Python Quiz

Which of the following is a correct way to define a variable in Python?

• variable 1 = 10

• var = 10

• 10 = var

• var @ 10

Answer explanation

In Python, the correct way to define a variable is by using the format 'var = value'. Therefore, 'var = 10' is the correct choice out of the options provided.

What will be the output of the following code snippet? python Copy code x = 5 y = 2 print(x / y)

• 2.5

• 2

• 2.0

• 2.2

Answer explanation

The output will be 2.5 because when dividing two integers in Python, the result is a float if there is a remainder.

Which of the following statements is true about Python lists?

• Lists are immutable.

• Lists can contain elements of different data types.

• Lists are indexed starting from 1.

• Lists are a fixed-size collection.

Answer explanation

Lists can contain elements of different data types.

What does the range() function in Python do?

• Generates a list of integers starting from 0 up to a specified number.

• Generates a sequence of numbers.

• Generates a range object.

• All of the above.

Answer explanation

The range() function in Python generates a sequence of numbers, not a list of integers starting from 0 up to a specified number or a range object. Therefore, the correct choice is 'Generates a sequence of numbers.'

How do you check the number of elements in a list my_list in Python?

• len(my_list)

• my_list.size()

• my_list.length()

• count(my_list)

Answer explanation

To check the number of elements in a list in Python, you use the len(my_list) function. This returns the length of the list.

What is the output of the following code snippet? python Copy code my_string = "Hello, World!" print(my_string[3:7])

• lo,

• lo, W

• llo,

• llo, W

Answer explanation

The output of the code snippet is 'lo,' because string slicing in Python starts from the index specified before the colon and goes up to, but does not include, the index specified after the colon.

Which of the following is a correct way to open a file named data.txt for reading in Python?

• open('data.txt', 'r')

• open('data.txt', 'read')

• open('data.txt', 'w')

• open('data.txt')

Answer explanation

The correct way to open a file named data.txt for reading in Python is open('data.txt', 'r'). The 'r' mode stands for read.

What is the purpose of the try-except block in Python?

• To define a new function.

• To handle exceptions and errors.

• To execute a loop.

• To compare two values.

Answer explanation

The purpose of the try-except block in Python is to handle exceptions and errors, providing a way to gracefully manage unexpected situations in code.

Which of the following is a correct syntax to define a function in Python?

• function calculate_sum(a, b):

• def calculate_sum(a, b):

• calculate_sum(a, b) {

• define calculate_sum(a, b)

Answer explanation

The correct syntax to define a function in Python is 'def calculate_sum(a, b):'. The 'def' keyword is used to define a function in Python.

How do you concatenate two lists list1 and list2 in Python?

• list1 + list2

• list1 - list2

• concat(list1, list2)

• merge(list1, list2)

Answer explanation

To concatenate two lists list1 and list2 in Python, you can use the '+' operator like list1 + list2.