Who invented vacuum tubes?

A. John Bardeen

B. William Shockley

C. Lee de Forest

D. All of above

You can do it
  1. A typical personal computer used for business purposes would have of RAM.
  2. Which of the following class of computers cannot support multiple users simultaneously?
  3. The full form of ALU is
  4. A dumb terminal has
  5. CD-ROM stands for
  6. Which of the following is used only for data entry and storage, and never for processing?
  7. Which of the following is first generation of computer?
  8. A computer program that converts an entire program into machine language is called a/an
  9. An example of a digital device can be
  10. Which of the following is the first computer to use Stored Program Concept?
  11. When was vacuum tube invented?
  12. Which of the following is a part of the Central Processing Unit?
  13. If in a computer, 16 bits are used to specify address in a RAM, the number of addresses will be
  14. ASCII stands for
  15. _______ computers are also called personal computers
  16. Computers with 80286 microprocessor is
  17. Floppy disks typically in diameter
  18. Which of the following is not a type of Software?
  19. When was Apple Macintosh II microcomputer introduced in the market?
  20. A name or number used to identify storage location devices?
  21. BCD is
  22. Which of the following devices can be sued to directly image printed text?
  23. First generation computers used_____ for memory
  24. What is a light pen?
  25. Where as a computer mouse moves over the table surface, the trackball is
  26. An application suitable for sequential processing is
  27. How many address lines are needed to address each machine location in a 2048 x 4 memory chip?
  28. The notable features like keyboards, monitors, GUI were developed in
  29. A program component that allows structuring of a program in an unusual way is known as
  30. The capacity of 3.5 inch floppy disk is