Why algorithms are step-by-step solutions in Intro to Computing - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to show the first step in an algorithm to add two numbers.

Intro to Computing

result = num1 [1] num2

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

A-

B+

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

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

The plus sign (+) is used to add two numbers step-by-step.

2fill in blank

medium

Complete the code to show the next step: checking if the result is greater than 10.

Intro to Computing

if result [1] 10:
    print('Result is large')

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' will check if result is less than 10, which is not what we want here.

The '>' symbol checks if the result is greater than 10, which is a step in decision-making.

3fill in blank

hard

Fix the error in the step that repeats printing numbers from 1 to 5.

Intro to Computing

for i in [1](1, 6):
    print(i)

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

Alist

Bloop

Carray

Drange

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'list' or 'array' will cause errors because they don't generate sequences like 'range'.

The 'range' function generates numbers from 1 to 5 step-by-step, which is needed for the loop.

4fill in blank

hard

Fill both blanks to create a step-by-step filter for even numbers in a list.

Intro to Computing

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

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

A%

B0

C1

D//

Attempts:

3 left

💡 Hint

Common Mistakes

Using '//' instead of '%' will do floor division, not remainder.

The '%' operator finds the remainder, and '0' means the number is even if remainder is zero.

5fill in blank

hard

Fill both blanks to create a dictionary of word lengths for words longer than 3 letters.

Intro to Computing

lengths = {: {BLANK_2}} for [2] in words if len({{BLANK_3}}) > 3

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

Aword

Blen(word)

D{

Attempts:

3 left

💡 Hint

Common Mistakes

Not using curly braces will cause syntax errors.

The dictionary starts with '{', keys are words, values are their lengths using len(word).