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

Data Structures Interview Questions

Questions Answers Views Company eMail

What does the dummy header in the linked list contain?

1151

How many pointers are necessary to implement a simple linked list?

1110

How can you insert a node at the end of linked list?

864

Differentiate between singly and doubly linked lists?

969

What is the difference between the hash table and hash map?

994

How does hashset work internally in java?

996

For addition and deletion. Which one is most preferred: array list or linked list?

881

Is it possible to make an array volatile in java?

904

For searches. Which one is most preferred: array list or linked list?

931

What is a spanning tree?does the minimum spanning tree of a graph give the shortest distance between any 2 specified nodes?

888

Which is the simplest file structure?

996

Differentiate between queue and deque.

948

Differentiate between hashset and hashmap.

977

Differentiate between iterator and enumeration.

901

Differentiate between hashset and treeset.

993

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Un-Answered Questions { Data Structures }

Which sorting has less time complexity?

915

Will hashmap allow null keys?

905

What is binary tree and its types?

967

What are the properties of binary heap?

1008

Check if duplicates exist in an array of N which has range 1 to N.

956

Sorting is not possible by using which of the methods?

913

What is minimum depth of binary tree?

957

Describe tree database.

881

What is the height of a binary tree?

930

Define a stack?

1057

Can hashmap store null values?

896

How will you sort the elements of array in descending order?

941

Define forest?

971

What is binary tree? Explain its uses.

882

What are binary search and fibonacci search?

949

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