Flashcards
Computer Science Revision 2
Cards in this deck (22)
- 1What does CPU stand for?Central Processing Unit
- 2If a CPU has a clock speed of 4GHz, how many instructions can be carried out per second?4 billion
- 3If a CPU has a clock speed of 2.4MHz, how many instructions can be carried out per second?2.4 million
- 4What does the term 'core' refer to?The number of processors contained within the system.
Eg - Quad Core = Four Processors - 5What is the purpose of cache memory and where is it located?The cache memory temporarily stores instructions from the main memory. It sits between the CPU and the main memory.
- 6What is the Fetch, Decode, Execute Cycle?The processor gets an instruction from the main memory, woks out what the instruction means and then carries out the instruction.
- 7HDD is an example of what type of storage?Magnetic storage
- 8CD stands for...?Compact Disk
- 9What is the smallest unit of storage, nibble, bit or byte?Bit
- 10RAM is a type of main memory. True or false?True.
- 11RAM is volatile. What does volatile mean?When the power is switched off, the contents of the RAM are lost.
- 12Give some examples of devices that contain flash memory -Cell phones
Digital Cameras
Printers
MP3 playes - 13Name 3 logic gates -NOT gates
AND gates
OR gates - 14What do NOT gates do?NOT takes one bit as an input and gives the opposite as an output.
Eg - Input: 1, Output: 0 - 15If I input 1 to a NOT gate, what will the output be?0
- 16What does a NOT gate look like?
- 17What do AND gates do?AND gates take two bits as inputs. If both inputs are 1, then the output is 1. Otherwise, the output is 0.
- 18If I input a 1 and a 0 to an AND gate, what will the output be?0
- 19If I input a 0 and a 0 to an AND gate, what will the output be?0
- 20If I input a 1 and a 1 to an AND gate, what will the output be?1
- 21What does an AND gate look like?
- 22What do OR gates do?OR gates take two bits as inputs. If both inputs are 0 then the output is 0. Otherwise, the output is 1.