Flashcards
Utilities
Flashcards do conjunto (21)
- 1What is a utility?Utilities provide extra functionality that make it easier to use.
They can only be used for ONE thing. - 2What are utility softwares?These are small and useful programs that can be seen in file management, diagnostic tools and system information tools that gather information about your computer.
- 3What does encryption software do?Encryption scrambles data so that it cannot be understood by anyone that intercepts it unless they know the key that was used to scramble it.
Encryption software uses an algorithm to encode the data so that is cannot be read and uses a key or a pair of keys to encrypt and decrypt the data. - 4What is encryption commonly used for?- Encrypt files and folders on a portable disk such as a USB memory stick.
- Encrypt web communication.
- Encrypt data on an organisation’s database. - 5What are the benefits of encryption?- Knowing that if you have personal details in your possession that this data is safe if it has been encrypted.
-Unless you have given someone the key to decode the data it makes it a lot more difficult for someone to hack into the data. - 6What happens when a file needs to be saved?The operating system splits the file into small pieces and puts each piece into any free block on the disk.
- 7What are two problems when fragmentation occurs?Retrieving data from the file takes more processing
More processing means reduced performance - 8Defragmenting the hard drive will do what? What are the benefits of using defragmentation?Defragmenting the hard disk reorganises files so they are stored together
Processing time reduces so performance is improved
Free space is also in one place so new files do not have to be fragmented - 9What is fragmentation?After many files have been saved and deleted, it is very likely that the files will be split across blocks in the wrong order and in different parts of the disk.
- 10What does disk clean up allow users to do?It allows users to remove files that are no longer needed or that can be safely deleted.
- 11What does disk clean up help do?can help to speed up and improve the performance of the computer.
- 12Name three examples of what disk-clean up allows you to empty.Recycle Bin, delete Temporary Files, and delete Thumbnails.
- 13What is formatting?the organization of information according to preset specifications
- 14What is data compression?Compression is used to reduce file sizes and change various attributes of a file.
- 15What type of files are commonly compressed?especially graphics and audio
- 16Why is compression important?Reduces bandwidth usage and data consumption to download and send a compressed file.
Can enable file sizes to fit with strict email attachment or ISP limits.
Increases the amount of data that can be stored or archived on disk. - 17Explain the difference between data compression in text and in images.The size of an image file depends on the colour depth and dimensions. The size of an audio file depends on the sample rate and bit depth. The size of an image file and audio file can be very large
- 18What is a backup?A backup is a copy of data or files. Backing up is important for everyone using computers as files and data can become corrupted, be accidentally overwritten or deleted.
Backups are often made on separate storage drives or on a different server. - 19What is the difference between a full backup and an incremental backup?Full backup
Complete backup of everything which can be restored independently of any other backup
Takes greater time and disk space to create the backup
Incremental backup
Records only the changes made since the last backup
A entire chain of backups is required to fully restore files - 20Why is utility software used?because it will help to carry out routine tasks to maintain and optimise the system.
- 21What utilities are used to keep the system running well?Security Checks
Identifying and removing viruses
Cleaning up files
Software updates
Backing up data
Issuing warnings and alerts that updates or backups are required
Managing peripherals
Informações
- Descrição
- A level Computer Science (Unit 1 - Topic 2) FlashCards sobre Utilities, criado por Ariana Parr em 21-02-2022.
- Criado por
- Ariana Parr
- Visualizações
- 0
- Avaliação