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C. Competency-based/Application-based questions:
The following question consists of two statements: Assertion (A) and Reason (R).
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.
Answer the question selecting the appropriate option given below:
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the correct explanation of A
c. A is true but R is false
d. A is false but R is true
Ans. a
Unsolved Questions
SECTION A (Objective Type Questions)
uiz
A. Tick ( ) the correct option.
1. are used in the training of machine learning algorithms.
a. Determinants b. Set theory
c. Vectors d. Mean
2. The number of properties or features in a dataset is referred to as the of the dataset.
a. Mean b. Median
c. Mode d. Dimension
3. In the frequency domain, the intervals between samples are known as .
a. histogram b. frequency bins
c. bar graph d. line of best fit
4. Standard deviation is a statistic that measures the degree of of a data set relative to its average.
a. dispersion b. skewness
c. nearness d. concentration
5. does not analyze the individual values in the data set but provides a complete summary of the
entire data.
a. Statistics b. Central tendency
c. Mean d. Median
B. Fill in the blanks.
1. The is the most widely used measure of central tendency and is generally considered the best
measure.
2. The represents how far the data in your sample are grouped around the mean.
3. join returns all records from the right table, and the matching records from the left table.
Maths for AI 193

