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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 type of computers uses the 8-bit code called EBCDIC?
  2. What was the first computer to perform all calculation using electronics rather than wheels, ratchets,…
  3. A set of information that defines the status of resources allocated to a process is
  4. Help Menu is available at which button?
  5. What type of virus uses computer hosts to reproduce itself?
  6. A device, which is not connected to CPU, is called as ________
  7. The output quality of a printer is measured by
  8. The binary system uses powers of
  9. Find out who is not the inventor of transistors among following names
  10. The term referring to evacuating the content of some part of the machine is known as
  11. Which was the world's first minicomputer and when was it introduced?
  12. Which of the following is machine independence program?
  13. Who suggested Stored Program Concept
  14. An operating system intended for use on microprocessor based systems that support a single user is
  15. Which access method is used for obtaining a record from a cassette tape?
  16. Which of the following require large computers memory?
  17. The symbols used in an assembly language are
  18. On-line real time systems become popular in ________ generation
  19. Which of the following is used as a primary storage device?
  20. To produce high quality graphics (hardcopy) in color, you would want to use a/n
  21. Punched cards were first introduced by
  22. Web cam is an
  23. Which 8-bit chip was used in many of today's TRS-80 computers?
  24. Who invented EDSAC?
  25. Perforated paper used as input of output media is known as
  26. Computers with 80286 microprocessor is
  27. The qualitative or quantitative attribute of a variable or set of variables is termed as
  28. A compiler means
  29. A memory that does not change its contents without external causes is known as
  30. The tracks on a disk which can be accessed without repositioning the R/W heads is