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Data representation quiz
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Questions in this quiz (50)
1What numeric base does Binary operate on?
- A2
- B1
- C8
- D16
2How many bits are there in a byte?
- A8
- B16
- C1
- D2
3What is the maximum number of bits needed to represent 15 in denary?
- A6
- B4
4What is the 8-bit binary representation of 17?
- A00110010
- B00010001
- C00001101
- D00100010
5What is the binary representation of 32?
- A00100000
- B00100100
- C00110000
- D00100001
6What is the denary representation of this 8-bit number: 01001111?
- A59
- B79
- C69
- D49
7What is the denary representation of this 8-bit number: 11010101?
- A199
- B206
- C228
- D213
8How many bytes are there in a terabyte?
- A1024kB
- B1024MB
- C1024GB
9Why do we use the binary number system in computing?
- ABecause a CPU has two transistors
- BTo represent the two different states of transistors
- CTo allow the CPU to be in one of two states
10What is the hex number 6B in binary?
- A01101011
- B10101110
- C01110111
11How many bits are used in ASCII?
- A16
- B1
- C7
- D8
12How many bytes are used in Unicode?
- A8
- B16
- C1
- D2
13The ASCII code is represented by using 16 bits.
- ATrue
- BFalse
14ASCII is capable of representing non-European languages.
- ATrue
- BFalse
15Upper and lower case letters have different ASCII codes.
- ATrue
- BFalse
16What is the maximum number of positive integer values that can be represented in 8-bits?
- A16
- B256
- C65,536
- D128
17What is the maximum number of positive integer values that can be represented in 7-bits?
- A16
- B256
- C65,536
- D128
18A character set is...
- Awhat language can be used in a computer system.
- Bthe fonts that a computer has installed.
- Cthe possible characters that can be represented by a computer system.
19ASCII can represent more characters than Unicode.
- ATrue
- BFalse
20ASCII stands for...
- AAmerican Standard Code for Information Interchange.
- BAmerican Scientific Code for Information Interchanging.
- CAbsolute Standard Code for Instruction Interchange.
21What do we call the smallest unit of data that can be represented in an image?
- APixel
- BDot
- CColour
- DBit
22What is meant by colour depth?
- ANumber of pixels in the image
- BThe number of colours available for each pixel
- CHow pixelated the image is
23If you increase the colour depth then the file size will decrease.
- ATrue
- BFalse
24How many colours can be represented with a 4-bit colour depth?
- A2
- B4
- C16
- D256
25What is the term used to define what must be known about a bitmap for it to be represented accurately?
- AMicrodata
- BMetadata
- CMegadata
26In modern technology, what unit of measurement would be used for screen size?
- APixels per inch (PPI)
- BDots per inch (DPI)
- CPixels per metre (PPM)
27Which of the following is not stored as metadata about an image?
- AHeight
- BColour depth
- CResolution
- DNumber of people in the image
28Which of the following is not an image file?
- APNG
- BJPEG
- CBitmap
- DMPEG
29What three colours are used to produce a broad array of colours in a computer system?
- AGreen, Red, Orange
- BRed, Green, Blue
- CYellow, Green, Red
30What is the name of the type of graphic that uses shapes of solid colour?
- ARaster
- BGIF
- CJPEG
- DVector
31What unit is sample rate measured in?
- ABits per second (Bps)
- BHertz (Hz)
- CMegabits per second (Mbps)
32Which of the following is not true if you increase the sample rate?
- ABetter quality of recording
- BNeeds greater storage space
- CLarger file size
- DDecrease in quality
33What is meant by bit depth?
- AThe number of samples taken per second
- BThe amplitude of each sample
- CThe number of bits used per second of audio
- DThe number of bits used to store each sound sample
34Which of the following is true is you decreasing the bit rate?
- AFile size increases
- BSound quality increases
- CSound quality decreases
- DNumber of sound samples taken per second increases
35What is measured when the wave is sampled?
- AAmplitude
- BHertz
- CBit rate
- DFrequency
36What sample rate is used for CD-quality sound?
- A44,100Hz
- B88,200Hz
- C22,100Hz
37The purpose of a digital to analogue converter is to...
- Aconvert binary data into analogue form so we can hear it via a speaker.
- Bconverter sound waves into binary so it can be understood by a computer.
38What piece of hardware would you use to input sound into a computer?
- AA speaker
- BAn analogue to digital converter
- CA microphone
- DA digital to analogue converter
39If you increase the bit depth of an audio file then you increase the quality.
- ATrue
- BFalse
40The amplitude of the sound wave is...
- Ahow high the wave is from the crest or trough.
- Bthe frequency at which is it sampled.
- Cthe speed at which it travels through the air.
41What is compression?
- ATo convert one file to another
- BTo reduce the size of data to save space
- CTo minimize the time taken for a file to be downloaded
- DTo compress something by pressing it very hard
42What does lossy compression do to files?
- AIncrease the file size and keeps the same quality
- BEliminates no information at all
- CDecreases the file size and keeps all the same quality
- DEliminates unnecessary information in a file to reduce file size
43What is lossless compression?
- ANo information is lost but file size is increased
- BThere is no loss in information at all after compression
- CFiles that have the exact same data after compression
- DCompression that involves an algorithm
44What type of compression does the ZIP format use?
- ALossy
- BLossless
45What type of compression would you use to compress a video?
- ALossy
- BLossless
46What type of compression would you use to compress a text file?
- ALossy
- BLossless
47What type of compression may remove some data?
- ALossy
- BLossless
48Which of the following are not in a compressed format?
- AJPEG
- BMPEG
- CBitmap
- DMP3
49Uncompressed audio and video files require less memory than compressed files.
- ATrue
- BFalse
50JPEG stands for...
- AJoint Photo Exempted Grade
- BJoint Photographic Experts Group
- CJunior Photographic Export Group
Information
- Description
- GCSE Computing Quiz on Data representation quiz, created by Charlie Solk on 06/12/2021.
- Author
- Charlie Solk
- Language
- English
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