Why computers use binary in Intro to Computing - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to show the two states used in binary.

Intro to Computing

binary_states = [[1], 1]

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

ANone

B0

CTrue

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers other than 0 or 1.

Using boolean values like True instead of 0.

Computers use binary which has two states: 0 and 1. Here, 0 represents off and 1 represents on.

2fill in blank

medium

Complete the code to convert a decimal number to binary using built-in function.

Intro to Computing

binary_value = bin([1])

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

A10

B2

C'1010'

D0b10

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string instead of an integer.

Passing a binary string instead of decimal number.

The bin() function converts an integer to its binary representation as a string. The input must be an integer like 10.

3fill in blank

hard

Fix the error in the code to correctly check if a bit is 1.

Intro to Computing

if bit == [1]:
    print('Bit is ON')

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

A1

B"1"

CTrue

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Comparing bit to string "1" instead of number 1.

Using boolean True which may cause unexpected results.

The bit should be compared to the integer 1, not the string "1" or boolean True, to correctly check if it is ON.

4fill in blank

hard

Fill both blanks to create a simple binary AND operation.

Intro to Computing

result = [1] & [2]

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

A0b1010

B0b1100

C0b1000

D0b1111

Attempts:

3 left

💡 Hint

Common Mistakes

Using decimal numbers instead of binary literals.

Using the wrong operator like | instead of &.

The bitwise AND operator & compares each bit of two numbers. Using 0b1010 & 0b1100 results in 0b1000.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping decimal to binary strings for numbers 1 to 4.

Intro to Computing

binary_map = [1]((x, bin(x)) for x in [2](1, [3]))

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

Adict

Brange

C5

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using list instead of dict.

Using wrong range end value causing missing numbers.

This code creates a dictionary where keys are numbers 1 to 4 and values are their binary strings. dict builds the dictionary, range(1, 5) generates numbers 1 to 4.