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Trie Questions

Home > Technical Aptitude > Data Structures > Trie > General Questions
NA
SHSTTON
9
Solv. Corr.
17
Solv. In. Corr.
26
Attempted
0 M:0 S
Avg. Time

11 / 19

Choose the correct option.

Can the two edges that are coming out of a node have labels of string beginning with the same character?


ATRUE

BFALSE

Answer: Option B

Explanation:

It is a compressed search tree or prefix tree in which keys contain the suffix of text values as the text position. All the nodes (internal) except for the root nodes have at least two children. No two edges that are coming out of a node have labels of string beginning with the same character.

Workspace

NA
SHSTTON
8
Solv. Corr.
24
Solv. In. Corr.
32
Attempted
0 M:0 S
Avg. Time

12 / 19

Choose the correct option.

Which of the following data clustering algorithm uses suffix tree in search engines?


AWeiner’s algorithm

BFarach’s algorithm

CLempel – Ziv – Welch’s algorithm

DSuffix Tree Clustering

Answer: Option D

Explanation:

The concept of Suffix Tree was introduced by Weiner in 1973. Ukkonen provided the first online contribution of Suffix. Farach gave the first suffix tree contribution for all alphabets in 1997. Suffix Tree Clustering is a data clustering algorithm that uses suffix tree in search engines.

Workspace

NA
SHSTTON
5
Solv. Corr.
23
Solv. In. Corr.
28
Attempted
0 M:0 S
Avg. Time

13 / 19

Choose the correct option.

What is a time complexity for finding the total length of all string on all edges of a tree?


AƟ (n)

BƟ (n!)

CƟ (1)

DO (n2)

Answer: Option D

Explanation:

To check if a substring is present in a string of a length of n, the time complexity for such operation is found to be O (n). The time complexity for finding the total length of all string on all edges of a tree is O (n2).

Workspace

NA
SHSTTON
7
Solv. Corr.
19
Solv. In. Corr.
26
Attempted
0 M:0 S
Avg. Time

14 / 19

Choose the correct option.

For what size of nodes, the worst case of usage of space in suffix tree seen?


An Nodes

B2n Nodes

C2n nodes

Dn! nodes

Answer: Option C

Explanation:

In computer science, the worst case of usage of space in a suffix tree is found to be for a Fibonacci word for a full 2n nodes. The time complexity for usage of space is found to be O (n).

Workspace

NA
SHSTTON
10
Solv. Corr.
15
Solv. In. Corr.
25
Attempted
0 M:0 S
Avg. Time

15 / 19

Choose the correct option.

What is a time complexity for inserting an alphabet in the tree using hash maps?


AO (log n!)

BO (n!)

CO (n2)

DO (1)

Answer: Option D

Explanation:

Suffix tree is also known as PAT tree or position tree. It allows fast string operation. Total time taken for construction of suffix tree is linear to the length of the tree. The time complexity for inserting an alphabet in the tree using hash maps is constant, O (1).

Workspace

NA
SHSTTON
3
Solv. Corr.
19
Solv. In. Corr.
22
Attempted
0 M:0 S
Avg. Time

16 / 19

Choose the correct option.

Who among the following provided the first suffix tree contribution for all alphabet?


AWeiner

BFarach

CUkkonen

DAlexander Morse

Answer: Option B

Explanation:

The concept of Suffix Tree was introduced by Weiner in 1973. Ukkonen provided the first online contribution of Suffix tree which had the time complexity of the fastest algorithm of that period. Farach gave the first suffix tree contribution for all alphabets in 1997.

Workspace

NA
SHSTTON
6
Solv. Corr.
17
Solv. In. Corr.
23
Attempted
0 M:0 S
Avg. Time

17 / 19

Choose the correct option.

Who among the following algorithm is used in external memory and compression of the suffix tree?


AWeiner’s algorithm

BFarach’s algorithm

CUkkonen’s algorithm

DAlexander Morse

Answer: Option B

Explanation:

The concept of Suffix Tree was introduced by Weiner in 1973. Ukkonen provided the first online contribution of the Suffix tree. Farach gave the first suffix tree contribution for all alphabets in 1997. Farach’s algorithm is used in external memory and compression.

Workspace

NA
SHSTTON
8
Solv. Corr.
14
Solv. In. Corr.
22
Attempted
0 M:0 S
Avg. Time

18 / 19

Choose the correct option.

Which statement is correct of suffix tree with a string of length n?


AThe tree has n leaves.

BThe tree has n roots

CHeight of Tree is n

DDepth of tree is n

Answer: Option A

Explanation:

In computer science, a suffix tree is also known as PAT tree or position tree. It is a compressed search tree or prefix tree in which keys contain the suffix of text values as the text position. For a string of length n, the suffix tree has leaves equal to n.

Workspace

NA
SHSTTON
8
Solv. Corr.
16
Solv. In. Corr.
24
Attempted
0 M:0 S
Avg. Time

19 / 19

Choose the correct option.

Do all the nodes have at least two children in suffix tree.


ATRUE

BFALSE

Answer: Option B

Explanation:

It is a compressed search tree or prefix tree in which keys contain the suffix of text values as the text position. All the nodes (internal) except for the root nodes have at least two children.

Workspace

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