Quiz 02.01

Which of the following is the correct binary representation of the number 2?

• 110

• 101

• 11

• 10

Given the numerical value 1010101.11, which of the following number systems is MOST likely represented?

• Hexadecimal

• Octal

• Binary

• Decimal

How many bits are in a single byte?

• 4

• 8

• 12

• 16

Which of the following is the best definition of a bit?

• A measure of computer graphics and sound

• An electrical signal in a wire

• A single 1 or 0 in a digital signal

• A physical signal that becomes a digital signal

Arrange the following from smallest to largest.

1.Kilobyte

2.Terabyte

3.Gigabyte

4.Megabyte

You will need to enter select the right numeric order

• 1,2,3,4

• 1,4,2,3

• 1,4,3,2

• 2,4,1,3

A consumer wants to add a hard drive to their computer to store video from their camera. Which of the following would represent the storage capacity of a modern hard disk drive (HDD) purchased from a computer store?

• 4 Gigabytes

• 8 Megabytes

• 1,024 Kilobytes

• 3 Terabytes

Which of the following transfer rates is the FASTEST?

• 1.24 Gbps

• 1,282 Kbps

• 181 Mbps

• 1,480 Mbps

Which of the following BEST describes what a kilobyte is a measurement of?

• CPU speed

• Storage space

• Data throughput

• Power level

Answer explanation

Data storage usually refers to the number of bytes. Storage space on a disk is measured in kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB).

Throughput, or data transmission from one computer to another, usually refers to the number of individual bits that can be transmitted in one second. Throughput is measured in kilobits per second (Kbps), megabits per second (Mbps), and gigabits per second (Gbps).

The base unit of measure for CPU speed is hertz (Hz) and is recorded in kilohertz (kHz), megahertz (MHz), and gigahertz (GHz). These units of measure refer to the number of CPU cycles per second, or the number of times per second the processor can write data to memory or read data from memory.

Power & sleep options are used to regulate how much electricity a computer system consumes. They determine how long your computer can be idle before turning off the screen or putting it into a low-power sleep mode.

Which of the following encoding schemes would MOST likely be used to represent an emoji?

• ASCII

• Unicode

• Hexadecimal

• Binary

Answer explanation

Unicode is an international 16-bit encoding standard and is capable of representing millions of different characters with enough space for every character from every human language. Developers have even started assigning Unicode values to pictures, called emoji.

ASCII is short for American Standard Code for Information Interchange. It is the most common format for plain text files, where each character is represented by a unique 7-bit binary code. Extended ASCII uses an 8-bit binary code and allows for some international characters, but not emoji.

Hexadecimal is a numbering system that uses sixteen digits, 0 through 9, and A through F. Binary is a numbering system that uses two digits, 0 and 1. Binary and hexadecimal are NOT encoding schemes.

Match each feature to whether it influences audio quality.

• Frame Rate

• Color Depth

• Bit Depth

• Resolution

• Sampling Rate