Abstraction (focusing on what matters) in Intro to Computing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a simple function that hides details and shows only the result.

Intro to Computing

def add_numbers(a, b):
    return a [1] b

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

A/

B-

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' will subtract instead of add.

Using '*' or '/' will multiply or divide, not add.

The function adds two numbers using the '+' operator, hiding the addition details inside the function.

2fill in blank

medium

Complete the code to call the function and print the result, focusing on what matters.

Intro to Computing

result = add_numbers(5, 3)
print([1])

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

A5 + 3

Bresult

Cadd_numbers

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Printing the function name instead of the result.

Printing the expression directly instead of the stored result.

We print the variable 'result' which holds the output of the function, abstracting away the addition details.

3fill in blank

hard

Fix the error in the function to properly abstract the calculation.

Intro to Computing

def multiply_numbers(a, b):
    result = a [1] b
    return result

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

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' or '-' will add or subtract instead of multiply.

Using '/' will divide instead of multiply.

The function should multiply the two numbers using '*', hiding the multiplication details inside.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that abstracts word lengths greater than 4.

Intro to Computing

{word [1] '_length': len(word) for word in words if len(word) [2] 4}

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

A**

B>

C<

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' will select shorter words.

Using '**' is for power, not needed here.

The '+' operator concatenates the word with '_length' to create descriptive keys, and '>' filters words longer than 4 letters, focusing on important details.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that abstracts uppercase keys and filters positive values.

Intro to Computing

result = { [1]: [2] for k, v in data.items() if v [3] 0 }

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

Ak.lower()

Bv

C>

Dk.upper()

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'k.lower()' changes keys to lowercase.

Using '<' filters negative values instead.

The keys are converted to uppercase with 'k.upper()', values are kept as 'v', and only positive values are included using '>'. This abstracts the details and focuses on what matters.