Comp Sci Ch. 1 Notes

Question 0

What was the first computer?

Answer 0

Eniac

Question 1

Who was the first programmer?

Answer 1

Ada Lovelace

Question 2

Why was the eniac built?

Answer 2

To help the allies in WWII

Question 3

Had the eniac been out off, what would happen to modern computers?

Answer 3

We wouldn’t have them

Question 4

Analog is ____

Digital is ____

Answer 4

Continuous, finite

Question 5

What does a pit represent on a cd?

Answer 5

A 1

Question 6

What does the smooth area of a cd represent?

Answer 6

A 0

Question 7

How does RGB make colors?

Answer 7

It has 1-255 numbers for each shade of a color

Question 8

Why do we use binary?

Answer 8

It is cheap and reliable

Question 9

What doubles with every new bit?

Answer 9

The total possible

Combinations

Question 10

What increases with the usage of more bits?

Answer 10

The accuracy of the end product

Question 11

What matches in ASCII?

Answer 11

Letters and symbols to numbers

Question 12

What is the advantage of Unicode?

Answer 12

It has more characters and bits than ASCII, allowing Chinese writing

Question 13

What is an input

Device?

Answer 13

Keyboard, mouse

Question 14

What is an output device?

Answer 14

A monitor

Question 15

What is a communication device?

Answer 15

A router or modem

Question 16

What does a CPU do?

Answer 16

Fetches, decodes, and executes instructions

Question 17

Where does a CPU fetch data from?

Answer 17

The ram

Question 18

What are the three parts of a CPU?

Answer 18

The arithmetic/logic unit, control unit, and registers

Question 19

What controls the CPU?

Answer 19

The system clock

Question 20

What does the system clock do?

Answer 20

Sends electric pulses at regular intervals

Question 21

What is the main memory?

Answer 21

Ram

Question 22

What is RAM aka?

Answer 22

Direct access memory

Question 23

How many bits are in a byte?

Answer 23

8

Question 24

What does defragmentation do?

Answer 24

Moves fragmented files so they are continuous

Question 25

What are the direct access portions of computers?

Answer 25

Ram and rom

Question 26

Who invented the idea behind the computer?

Answer 26

Babbage

Question 27

How does a cd work?

Answer 27

By reflecting a laser off of a disc

Question 28

What is the Nyquist-Shannon theorem?

Answer 28

Sample at a rate twice that of the frequency... 40kHz

Question 29

How many bits are in a cd sample?

Answer 29

16

Question 30

How many times per second is a higher quality cd sampled?

Answer 30

65,536

Question 31

What is moore's law?

Answer 31

We can double the number of transistors on a chip every 2 years

Question 32

What is a transistor?

Answer 32

Building block of a computer

Question 33

Who was Gordon Moore?

Answer 33

The co founder of intel

Question 34

What machines use artificial intellegance?

Answer 34

Watson, deep blue, clever bot, spam filters, google car

Question 35

What is the turning test?

Answer 35

Alan. Tests machines ability to be like a human

Question 36

What is the middle man in data transfers?

Answer 36

The modem

Question 37

What is a point to point/mesh network?

Answer 37

All computers are connected I each other

Question 38

What is a bus connection?

Answer 38

Computers that share a single | Connection line

Question 39

What is a wide area network?

Answer 39

Multiple interconnected LAN's

Question 40

What is ARPA!

Answer 40

Advanced research projects agency

Question 41

How many people are connected to the Internet?

Answer 41

2.2 billion

Question 42

What does TCP stand for?

Answer 42

Transmission control protocol

Question 43

What does IP stand for?

Answer 43

Internet protocol

Question 44

How does TCP help if something gets messed up?

Answer 44

The messed up bits are resent

Question 45

What is a problem with UDP?

Answer 45

If somehing is messed up, you're sol

Question 46

What is a top level domain?

Answer 46

.com/.org ect

Question 47

How many bits are in an IPv4 address?

Answer 47

32

Question 48

How many bits are in an IPv6 address?

Answer 48

128

Question 49

What is DNS?

Answer 49

Domain name system, translates a URL to an ip address

Question 50

What is hypermedia?

Answer 50

Web document links other web documents

Question 51

What does URL mean?

Answer 51

Uniform resource locator

Question 52

What does HTML stand for?

Answer 52

Hyper text markup language

Question 53

What is an advantage to object oriented code?

Answer 53

When a project gets large, it can be broken down into manageable parts

Question 54

How is code reused in object oriented code?

Answer 54

You kind of make templates and build off of them

Question 55

What must each class in java contain?

Answer 55

1 or more methods

Question 56

What does a method contain?

Answer 56

Program statements, like what is actually being done.

Question 57

What does a java app always have?

Answer 57

The main method

Question 58

What happens to comments in javadoc?

Answer 58

They are saved to a separate document

Question 59

What is white space?

Answer 59

Extra spaces

Question 60

What do you need to be careful of with java?

Answer 60

Letter cases

Question 61

What is an identifier?

Answer 61

Words a programmer uses in a program

Question 62

What levels are there of language levels?

Answer 62

Machine, assembly, high level, fourth generation

Question 63

What is specific to each CPU?

Answer 63

It's machine language

Question 64

What does assembly level allow for?

Answer 64

Some symbolic programming

Question 65

What does high level language require?

Answer 65

A compiler to translate high level to assembly level

Question 66

What levels are readable by humans?

Answer 66

High level and 4th

Question 67

Where is the fourth level usually used?

Answer 67

Commercial sector

Question 68

What is source code?

Answer 68

The basic code for a computer language

Question 69

Why does java use byte code?

Answer 69

It is not machine specific

Question 70

What is the I remediate step in java code?

Answer 70

Translating to byte code

Question 71

What is a syntax rule?

Answer 71

What we do to make sure a program is properly executed

Question 72

What is semantics?

Answer 72

Defining what a program statement actually means

Question 73

What is a compile time error?

Answer 73

Forgetting a brace or anything that has to do with the code

Question 74

What is a run time error?

Answer 74

Something that causes code to crash

Question 75

What is a logical error?

Answer 75

We messed up the code but everything runs fine, just giving incorrect output

Question 76

How many bits are in a pixel color?

Answer 76

8

Question 77

How many bits are there total in a pixel?

Answer 77

24

Question 78

How many shades of a color exist?

Answer 78

255

Question 79

Where us the origin of a plane in java?

Answer 79

The top left