AP CS Unit 1 test

Question 1

What is a computer? (Lesson 1)

Answer 1

A computer is a machine that works with information

Question 2

What does the letters stand for in IOPS

Answer 2

Input _Output _Proccesing _Storage

Question 3

Hardware

Answer 3

Physical parts required for a computer to run

Question 4

Software

Answer 4

set of instructions that allows hardware to perform different task

Question 5

Lesson 2 “ Parts of a Computer “

Answer 5

Lesson 2 starting now

Question 6

Mother Board

Answer 6

-Nervous system of a computer
-The main circuit of the computer
-All parts connect to it
- Allows communication between other parts of the computer

Question 7

CPU

Answer 7

• the “Brain” of the computer
• Executes all compands for the computer
  -Tells everything what to do
• If its dead or off nothing will work
  -Measured by Hertz ( MHz ,GHz)

Question 8

What does CPU stand for

Answer 8

Central Proccesing Unit

Question 9

GPU

Answer 9

• The “eyes and mucsle “ of the computer
  -Displays what you see , handles most heavy task
• Handles all the visual data
  -Measured by speed in Hertz (MHz , GHZ)

Question 10

What does GPU stand for ?

Answer 10

Graphic Proccessing Unit

Question 11

RAM

Answer 11

• ” short term memory “
  Temporary space for the CPU to work
  -Measured in Bytes

Question 12

What does RAM stand for

Answer 12

Random Access Memory

Question 13

Hard Drive

Answer 13

” Long term memory
- Storage space for all software (files ,apps ,programs operationg system ect.)
-Measuring Bytes

Question 14

Power Supply

Answer 14

“energy”
Supplies all the parts of the computer with energy

Question 15

Network card

Answer 15

Allows the computer to connect with the internet

Question 16

Lesson 3&4

Answer 16

Repeersenting Images & Binary Numbers

Question 17

How is binary counted

Answer 17

2^1

Question 18

Bit is short for what ?

Answer 18

Binary digit

Question 19

A bit can be only 2 numbers what are thoose 2 numbers ?

Answer 19

1 + 0

Question 20

8 bits create (blank) ?

Answer 20

1 byte

Question 21

1 is ?

Answer 21

ON

Question 22

0 is ?

Answer 22

OFF

Question 23

Binary number start with what number

Answer 23

Zero

Question 24

Steps to turning a decimal number to a binary number ( Example 3)

Answer 24

3’s largest number it can go into is 2^1 which iks 2 . But with 1 left over it can do into 2^0 which is 1 . Making the 3’s binary number 11.

Question 25

Example 17

Answer 25

The largest power of 2 ) 17 can go into is 2^4 which is 16 . Leaving on beind which is 2^0 .
Makng its Binnary number 10001

Question 26

SIde Note

Answer 26

Side Note : where the 1’s are in bainary mean thats where the number can fit into and the zeros are where in couldn’t
- Exampe - 16 which is 2^4 . Which is 5 places . and since the number 16 goes into 16 once there is only one 1 . Binary number - 10000

Question 27

Turning Binary back into decimal

Answer 27

1000 is a binary number , that has 4 places . Since the power of 2 starts with zero 4 places mean 2 to the power of 3 which 8 . So 1000 is 8 in decimal

Question 28

Lesson 5

Answer 28

Overflow and rounding error

Question 29

If to have to but 2.10 in binary what would it be .
4or2

Answer 29

2

Question 30

$4.16 rounding . 4 or 2

Answer 30

4

Question 31

Lesson 6

Answer 31

Repersenting Text