Flashcards
Computing
Flashcards do conjunto (14)
- 1What is Secondary storage and when is it used?A type of storage that is non-volatile, and is used to store data when the computer is turned off. An example is the internal hard disk and CDs.
- 2Describe the 3 different types of storage devices with advantages of each.Magnetic - This includes floppy disks and the hard disk. It is reliable, portable and cost effective.
Optical - This includes CDs and DVDs. They have the ability to be written to, are portable, and quite sturdy.
Solid state - This includes USB and flash drives. These have no moving parts so are very reliable, and they are very small and light so good for portability. - 3What is the function of the operating system?It controls the hardware (peripherals) and provides a user interface.
- 4Convert the number 53 to binary and hexadecimal.Binary - 0011 0101
Hex - 35 - 5What is data Validation?The process of checking data as it is entered to ensure that it is valid.
- 6Describe the three main topologies with one advantage and one disadvantage of eachBus - When all the devices are connected by a single 'backbone' cable. It is easy to install but if a fault develops in the main cable, the whole network fails.
Ring - When all the devices are connected in a ring to two other devices. There is no data collisions, but if the main cable fails, the whole network fails.
Star - Each device is connected by its own cable to the hub or switch. It is very reliable as there are no data collisions, but it is expensive and difficult to install. - 7What are the three different types of logic gates?AND, NOT, OR
- 8What is an input and output device?An input device is a hardware device used to input data into a computer system for processing. An output device is a hardware device that outputs data.
- 9What is the purpose of the CPU?The purpose of the Central Processing Unit is to fetch, process and execute instructions from the main memory. This is the core of every computer system.
- 10What is RAM?Random Access Memory is the main memory of a computer that stores data, applications, and the operating system that is in use. The RAM is volatile, as it requires power to remember its contents.
- 11What are the advantages and disadvantages of wireless networks?Advantages:
- Can connect to multiple devices without extra hardware
- There is less disruption to the building as no wires are installed
- It is cheap to install
Disadvantages:
- More open to hacking
- Slower than wired networks and the connection is not as stable
- Interference may occur and it will loose quality through walls and other obstructions - 12What is a VPN?A Virtual Private
Network: they are usually
set up on another network,
like the internet and are
used when working on
secure information held by
a company. - 13What is the internet?The internet is a global network that anyone can join. It is a WAN.
- 14What are bitmap images used for?Bitmap images are more commonly used in digital cameras, smartphones and online.
Informações
- Descrição
- GCSE I.C.T FlashCards sobre Computing, criado por Lara Coffin em 05-05-2015.
- Criado por
- Lara Coffin
- Visualizações
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- Histórico
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- Criado por Azraa · 5 mai 2015
- Copiado por Lara Coffin · 5 mai 2015
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