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Python Arrays
Question 1
Which of the following is the correct way to create an array in Python using the array module?
- A
arr = [1, 2, 3]
- B
arr = array.array('i', [1, 2, 3])
- C
arr = array('i', [1, 2, 3])
- D
arr = {1, 2, 3}
Question 2
What is the output of the following code?
from array import array
arr = array('i', [1, 2, 3, 4, 5])
print(arr[0])
- A
0
- B
1
- C
5
- D
Error
Question 3
Which of the following methods is used to add an element to the end of an array?
- A
insert()
- B
append()
- C
extend()
- D
add()
Question 4
What will be the output of the following code?
from array import array
arr = array('i', [1, 2, 3])
arr.insert(1, 4)
print(arr)
- A
array('i', [1, 4, 2, 3])
- B
array('i', [4, 1, 2, 3])
- C
array('i', [1, 2, 3, 4])
- D
Error
Question 5
What does the index method do in an array?
- A
Returns the last occurrence of a specified value
- B
Inserts a value at a specified position
- C
Returns the index of the first occurrence of a specified value
- D
Removes an element at a specified position
Question 6
How to create an empty array of integers in Python using the array module?
- A
arr = array.array('i')
- B
arr = array.array('i', [])
- C
Both a and b
- D
None of the above
Question 7
What does the following code print?
from array import array
arr = array('i', [1, 2, 3])
arr[1] = 5
print(arr)
- A
array('i', [1, 2, 3])
- B
array('i', [5, 2, 3])
- C
array('i', [1, 5, 3])
- D
Error
Question 8
What is the result of the following code?
from array import array
arr1 = array('i', [1, 2, 3])
arr2 = array('i', [4, 5])
arr1 += arr2
print(arr1)
- A
array('i', [1, 2, 3, 4, 5])
- B
array('i', [4, 5, 1, 2, 3])
- C
array('i', [1, 2, 3, 9, 10])
- D
Error
Question 9
What is the time complexity of accessing an element in an array by index?
- A
O(n)
- B
O(log n)
- C
O(1)
- D
O(n^2)
Question 10
Which of the following operations is not allowed on a Python array?
- A
Accessing an element by index
- B
Slicing
- C
Adding elements of different types
- D
Iterating through elements
There are 10 questions to complete.