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

Data Structures Interview Questions

Questions Answers Views Company eMail

Can we null keys in treemap?

994

What is the Difference between treemap and hashmap?

987

Name few collections map implementations?

885

Name few concurrent collection classes?

899

What is the difference between hashset and hashmap?

1034

What do you know about the big-o notation and can you give some examples with respect to different data structures?

920

What is difference between array and arraylist? When will you use array over arraylist?

969

What is difference between array and arraylist?

984

What’s the difference between enumeration and iterator interfaces?

910

What is the difference between hashset and treeset?

986

When will you use array over arraylist?

960

What is java priority queue?

963

List the differences between comparable and comparator interface?

922

What are some of the best practices relating to the java collection framework?

900

What is difference between arraylist and linkedlist?

1034

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Un-Answered Questions { Data Structures }

Explain the Queue

1000

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

959

How can I search for data in a linked list?

941

What is the difference between hashset and hashtable?

924

Why do we need to use computers to help us sort lists?

911

What is perfect binary tree?

831

Explain extended binary tree.

960

what is the difference between dynamic as well as non - dynamic data structures.

949

How do you reference all the elements in a one-dimension array?

1029

Can hashmap store null values?

898

Explain multiply linked list in short.

910

What do you mean by the term “percolate up”?

949

What is the purpose of sorting algorithms?

972

Is array immutable?

894

What is placement new in data structures?

982

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