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When was vacuum tube invented?

A. 1900

B. 1906

C. 1910

D. 1880

Correct Answer : B.


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  1. Which of the following computer is not invented by J.P. Eckert and John Mauchly?
  2. Which of the following is true?
  3. MIS is designed to provide information needed for effective decision making by?
  4. Which term is used to describe RAM?
  5. Which of the following memories need refresh?
  6. Which part interprets program instructions and initiate control operations.
  7. The word length of a computer is measured in
  8. 174. When was the X window system born?
  9. Seek time is
  10. The scrambling of code is known as:
  11. A computer can solve more than one kind of problem. This is related to which of the following characteristics?
  12. The term gigabyte refers to
  13. Storage capacity of magnetic disk depends on
  14. Which of the following is associated with error detector?
  15. Which printer is very commonly used for desktop publishing?
  16. ________ computer is a medium sized computer
  17. Hackers
  18. Fifth generation computer is also known as
  19. The first electronic general purpose digital computer built by Eckert and Mauchly called ENIAC did not…
  20. UNIVAC is
  21. An integrated circuit is
  22. The most important advantage of a video disk is
  23. A language which is close to that used within the computer is
  24. Storage capacity of magnetic disk depends on
  25. Who designed the first electronics computer ENIAC?
  26. ________is defined as any crime completed through the use of computer technology.
  27. Properly arranged data is called
  28. The translator program used in assembly language is called
  29. The capacity of 3.5 inch floppy disk is
  30. The latest PC keyboards use a circuit that senses the movement by the change in its capacitance,