Why are vacuum tubes also called valves?

A. Because they can amplify the weak signals and make them strong

B. Because they can stop or allow the flow of current

C. Both of above

D. None of above

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Which statement is valid about computer program?
  2. To prevent the loss of data during power failures, use a(n):
  3. Which of the following is considered first computer in the world?
  4. A logic bomb that was created to erupt on Michelangelos birthday is an example of a:
  5. What is required when more than one person uses a central computer at the same time?
  6. FORTRAN is
  7. MAN stands for
  8. Before a disk can be used to store datA. It must be
  9. Which of the following programming language started from second generation?
  10. Which computer was considered the first electronic computer until 1973 when court invalidated the patent?
  11. Which is not a computer of first generation?
  12. Personal computers used a number of chips mounted on a main circuit board. What is the common name for…
  13. When did John Napier develop logarithm?
  14. A device invented by Dr. Bobeck in 1966, for mass storage of data is
  15. The personnel who deals with the computer & its management put together are called
  16. Which is not a comptuer of first generation?
  17. Which of the following is not a valid size of a Floppy Disk?
  18. A ________ is a microprocessor -based computing device.
  19. What is the other name for programmed chip?
  20. Which device can understand difference between data & programs?
  21. Which of the following require large computers memory?
  22. What type of control pins are needed in a microprocessor to regulate traffic on the bus, in order to…
  23. Computers with 80286 microprocessor is
  24. Which of the following require large computers memory?
  25. Registers, which are partially visible to users and used to hold conditional, are known as
  26. Which is the first electronic digital computer?
  27. Intel corporation produces chips for which computers?
  28. The full form of ALU is
  29. A systems programming language for microcomputers in the Intel family is
  30. The BIOS is the abbreviation of .