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 is Insertion sort, selection sort, bubble sort( basic differences among the functionality of the three sorts and not the exact algorithms)?

TCS,

1070

Write an algorithm to check if there is a loop in a doubly linked list.

DELL,

987

Write an algorithm to find middle element in the linked list.

JPMorgan Chase,

956

Write is a binary search tree? Write an algorithm and tell complexity?

ITC Indian Tobacco Company,

944

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

Wipro,

1001

How would you sort words in a large file?

DELL,

957

Write a program for Sorting an Array. Which sorting will you prefer?

1016

Can you distinguish between ArrayList and Array?

QuestPond,

1132

Program to remove duplicate elements in an array.

InterGraph,

1064

Explain the Stack

Tech Mahindra,

1030

How would you implement two stacks using a single array?

TCS,

1031

What happens if an array goes out-of-bounds?

TCS,

1124

Write a code for dynamic allocation of array.

iNautix,

1110

If you have to store one lakh objects, what will be a better option- a hash map or an array list?

DELL,

1252

Is Arraylist faster than Array? Why?

QuestPond,

1073

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Un-Answered Questions { Data Structures }

What is inserting in data structure?

1010

What's the difference between a hashtable and a hashmap?

969

What are the collision resolution methods?

1020

Is heap sort faster than quicksort?

873

What is the default capacity of hashmap?

886

What is the time complexity of hashmap get () and put () method?

936

Run time memory allocation is known as in data structure?

983

Which is the parent class of hashmap class?

1216

Define threaded binary tree.

1079

What are the 4 types of data?

1079

What is Insertion sort, selection sort, bubble sort( basic differences among the functionality of the three sorts and not the exact algorithms)?

1070

What is the purpose of tochararray ()?

1059

Differentiate between hashset and treeset.

1059

What exactly is a thread?

969

What is the difference between array and stack?

1103

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