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WorksheetsCSP Unit 2 Test - F2019
Total questions: 26
Worksheet time: 16mins
Which unit is the largest?
Megabyte
Terabyte
Gigabyte
Kilobyte
An artist makes an RGB raster image in which each pixel color is encoded with 12-bits --- 4 bits each for red, green and blue.Which of the following correctly shows the hexadecimal value for Red as a 12-bit representation.
F00
00F
FF00
FF0000
Approximately how much bigger (how many more bytes) is a megabyte than a kilobyte?
1,000 times bigger
100,000 times bigger
1,000,000 times bigger
1,000,000,000 times bigger
Approximately 1,000 ________ are equal to 1 terabyte (1 TB).
jengabytes
gigglebytes
gigabytes
megabytes
Which of the following is a reason to use lossy compression?
You want the compressed file to be larger than the original.
You want the highest quality audio file possible, with no modifications.
You want the highest quality image file possible, with no modifications.
You want to save space and are not concerned if the file is the highest quality possible.
a problem solving approach (algorithm) to find a satisfactory solution where finding an optimal or exact solution is impractical or impossible
Lossless Compression
Heuristic
Lossy Compression
encryption
Which of the following is irreversible?
lossy compression
lossless compression
abstraction
RLI
Which of the file types is an audiofile type?
jpg
mp3
png
csv
An original file is 100 MB, it is compressed to 80 MB (including dictionary). What is its compression rate?
90%
80%
20%
100%
Which of the following hexadecimal representations would represent dark green?
#191399
#00FF10
#001313
#001300
How would you lighten the color #bcc8e1?
+50 to each color component
+50 to the red component
-50 to each color component
-50 to the red component
How many bits are needed to represent 8 colors?
8 bits
24 bits
1 hex digit
3 bits
How many bits are needed to represent a 3 x 3 black and white image (exclude metadata)
3 bits
6 bits
9 bits
9 x 24 bits
The color widget uses 3 bytes of metadata. The first two bytes indicate the width and height of the image. The next byte indicates the number of bits that will be used to represent color. How many bits is used to represent color given the metadata (in binary) 00001000 00001000 0001001
3 bits
6 bits
9 bits
12 bits
Which of the following statements is FALSE?
The computer stores colors in hexadecimal
Every color has 3 components. A red, green and a blue component.
A bright color would be represented by a large number.
A computer uses 3 bytes to store a single colored pixel.
Lil’ Nibble, a local Soundcloud rapper, has recorded a new mixtape called “Half-a-byte,” produced by “Mibikibi and the Teraflops.” The mixtape has several audio files that have been compressed into a .ZIP file so they can be transferred easily and a separate .ZIP file containing album artwork and liner notes. If the mixtape .ZIP file takes up 800 MB and the artwork .ZIP file is 300 MB, what size flash drive do you need in order to transfer the files?
512 MB
1.0 GB
4 KB
2.0 GB
Consider the following three binary numbers:
01010
010000
1110
Which of the following lists the numbers in order from least to greatest?
010000
1110
01010
01010
1110
010000
01010
010000
1110
1110
01010
010000
Which of the following is a subdomain of quizizz.com
https://www.quizizz.com
join.quizizz.com
.com
quizizz
how many binary bits are required to store the decimal number 27?
4 bits
5 bits
6 bits
7 bits
Which layer of the internet controls the transportation of packets
DNS
Physical
Http
TCP
Which protocol is the foundation for transporting hypertext documents over the Internet?
DNS
TCP
HTTP
HTML
An online store uses 6-bit binary sequences to identify each unique item for sale. The store plans to increase the number of items it sells and is considering using 7-bit sequences. Which of the following best describes the result of using 7-bit sequences instead of 6-bit sequences?
2 more items can be uniquely identified.
10 more items can be uniquely identified.
2 times as many items can be uniquely identified.
10 times as many items can be uniquely identified.
IP addresses are a way to identify devices connected to the internet (we'll learn more about what IP addresses are soon!). An IPv4 address is encoded in 32 bits or 4 bytes. Typically when you see an IP address it is organized as 4 separate numbers separated by periods, where each of the 4 numbers is stored in 1 byte (8 bits). With this in mind, which of the following would not be a possible IP address?
8.8.8.8
192.168.1.1
32.344.216.42
142.237.56.117
A user clicks on a link to a website, and it begins to load immediately, but it takes a long time to load completely and pictures appear slowly, one by one. Which of the following is demonstrated by this situation?
High bandwidth, high latency
Low bandwidth, high latency
High bandwidth, low latency
Low bandwidth, low latency
Select the language supported by the ASCII character set
Binary
Analog
English
Japanese
What is the best explanation for why digital data is represented in computers in binary?
The binary number system is the only system flexible enough to allow for representing data other than numbers
As a consequence of history: early pioneers of computing were making secret codes in binary, and this simply evolved into modern computing
It's impossible to build a computing machine that uses anything other than binary
It's easier, cheaper, and more reliable to build machines that only have to distinguish between two binary states
