Practice Introduction To Huffman Codes (21.1) - Greedy Algorithms: Huffman Codes

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What do Huffman Codes optimize?
Show hintHide hint
Think about how data is transmitted.
Question 2.
What is a prefix code?
Show hintHide hint
Consider what happens when decoding.
3Question 3.
What is the primary function of Huffman Codes?
- To create fixed length codes
- To assign variable length codes based on frequency
- To encrypt data
Show hintHide hint
Remember the goal of encoding.
4Question 4.
True or False: Prefix codes can create ambiguities in the encoding process.
- True
- False
Show hintHide hint
What happens when two codes share a prefix?
Question 5.
Construct a Huffman encoding tree for the characters 'a', 'b', 'c', and 'd' with frequencies 0.15, 0.30, 0.25, and 0.30 respectively. What coding will you assign to each character?
Show hintHide hint
Combine the two characters with lowest frequency first.
Question 6.
Given a sentence, analyze it to determine character frequencies. Create an optimal Huffman code, outlining the steps taken in your process.
Show hintHide hint
Frequency count is key before moving to coding.

4 more questions in this section. Enroll free to practise them all.