### Python for Data Science NPTEL | Week 1

Session: JAN-APR 2023

Course Name: Python for Data Science

#### Q1. Which of the following is/are the correct ways of naming variables in Python?a. 2_max = 5b. max_2 = 5c. max2 = 5d. max @2 = 5

Q2. What does 5%11 will evaluate to
a. 1
b. 5
c. 0
d. Syntax error

Q3. What does 4//7 evaluate to
a. 0
b. 1
c. 0.0
d. 4

These are NPTEL Python for Data Science Assignment 1 Answers

Q4. What will be the output of the following code snippet?

a. 300
b. 100200
c. ‘100’ + ‘200’
d. ‘100 + 200’

Q5. What will be the output of the following code snippet?

a. 300
b. 100200
c. ‘100’ + ‘200’
d. ‘100 + 200’

Q6. What is the type of the following expression?
1 + 4 / 2

a. int
b. float
c. bool
d. str

These are NPTEL Python for Data Science Assignment 1 Answers

Q7. What is the type of the following expression?
 (1 > 0) and (-1 < 0) and (1 == 1)
a. str
b. bool
c. True
d. False

Q8. What is the output of the following code snippet?

a. 32
b. 44
c. 40
d. 36

Q9. Which of the arithmetic operators given below cannot be used with ‘strings’ in Python?
a. *
b. –
c. +
d. All of the above

Q10. Consider the list of instructions and resulting outputs given below. Pick the set that is incorrect.

a. 4
b. 2
c. 1, 3
d. 1, 3, 4
e. All are correct

Q11. Two variables Xand Y were assigned the following values initially: X = 3 and Y = 6. Which of the following statements will help swap the values between these two variables?
a. Y = X
X = Y
b. X = Y
c. X = Y
Y = X
d. X, Y = Y, X

Answer: d. X, Y = Y, X

These are NPTEL Python for Data Science Assignment 1 Answers

Session: JULY-DEC 2022

Q1. What is the output of the following code?

``````num1 = 12
num2 "58"
print(num1 + num2)``````

a.12

b.58

c.70

d.Error: Invalid operation, unsupported operator ‘+’ used between ‘int’ and ‘str’

2. Given two variables j = 6 and g = 3.3. If both normal division and floor division operators were used to divide j by g, what would be the data type of the value obtained from the operations?

a. int, int
b. float, float
c. float, int
d. int, float

3. Let a = 5 (101 in binary) and b = 3 (011 in binary). Which of the following operations results in the values 7 and 1?

These are NPTEL Python for Data Science Assignment 1 Answers

4. State whether the given statement is True or False.

``When using the floor division operator (//), if the result is negative, then the result is rounded off to the next largest integer.``

a. True
b. False

5. Let x = “50”. Which of the following commands converts the ‘x to float datatype?

a. str(float,x)
b. x.float()
c. float(x)
d. Cannot convert a string to float datatype

6. Which of the following variable names are INVALID in Python?

a. 1_variable
b. variable_1
c. variable_*
d. variable1

These are NPTEL Python for Data Science Assignment 1 Answers

7. Which of the following variable assignments would throw an error?

a. var1=True; var2=False;
b. var1=false; var2=true;
c. var1=’True’; var2=’False’;
d. var1=’true’; var2=’false’;

8. Predict the output of the following code

``````x=4
y-11
p 5.0
ans=x**(y % p)
print(ans)``````

a. 4
b. 4.0
c. 5
d. 4.1

9. The value of the variable result after running the code snippet below is ____

``````num-20.5
z-3
result-2+:*3+num/lz
print(result)``````

a. 89.0

b. 17.0

c. 737.0

d. 96.0

10. Which Python library is commonly used for data wrangling and manipulation?

a. Numpy
b. Pandas
c. scikit
d. Math

These are NPTEL Python for Data Science Assignment 1 Answers

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