Page 148 - Touhpad Ai

1. Assertion (A): Statistics show that 35% of Amazon’s revenue comes from using recommendation engines.
Reason (R): The recommendation engine behaves like a smart and experienced salesperson who understands
the user’s needs, tastes, and requirements and can make informed decisions about recommendations that
are beneficial and relevant to the customer's needs thereby increasing the buying rate.
Ans. a.
2. Assertion (A): A matrix with equal numbers of rows and columns is called a square matrix.

Reason (R): A square matrix is a matrix where all the elements are equal to each other.
Ans. c.
Statement-based questions:
Direction: Questions 3-4, two statements are given: Statement 1 and Statement 2. Examine the statements and
mark the correct option:

a. Statement 1 is true, Statement 2 is true
b. Statement 1 is false, Statement 2 is false
c. Statement 1 is true, Statement 2 is false
d. Statement 1 is false, Statement 2 is true
3. Statement 1: The number of columns in a matrix determines how many rows it has.

Statement 2: A matrix is said to be square if it has the same number of rows and columns.
Ans. d.
4. Statement 1: Feature vectors help represent data points numerically in machine learning.
Statement 2: Vectors are not useful in calculating distances or similarities between data points.

Ans. c.

Unsolved Questions
SECTION A (Objective Type Questions)
AI QUIZ
A. Tick (ü) the correct option.

1. Which of the following is a null vector?
a. (1, 0) b. (0, 0)
c. (1, 1) d. (0, 1)

2. The union of sets A = {1, 2} and B = {2, 3} is:
a. {1, 2} b. {2, 3}
c. {1, 2, 3} d. {2}

3. Which of these represents a scalar quantity?

a. Velocity b. Force
c. Temperature d. Displacement

4. A feature vector is used in AI to:
a. Store images c. Represent data numerically
b. Write code d. Save files

146 Touchpad Artificial Intelligence - XI