MCQ | Random Scan and Raster Scan in Computer Graphics

Multiple choice questions and answers (MCQ) based on the random scan and raster scan in computer graphics with 4 choices, correct answer and explanation.
Submitted by Monika Sharma, on October 12, 2020

Question 1: What are Random scan and Raster scan techniques?

  1. Techniques to display an image on the screen
  2. Line Drawing Techniques
  3. Polygon Drawing Techniques
  4. None of the above

Answer: a. Techniques to display an image on the screen

Explanation:

The Random scan and rater scan are the display techniques using which (any one) an image is displayed on the screen.


Question 2: Which among the following is best suited for a smooth line drawing on the screen?

  1. Random Scan Display Algorithm
  2. Raster Scan Display Algorithm
  3. Both a. and b.
  4. None of the above

Answer: a. Random Scan Display Algorithm

Explanation:

The Random scan display algorithm is best suited for line drawing because it uses an electron beam which operates like a pencil to create a line on the screen.


Question 3: Which among the following is best suited for a realistic shaded image drawing on the screen?

  1. Random Scan Display Algorithm
  2. Raster Scan Display Algorithm
  3. Both a. and b.
  4. None of the above

Answer: b. Raster Scan Display Algorithm

Explanation:

The Raster scan display algorithm is best suited for realistic shaded drawing because it is works upon the intensity of the pixels. Hence, the value of every pixel is assigned from the starting pixel to the ending one. Hence, a shaded realistic image can be best drawn using this technique.


Question 4: Which of the following options is correct in accordance with the Random Scan Display Algorithm?

  1. It is best suited for line drawing algorithm.
  2. It has a high resolution.
  3. It has an electron beam which strikes only that part of the screen where the drawing is needed.
  4. All of the above

Answer: d. All of the above

Explanation:

All the given options are correct in accordance to the random scan display technique in a Cathode Ray tube.


Question 5: Which among the following are the types of scanning or travelling of beam in a raster scan display technique?

  1. Interlaced Scanning
  2. Non- Interlaced Scanning
  3. Spiral Scanning
  4. All of the Above

Answer: c. Spiral Scanning

Explanation:

There is no scanning technique such as spiral scanning in the rater scan display technique.







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