Intro to Programming Quiz

What is the result of the following arithmetic operation in Python?

• 15

• 17

• 19

• 21

Answer explanation

In Python, arithmetic operations follow the order of operations (PEMDAS). So, first, multiplication is performed, resulting in 5 * 3 = 15. Then, the addition operation is performed with the result of the multiplication and 2, resulting in 15 + 2 = 17.

Which of the following statements regarding variables in Python is true?

• Variable names can include spaces.

• Variables cannot be overridden with a new value.

• Variables need to start with a number or special character.

• Variables are useful for storing and accessing values in a program.

Answer explanation

Variables in Python are used to store and manipulate data. They provide a way to label data with a descriptive name so that it can be referenced and used throughout a program. Variables can hold various types of data, such as numbers, strings, or more complex data structures. They are essential for programming because they enable flexibility and reusability in code.

What is the purpose of the header in a Python function?

• It defines the name of the function and its argument(s).

• It specifies the work that the function does.

• It defines the input variable for the function.

• It prints the output of the function.

Answer explanation

The function header in Python defines the name of the function and its argument(s), if any. It begins with the keyword def, followed by the function name and its argument(s) enclosed in parentheses, and ends with a colon.

What is the purpose of the return statement in a Python function?

• It defines the name of the function and its argument(s).

• It specifies the work that the function does.

• It specifies the input variable for the function.

• It returns the value as the function's output.

Answer explanation

The return statement in a Python function specifies the value that the function should output. It ends the execution of the function and returns control to the calling function, along with the specified value.

Which of the following is not a valid data type in Python?

• Integer

• Float

• Boolean

• Character

Answer explanation

In Python, characters are represented as strings, which are collections of characters enclosed in quotation marks. Characters themselves are not a distinct data type in Python.

What will be the output of the following code snippet?

• 5.333333333333333

• 7.0

• 3.3333333333333335

• 12.0

Answer explanation

The division operation x / y results in approximately 3.3333333333333335, and adding 2 to this value yields approximately 5.333333333333333. Therefore, the correct output is approximately 5.333333333333333, which corresponds to option A.

What does the following code snippet print?

• x is less than 5

• x is greater than 5

• x is less than or equal to 5

• x is greater than or equal to 5

Answer explanation

The condition x < 5 evaluates to False because x is 10, not less than 5. Therefore, the code block under the else statement is executed, which prints "x is greater than or equal to 5".

What will be the output of the following code snippet?

• It's cold

• It's moderate

• It's hot

• It's moderate and hot

Answer explanation

The condition temperature < 20 evaluates to False, so the code block under the elif statement is checked. The condition temperature >= 20 and temperature < 30 evaluates to True because temperature is 25, which falls between 20 and 30. Therefore, the code block under this elif statement is executed, printing "It's moderate".

What function is used to remove an item from a list?

• list.pop()

• list.remove()

• list.delete()

• list.exclude()

Answer explanation

The list.remove() function is used to remove a specific item from a list by specifying the item to be removed within the parentheses.

Which indexing method is used to retrieve the last item of a list?

• list[-1]

• list[last()]

• list.last()

• list.get(-1)

Answer explanation

To retrieve the last item of a list, you can use negative indexing by specifying -1. This retrieves the last item of the list regardless of its length.