Python for Data Science | NPTEL | Week 2 Answers

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Python for Data Science NPTEL Week 2 Answers

Q1. Consider a variable job = “chemist”. Which of the following expressions will retrieve the last character from the variable value?

a) job[7]
b) job[len(job) – 1]
c) job[5:6]
d) job[- 1]
e) All of the above statements are true

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Q2. Which of the following expressions should be used to assign the variable get_num to get the final print statement output as value 75 from the below tuple?

nst_tup = ("System", (60, 75, 45), (15, 3, 12))
get_num =
print(get_num)

a) nst_tup[1][2]
b) nst_tup[1:2][1]
c) nst_tup[1][1]
d) nst_tup[1:2](1)
e) None of the above

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Q3. What would be the output for the following set of statements?

new_list = [13, 23, 18, 64, 51]
new_list[4] = True
print(new_list)

a) [13, 23, 18, 64, 51, “True”]
b) [13, 23, 18, 64, True]
c) [13, 23, 18, 64, 51, True]
d) Index Error

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Q4. What result does the final statement print?

scores = (12, 25, 32, 39, 44)
f_score, *bw_s, l_score = scores
print("Output is :", f_score, "and", bw_s, "and", l_score)

a) Output is: 12, (25, 32, 39), 44
b) Output is: 12 and (25, 32, 39) and 44
c) Output is: 12 and 25 and 39
d) ValueError: Too many values to unpack
e) Output is: 12 and [25, 32, 39] and 44

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Python for Data Science NPTEL Week 2 Answers

Q5. When the following set of instructions are executed, how many times does the vowel “e” appear in the result?

word = "occurrence"
for ltr in range(len(word)):
    if ltr % 3 == 0:
        print(word[ltr])

a) 1
b) “e” is not printed
c) 2
d) 4
e) None of the above

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Q6. Which of the following options, when executed, will result in a tuple?

a) t = (2,2)
b) y =[‘h’,’4′,’3′]
c) r = (‘v’,)
d) s = (‘w’)
e) All except b

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Q7. Which statement/ statements will result in an empty data structure?

a) dict1 = {}
b) tup1 = ()
c) st1 = set()
d) toy = “baseball”
gt_str = toy[2:2]
print(“Output:”, gt_str)
e) All of the above

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Python for Data Science NPTEL Week 2 Answers

Q8. Consider a dictionary city created with the following keys and values.

city = {'Delhi':3, 'Bengaluru':5, 'Chennai':4, 'Kolkata':6, 'Mumbai':7}

Through which all possible way / ways can we access the value 5 from the dictionary city?

a) city[‘Bengaluru’]
b) city.get[‘Bengaluru’]
c) city.values()[1]
d) list(city.values())[1]
e) None of the above

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Q9. Count the number of elements in the below list.

list_tens = [["October", 24, ["2021"]]]

a) 2
b) 1
c) 3
d) 0
e) None of the above

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Q10. A data structure is defined as celebrate = set(‘Nativity Day’). What are the possible outputs if celebrate is printed?

1. {‘v’, ‘N’, ‘t’, ‘i’, ‘y’, ‘a’, ‘D’}
2. {‘v’, ‘N’, ‘t’, ‘I’, ‘y’, ‘a’, ‘D’, ‘ ‘}
3. {‘v’, ‘N’, ‘t’, ‘i’, ‘y’, ‘a’, ‘D’, ‘ ‘}
4. {‘v’, ‘t’, ‘i’, ‘y’, ‘a’, ‘D’, ‘ ‘, ‘N’}

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

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Python for Data Science NPTEL Week 2 Answers

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