Unit 1 Digital Information Review 2024

Front

Which of these values can be stored in a single bit?
Options:
light switch,
current temperature,
4 directions (i.e. north, south, east & west),
months of the year

Back

light switch

Answer explanation

A single bit can represent two states, such as on/off or true/false. A light switch fits this definition, as it can be either on (1) or off (0). The other options require more than one bit to represent multiple values.

Front

What is the minimum number of bits that can represent the accessibility options in the Apple iPhone settings menu?

Back

3

Answer explanation

Each option has an on or off, so each option requires 1 bit. 3 options each needing 1 bit. Therefore 3 bits are needed.

Front

Which of the below are binary digits? A binary digit is 1 of ten values (0-9), A binary digit is 1 of two values (0-1), A binary digit is ten values of (0-9), A binary digit is two values of (0-1)

Back

A binary digit is 1 of two values (0-1)

Answer explanation

A binary digit, or bit, represents one of two values: 0 or 1. Therefore, the correct choice is 'A binary digit is 1 of two values (0-1)', as it accurately defines the concept of binary digits.

Front

If I have 4 bits how many different numbers may I represent?

Back

16

Answer explanation

With 4 bits, you can represent 2^4 different combinations. This equals 16, as each bit can be either 0 or 1, leading to 16 unique numbers from 0000 to 1111 in binary.

Front

Which of the following is a single byte of digital information?
Each choice is expressed in binary.
1
1001100101001
01011010
1001

Back

01011010

Answer explanation

A single byte consists of 8 bits. The correct choice, 01011010, is 8 bits long. The other options either have fewer bits (1 and 1001) or more bits (1001100101001), making them not a single byte.

Front

Your programmer friend told you that they just turned 11110 years old, in binary. How old are they in decimal?

Back

30

Answer explanation

11110

2⁴ * 1 + 2³ * 1 + 2² * 1 + 2¹ * 1 + 2⁰ * 0 = 16 + 8 + 4 + 2 + 0 = 30

Front

What decimal number does the binary 11010 represent?

Back

26

Answer explanation

11010

2⁴ * 1 + 2³ * 1 + 2² * 0 + 2¹ * 1 + 2⁰ * 1 = 16 + 8 + 2 = 26

Front

What binary number should you look for on the door of room 13?

Back

00001101

Answer explanation

13 = 2³ + 2² + 2⁰

¹¹⁰¹

Front

What is the binary representation of the decimal number 44?

Back

101100, 00101100, 0010 1100, 00101100, 10 1100

Answer explanation

44 = 2⁵ + 2³ + 2²

101100

Front

Which of these lists correctly orders the binary numbers from smallest to largest? 00010101, 00010001, 00100111, 01001000

Back

00010001, 00010101, 00100111, 01001000

Answer explanation

00010001 = 17

00010101 = 21

00100111 = 39

01001000 = 72