What is a light pen?

A. A Mechanical Input device

B. Optical input device

C. Electronic input device

D. Optical output device

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

You can do it
  1. Which is a semi conductor memory?
  2. Which language is directly understood by the computer without translation program?
  3. When was vacuum tube invented?
  4. In 1999, the Melissa virus was a widely publicised:
  5. Perforated paper used as input of output media is known as
  6. A system is
  7. Which part of the computer is used for calculating and comparing?
  8. Computers built before the First Generation of computers were:
  9. Who developed a mechanical device in the 17th century that could add, subtract, multiple, divide and…
  10. Which company is the biggest player in the microprocessor industry?
  11. Symbolic logic was discovered by
  12. MSI is the abbreviation of
  13. A computer program that converts assembly language to machine language is
  14. Why ABC computer is called so?
  15. The symbols used in an assembly language are
  16. Artificial Intelligence is associated with which generation?
  17. UNIVAC was a first generation computer. What is its full form?
  18. The translator program used in assembly language is called
  19. Which one of the following input device is user- programmable?
  20. EBCDIC can code up to how many different characters?
  21. Which is not a computer of first generation?
  22. Which of the following devices can be sued to directly image printed text?
  23. Floppy disks typically in diameter
  24. Which computers used operating systems by Microsoft?
  25. What is the path from which data flow in a computer system is known as
  26. The computer that process both analog and digital is called
  27. Access time is
  28. Each set of Napiers bones consisted of ______ rods.
  29. Note book, laptop, palm, hand-held computers are coming under the category of________ computer
  30. The ALU of a computer responds to the commands coming from