1D and 2D Arrays in Python

How do you declare a 1D array in Python?

• arr = [1, 2, 3, 4, 5]

• arr = (1, 2, 3, 4, 5)

How do you access the third element in a 1D array named 'arr' in Python?

• arr.get(3)

• arr(2)

• arr[3]

• arr[2]

How can you modify the second element in a 1D array named 'arr' to have a value of 5 in Python?

• arr.insert(1, 5)

• arr.pop(1, 5)

• arr[2] = 5

• arr[1] = 5

What is a 2D array in Python?

• A 2D array in Python is a single list with nested elements.

• A 2D array in Python is a list of lists.

How do you access the element in the second row and third column of a 2D array named 'matrix' in Python?

• matrix[1][2]

• matrix(1, 2)

• matrix[2][3]

How can you change the value of the element in the first row and second column of a 2D array named 'matrix' to 10 in Python?

• matrix[0][1] = 10

• matrix[0,1] = 10

• matrix[0][2] = 10

• matrix[1][0] = 10

What is the process of traversing a 2D array called in Python?

• Nested loop iteration

• Array sorting

• Array concatenation

• Array filtering

What is the output of the following Python code? arr = [1, 2, 3, 4] print(arr[2])

• 1

• 4

• 3

• 2

What is the output of the following Python code? matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] print(matrix[1][2])

• 4

• 5

• 7

• 6

What is the output of the following Python code? arr = [5, 6, 7, 8] arr[1] = 10 print(arr)

• [5, 10, 10, 8]

• [5, 6, 7, 10]

• [5, 6, 10, 8]

• [5, 10, 7, 8]