Why programming automates tasks in Intro to Computing - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message automatically.

Intro to Computing

print([1])

Drag options to blanks, or click blank then click option'

A"Hello, world!"

Bprint

CHello, world!

Dmessage

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the text

Using a variable name without defining it

The print function needs a string inside quotes to display text automatically.

2fill in blank

medium

Complete the code to repeat a task 3 times automatically.

Intro to Computing

for i in range([1]):
    print("Task", i + 1)

Drag options to blanks, or click blank then click option'

A3

B5

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 which runs no times

Using 1 which runs only once

The range(3) makes the loop run 3 times, automating the repeated task.

3fill in blank

hard

Fix the error in the code to automate adding two numbers.

Intro to Computing

result = num1 [1] num2
print(result)

Drag options to blanks, or click blank then click option'

A/

B-

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using minus (-) which subtracts

Using multiply (*) or divide (/) which do other operations

The plus sign (+) adds two numbers, automating the addition task.

4fill in blank

hard

Fill both blanks to automate filtering even numbers from a list.

Intro to Computing

evens = [x for x in numbers if x [1] 2 == [2]]

Drag options to blanks, or click blank then click option'

A%

B0

C1

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 instead of 0 for even check

Using == as operator instead of %

The modulus operator (%) finds the remainder. Even numbers have remainder 0 when divided by 2.

5fill in blank

hard

Fill all three blanks to automate creating a dictionary of word lengths for words longer than 3 letters.

Intro to Computing

lengths = [2]: [2] for [3] in words if len({{BLANK_4}}) > 3

Drag options to blanks, or click blank then click option'

Aword

Blen(word)

D{

Attempts:

3 left

💡 Hint

Common Mistakes

Not starting dictionary with '{'

Using wrong variable names

Not checking word length correctly

The dictionary comprehension starts with '{', uses the word as key, and its length as value for words longer than 3 letters.

Practice

1. Why do programmers use programming to automate tasks?

easy

A. To make computers slower

B. To save time and reduce mistakes by repeating tasks automatically

C. To avoid using computers

D. To write tasks only once and never run them

Solution

1. Step 1: Understand the purpose of automation

   Automation helps computers do repeated tasks without human effort.

2. Step 2: Identify benefits of automation

   It saves time and reduces human errors by repeating tasks exactly.

3. Final Answer:

   To save time and reduce mistakes by repeating tasks automatically -> Option B

4. Quick Check:

   Automation = saves time and reduces mistakes [OK]

Hint: Automation means saving time by repeating tasks automatically [OK]

Common Mistakes:

• Thinking automation makes computers slower
• Believing automation avoids using computers
• Confusing automation with never running tasks

2. Which of the following is the correct way to write a simple instruction in programming to print 'Hello'?

easy

A. print('Hello')

B. Print Hello

C. echo 'Hello'

D. say Hello

Solution

1. Step 1: Identify correct syntax for printing in Python

   Python uses print() function with parentheses and quotes for strings.

2. Step 2: Compare options

   Only print('Hello') uses correct Python syntax: print('Hello').

3. Final Answer:

   print('Hello') -> Option A

4. Quick Check:

   Correct print syntax = print('Hello') [OK]

Hint: Python print uses print() with quotes around text [OK]

Common Mistakes:

• Missing parentheses in print statement
• Using capital P in print
• Using commands from other languages

3. What will be the output of this code?

for i in range(3):
    print(i)

medium

A. 0 1 2

B. 1 2 3

C. 0 1 2 3

D. 3 2 1

Solution

1. Step 1: Understand range(3) in the loop

   range(3) generates numbers 0, 1, 2 for the loop variable i.

2. Step 2: Trace the print output for each iteration

   Each loop prints i: first 0, then 1, then 2 on separate lines.

3. Final Answer:

   0 1 2 -> Option A

4. Quick Check:

   range(3) = 0,1,2 [OK]

Hint: range(n) counts from 0 up to n-1 [OK]

Common Mistakes:

• Thinking range(3) starts at 1
• Including 3 in output
• Reversing the order of numbers

4. Find the error in this code that tries to automate printing numbers 1 to 3:

for i in range(1, 4)
    print(i)

medium

A. print should be capitalized

B. Wrong range values

C. Indentation is not needed

D. Missing colon ':' after for loop statement

Solution

1. Step 1: Check syntax of for loop

   Python requires a colon ':' at the end of the for loop line.

2. Step 2: Identify missing colon error

   The code misses ':' after range(1, 4), causing syntax error.

3. Final Answer:

   Missing colon ':' after for loop statement -> Option D

4. Quick Check:

   For loops need ':' at end [OK]

Hint: For loops always end with ':' in Python [OK]

Common Mistakes:

• Ignoring missing colon error
• Changing range values unnecessarily
• Capitalizing print incorrectly

5. You want to automate sending a greeting message to 5 friends. Which programming approach best automates this task?

medium

A. Send the greeting only to one friend and copy it manually

B. Write the greeting 5 times manually for each friend

C. Write the greeting once and use a loop to send it to each friend

D. Ask each friend to send the greeting to themselves

Solution

1. Step 1: Understand automation with loops

   Using a loop lets the program repeat sending the greeting to all friends automatically.

2. Step 2: Compare options for automation

   Write the greeting once and use a loop to send it to each friend describes using a loop to send once-written greeting to all friends, which is automation.

3. Final Answer:

   Write the greeting once and use a loop to send it to each friend -> Option C

4. Quick Check:

   Loop repeats tasks automatically [OK]

Hint: Use loops to repeat tasks instead of manual repetition [OK]

Common Mistakes:

• Writing code multiple times instead of looping
• Manual copying instead of automation
• Relying on others to do the task