Top 1000+ Solved Important Computer MCQs For Competitive Exams part-1 MCQ Questions Answer
Q. The process of fetching and executinginstructions, one at a time, in the order of increasing addresses is known as
a. instruction execution
b. straight line sequencing
c. instruction fetch
d. random sequencing
e. None of these
Q. Non-volatility is an important advantage of
a. CCD’s
b. magnetic tapes and disks
c. magnetic bubbles
d. both (b) and (c)
e. None of these
Q. The general range of speed in revolutions per minute (rpm) at which floppy disks rotate is
a. 2400-4700
b. 390-600
c. 150-250
d. 300-600
e. None of these
Q. Main memory contains
a. data
b. instructions
c. both (a) and (b)
d. either (a) and (b)
e. None of these
Q. Two new types of semiconductor memoriesare
a. magnetic disks
b. charge-coupled devices
c. magnetic bubble memory
d. both (b) and (c)
e. None of these
Q. The word ‘serial’ describes
a. an inexpensive card reader that reads one column at a time
b. a character-by-character transfer of data between an input/output or auxiliary storage unit and a channel
c. is a serial communication physical interface through which information transfers in or out one bit at a time
d. both (a) and (b)
e. None of these
Q. The largest of the four conceptual areas of storage is likely to be the
a. program area
b. output area
c. working area
d. input area
e. None of these
Q. In half-duplex data transmission
a. data can be transmitted in one direction only
b. data can be transmitted in both directions
c. data can be transmitted in both directions simultaneously
d. data cannot be transmitted
e. None of these
Q. A lever used to control the movement of acursor on a video screen is
a. keyboard
b. Joy stick
c. light pen
d. plotter
e. None of these
Q. In synchronous transmission data from various users
a. require header
b. do not require header
c. sometimes require header
d. All of these
e. None of these
Q. To set a register or counter to the all-zero- state is
a. rerun
b. reset
c. remote
d. release
e. None of these
Q. A device for entering X-Y co-ordinates is known as
a. card reader
b. cassette tape
c. multiplexer
d. joystick
e. None of these
Q. Which of the following is still useful for adding numbers?
a. EDSAC
b. ENIAC
c. Abacus
d. UNIVAC
e. None of these
Q. Which unit decodes information and presentto the user?
a. ALU
b. Storage unit
c. Output unit
d. Control unit
e. None of these
Q. Main storage is also called
a. accumulator
b. control unit
c. register unit
d. memory
e. None of these