Computer Quiz 1 Study Guide

hexadecimal system uses the letters

A and F to represent the numbers 10-15.

How many values can a binary digit store? Choose 1 answer:

A binary digit can store one of two values (0 or 1).

Bit

A contraction of "Binary Digit". A bit is the single unit of information in a computer, typically represented as a 0 or 1.

Binary Data

A data unit with only two possible states: 0 or 1, up or down, on or off, etc... but represented with 1s and 0s

In the decimal system,

each digit represents a power of 101010—the ones' place, the tens' place, etc. We call 101010 the base of the decimal system.

In the hexadecimal system,

each digit represents a power of 16

A byte

is a unit of digital information that consists of 8 of those bits.

The audio recording program Renoise displays values in hexadecimal so that it can display more information to users in a small space. For example, here are the first 4 samples from a song: TimeVolumePanningDelay007F1A3F017E1B3F027E1B3F037D1B3F The computer represents those values as binary numbers, since computers ultimately represent all values as binary. What is the binary equivalent of the volume 3F3Fstart text, 3, F, end text? Choose 1 answer:

00111111

Which of the following is a single byte of digital information?

01010001

Here's how to count to 10 in hexadecimal:

1,2,3,4,5,6,7,8,9,A

When writing binary data, we often put a space between each byte to make it easier for humans to read. Consider this binary data: 10110110101100011011011010110001 Which option puts a space after each byte? Choose 1 answer:

10110110 10110001

The Hexadecimal base is

16

In the RGB color scheme, each color is specified in terms of its red, green, and blue components, using a 2-digit hexadecimal number for each. Here are a few examples: RGBcolorFF0000red00FF00green0000FFblue RGB is an additive color system, so FFFFFF is white and 000000 is black: Whenever all the digits are equal, the RGB color is a shade of gray, because no color is stronger than another. Which of these lists have the shades of gray sorted correctly from lightest (first) to darkest (last)?

FFFFFF, BBBBBB, AAAAAA, 999999, 111111, 000000

An Apple Mac computer includes a status menu with various indicators:Which of the indicators could represent a single bit of information? 👁️Note that there are 2 answers to this question.

Note that there are 2 answers to this question. Choose 2 answers:Choose 2 answers: The bluetooth status (disconnected/connected) The bluetooth status can only be one of two values, so it could represent a single bit of information (disconnected = 0, connected = 1). (Choice E, Checked, Correct) The source of power (battery/adapter) CORRECT (SELECTED) The source of power (battery/adapter) The source of power can only be one of two values, so it could represent a single bit of information (battery = 0, adapter

example: How many bytes long is this binary sequence? 10111001110110110110100100110101011111111011100111011011011010010011010101111111

There are 5 groups of 8 in the sequence, so it is 5 bytes long.

example: How many bits are in 8 bytes of information?

There are 8 bits in a byte. To figure out how many bits are in 8 bytes, we can just multiply: 8×8=64 times, 8, equals, 64. Thus, there are 64 bits in 8 bytes.

example: Which of these values can be stored in a single bit? Choose 1 answer:

Which of these values can be stored in a single bit? Choose 1 answer:

A Single Bit

can only represent two different values

A sequence of three bits

can represent eight 2(3) -exponent

A sequence of two bits

can represent four 2(2)- exponent

Another way to calculate the number of bytes

is to count the total number of bits and divide by 8. There are 40 bits total, and 40 divided by 8 is 5, so it is 5 bytes long.

bytes to bits conversion calculation

multiply by 8 to convert from bytes to bits

A bit is

the smallest piece of information in a computer, a single value storing either 0 or 1.

How many bits are in 2 bytes?

16 bits

Each device that can be connected to a network has an associated Media Access Control (MAC) address. Those addresses are typically printed on the actual device, using hexadecimal notation for each number in the address. Every MAC address is made up of 6 sets of 2-digit hexadecimal numbers. Here's an example: D5-BE-E9-8D-44-9C What's the maximum number of devices that can have unique MAC addresses? Choose 1 answer:

16(12)-exponent

example: The Apple iPhone includes a settings menu where you can toggle various accessibility options on or off: What is the minimum number of bits that can represent those 2 options?

2 bits require 2 options

Convert the hexadecimal number 1E, into decimal:

30 How to solve: Let's start by writing the powers of 16 that each digit represents: Now we need to remember what number is represented by the letter E In hexadecimal, the numbers greater than 9 are represented by the letters A F in that order. Thus, the letter E represents the decimal number 14. we can add up what each place represents. There's a 1 in the sixteens' place and 14 in the ones' place, so that's (1×16)+(14×1)(1×16)+(14×1)left parenthesis, 1, times, 16, right parenthesis, plus, left parenthesis, 14, times, 1, right parenthesis, or 16+14 plus, 14. so the answer is 30

Consider this sequence of bits: 1100001111110011111110111000000111000011111100111111101110000001 How many bytes long is that sequence of bits? Choose 1 answer:

4

A byte represents

different types of information depending on the context. It might represent a number, a letter, or a program instruction. It might even represent part of an audio recording or a pixel in an image.

Conversion between bits and bytes is a simple calculation:

divide by 8 to convert from bits to bytes

What is the base of the binary system?

each digit represents a digit o 2

A sequence

can represent many things: a number, a character, a pixel.