Week 1 QUIZ
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Other
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University
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Practice Problem
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Medium
Vidhi Saxena
Used 3+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does df.groupby('Department').mean() do?
Groups rows by Department and shows row count
Filters only numeric columns
Groups data by Department and calculates mean of each group
None of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you filter rows where column Age > 30 in a DataFrame df?
df[df['Age'] > 30]
df['Age'] > 30
df.select('Age' > 30)
df.filter(Age > 30)
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
command returns the shape of an array arr
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is list comprehension equivalent of:
[i*i for i in range(5)]
[i*i if i in range(5)]
(i*i for i in range(5))
map(lambda i: i*i, range(5))
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
function returns evenly spaced numbers in given range inclusive of both.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the output of the following code?
def extendList(val, lst=[]):
lst.append(val)
return lst
list1 = extendList(10)
list2 = extendList(123, [])
list3 = extendList('a')
print(list1)
print(list2)
print(list3)
[10], [123], ['a']
[10, 'a'], [123], [10, 'a']
[10, 'a'], [123], ['a']
[10], [123], [10, 'a']
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the output?
a = [1, 2, 3]
b = a
a += [4, 5]
print(a)
print(b)
[1,2,3,4,5], [1,2,3]
[1,2,3,4,5], [1,2,3,4,5]
[1,2,3], [1,2,3]
Error
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