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Data Structures Interview Questions
Questions Answers Views Company eMail

Why null is allowed in hashmap?

877

What is the quickest sorting algorithm?

943

Why is sorting necessary?

878

What is stable sort example?

869

Which sorting algorithm is used in arrays sort?

889

Which sorting algorithm is used in collections sort?

824

What is the use of sorting?

956

What is selection sort with example?

976

What is the difference between hashmap and arraylist?

1009

Why is sorting important?

869

Which is the slowest sorting algorithm?

940

Why is bubble sort stable?

847

Why is quicksort so fast?

885

What is difference between hashset and treeset?

1052

Which sorting algorithm is the slowest?

857


Post New Data Structures Questions

Un-Answered Questions { Data Structures }

what is the primary advantage of a linked list?

1346


Now you are given an array of a characters (both ASCII and Kanji) and, an index into the array. The index points to the start of some character. Now you need to write a function to do a backspace (i.e. delete the character before the given index).

929


What is the minimization factor and time complexity of b-tree?

1151


Which sorting algorithm is used in arrays sort?

889


Why is sorting and classifying important?

835


Is array immutable?

905


What is difference between list and linked list?

949


Does linkedhashset allow null values?

993


Differentiate between hashmap and hashtable.

1113


What are skew trees? For a tree with 4 nodes draw all possible binary? Generalize for n nodes how many binary trees can be drawn?

1032


What is inplace sorting?

1068


What are all the classes and interfaces that are available in the collections?

855


What happens if an array goes out-of-bounds?

1085


What are the standard ways in which a graph can be traversed?

973


How does variable declaration affect memory allocation?

1758