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What is a light pen?

A. Mechanical Input device

B. Optical input device

C. Electronic input device

D. Optical output device

You can do it
  1. The qualitative or quantitative attribute of a variable or set of variables is termed as
  2. You use a(n) ________, such as a keyboard or mouse, to input information
  3. A program that converts computer data into some code system other than the normal one is known as
  4. The most important advantage of a video disk is
  5. A set of information that defines the status of resources allocated to a process isA) Process control
  6. A type of channel used to connect a central processor and peripherals which uses multiplying is known…
  7. Which of the following is the coding of data so that is can't be easily understood if intercepted.
  8. Regarding a VDU, Which statement is more correct?
  9. Where are data and programme stored when the processor uses them?
  10. The terminal device that functions as a cash register, computer terminal, and OCR reader is the:
  11. What is the main difference between a mainframe and a super computer?
  12. ASCII and EBCDIC are the popular character coding systems. What does ASCII stand for?
  13. What are the three decisions making operations performed by the ALU of a computer?
  14. To move a copy of file from one computer to another over a communication channel is called?
  15. Instruction in computer languages consists of
  16. A self replicating program, similar to a virus which was taken from a 1970s science fiction novel by…
  17. Reading data is performed in magnetic disk by
  18. UNIVAC is
  19. A general purpose single-user microcomputer designed to be operated by one person at a time is
  20. The device used to carry digital data on analogue lines is called as
  21. Networking such as LAN, MAN started from
  22. Which of the following disk is fixed disk?
  23. Magnetic disk is an example of
  24. ________ computer is a medium sized computer
  25. VDU is also called
  26. The computer size was very large in
  27. Machine language is
  28. Which of the following statement is false?
  29. Which device can understand difference between data & programs?
  30. A computer cannot 'boot' if it does not have the