Python for Data Science Week 1 NPTEL Assignment Answers 2025

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✅ Subject: Python for Data Science
📅 Week: 1
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Python for Data Science Week 1 Assignment Answers 2025

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

• 1_variable
• variable_1
• variable1
• variable#

Answer : For Answers Click Here 

2. Which of the following operators have lower precedence than “not” in Python?

• +
• and
• ==
• |

Answer :

3. What will be the output of the following code?
a = 10
b = 5
p r i n t ( a ∗∗ b % 3 )

• 0
• 100
• 1
• 2

Answer :

4. What will be the output of the following code snippet?
g r e e t i n g s = ”Namaste”
g r e e t i n g s_1 = f l o a t ( g r e e t i n g s )
p r i n t ( type ( g r e e t i n g s_1 ) )

• int
• float
• str
• Code will throw an error.

Answer :

5. 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?

• int, int
• float, float
• float, int
• int, float

Answer : For Answers Click Here

6. What will be the output of the following code snippet?
a = ”10”
b = f l o a t ( a ) + 5
r e s u l t = s t r ( b ) + ”123”
p r i n t ( type ( r e s u l t ) )

• <c l a s s ’ f l o a t ’>
• <c l a s s ’ s t r ’>
• <c l a s s ’ i n t ’>
• The code will give an error.

Answer :

7. What will be the output of the following code snippet?
a = 15
b = 3
c = 4
r e s u l t = a + b ∗ c // ( c % b ) − 5
p r i n t ( r e s u l t )

• 20
• 1
• 22
• 0

Answer :

8. What is the output of the following code snippet?
a = 4
b = 5
a ∗= b ∗ 2
p r i n t ( a )

• 10
• 20
• 25
• 40

Answer :

9. What is the output of the following code snippet?
a = 3
b = 5
c = ( a == 3 ) and ( b == 5 ) o r ( a != 3 )
p r i n t ( c )

• True
• False
• Error

Answer :

10. Let a = 5 (101 in binary) and b = 3 (011 in binary). What is the result of the following operation?
a = 5
b = 3
p r i n t ( a & b )

• 3
• 7
• 5
• 1

Answer : For Answers Click Here

NPTEL Python for Data Science Week 1 Assignment Answers 2024

Q1. What is the output of the following code?

pythonCopyEditprint(3 * "12")

• a. 36
• b. 121212
• c. 123
• d. Error: Invalid operation, unsupported operator ‘*’ used between ‘int’ and ‘str’

Answer:- b
Explanation: The * operator when used between an integer and a string in Python repeats the string. So 3 * "12" gives "121212".

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Q2. What is the output of the following code?

pythonCopyEditprint(-3 // 2)

• a. -1
• b. -2
• c. -1.28
• d. 1.28

Answer:- b
Explanation: The // operator performs floor division. -3 // 2 results in -2 because floor division rounds down to the nearest integer.

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Q3. Consider the following code snippet. What is the data type of y?

pythonCopyEditx = 10
y = str(x)

• a. int
• b. float
• c. str
• d. Code will throw an error

Answer:- c
Explanation: str(x) converts the integer value 10 to a string "10", so y becomes a string.

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Q4. Which of the following variable names are INVALID in Python?

• a. 1_variable
• b. variable_1
• c. variable1
• d. variable#

Answer:- a d
Explanation: Variable names cannot start with a digit (like 1_variable) and cannot contain special characters like #.

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Q5. While naming the variable, use of any special character other than underscore (_) will throw which type of error?

• a. Syntax error
• b. Key error
• c. Value error
• d. Index error

Answer:- a
Explanation: Using unsupported special characters in variable names leads to a syntax error at the time of code interpretation.

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Q6. Let x = "Mayur". Which of the following commands converts x to float datatype?

• a. str(float, x)
• b. x.float()
• c. float(x)
• d. Cannot convert a string to float data type

Answer:- d
Explanation: You cannot convert non-numeric strings like "Mayur" to a float. Doing so will raise a ValueError.

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Q7. Which Python library is commonly used for data wrangling and manipulation?

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

Answer:- b
Explanation: Pandas is the most popular library for data manipulation and wrangling in Python.

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Q8. Predict the output of the following code.

pythonCopyEditprint(int(35/3))

• a. 12.0
• b. 12
• c. 11.667
• d. 11

Answer:- b
Explanation: 35 / 3 results in 11.666..., and int() truncates the decimal part, returning 11.

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Q9. 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

Answer:- b
Explanation: j / g and j // g both return float values when dividing an int by a float.

---

Q10. Let a = 5 (binary 101) and b = 3 (binary 011). What is the result of the following operation?

pythonCopyEditprint(a & b)

• a. 3
• b. 7
• c. 5
• d. 1

Answer:- d
Explanation: a & b performs bitwise AND. 101 & 011 = 001, which equals 1.