Unit 1-AP Comp Sci
how many total numbers can be represented with an 8-bit binary system
256 This is a correct answer
which of the following is not a way computers represent complex information
Abstraction helps represent complex information by surfacing complexity tha
Modern car odometers can record up to a million miles driven. What happens to the odometer reading when a car drives beyond its maximum reading?
After reaching the maximum reading, the odometer restarts from 0.
How is a Creative Commons license different from a regular copyright?
Creative commons is actually a license that is applied to work that is protected by copyright. It's not separate from copyright, but instead a way of easily sharing copyrighted work.
What is the most important quality of lossless compression?
The data is transformed to usually make it smaller. It can always be re-constructed back to the original. still has all information
Binary, Decimal and Hexadecimal
are the most common number systems to see in computer science.
how do computing devices represent information?
as bits which is either a 0 or a 1
analog actual image sample not exact digit representation
as you sample more the more exact it becomes
Lossy Compression
how information is represented using fewer bits when it's OK for some of the information or details to be lost.
intellectual property
how people can own digital information and the ways they can share access to their creative digital works.
prototype
is a fancy word that means a preliminary sketch of an idea or model for something new. It's the original drawing from which something real might be built or created.)
which of the following binary number is largest
11000000 This is a correct answer
convert the decimal number 29 to binary
11101
covert the decimal number 1002 to binary
1111101010 This is a correct answer
black and white
2 choices 1 pixel
Binary vs Decimal number system
- Numbers are used to represent all information manipulated by a computer - Computers use the binary number system ○ Binary values are either 0 or 1 - We use the decimal number system: ○ 0-9 are decimal values
covert the binary base 2 number 1011 to decimal base 10
11
red,green,blue
3 bits for each pixel 8 choices of color
Which of the following would result in a better digital approximation of an analog black and white image?
Decreasing the size of each sample square, thus increasing the number of samples taken.
Why should we care about information being represented digitally? How does this impact you personally?
Digital information can be easily copied so its important to give credit. Personally, if I were to create something I would want credit because with the advancements of the designs being created today, there is a lot of hard work.
How would you explain a number system to someone who had never seen numbers before?
I would use a specific group of items that are still in one category but different from each other for example cars or animals. They are all cars overall, yet they are different colors/types and go in an order. Same with numbers. They are still numbers, but differ from eachother and go in a specific order.
Which statement about analog and digital images is true?
Sampling an analog image more frequently produces a digital image with a better representation.
Assume your friend just sent you 32 bits of pixel data (just the 0s and 1s for black and white pixels) that were encoded after sampling an image. Choose the two statements that are true
The correct width and height must be input into the pixelation widget to produce the image. The fact that only 32 bits were used to represent the image indicates relatively large sample squares were used. The digital image may vary from the analog image significantly.
which of the following best describes the difference between a painting itself and the photo of the painting stored?
The photo is a digital representation of the analog painting
which of the following is true how computers represent information
With a fixed number of bits some numbers are too large to represent in a co
Rapid Prototype
is a group of techniques used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer aided design (CAD) data.
which type of compression causes some number of the original pixels,sound waves, video frames to be removed forever
lossy
Rapid Prototyping
share our ideas through something called