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

An array having 100 elements have numbers from 1 to 99 randomly out of which any number is repeated. Find the repeated number in minimum time and space complexity.

1162

Explain the difference between a list and array.

TCS,

953

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

Expedia, GrapeCity,

957

What is the difference between Array and Array List ? Explain in brief with example.

MCN Solutions,

959

What is the procedure to insert into a sorted array?

Wipro,

977

Tell me the difference between the character array and a string.

Honeywell, HPCL, Huawei, Zomato,

948

What will happen if an array goes out of bounds?

Amdocs, HAL,

1092

Explain the Queue

Tech Mahindra,

1000

Why it is important to have aligned addresses? What is the exception generated when there is a misaligned address?

Ciena,

887

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Un-Answered Questions { Data Structures }

Why we use linked list?

905

What is stack and its operations?

846

What is difference between treeset hashset linkedhashset?

911

Does arraylist maintain order?

896

Is red black tree balanced?

886

Why do we need algorithm?

879

what is Linked lists?

976

Difference between calloc and malloc ?

940

What exactly is a thread?

912

Write a program to insert an element and in the specific position in the array?

903

What are the applications of graph data structure?

903

How do you explain bubble sort?

871

State the different ways of representing expressions?

1206

How do you find the size of an arraylist?

826

How to increase stack limit in w3wp.exe?

1044

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