Reorganising files on a hard disk so that parts of each file are stored together, which reduces access times
What is the name for a utility program that reduces the size of files so that less storage space is needed and files can be sent more quickly?
Data compression software
What is meant by file repair?
Software that recovers or reconstructs data in a file that has been saved incorrectly or become corrupted
What is meant by anti-malware software?
Software that scans a computer for known viruses and other malicious programs and quarantines any files that match
Which statement about how utility software is supplied is correct?
It may come with the operating system or be bought separately
What is meant by decompression?
Restoring a compressed file to its original size so that it can be used
What is the purpose of utility software?
To carry out housekeeping tasks so the computer runs efficiently
A large file is stored in several separate blocks across a hard disk instead of in one continuous block. What is this called?
Fragmentation
Why does defragmenting a hard disk make files quicker to access?
Files are stored together so the drive head moves to fewer locations
A document cannot be opened after the power was lost while it was being saved. Which utility software would be used to recover the data?
File repair software
Which statement about file repair software is correct?
It can recover data from a corrupted file, although some data may be lost
What is the main benefit of compressing a folder of files before sending it over the internet?
Less data needs to be transmitted, so the files are sent more quickly
Why should a copy of a backup be stored at a different location from the original data?
So the data survives an event such as a fire or flood at the original site
How does anti-malware software work out that a file contains a virus?
It compares the file with virus definitions stored in a database
Which type of malware records a user's keystrokes and sends the information to a hacker?
Spyware
A company keeps its customer records on a computer. Why is it important to back up these records regularly?
So lost or damaged records can be restored from the copy
Disk defragmentation moves the parts of each file together on a hard disk. What effect does it also have?
Free space is collected into one area so new files are not split
A pupil needs to email a folder of photographs, but the folder is larger than the size limit set by the email service. How could data compression software help?
The compressed folder may be small enough to fit within the limit
A free game is installed on a computer. Unknown to the user, it also installs software that lets an attacker take control of the computer. Which type of malware does this describe?
A trojan horse
Anti-malware software checks files while they are being downloaded as well as scanning the whole computer. Why is this useful?
Harmful files can be stopped before the user opens them
A company copies its data onto backup tapes at the end of each day. How does compressing the data before it is backed up help?
More data fits onto each tape, so fewer tapes are needed
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