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Core Java Interview Questions
Questions Answers Views Company eMail

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

Amazon,

1164

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

Amazon,

1032

Convert Binary tree to linked list.

Amazon,

1146

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

Amazon,

1156

worst case complexities of Quick sort and Merge sort.

Amazon,

1090

What do you mean by hashing?

Amazon,

1168

What is the definition of tree ?

Amazon,

1126

When can you say a graph to be a tree?

Amazon,

1135

What do you mean by constant time complexity?

Amazon,

1339

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

Amazon,

1152

You're given a Boolean 2D matrix, can you find the number of islands?

Amazon,

1150

What steps are taken when the OS shifts from one-thread execution to another?

Amazon,

1415

What are the differences between graph and tree?

Amazon,

1160

Differentiate between overriding and overloading cases?

Amdocs,

1168

Differentiate between run time error and syntax error.

Amdocs,

1198

Post New Core Java Questions

Un-Answered Questions { Core Java }

What are the benefits of operations in java?

1132

If a class is declared without any access modifiers, where can the class be accessed?

1109

What is a top level class in java?

1088

What does three dots mean in java?

1199

What are adapter classes?

1105

What is lastindexof in java?

1178

What modifiers are allowed for methods in an interface?

1217

What is a heavyweight component?

1073

What is == mean?

1046

List some important characteristics on jre

1134

When do I need to use reflection feature in java?

1138

How can the checkbox class be used to create a radio button?

1079

Define locale.

1096

How do you read a char in java?

1096

What is the numeric promotion?

1098

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