Data Structures Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Data Structures Interview Questions

Questions Answers Views Company eMail

Can we null keys in treemap?

956

What is the Difference between treemap and hashmap?

926

Name few collections map implementations?

844

Name few concurrent collection classes?

858

What is the difference between hashset and hashmap?

979

What do you know about the big-o notation and can you give some examples with respect to different data structures?

871

What is difference between array and arraylist? When will you use array over arraylist?

917

What is difference between array and arraylist?

928

What’s the difference between enumeration and iterator interfaces?

853

What is the difference between hashset and treeset?

925

When will you use array over arraylist?

926

What is java priority queue?

918

List the differences between comparable and comparator interface?

873

What are some of the best practices relating to the java collection framework?

847

What is difference between arraylist and linkedlist?

987

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Un-Answered Questions { Data Structures }

Which sorting algorithm has minimum number of swaps?

841

What's difference between stack and queue?

909

Define depth and height of a tree?

1045

What is linear and non linear structure?

909

What actions are performed when a function is called?

925

What is tree in computer science?

933

How do you sort a list in reverse order?

766

What is a list of lists?

880

Which is the simplest file structure?

956

Write the procedure to convert general tree to binary tree?

1016

What is the Difference between treemap and hashmap?

926

Why do we use data structures?

840

Explain the common uses of tree database.

869

How memory is reserved using a declaration statement ?

1116

Explain quick sort and merge sort algorithms.

925

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