Midterm Review

Question 1

What does the motherboard do?

Answer 1

Houses and connects all of the computer’s components together

Question 2

What does the hard drive do?

Answer 2

Holds all the user’s data

Question 3

What is the name of the component that processes everything? (the brain of the computer)

Answer 3

The CPU or Central Processing Unit

Question 4

What is the software?

Answer 4

Makes the computer useful. Allows the user to interact with the computer by using the software

Question 5

What is the software stack model?

Answer 5

1. Hardware
2. OS kernel
3. OS apps
4. Apps

Question 6

How is the software stack model useful?

Answer 6

Each level performs its duties without the user having to think about it.

Question 7

What is an algorithm?

Answer 7

High level instructions that someone can implement to perform a task on a computer

Question 8

How is an algorithm related to a program and how is program different?

Answer 8

Algorithms are used to construct programs. However, algorithms can be instructions on how to do anything

Question 9

What is a program’s UI?

Answer 9

How nice the interface looks

Question 10

What a program’s UX?

Answer 10

The experience the user has when interacting with it

Question 11

What is a metaphor?

Answer 11

A way to explain a complex concept in a simple way

Question 12

How are metaphors useful in software design?

Answer 12

They are a familiar way to explain some new technology and developers need to be able to make their software easy to use for people

Question 13

What is lossy compression?

Answer 13

Data in the file is lost due to compression

Question 14

What is lossless compression?

Answer 14

The full file without any loss in data

Question 15

How are colors represented in a pixel?

Answer 15

3 colors. RGB

Question 16

How many bits do we need per pixel?

Answer 16

24 bits

Question 17

What is the RGB value of #FFFFFF?

Answer 17

White;

RGB(255,255,255)

Question 18

What color is #00FF00?

Answer 18

Green

Question 19

How many samples per second in a 16000 Hx encoding?

Answer 19

16000

Question 20

How do you solve this problem? What is the size in bytes of a 24000 Hz signal with 16 bit sampling resolution for a 40 second recording?

Answer 20

You just multiply everything and then to find the amount of bits you just divide by 8

Question 21

How many transistors do you need to represent 15?

Answer 21

4 (2 to the 4th is 16 )

Question 22

How do you search for an exact phrase in a search engine?

Answer 22

Put quotes around your token

Question 23

How do you exclude a token in your web search?

Answer 23

Add a dash before the token

Question 24

What does this search come up with?

mathematics (quantum OR “linear algebra”)

Answer 24

Every page that is associated with mathematics AND is associated with either quantum OR contains the phrase “linear algebra”

Question 25

What is an IP address?

Answer 25

An internet protocol address is an address that is assigned to every device that is participating in a network

Question 26

What is TCP and what is it used for?

Answer 26

Transmission Control Protocol enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent.

Question 27

What is the domain name system?

Answer 27

The domain name system gives common easy to remember names to IP addresses so that a user can input them into the internet

Question 28

What is the network of networks?

Answer 28

The internet

Question 29

What device is used to connect networks together?

Answer 29

Routers