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WorksheetsComputer Science 1.2
Total questions: 39
Worksheet time: 28mins
... cannot be changed by a program or user. It is used to store instructions for the computer to start up when it is turned on. It also stores the BIOS. NON-VOLATILE.
RAM
ROM
BIOS
... temporary memory in which all programs, applications and data are stored, when they are being used. If the computer is turned off, all the data is lost. VOLATILE.
RAM
ROM
BIOS
... runs as part of the start up system, and loads the operating system. It performs a variety of self-diagnostic tests on the hardware, checks for any hardware attached to the computer and provides a basic user interface where some settings can be changed.
RAM
ROM
BIOS
What does ROM stand for?
(a)
What does RAM stand for?
(a)
What does BIOS stand for?
(a)
Virtual memory is used when ... is full. It is part of the secondary storage used as temporary ... . Data can be moved back and forth between ... and virtual memory. Swapping or paging is a process used by the OS to transfer data between the ... and virtual memory.
(a)
Select the disadvantages of virtual memory
slower than the RAM
often the OS has has to switch data between virtual memory and RAM
moving data between virtual memory and RAM takes time
the virtual memory is really far away
Select all the different types of secondary storage
optical
tupperware
magnetic
solid state
Select all the types of optical storage
DVD
camera
CD
DCD
Select all the types of magnetic storage
magnetic hard disk
floppy disks
fridge magnets
magnetic tape
Select all the types of solid state storage
flash memory
SD cards
CD cards
memory cards (camera)
... is the number of pixels used to represent an image, the quality of the image improves with higher ... , but so does the file size.
colour depth
resolution
file size
pixels
... the number of bits used to represent a colour in an image, the quality of the image improves with larger ... , but so does the file size.
colour depth
resolution
file size
pixel
image file size = ... x image height x image width
(a)
image ... = colour depth x image height x image width
(a)
... is data about data.
(a)
... is the use of algorithms to reduce file size, this makes them quicker to upload/download/transfer over the internet.
lossy compression
lossless compression
file compression
file squashing
... reduces the file size by permanently deleting certain (particularly redundant) information, the quality can be affected. Generally used for images and sound.
lossy compression
lossless compression
file compression
file squashing
... reduces file size by grouping repeated information together, this is called run length, all the original data remains. Generally used for text documents and spreadsheets.
lossy compression
lossless compression
file compression
file squashing
Convert 26 into 8-bit binary
(a)
What is 1010 0111 in hexadecimal
A7
107
167
B6
Convert B5 into binary
(a)
What is 10110011 in denary?
179
180
176
B3
How many bits in a nibble?
1
2
4
8
How many bytes in a megabyte
(a)
A kilobyte is how many bytes?
(a)
When doing binary addition, and the answer contains too many bits to be stored properly, it is called....
overflow error
too many bits
the computer crashes
underflow error
In a binary shift, if the number is moved 2 places to the left, the number is multiplied by ...
(a)
In a binary shift, if the number is moved to the right the number is...
multiplied by 2
divided by 2
divided by 10
subtracted from itself
Binary addition 0011 + 0101 = ?
(a)
a ... is the characters and symbols a computer can use, understand and display
(a)
How many bits does ASCII use?
7
8
16
up to 32
How many bits does extended ASCII use?
7
8
16
up to 32
How many bits does UNICODE use?
7
8
16
up to 32
Which, out of ASCII, extended ASCII, and UNICODE, takes the longest to transfer?
ASCII
extended ASCII
UNICODE
they all take the same length of time
... is how many samples of the sound are taken per second
(a)
... is the number of bits used to store each sample
(a)
... = sample rate x duration (s) x bit depth
sound file size
image file size
file size
sound
