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

Data Structures Interview Questions

Questions Answers Views Company eMail

If you are given a choice to use either arraylist and linkedlist, which one would you use and why?

987

Which is the parent class of deque class?

928

Can we add heterogeneous elements into treemap?

959

Treemap orders the elements on which field?

912

Will it create any problem if we add elements with key as user defined object into the treemap?

908

Which is the parent class of linkedhashset class?

910

Will this code give error if I try to add two heterogeneous elements in the arraylist? And why?

955

Can we override compareto method for enumerations?

998

If I try to add enum constants to a treeset, what sorting order will it use?

1154

What is the difference between list, set and map?

985

Which is the parent class of linkedlist class?

1021

Can we add duplicate keys in a hashmap? What will happen if we attempt to add duplicate values?

838

Which are the sorted collections?

950

Why using cookie to store session info is a better idea than just using session info in the request?

933

What are the Differences between map and hashmap?

1006

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Un-Answered Questions { Data Structures }

Discuss the difference between a stack and an Array?

921

Define balancing condition for AVL Tree.

1034

What is difference between arraylist and list?

919

What is binary tree example?

946

What is the difference between array list and vector list?

904

How can we reverse a singly linked list?

1007

Differentiate between compilers and interpreters.

927

Describe tree database. Explain its common uses.

979

How to initialize Dictionary using collection initialize?

1042

Does stringutils isempty check for null?

800

Can we declare array size as a negative number?

1002

Why do we use sorting?

867

How do you rotate an AVL tree?

973

What is a map in programming?

885

Can I provide array size dynamically?

936

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