Quiz 2 Python - Minggu Cabaran Digital

What is the output of the following code?

x = 10

y = 2

print(x ** y)

• 20

• 5

• 100

• 12

Answer explanation

The ** operator in Python is used to calculate the power of a number. in this code, ' 10 ' raised to the power of ' 2 ' is ' 10 * 10 ', which equals 100. Therefore, the output of the print() function will be ' 100 '.

12. What function is used to convert a data type from string to integer?

• int()

• str()

• float()

• bool()

Answer explanation

The int() function converts a string or another number type to an integer.

13. How do you get the last element in a list my_list?

• my_list[0]

• my_list[-1]

• my_list[len(my_list)]

• my_list[last]

Answer explanation

In Python, you can access elements in a list using index numbers. The first element in a list has an index of 0, the second element has an index of 1, and so on. To access the last element in a list, you can use the index -1. This is because the index -1 refers to the last element in the list, -2 refers to the second-to-last element, and so on.

14. What is the correct way to import the ' math ' module in Python?

• import math

• import Math

• include math

• using math

Answer explanation

The ' import ' statement is used to import the math module. Also, In Python, module names are typically written in lowercase letters, with words separated by underscores if necessary.

15. What does the ' // ' operator mean in Python?

• Regular division

• Division with remainder

• Integer (floor) division

• Modulus division

Answer explanation

The // operator performs integer division and returns the largest integer less than or equal to the division result.

16. What is the output of the following code?

a = [1, 2, 3]

b = a

b.append(4)

print(a)

• [1, 2, 3]

• [1, 2, 3, 4]

• Error

• [1, 2]

Answer explanation

In Python, assigning b = a means that b refers to the same list object as a. Thus, any modification to b also affects a.

What is the output of the following code?

x = [1, 2, 3]

x.append([4, 5])

print(len(x))

• 3

• 4

• 5

• 6

Answer explanation

Here's an explanation of what the code does:

1. 1. The variable x is assigned a list with three elements: [1, 2, 3].

2. 2. The append() method is called on the list referenced by x, adding a new list [4, 5] to the end of the list.

3. 3. The len() function is called on the list referenced by x, which returns the number of elements in the list.

Since the list [4, 5] is a single element in the list x, the length of the list x is 4. Therefore, the output of the code is 4.

18. How do you write a single-line comment in Python?

• /* This is a comment */

• // This is a comment

• # This is a comment

• <-- This is a comment -->

Answer explanation

Comments in Python are written using the # symbol.

19. What does the ' range(5) ' function do in Python?

• Generates a list with elements [0, 1, 2, 3, 4]

• Generates a list with elements [1, 2, 3, 4, 5]

• • Generates a list with elements [5, 4, 3, 2, 1]

• Generates a list with elements [0, 2, 4, 6, 8]

Answer explanation

The range(5) function generates a sequence of numbers starting from 0 up to, but not including, 5.

What is the output of the following code?

for i in range(3):

print(i)

• 0 1 2

• 1 2 3

• 0 1 2 3

• 1 2 3 4

Answer explanation

• The range(3) function generates a sequence of numbers from 0 up to, but not including, 3.