Python Quiz

What is a variable in Python?

• A fixed value that cannot be changed

• A named location in memory that stores data

• A type of function

• A method to print data

Answer explanation

A variable in Python is a named location in memory that stores data, allowing you to reference and manipulate that data throughout your program. This distinguishes it from fixed values or functions.

Which of the following is an example of an integer in Python?

• 3.14

• "Hello, World!"

• True

• -3

Answer explanation

In Python, an integer is a whole number without a decimal point. Among the options, -3 is the only integer, while 3.14 is a float, "Hello, World!" is a string, and True is a boolean. Thus, -3 is the correct answer.

What data type in Python represents logical values?

• int

• float

• str

• bool

Answer explanation

In Python, the 'bool' data type is used to represent logical values, specifically 'True' and 'False'. Other types like 'int', 'float', and 'str' serve different purposes and do not represent logical values.

Which of the following is an example of a string in Python?

• 5

• 3.14

• "Hello, World!"

• False

Answer explanation

In Python, a string is defined by enclosing text in quotes. "Hello, World!" is a string because it is surrounded by double quotes. The other options are a number (5), a float (3.14), and a boolean (False), not strings.

What does it mean that Python is dynamically typed?

• You must declare the type of a variable before using it

• The type of a variable is determined at runtime

• Variables cannot change type once assigned

• Python does not support different data types

Answer explanation

Being dynamically typed means that the type of a variable is determined at runtime, allowing for flexibility in variable assignments. This is why the correct answer is that the type of a variable is determined at runtime.

Which of the following is the correct way to declare an integer variable in Python?

• age = "30"

• age = 30.0

• age = 30

• age = True

Answer explanation

The correct way to declare an integer variable in Python is 'age = 30'. This assigns the integer value 30 to the variable 'age'. The other options either assign a string, a float, or a boolean, which are not integers.

What data type is the variable 'height' in the example script?

height = 5.3

• Integer

• Float

• String

• Boolean

Answer explanation

The variable 'height' is likely a measurement that can have decimal values, making it a float. Integers are whole numbers, strings are text, and booleans represent true/false values, which do not fit the context.

In the example script, what is the value assigned to the variable 'name'?

name = '

• "Jane Doe"

• "John Doe"

• "Doe John"

• "Student"

Answer explanation

The variable 'name' is assigned the value 'John Doe' in the example script, making it the correct choice among the options provided.

Which function is used to print the type of a variable in Python?

• print_type()

• type()

• getType()

• showType()

Answer explanation

The correct function to print the type of a variable in Python is type(). It returns the type of the specified object, making it the appropriate choice among the options provided.

What is the value of the boolean variable 'is_student' in the example script?

• False

• "True"

• True

• "False"

Answer explanation

In the example script, the boolean variable 'is_student' is set to True, indicating that the correct answer is 'True'. The other options are either string representations or incorrect boolean values.