Question 17 [Assertion Reasoning] - Sample Paper 1 by Teachoo - Teachoo Sample Paper

Q17 and 18 are ASSERTION AND REASONING based questions. Mark the correct choice as

(a) Both A and R are true and R is the correct explanation for A

(b)Both A and R are true and R is not the correct explanation for A

(c) A is True but R is False

(d)A is false but R is True

Assertion(A): Python supports multiple execution modes

Reasoning(R): Interactive mode allows the user to enter and execute one statement at a time, while script mode allows the user to run a file containing multiple statements.

Answer:

Answer by student

a) Both A and R are true and R is the correct explanation for A.

Detailed answer by teachoo

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Both A and R are true and R is the correct explanation for A is correct because both the assertion and the reasoning are true statements about Python’s execution modes, and the reasoning correctly explains the difference between interactive mode and script mode.

• Python supports multiple execution modes , which means that it can run Python code in different ways depending on the user’s preference or requirement.
• Interactive mode allows the user to enter and execute one statement at a time, while script mode allows the user to run a file containing multiple statements. This gives the user flexibility and convenience to choose the best mode for their purpose.
• The reasoning clearly describes what interactive mode and script mode are, and how they differ from each other. 

For example, if we want to use Python in interactive mode, we can open a terminal or an IDE and type Python commands one by one. The output will be displayed immediately after each command. This mode is useful for testing or debugging small pieces of code.

>>> print("Hello world")

Hello world

>>> x = 10

>>> y = 20

>>> print(x + y)

30

• In this example, we can see that each statement is executed as soon as we press enter, and the result is shown on the next line. We can also see that we can use variables and expressions in interactive mode, as well as built-in functions like print().
• Interactive mode has a special prompt (>>>) that indicates that it is waiting for user input. It also has a secondary prompt (…) that indicates that it is waiting for more input to complete a statement.

If we want to use Python in script mode, we can write a file with a .py extension containing multiple Python statements. The file can be executed as a whole by passing it as an argument to the Python interpreter. This mode is useful for writing larger programs or applications.

# hello.py

print("Hello world")

x = 10

y = 20

print(x + y)

$ python hello.py

Hello world

30

• In this example, we can see that we have written four statements in a file named hello.py. The first line is a comment, which starts with a # symbol and is ignored by Python. The other three lines are print statements that display some text or values on the screen.
• To run this file, we need to use a command-line tool like a terminal or a shell, and type python followed by the name of the file. This will invoke the Python interpreter and execute all the statements in the file in order. The output will be shown on the screen after the file is executed.
• Script mode does not have any prompt or indication that it is waiting for user input. It simply runs the file from start to end.

So, the correct answer is a) Both A and R are true and R is the correct explanation for A.

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