Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Chapter: 25
Q421:
What is the space-saving advantage of using Huffman Encoding compared to standard ASCII encoding?
A. It requires more storage space
B. It compresses data by reducing the number of bits per character
C. It cannot be used for compression
D. It increases the overall file size
Correct Answer:
B
Chapter: 26
Q422:
What is the primary use of Huffman encoding?
A. Data encryption
B. Data compression
C. Data encryption and compression
D. Data formatting
Correct Answer:
B
Chapter: 26
Q423:
Who introduced the Huffman encoding algorithm?
A. Claude Shannon
B. David Huffman
C. John McCarthy
D. Donald Knuth
Correct Answer:
B
Chapter: 26
Q424:
In Huffman encoding, how are nodes with the lowest frequency handled?
A. They are ignored until the end
B. They are combined to form new nodes
C. They are assigned higher priority
D. They are removed from the tree
Correct Answer:
B
Chapter: 26
Q425:
How many bits does the Huffman code for the letter 'e' use in the given example?
A. 3
B. 4
C. 5
D. 6
Correct Answer:
A
Chapter: 26
Q426:
What is the length of the encoded message compared to ASCII encoding in the example?
A. The same
B. 20% shorter
C. 40% shorter
D. 54% shorter
Correct Answer:
D
Chapter: 26
Q427:
What is the frequency of the character 'a' in the provided frequency table?
A. 2
B. 3
C. 4
D. 5
Correct Answer:
B
Chapter: 26
Q428:
In Huffman encoding, what is the total frequency of the root node?
A. 33
B. 10
C. 19
D. 14
Correct Answer:
A
Chapter: 26
Q429:
What does the Huffman encoding tree help to achieve in data compression?
A. Decrease file size by adding redundancy
B. Increase file size by adding redundancy
C. Decrease file size by optimizing bit length
D. Increase file size by optimizing bit length
Correct Answer:
C
Chapter: 26
Q430:
How is the frequency of a new node determined in Huffman encoding?
A. It is equal to the sum of the frequencies of its children
B. It is half of the sum of the frequencies
C. It is the average of the frequencies
D. It is the difference between the frequencies
Correct Answer:
A
Chapter: 26
Q431:
What kind of data structure is primarily used in Huffman encoding?
A. Stack
B. Queue
C. Binary tree
D. Graph
Correct Answer:
C
Chapter: 26
Q432:
How many characters were encoded in the example phrase "traversing threaded binary trees"?
A. 32
B. 33
C. 34
D. 31
Correct Answer:
B
Chapter: 26
Q433:
What will happen if the nodes are combined differently in Huffman encoding?
A. The codes for the characters will remain the same
B. The codes for the characters will be different
C. The frequency of the characters will change
D. The tree will not be built correctly
Correct Answer:
B
Chapter: 26
Q434:
What does the receiver need to decode the Huffman encoded message?
A. Only the encoded message
B. The original text message
C. The tree structure used for encoding
D. The frequency table
Correct Answer:
C
Chapter: 26
Q435:
In Huffman encoding, what is the first step in creating the Huffman tree?
A. Assigning codes to each character
B. Listing all characters with their frequencies
C. Combining nodes with the highest frequency
D. Assigning values to tree nodes
Correct Answer:
B
Chapter: 26
Q436:
What type of coding does Huffman encoding use for characters with higher frequency?
A. Shorter codes
B. Longer codes
C. Fixed-length codes
D. Random codes
Correct Answer:
A
Chapter: 27
Q437:
What is the relationship between the number of internal nodes and external nodes in a binary tree?
A. N internal nodes = N+1 external nodes
B. N internal nodes = 2N external nodes
C. N internal nodes = N-1 external nodes
D. N internal nodes = N+1 external nodes
Correct Answer:
D
Chapter: 27
Q438:
How many links are there in a binary tree with N internal nodes?
A. N links
B. 2N links
C. N+1 links
D. N-1 links
Correct Answer:
B
Chapter: 27
Q439:
In a binary tree, if you have 8 internal nodes, how many external nodes are there?
A. 8
B. 9
C. 10
D. 11
Correct Answer:
C
Chapter: 27
Q440:
What is the total number of links in a binary tree with 9 nodes?
A. 8
B. 9
C. 18
D. 17
Correct Answer:
C