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?

1042

Which is the parent class of deque class?

980

Can we add heterogeneous elements into treemap?

1013

Treemap orders the elements on which field?

966

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

957

Which is the parent class of linkedhashset class?

960

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

1001

Can we override compareto method for enumerations?

1053

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

1207

What is the difference between list, set and map?

1028

Which is the parent class of linkedlist class?

1108

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

888

Which are the sorted collections?

996

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

976

What are the Differences between map and hashmap?

1065

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Un-Answered Questions { Data Structures }

How many types of data structures are used?

1028

What is a binary search tree? Explain with example?

957

How does a dynamic array work?

933

What is the use of heap sort?

886

How can avl tree be useful in all the operations as compared to binary search tree?

893

What do you mean by sorting?

916

How many sorting algorithms are there?

1052

What is the minimum number of nodes in an avl tree of height h?

932

Can you declare an array without assigning the size of an array?

1176

What is data type in data structure?

1126

Which is better selection or bubble sort?

918

What sorting algorithm should be used for sorting strings?

982

Which is the parent class of hashmap class?

1217

Describe the level term in a tree.

970

Why is waste sorting important?

1017

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