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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.

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