Python From Beginner to Advanced

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Quiz
What is an array in Python?
A
A collection of items stored at contiguous memory locations and accessed via indices.
B
A collection that supports items of mixed data types.
C
A mutable sequence of characters.
D
A key-value store similar to a dictionary.
What will be the output of the following code snippet?
from array import array
arr = array('i', [1, 2, 3, 4, 5])
print(arr[2])
A
1
B
2
C
3
D
4
Why would one use an array instead of a list in Python?
A
Arrays are more memory efficient when storing large quantities of elements of the same data type.
B
Arrays can store elements of different data types.
C
Arrays provide faster access to elements than lists.
D
Arrays support more methods than lists.
What will the following code output?
from array import array
arr = array('i', [1, 2, 3, 4, 5])
del arr[2]
print(arr)
A
[1, 2, 3, 5]
B
[1, 2, 4, 5]
C
[2, 3, 4, 5]
D
Error
What is the purpose of the count() method in array operations?
from array import array
arr = array('i', [1, 2, 2, 3])
result = arr.count(2)
print(result)
A
Counts the number of elements in the array
B
Returns the total sum of all elements
C
Counts how many times an element appears in the array
D
None of the above

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