Reg No ١ Name
APJ ABDUL கக பபப UNIVERSITY

Third Semester MCA (2 Year) Degree Examination December 2021

Course Code: 20MCA201
Course Name: DATA SCIENCE AND MACHINE LEARNING

Max. Marks: 60 Duration: 3 Hours

PART A
Answer all questions, each carries3 marks. Marks
pt What is data science and w hy do we need data science? (3)
[ அ Explain the different types of data. G)
5 Explain the differences between Supervised and unsupervised machine learning (3)
algorithms.
க. What are the strengths and weaknesses of K-NN algorithm (3)
9 How to simplify a decision tree by pruning. (3)
‏ہچ‎ Explain the Ordinary Least Square method in regression. (3)
ಜು Define activation function. Give two examples. (3)
> What is maximum margin hyperplane? (3)
9 What is K-fold cross validation? (3)
ಗೌ Explain bootstrap sampling (3)
PART 0
Answer any one question from each module. Each question carries 6 marks.
Module I
ச்‌ Explain the various processes for preparing a dataset to perform a data science (6)
task.
OR

സ The tensile strength in megapascals for 15 samples of tin were determined and (6)
found to be: 34.61, 34.57, 34.40, 34.63, 34.63, 34.51, 34.49, 34.61, 34.52, 34.55,

34.58, 34.53, 34.44, 34.48 and 34.40. Calculate the mean and standard deviation

from the mean for these 15 values, correct to 4 significant figures.

Module 11
pe Based on the survey conducted in an institution the students are classified based (6)

on the 2 attributes academic excellence and other achievements. Consider the

data set given. Find the classification of a student with value of X is 5 and Y is 7

Page 1 of 4