Python Interactive Mode vs Script Mode - Practice Questions

Challenge - 5 Problems

❓ Predict Output

intermediate

Output difference between interactive and script mode

Consider this Python code snippet run in interactive mode and script mode. What is the output in each mode?

Python

x = 5
x + 3

A Interactive mode: 8\nScript mode: 8

B Interactive mode: (no output)\nScript mode: 8

C Interactive mode: 5\nScript mode: 8

D Interactive mode: 8\nScript mode: (no output)

💡 Hint

In interactive mode, expressions are automatically printed. In script mode, only explicit print statements show output.

In interactive mode, typing 'x + 3' evaluates and prints 8 automatically. In script mode, without print(), no output appears.

🧠 Conceptual

intermediate

Behavior of variable persistence

Which statement correctly describes variable persistence in Python interactive mode vs script mode?

A Variables persist in both interactive and script mode after execution ends.

B Variables reset after each command in interactive mode but persist in script mode.

C Variables persist across commands in interactive mode but reset each time a script runs.

D Variables never persist in either mode.

💡 Hint

Think about how interactive mode keeps the session alive.

Interactive mode keeps variables alive during the session. Script mode runs fresh each time, so variables reset.

❓ Predict Output

advanced

Output of code with print in script mode

What is the output when running this code as a script?

Python

def greet():
    return 'Hello'

print(greet())

A None

B Hello

C greet

D (no output)

💡 Hint

Look at what print() does with the function return value.

The function returns 'Hello', and print() outputs it to the console.

❓ Predict Output

advanced

Output difference with print in interactive mode

What is the output when running this code in interactive mode?

Python

def greet():
    return 'Hello'

greet()

A 'Hello'

B Hello

C (no output)

D None

💡 Hint

Interactive mode shows the return value of expressions.

In interactive mode, the return value of greet() is shown as a string with quotes.

🧠 Conceptual

expert

Why script mode is preferred for programs

Why is script mode generally preferred over interactive mode for running complete Python programs?

A Because script mode allows saving and reusing code easily, while interactive mode is temporary.

B Because interactive mode runs code faster than script mode.

C Because script mode automatically prints all expressions without print().

D Because interactive mode cannot define functions.

💡 Hint

Think about code reuse and persistence.

Script mode lets you save code in files and run anytime, making it better for programs. Interactive mode is for quick tests.

Practice

1. What is the main difference between Python interactive mode and script mode?

easy

A. Interactive mode is slower than script mode.

B. Interactive mode runs files; script mode runs commands one by one.

C. Interactive mode runs commands one by one; script mode runs a whole file at once.

D. Script mode shows results immediately after each command.

Solution

1. Step 1: Understand interactive mode behavior

   Interactive mode lets you type and run one command at a time and see the result immediately.

2. Step 2: Understand script mode behavior

   Script mode runs a saved file with many lines of code all at once, not line-by-line interactively.

3. Final Answer:

   Interactive mode runs commands one by one; script mode runs a whole file at once. -> Option C

4. Quick Check:

   Interactive = one command, Script = whole file [OK]

Hint: Interactive = one command; script = whole file run [OK]

Common Mistakes:

• Confusing which mode runs commands one by one
• Thinking script mode shows immediate results after each line
• Believing interactive mode runs whole files

2. Which of the following is the correct way to start Python in interactive mode from a terminal?

easy

A. python script.py

B. python

C. python -i script.py

D. python run script.py

Solution

1. Step 1: Identify command to start interactive mode

   Typing python alone in the terminal starts Python in interactive mode.

2. Step 2: Understand other options

   python script.py runs a script, python -i script.py runs script then interactive, and python run script.py is invalid syntax.

3. Final Answer:

   python -> Option B

4. Quick Check:

   Just type python to start interactive mode [OK]

Hint: Type 'python' alone to start interactive mode [OK]

Common Mistakes:

• Using 'python script.py' to start interactive mode
• Confusing flags like -i without understanding
• Typing invalid commands like 'python run script.py'

3. What will be the output if you run this code in interactive mode line by line?

print('Hello')
2 + 3
print('Done')

medium

A. Hello\nDone

B. Hello\n3\nDone

C. Hello\nNone\nDone

D. Hello\n5\nDone

Solution

1. Step 1: Analyze print statements in interactive mode

   print('Hello') outputs Hello immediately. print('Done') outputs Done immediately.

2. Step 2: Understand expression evaluation in interactive mode

   Typing 2 + 3 alone in interactive mode shows 5 as output.

3. Final Answer:

   Hello\n5\nDone -> Option D

4. Quick Check:

   Only print outputs show in script; interactive shows expression results [OK]

Hint: Only print() shows output in script; expressions show in interactive [OK]

Common Mistakes:

• Expecting expression results printed in script mode
• Confusing expression output with print output
• Thinking 2 + 3 prints 5 without print()

4. You run a Python script file but get no output, even though it has print statements. What is a likely cause?

medium

A. You forgot to save the script file before running it.

B. You typed commands one by one instead of running the file.

C. You ran the script in interactive mode instead of script mode.

D. You used print statements incorrectly.

Solution

1. Step 1: Check how script files run

   Script mode runs the saved file. If the file is not saved, changes won't run.

2. Step 2: Understand why no output appears

   If you forgot to save, the old file runs without new print statements, so no output.

3. Final Answer:

   You forgot to save the script file before running it. -> Option A

4. Quick Check:

   Unsaved file runs old code, no new output [OK]

Hint: Always save script files before running [OK]

Common Mistakes:

• Confusing interactive mode with script mode
• Thinking typing commands one by one runs script
• Assuming print statements are always wrong

5. You want to test a small piece of code quickly before adding it to your program. Which mode should you use and why?

hard

A. Use interactive mode because it lets you try commands one by one immediately.

B. Use interactive mode because it saves your code automatically.

C. Use script mode because it shows output after each line automatically.

D. Use script mode because it runs the whole program faster.

Solution

1. Step 1: Identify purpose of testing small code

   Testing small code quickly means running commands one by one and seeing results immediately.

2. Step 2: Match mode to purpose

   Interactive mode allows typing and running commands one at a time and seeing output immediately, perfect for quick tests.

3. Final Answer:

   Use interactive mode because it lets you try commands one by one immediately. -> Option A

4. Quick Check:

   Interactive mode = quick command testing [OK]

Hint: Interactive mode is best for quick command tests [OK]

Common Mistakes:

• Thinking script mode runs commands one by one
• Believing script mode shows output after each line automatically
• Assuming interactive mode saves code automatically