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What is a light pen?

A. A Mechanical Input device

B. Optical input device

C. Electronic input device

D. Optical output device

You can do it
  1. Which statement is valid about computer program?
  2. The arranging of data in a logical sequence is called
  3. An application program that helps the user to change any number and immediately see the result of that…
  4. High density double sided floppy disks could store _____ of data
  5. Which is used for manufacturing chips?
  6. Which operation is not performed by computer
  7. What is the most common tool used to restrict access to a computer system?
  8. An index register that is automatically incremented or decremented with each use is
  9. IBM 1401 is
  10. Which of the following was a special purpose computer?
  11. First generation computers used_____ for memory
  12. Microprocessors as switching devices are for which generation computers?
  13. Which of the following is not electro-mechanical computer?
  14. The accuracy of the floating-point numbers representable in two 16-bit words of a computer is approximately
  15. What is the main difference between a mainframe and a super computer?
  16. Which of the following is an example of fifth generation computer?
  17. Today's computer giant IBM was earlier known by different name which was changes in 1924. What was that…
  18. A single packet on a data link is known as
  19. Which of the following statement is false?
  20. Any storage device added to a computer beyond the immediately usable main storage is known as
  21. Which of the printers used in conjunction with computers uses dry ink powder?
  22. The BIOS is the abbreviation of ________.
  23. The personal computer industry was started by
  24. EBCDIC stands for
  25. Floppy disks typically in diameter
  26. The least significant bit of the binary number, which is equivalent to any odd decimal number, is:
  27. ________are specific to users' needs
  28. The accuracy of the floating-point numbers representable in two 16-bit words of a computer is approximately
  29. RAM is used as a short memory because it is
  30. The data recording format in most of the modern magnetic tape is