Question 8 - Sample Paper 1 by Teachoo - Teachoo Sample Paper

What will be the output of the following code:

x = 10

y = 5

if x > y:

  x = x + y

  y = x - y

  x = x - y

else:

  x = x * y

  y = x / y

  x = x / y

print(x, y)

Options:

a. 5 10 

b. 10 5 

c. 50 1 

d. 1 50

Answer:

Answer by student

a. 5 10

Detailed answer by teachoo

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To find the output of the code, we need to follow the flow of control and execute each statement according to the indentation and the condition. For example, to execute the code, we can do the following:

• First, we assign x = 10 and y = 5
• Then, we check the condition x > y, which is True, so we enter the if block
• In the if block, we execute three statements:
• x = x + y, which assigns x = 10 + 5 = 15
• y = x - y, which assigns y = 15 - 5 = 10
• x = x - y, which assigns x = 15 - 10 = 5
• After the if block, we print x and y, which are now 5 and 10 respectively

Let’s discuss each option and see why they are correct or incorrect:

a. 5 10

This is the correct output of the code, because it matches the values of x and y after executing the if block. The if block swaps the values of x and y using arithmetic operations.

b. 10 5

This is the incorrect output of the code, because it is the original values of x and y before entering the if block. The code swaps the values of x and y using arithmetic operations.

c. 50 1

This is the incorrect output of the code, because it is the result of executing the else block, which is not entered in this case. The else block is only executed when the condition x > y is False. The else block swaps the values of x and y using multiplication and division operations.

d. 1 50

This is the incorrect output of the code, because it is the result of swapping x and y in the else block, but with a different order of operations. The else block swaps x and y using multiplication and division operations.

So, the correct answer is a. 5 10.

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