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Flashcards

Computer science

Oliver Muncaster Inglês 45 flashcards

Flashcards do conjunto (45)

  1. 1What is an embedded system?Embedded systems are computers built into other computer systems.
  2. 2What is the CPU?The central processing unit
  3. 3What does the CPU do?Process' data across a computer system
  4. 4What is the CU?The control unit
  5. 5What does the CU do?execute program instructions by following the fetch-decode-execute cycle.
  6. 6What is the ALU?The Arithmetic Logic Unit
  7. 7What does the ALU do?It does all the calculations it completes simple addition and subtraction, compares the size of numbers and can do multiplications and divisions using repeated addition and subtraction.
  8. 8What is cache?Very fast memory in the CPU Its slower than the registers but faster than RAM,
    It stores regularly used data so that the CPU can access it quickly the next time it’s needed.
  9. 9What is the MDR?Main Data Register
  10. 10What is the MAR?Main Address Register
  11. 11What does the MDR do?The MDR stores actual data that is being processed at that time the MDR acts as a buffer and hold data that is copied from RAM
  12. 12What does the MAR do?The MAR holds the address of the current instruction being executed.
  13. 13no.1 Factors affecting the CPU in hertz ?Clock Speed
  14. 14No.2 Factors affecting the CPU linked on a single chip.Cores
  15. 15No.3 Factors affecting the CPU dependant on size?Cache
  16. 16How many bits can fit in a byte?8 bits
  17. 17How many GigaBytes fit in a TerraByte1000 GigaBytes
  18. 18What is RAM?Random Access Memory
  19. 19What is ROM?Read Only Memory
  20. 20What does the RAM do?The RAM takes in parts of the operating system.
  21. 21What does the ROM do?The ROM stores the start instructions on the BIOS being non volatile.
  22. 22What are the BIOS?Basic Input Output systems
  23. 23What are the to online secondary storage's?Hard Disk Drive and Solid State Drive.
  24. 24What are the four offline secondary storage's?Compact disk E.g. CD, DVD, Blu ray
    USB flash drive
    Removable HDD
    Magnetic Tape
  25. 25What is the SSD?Solid State Drive
  26. 26What is the HDD?Hard Disk Drive
  27. 27Name all 3 storage methods?Magnetic
    Optical
    Solid State
  28. 28How much can a CD hold?720MB
  29. 29How much can a DVD hold?8.4GB
  30. 30How much can a Blu Ray hold50GB
  31. 31How much can a SSD hold?100GB- 16TB
  32. 32How much can a HDD hold?232.88GB
  33. 33What is meant by volatile?Volatile is were a piece of storage retains data only as long as there is a power supply connected to the computer.
  34. 34What is meant by Non volatile?A type of computer memory that can retrieve stored information even after having been power cycles for example the instructions to boot up a computer.
  35. 35What does <- mean?Less than
  36. 36What does >- mean?Greater than
  37. 37What does >= mean?Less than or equal to
  38. 38What does <= mean?Greater than or equal to
  39. 39What does != mean?Not equal to
  40. 40What does == mean?Equal to
  41. 41What is 2 Gigahertz = in cycles2 billion cycles per second
  42. 42What is L1 cache?It is extremely fast however is small (2-64KB) and is located very close to the processor
  43. 43What is L2 cache?It is fairly fast and medium sized (256KB-2MB) and is fairly close to the processor.
  44. 44What is L3 cache?It is relatively large (4MB-50MB) but runs the slowest and is close to the RAM.
  45. 45—

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FlashCards sobre Computer science, criado por Oliver Muncaster em 10-07-2019.
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