

984

How many bytes is a url?

986

Why do we use @override?

405

What are functional testing and unit testing?

964

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