Test
2nd Form Data Representation
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Preguntas del test (28)
1What two digits are used in binary?
- A1 and 0
- B1 and 2
- C1, 2, 3 and 4
- D1 and 10
2What do the binary values of 1 and 0 represent in a computer?
- AHow a computer counts.
- BThe numbers on a computer's motherboard.
- CThe two possible states of a switch.
3What is the correct sequence for 8 bit binary place values?
- A64 | 32 | 16 | 8 | 4 | 2 | 1
- B100000 | 10000 | 1000 | 100 | 10 | 1
- C128 | 64 | 32 | 16 | 8 | 4 | 2 | 1
- D1 | 2 | 4 | 8 | 16 | 32 | 64 | 128
4What is the binary value of the denary (decimal) number 196?
- A10000100
- B11000100
- C01110011
- D11100000
5What is the denary (decimal) value of the binary number 01101100?
- A108
- B116
- C18
- D98
6Which of the following binary numbers is odd?
- A00101110
- B10010000
- C01000100
- D00010001
7How many values can a single bit have?
- ANone
- BFour
- CTwo
- DOne
8How many bits are there in a byte?
- A8
- B4
- C2
- D16
9How many bytes are there in a Kilobyte?
- A8
- B100
- C1000
- D10
10What is the correct explanation for a pixel?
- AThe smallest element of an image.
- BThe smallest amount of light in an image.
- CThe smallest number of bits in an image.
- DThe largest element in an image.
11How many bits do you need for each pixel to represent a black and white image?
- ANone
- BTwo
- CFour
- DOne
12What is the correct term for the number of bits per pixel?
- AResolution
- BColour/bit depth
- CPixel
- DNone of the above
13What is the number of bits (colour/bit depth) needed to represent 32 colours?
- A5 (2 x 2 x 2 x 2 x 2)
- B8 (2 x 2 x 2 x 2 x 2 x 2 x 2 x 2)
- C3 (2 x 2 x 2)
- D6 (2 x 2 x 2 x 2 x 2 x 2)
14How many colours will be represented by using a colour/bit depth of 7?
- A6
- B256
- C32
- D128
15What is the correct description of resolution?
- ABits per pixel
- BThe quality of the image
- CThe width in pixels multiplied by the height in pixels
- DThe bits per pixel multiplied by the file size
16What is the equation to find the file size of an image?
- Afile size = resolution / colour depth
- Bfile size = resolution x colour depth
- Cfile size = colour depth / resolution
- Dnone of the above
17When calculating the file size of an image what do you need to do in order to convert it into Kb (Kilobytes).
- ADivide by 8 (the number of bits in a byte) and then multiply by 1000 (the number of bytes in a kilobyte)
- BMultiply by 8 (the number of bits in a byte) and then divide by 1000 (the number of bits in a byte)
- CDivide by 8 (the number of bits in a byte) and then divide by 1000 (the number of bytes in a kilobyte)
- DMultiply by 8 (the number of bits in a byte) and then multiply by 1000 (the number of bits in a byte)
18What is the file size for an image with a colour depth of 4 and a resolution of 4000?
- A1000Kb
- B2Kb
- C12000Kb
- D4Kb
19What is the equation to find the resolution of an image?
- Aresolution = colour depth / file size
- Bresolution = file size x colour depth
- Cresolution = file size / colour depth
- Dnone of the above
20What is the resolution of an image with a colour depth of 8 and a file size of 8000Kb?
- A64,000,000
- B64,000
- C8,000
- D8,000,000
21What is the equation to find the colour depth of an image?
- Acolour depth = file size / resolution
- Bcolour depth = file size x resolution
- Ccolour depth = resolution / file size
- Dnone of the above
22What is the colour depth of an image with a resolution of 12,000 and a file size of 9Kb?
- A6
- B8
- C12
- D8000
23What are the three colours in a standard computer colour model?
- ARed Orange Yellow Green Blue Indigo Violet
- BRed Orange Green
- CRed Green Blue
- DCyan Magenta Yellow
24With the RGB colour model what is the highest decimal value each colour can have?
- A256
- B128
- C255
- D1
25What is the correct RGB code for the colour black?
- A0,0,0
- B255,255,255
- CFF,FF,FF
- D1,1,1
26We could say that colour images in computers are 'painted with light', this is called additive, what does this mean?
- AWhen you combine more of each of the colours red, green and blue together less light passes through from the spectrum.
- BWhen you combine more of each of the colours red, green and blue together you add the binary together.
- CWhen you combine more of each of the colours red, green and blue you add the colour depths together.
- DWhen you combine more of each of the colours red, green and blue you are increasing the amount of light across the spectrum.
27What is the base 16 number system called?
- AHedgerdecimal
- BOctadecimal
- CHexadecimal
- DSixteen
28Where is hexadecimal used in image representation?
- AIt is the code used for resolution i.e. #FCA5B6 represents a resolution of 16,557,494.
- BB
It is the code used to represent colours i.e. #FCA5B6 represents the colour 'baby pink'. - CIt is the code used to represent the colour depth of an image i.e. #FCA5B6 represents a colour depth of 16,557,494.
Información
- Descripción
- GCSE Computing Test sobre 2nd Form Data Representation, creado por Henry Deane el 07/06/2018.
- Autor
- Henry Deane
- Idioma
- English
- Visitas
- 17
- Etiquetas
- Valoración
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