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.

1171

Explain the difference between a list and array.

TCS,

959

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

Expedia, GrapeCity,

968

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

MCN Solutions,

971

What is the procedure to insert into a sorted array?

Wipro,

984

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

Honeywell, HPCL, Huawei, Zomato,

958

What will happen if an array goes out of bounds?

Amdocs, HAL,

1099

Explain the Queue

Tech Mahindra,

1010

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

Ciena,

900

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Un-Answered Questions { Data Structures }

What are the parts of a linked list?

1041

State the demerits of linked representation of binary trees?

931

When is a graph said to be weakly connected?

997

Why we use linked list?

911

Why is arraylist not thread safe?

918

In what scenario, binary search can be used?

919

Is arraylist heterogeneous?

880

Does treemap preserve order?

847

Which interfaces are implemented by linkedhashset?

1034

What are dynamic data structures?

1350

What are binary search and fibonacci search?

961

Give a real time example of stack

947

Is map a collection?

857

What is difference between an Array and ArrayList?

1007

What is quick sort example?

864

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