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

Data Structures Interview Questions

Questions Answers Views Company eMail

If you are given a choice to use either arraylist and linkedlist, which one would you use and why?

988

Which is the parent class of deque class?

929

Can we add heterogeneous elements into treemap?

960

Treemap orders the elements on which field?

913

Will it create any problem if we add elements with key as user defined object into the treemap?

908

Which is the parent class of linkedhashset class?

911

Will this code give error if I try to add two heterogeneous elements in the arraylist? And why?

956

Can we override compareto method for enumerations?

999

If I try to add enum constants to a treeset, what sorting order will it use?

1154

What is the difference between list, set and map?

985

Which is the parent class of linkedlist class?

1022

Can we add duplicate keys in a hashmap? What will happen if we attempt to add duplicate values?

838

Which are the sorted collections?

950

Why using cookie to store session info is a better idea than just using session info in the request?

933

What are the Differences between map and hashmap?

1006

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Un-Answered Questions { Data Structures }

Why is hashmap faster than treemap?

910

How to get largest and smallest number in an array?

1005

How many sorting are there in data structure?

879

What are different types of sorting algorithms?

1001

How can you add an item to the beginning of the list?

1012

What is the difference between static and dynamic data?

991

What are priority queues?

966

How is bubble sort done?

846

How do you find the complexity of a bubble sort?

844

What is a Stack? Explain with example?

966

Which is the parent class of deque class?

929

How to sequentially represent max-heap?

927

Explain pre-order and in-order tree traversal.

947

Which type of memory allocation is referred for linked list?

1193

Why quicksort is called quick?

908

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