9th Grade - IT Programming - 2nd Cycle Exam

What is the correct way to start a Python program?

• start()

• begin

• def main():

• print("Hello, World!")

Answer explanation

The correct way to start a Python program is by defining a main function using 'def main():'. This sets up a structured entry point for the program, which is a common practice in Python programming.

Which of the following is the correct way to comment in Python?

• /* comment */

• # comment

• // comment

• -- comment

Answer explanation

In Python, comments are made using the '#' symbol. This is the correct way to comment, as opposed to other languages like C or Java, which use '/* comment */' or '// comment'. Therefore, '# comment' is the right choice.

What is the correct syntax to assign the value 10 to a variable x in Python?

• x = 10

• 10 = x

• var x = 10

• x == 10

Answer explanation

The correct syntax to assign a value in Python is 'x = 10'. This means 'x' is the variable and '10' is the value being assigned. The other options are incorrect: '10 = x' is invalid, 'var x = 10' is not Python syntax, and 'x == 10' is a comparison.

Which data type is used to store whole numbers in Python?

• float

• int

• str

• bool

Answer explanation

In Python, the 'int' data type is used to store whole numbers, while 'float' is for decimal numbers, 'str' is for strings, and 'bool' is for boolean values. Therefore, the correct choice is 'int'.

How do you define a floating-point number in Python?

• float(3)

• 3.0

• 3.00

• 3

Answer explanation

A floating-point number in Python can be defined using a decimal point. Among the options, '3.0' is the correct representation of a floating-point number, while '3' is an integer. 'float(3)' is a function call, and '3.00' is also valid but less common.

What is the result of the expression 3 + 4.5?

• 7

• 7.5

• 34.5

• Error

Answer explanation

To solve 3 + 4.5, simply add the two numbers together. 3 is an integer and 4.5 is a decimal. The sum is 7.5, making it the correct answer.

Which data type is used to store a sequence of characters in Python?

• int

• str

• list

• set

Answer explanation

In Python, the 'str' data type is used to store a sequence of characters, making it the correct choice. Other options like 'int', 'list', and 'set' serve different purposes and do not specifically represent character sequences.

What will be the output of `print(type(5))`?

• <class: 'int'>

• Error

• Integer

• 5

How would you convert an integer to a string in Python?

• str(5)

• int(5)

• float(5)

• toString(5)

Answer explanation

To convert an integer to a string in Python, you use the str() function. For example, str(5) will return '5' as a string. The other options do not perform this conversion.

Which of the following is a valid Python variable name?

• 1x

• x1

• x-1

• 1-x

Answer explanation

In Python, variable names must start with a letter or underscore and can contain letters, numbers, and underscores. 'x1' is valid as it starts with a letter. '1x', 'x-1', and '1-x' are invalid due to starting with a number or using a hyphen.