Python Programming Basics

How do you declare a variable in Python?

• variable_name = value

• declare variable_name

• value = variable_name

• variable = value

Answer explanation

In Python, you declare a variable by assigning a value to it using the syntax variable_name = value.

What is the purpose of if-else statements in Python?

• To conditionally execute code based on specified conditions.

• To randomly choose which block of code to execute

• To skip executing the code inside the else block

• To always execute the code inside the if block

Answer explanation

To conditionally execute code based on specified conditions.

Explain the usage of the print function in Python.

• The print function in Python is used to display output on the console.

• The print function in Python is used to define functions.

• The print function in Python is used to read input from the user.

• The print function in Python is used to perform mathematical calculations.

Answer explanation

The print function in Python is used to display output on the console.

How do you take user input in Python?

• Use the print() function in Python.

• Use the write() function in Python.

• Use the input() function in Python.

• Use the read() function in Python.

Answer explanation

Use the input() function in Python to take user input.

How can you comment out a line in Python?

• Add a '#' symbol at the beginning of the line

• Use a '//' at the end of the line

• Enclose the line in /* */

• Insert '//' at the beginning of the line

Answer explanation

To comment out a line in Python, you should add a '#' symbol at the beginning of the line. This symbol indicates that the line is a comment and will not be executed.

What is the purpose of a 'for' loop in Python?

• To conditionally execute code based on specified conditions.

• To iterate over a sequence of elements.

• To define a function in Python.

• To skip executing the code inside the loop.

Answer explanation

To iterate over a sequence of elements.

What is the purpose of the 'len()' function in Python?

• To calculate the length of a string or list.

• To perform mathematical calculations.

• To define a variable in Python.

• To skip executing the code inside the function.

Answer explanation

The purpose of the 'len()' function in Python is to calculate the length of a string or list, making it the correct choice among the options provided.

What is the output of the following code?

print(2 + 3 * 4)

• 20

• 14

• 12

• 24

Which of the following is a valid variable name in Python?

• 1variable

• variable_1

• variable-1

• variable 1

How do you start a comment in Python?

• //

• #

• /*

• <!--