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Worksheets1.2 Combined Data Rep
Total questions: 104
Worksheet time: 3hrs 32mins
Each digit in binary is called a...
byte
nibble
bit
kilobyte
A group of 8 binary bits is called a...
byte
bit
nibble
A group of 4 binary bits is called a...
bit
byte
nibble
Why use hexadecimal instead of binary?
It is easier to use as it summarises four binary numbers in one character
It takes up less memory
It is faster for a CPU to process
All symbols displayed in a computer are represented by a code. The computer looks up the symbol matching the code from a list of codes and their associated characters. The list of code and characters is called the...
character set
character collection
character group
character assemble
A pixel is one dot in an image. The number of bits per pixel determines...
how many colours each dot can represent
how many dots each dot can represent
how many shades each dot can represent
how many pixels each dot can represent
The more bits per pixel the greater the...
pixel depth
colour depth
dot depth
What is the result of this binary addition: 0110 + 0101?
(a)
What is 10111100 in hex?
(a)
How many bytes in a megabyte?
1,000,000
1000
1,000,000,000
1
What is the result of this binary addition: 0111 + 0001?
(a)
What is 1110 in hex?
(a)
What is 10110110 in hex?
(a)
What is 0101 in denary?
(a)
What is 01100101 in denary?
(a)
What is 10101100 in denary?
(a)
What is 1100 in Hex
(a)
What is 00001101 in denary?
(a)
Convert the following binary data into text characters 01000110 01000001 01000100 01000101
(a)
Using 8-bit ASCII how many bytes would the following message need "Bring hat!"
(a)
What is the name of the character set that can represent all languages?
Universal
ASCII+
Unicode
EBDIS
Please calculate the file size of this image in bytes, just the number for answer.
(a)
Convert 195 to binary, answer in a byte.
(a)
Convert 170 to binary, answer in a byte.
(a)
Convert 129 to binary, answer in a byte.
(a)
Convert 3 to binary, answer in a byte.
(a)
Which type of compression ensures that no data is lost?
(a)
Compression makes file sizes...
Bigger
Smaller
Keeps them the same
An advantage of lossless compression is...
All data is lost
The file size stays the same
All of the important data is kept
A disadvantage of lossless compression is...
There is a big reduction in file size
There is only a slight reduction in file size
There is no reduction in quality
Cannot be used on text or software files
What is the file size in bytes of this image? (Just enter the number)
(a)
Snapshots of the amplitude of a sound wave.
Define the term 'bit depth'
Snapshots of sound are taken as the wave cannot be represented as a series of continuous changes.
The number of samples taken each second
The number of bits used per second of audio
The number of bits available for each sample taken
Calculate the file size of a sound file using a 16 bit bit depth and a sample rate of 8Khz over 10 seconds. What is the answer in bytes?
160 KB
320 KB
1280 KB
180 KB
In a bitmap graphic each pixel is represented in _______
Denary
Binary
Hexadecimal
By letters
How many bits per pixel do you need to make 4 colours?
colour depth of 1 bit
colour depth of 2 bit
colour depth of 3 bit
colour depth of 4 bit
How many colours can be used for each pixel if the colour depth is 4 bit?
(a)
How many colours can be used for each pixel if the colour depth is 8 bit?
(a)
Reduce the quality of the image.
Reduce the amount of binary needed for each pixel.
Make the file size larger
Remove pixels from the image.
What would be the colour depth of an image which can use up to 256 colours? (Just enter the number)
(a)
Calculate the file size of a sound file using an 8 bit bit depth and a sample rate of 10 KHz over 8 seconds. What is the answer in bytes?
640 KB
120 KB
80 KB
64 KB
What is the result of this binary addition: 0111 + 0011? Answer in a nibble and ignore any overflow.
(a)
What is the result of this binary addition: 10101100 + 01110110? Answer in a byte and ignore any overflow.
(a)
Doing a 2 bit left logical shift has what effect?
Divides the number by 2
Divides the number by 4
Multiples the number by 2
Multiplies the number by 4
Apply a 1 bit left logical shift to 10001100. Answer in a byte and ignore any underflow/overflow.
(a)
What are the total number of characters available in the Extended ASCII character set?
(a)
An image uses 20 colours, what colour depth in bits does it require?
(a)
Please calculate the file size in bits for this image.
(a)
What is C4 in binary?
(a)
What is 4F in denary?
(a)
What is D3 in binary?
(a)
What is A1 in denary?
(a)
What is 11101010 in hex?
(a)
What is 10010010 in hex?
(a)
What is the ASCII for G in binary?
(a)
If I wanted to compress a text file I would make use of (a) compression
If I wanted to compress a very high bit rate video file I would make use of (a) compression
Each recording of the wave amplitude is called a (a)
The number of levels that you are able to record for the wave amplitude is determined by it's ___ _____
(a)
The number of times you record the amplitude of a wave in a second is called it's ______ ____
(a)
How many bytes in size would a 10s long sound file recorded at 8 Hz and using a 4-bit bit depth?
(a)
What are examples of meta data for an image file? Select all that apply.
Height of image
Width of image
File name
The binary data that represents all the pixels
Date of creation
In ASCII the character 'A' is represented by the denary value 65, what is the binary for the Character 'D' - please answer in 8 bits.
(a)
In ASCII the character 'P' is represented by the hexadecimal value 50, what is the denary for the Character 'M' ?
(a)
Reorder the following from smallest on the left to largest on the right
Bit
Byte
MB
GB
PB
A binary shift (a) of (b) places has been applied to the 8-bit binary number 10110000 to get the result 10000000
A binary shift can be performed on a binary integer. A (a) shift of (b) places will multiply a number by 8.
Layla is an artist. She draws images by hand. The image is then scanned and stored on a computer.
Layla stores her images on a secondary storage device.
Each image has a fixed size of 1 MB. The storage device has a capacity of 3 GB.
Calculate how many images can be saved on the storage device
(a)
Ali’s tablet computer has 100 GB of secondary storage. There is currently 80 GB available.
Ali wants to transfer a series of video clips onto his tablet. Each video is, on average, 200 000 kilobytes.
Calculate an estimate of the number of video clips Ali can fit onto his tablet
(a)
Match the following
Right shift of 2 places on 10101000
00101010, divides by 4
Left shift of 1 place on 00101101
01011010, multiplies by 2
Right shift of 2 places on 11101001
00111010, divides by 4
Left shift of 3 places on 00011111
11111000, multiplies by 8
On the OCR spec both ASCII and ASCII Extended both use _ bits.
(a)
Identify the effect(s) that each change will have on the sound file.
Duration changes from
10 minutes to 20 minutes
Sample rate changes from 44 kilohertz to 8 kilohertz
Bit depth changes from 8 bits to 16 bits
Bitmap images are represented in binary, they are made up of individual (a) each has a given (b) code, this represents the (c) of it. The number of these is referred to as it's (d)
The table has four statements about the storage of images on a computer. Identify if the statement is true or false.
Each colour has a unique binary code
Metadata stores the colour of each pixel in the image
A bitmap is made of pixels
The higher the colour depth, the smaller the number of different colours that can be displayed
Identify if the statement is true or false
The sample rate is the number of times the amplitude is recorded per second
The smaller the bit depth the smaller the range of sounds recorded
The larger the sample rate the larger the bit depth
The frequency and pitch of the sound wave are measured
Sound is stored using pixels
Calculate the fewest number of bits that could be used to store the logo as a bitmap image
(a)
A character set stores (a) of the characters that the computer can represent. Each character is given a (b) binary code. Lower-case and upper-case letters in a character set are given (c) binary codes. One example of a character set is ASCII. This character set uses (d) bits for each character. If the code value for the character ‘F’ is 70 then the code value for
the character ‘L’ is (e)
In sound representation, a (a) of 48KHz means that (b) (c) are take per second.
(a) compression is where data is (b) lost. This is not suitable for compression of (c) files, but is suitable for (d)
A benefit of (a) is that it (b) file size. Meaning it takes (c) time to transmit. It also requires less (d) space. This means you use less (e) to transmit.
The sound wave is (a) where the (b) of the wave is measured at (c) intervals. Each (d) is stored as (e)
What is the smallest denary number that can be
represented by a 4-bit binary number?
(a)
What is the largest denary number that can be
represented by a 6-bit binary number?
(a)
What is maximum number of different colours
that can be represented with a colour depth of
7-bits?
(a)
What is the minimum number of bits needed to
represent 150 different characters in a
character set?
(a)
A musician uses a computer to make and record music. Identify the correct description of sound sampling.
The frequency of the wave is measured a set number of times each second
The amplitude of the wave is measured at set intervals.
The digital sound wave is measured a set number of times each second
The analogue sound wave’s resolution is measured at set intervals
Reorder the following, smallest size on left and largest on right.
0.1 GB
200,000 KB
300 MB
.002 TB
2.1 GB
An (a) sound wave needs to be converted into a digital
sound wave. Sound (b) is when the amplitude of the sound wave is measured at set intervals.The (c) is the number of times a second the sound wave
is measured.
Each sound sample amplitude is given a (a) binary number. The
number of bits allocated to each sample is the (b) .
The (c) the number of bits, the wider the number of
amplitudes can be measured.
What are the advantages and disadvantages of a school storing their data in the cloud
Teachers and students can access files from home or school using the internet.
Cloud providers often back up data automatically, reducing the risk of losing work.
Multiple users can work on the same document at the same time.
More storage space can usually be added quickly.
If the internet goes down, files may not be accessible.
Sensitive student information could be hacked or leaked.
Cloud services often require regular payments.
If the provider has technical issues, access to data may be interrupted.
Data stored in remote data centres
Users log in through web browsers or apps
Identify the quantity of megabytes that is the same as 2 terabytes.
2000 MB
20 000 MB
200 000 MB
2 000 000 MB
Please match the advantges of Unicode versus using ASCII
Uses less storage space because it uses fewer bits per character.
Faster to process on some older or simpler systems.
Can represent characters from many languages.
Supports symbols and emoji.
Uses 8 bits per character
Uses 16 bit or more per character
