Question 4 - Sample Paper 2 by Teachoo - Teachoo Sample Paper

What will be the output of the following Python code?

x = 3.14

y = 2

z = x // y

print(z)

A) 1.0

B) 1.57

C) 1

D) 0.0

Answer:

Answer by student

A) 1.0

Detailed answer by teachoo

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• An expression is a combination of values, variables, operators and functions that produces a result when evaluated. For example, x // y is an expression that performs floor division on the values of x and y and returns the quotient.
• A statement is an instruction that tells the computer to perform a specific action. For example, print(z) is a statement that displays the value of z on the screen.
• Type conversion is the process of changing the data type of a value from one type to another. For example, int(x) is a type conversion that converts the value of x from float to integer.
• Input/output is the process of taking data from the user or displaying data to the user. For example, input() is a function that takes data from the user as a string, and print() is a function that displays data to the user as a string.

Let’s look at each option and see why they are correct or incorrect.

A) 1.0

• This option is correct because it matches the output of the code. The code first assigns the values 3.14 and 2 to the variables x and y respectively. Then it performs floor division on x and y using the operator // , which returns the largest integer less than or equal to the quotient . Since x and y are of different types (float and int), Python converts them to a common type (float) before performing the operation . Therefore, z becomes 1.0, which is the largest integer less than or equal to 3.14 / 2 . Finally, print(z) displays 1.0 on the screen.

B) 1.57

• This option is incorrect because it does not match the output of the code. The code does not perform regular division on x and y using the operator /, which would return 1.57 as the quotient. Instead, it performs floor division on x and y using the operator //, which returns 1.0 as the quotient.

C) 1

• This option is incorrect because it does not match the output of the code. The code does not perform integer division on x and y using the operator //, which would return 1 as the quotient. Instead, it performs floor division on x and y using the operator //, which returns 1.0 as the quotient.

D) 0.0

• This option is incorrect because it does not match the output of the code. The code does not perform floor division on y and x using the operator //, which would return 0.0 as the quotient. Instead, it performs floor division on x and y using the operator //, which returns 1.0 as the quotient.

So, the correct answer is A) 1.0.

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