CIE AS Computer Science Paper 1 Questions And Answers Well Illustrated.
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Course
CIE AS Computer Science
Institution
CIE AS Computer Science
CIE AS Computer Science Paper 1 Questions And Answers Well Illustrated.
Describe the sequence of events for a web page with embedded server-side code. - correct answer.The browser requests the web page
The web server executes the server-side code, generating an HTML web page
The web serve...
CIE AS Computer Science Paper 1
Questions And Answers Well Illustrated.
Describe the sequence of events for a web page with embedded server-side code. -
correct answer.The browser requests the web page
The web server executes the server-side code, generating an HTML web page
The web server returns the web page to the client
The client browser displays this web page
Define pixel - correct answer.the smallest addressable element in an image
(a single square of one colour)
Define bit depth of an image - correct answer.The number of bits used to represent the
colour of a pixel
Define the resolution of an image - correct answer.The total number of pixels wide by
the number of pixels high of an image OR number of pixels per unit measurement (eg.
dots per inch)
Define file header - correct answer.a part of the file that stores metadata about the file
List things stored in the file header of a bitmap image - correct answer.Width/Height of
image
Bit depth of image
Offset in bytes where image data begins
Type of compression used
File size
Describe run length encoding in the context of an image - correct answer.replaces
repeated sequences of the same colour pixel with a single colour code and the number
of times that colour occurs
Define copyright - correct answer.The formal and legal rights to ownership of
intellectual property in order to protect against unauthorized reproduction of work.
Define disk formatter software - correct answer.Sets up a disk so that it is ready to
store files
,Define disk repair software - correct answer.scans for errors in the disk: prevents bad
sectors being used by marking them. reduces access times by optimising storage
Define back-up software - correct answer.makes a copy of data at regular intervals so
that if it is lost it can be retrieved
Describe how disk-mirroring can be used to recover from data loss - correct
answer.Data is stored on two disks simultaneously.
If the first disk drive fails, the data is accessed from the second disk.
Define disk defragmentation software - correct answer.Moves parts of files so that each
individual file is stored contiguous blocks on the disk drive, to make files load faster
Define disk cleanup software - correct answer.Releases storage by removing
temporary files, improving system performance
List key management tasks performed by the operating system - correct
answer.memory management
file management
security management
hardware/peripheral devices management
provision of a platform for software
provision of a user interface
Explain why an operating system is needed - correct answer.To provide an interface
between the user and the hardware, hiding the complexities of the hardware.
To provide a platform for software to run on.
Describe how an operating system provides a user interface - correct answer.Allows
user to communicate with software
Facility for input and output
Provides a graphical user interface eg. windows, menus
Describe device management tasks performed by the operating system - correct
answer.Managing drivers
allocation of devices to processes
Device detection
power management
Keep track of device status
Describe error detection and recovery tasks performed by the operating system -
correct answer.Deals with interrupts
Deal with run time errors
Deal with hardware faults
Error diagnostic messages
Saves system restore points
, Describe memory management tasks performed by the operating system - correct
answer.allocates RAM to certain tasks
memory protection (preventing a process from accessing memory not allocated to it)
transfers data between memory and secondary storage
can facilitate virtual memory
Describe process management tasks performed by the operating system - correct
answer.Manages scheduling of processes
Allows for multitasking
Handles process priorities
Prevents interference between processes
Describe security management tasks performed by the operating system - correct
answer.user accounts
access rights
password protection
Describe file management tasks performed by the operating system - correct
answer.Divides and allocates storage space to files
Maintains directory structures
Provides file naming conventions
Implements access rights
Specifies tasks that can be performed on a file (e.g. open, delete, move etc.)
Describe printer management tasks performed by the operating system - correct
answer.Installs printer drivers
Sends data to the printer buffer
Handles interrupts from the printer
Describe the reason for server-side scripting - correct answer.All data is held on the
server
The server only sends the results of the query to the client
The client does not have access to all the data, which keeps the data more secure
Explain Von Neumann architecture - correct answer.1. Stored program concept: data
and instructions stored in the same memory.
2. Single processor.
3. Linear fetch, decode, execute cycle.
Define program counter - correct answer.holds the address of the next instruction to be
executed
Define MAR - correct answer.memory address register
stores the address (received from the program counter) of the instruction or data to be
loaded from memory
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