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,

1265

Print Vertical traversal of a Binary Tree.

Amazon,

1067

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,

1381

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

Amazon,

1200

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

Amazon,

1140

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

Amazon,

1165

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

Amazon,

1038

Convert Binary tree to linked list.

Amazon,

1148

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

Amazon,

1159

worst case complexities of Quick sort and Merge sort.

Amazon,

1091

What do you mean by hashing?

Amazon,

1170

What is the definition of tree ?

Amazon,

1132

When can you say a graph to be a tree?

Amazon,

1139

What do you mean by constant time complexity?

Amazon,

1352

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

Amazon,

1154

Un-Answered Questions { Java Related }

What is constructor chaining in java?

1120

What is the purpose of @result?

1073

Explain creating threads by extending thread class ?

1095

What is a parameter example?

1031

What are voids?

1025

What are some advantages of lazy loading?

424

what is Activation Instantinator?

2516

What is request processor and how does it relates to action mapping?

1097

What is jpa in hibernate?

495

What are the data types supported by java?

1084

What is front controller in struts?

1046

how to create constants in java?

1130

What are the steps to send and receive JMS message ?

1425

Difference between GET and POST?

1224

What are facelets templates?

1091

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