Keywords

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CPU
The Central Processing Unit that contains the processor, main memory and cache memory.
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Clock Speed
Measured in hertz or cycles per second, the clock speed represents how many instructions per second the processor can execute.
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Multi-Core Processor
The component in the computer that fetches, decodes and executes the instructions.
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RAM
Random Access Memory: a type of memory that is read-write and volatile. Used for main memory.
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ROM
Read Only Memory: memory that is hard-coded at the time of manufacture. Stores the startup program, called bootstrap loader.
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Dual-Core / Quad-Core
A CPU that contains multiple processor components (cores) that can operate independently to process more than one task at a time.
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Fetch-Execute Cycle
The process by which a program is run: instructions are stored in main memory (RAM), fetched by the processor one at a time, decoded and executed.
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Cache Memory
High speed memory in the CPU that is used to store a copy of frequently ised instructions and data. Faster access speed than main memory (RAM).
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Processor
The component in the computer that fetches, decodes and executes instructions.
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Volatile
Memory that loses its contents when the power is turned off. E.g. main memory (RAM)
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Non-Volatile
Memory that does not lose its contents when the power is turned off. E.g. hard disk
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Virtual Memory
Part of the hard disk that is configured to behave as an extension to main memory (RAM).
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Flash Memory / Solid State
Secondary storage which has no moving parts. Used in memory sticks, cameras and phones.
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Optical Storage Devices
Secondary storage that is read by using lasers such as CDs and DVDs.
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Magnetic Storage Devices
Secondary storage such as hard disks, tapes and floppy disks.
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Secondary Memory
Long term, non-volatile storage media such as hard disks, memory sticks, magnetic tapes, DVDs and CDs.
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Logical Operators
AND...OR...NOT
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Truth Table
A table that shows all the possible combinations of inputs and their logical output value.
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Boolean Expression
An expression that is either true or false.
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User Interface
The method of communication between the computer and its user.
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Virus
A program that is installed on a computer without you knowledge or permission with the purpose of doing harm.
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Antivirus Software
A utility program that prevents harmful programs being installed and important files being changed.
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Firewall
A utility program that prevents unauthorised access to computers or a LAN from the internet and controls what sites computers on the LAN can access.
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Off-The-Shelf software
Software that can be purchased from a High Street or online store. Not Custom-Written.
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Custom Written / Bespoke Software
Software that is written for one customers specific requirements.
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Bit
A single binary digit: 1 or 0.
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Byte
8 bits
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Nibble
4 bits
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Kilobyte
1024 bytes
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Megabyte
1024 kilobytes
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Gigabytes
1024 Megabytes
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Terabyte
1024 Gigabytes
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Database
A persistent organized store of data.
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LAN
Local Area Network: a collection of computers and peripheral devices connected together within a single site.
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WAN
Wide Area Network: a collection of computers and LANs connected together ovwer a geographically remote area, using leased infrastructure.
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Hub
A hardware device that provides connectivity to a LAN cable.
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Switch
A hardware device that is similar to a hub but is built-in intelligence to direct traffic to the right place.
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Other cards in this set

Card 2

Front

Measured in hertz or cycles per second, the clock speed represents how many instructions per second the processor can execute.

Back

Clock Speed

Card 3

Front

The component in the computer that fetches, decodes and executes the instructions.

Back

Preview of the back of card 3

Card 4

Front

Random Access Memory: a type of memory that is read-write and volatile. Used for main memory.

Back

Preview of the back of card 4

Card 5

Front

Read Only Memory: memory that is hard-coded at the time of manufacture. Stores the startup program, called bootstrap loader.

Back

Preview of the back of card 5
View more cards

Comments

CookieJarEmpty

Pretty vague clues- 9 down isn't like a hub at all and 5 across is just obscure; not what the clue makes it out to be at all.

Strata-Ace

PUT DUAL CORE AND QUAD CORE IN SEPARATE SPACES

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