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// Data Structures
Data Structures Quiz
// question 1 of 10
What is a dictionary key?
A loop variable
Unique identifier
A list item
// question 2 of 10
What is printed? d={""x"":10}
x
print(d[""x""])
10
// question 3 of 10
What is printed? print(type(()))
<class 'tuple'>
<class 'list'>
<class 'dict'>
// question 4 of 10
What happens if missing dictionary key is accessed?
KeyError
0
None
// question 5 of 10
What is printed? print([x for x in range(3)])
[1,2,3]
[0,1,2,3]
[0,1,2]
// question 6 of 10
What is printed? print([x for x in ""abc""])
[""abc""]
abc
[""a"",""b"",""c""]
// question 7 of 10
What is printed? a=[1,2,3]
2
1
print(a[1])
// question 8 of 10
What is printed? print({x for x in [1,1,2]})
{1,1,2}
[1,2]
{1,2}
// question 9 of 10
What is printed? print((1,2) * 2)
(2,4)
(1,2,1,2)
Error
// question 10 of 10
What is printed? print(len([]))
None
1
0
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