General Computer Test - 19

 

1. Why do magnetic tape drives for minicomputers use vacuum columns?

(a)    For quick acceleration and deacceleration of the tape

(b)    For immediate starting and stopping of the tape

(c)     To avoid stress in the tape

(d)    To provide extra tape length

(e)    None of these

Ans : (c)

2. What is the name of the visible silver rectangle which separates the take-up portion of the magnetic tape from the data recording portion?

(a)    Load maker

(b)    Load marker

(c)     Tape separator

(d)    Tape marker

(e)    None of these

Ans : (a)

3. The data on the tracks on a magnetic disk are written as

(a)    up or down

(b)    tiny magnetic spots

(c)     0 or 1

(d)    high or low voltage

(e)    None of these

Ans : (b)

4. Which memory is nonvolatile and may be written only once?

(a)    RAM

(b)    EE-ROM

(c)     RAM

(d)    PROM

(e)    None of these

Ans : (d)

5. Which of the following statements is wrong?

(a)    An EPROM can be programmed, erased and reprogrammed by the user with an EPROM programming instrument

(b)    Magnetic tape is non volatile

(c)     Magnetic core and semiconductor memories

(d)    RAM is a type of volatile memory

(e)    None of these

Ans : (c)

6. For a memory system, the cycle time is

(a)    same as the access time

(b)    longer than the access time

(c)     shorter than the access time

(d)    submultiple of the access time

(e)    None of these

Ans : (b)

7. The process of fetching and executing instructions, 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

Ans : (b)

8. 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

Ans : (d)

9. 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

Ans : (c)

10. Main memory contains

(a)    data

(b)    instructions

(c)     both (a) and (b)

(d)    either (a) and (b)

(e)    None of these

Ans : (c)

12. Which access method is used for obtaining a record from a cassette tape?

(a)    Direct

(b)    Sequential

(c)     Random

(d)    All of these

(e)    None of these

Ans : (b)

13. Two new types of semiconductor memories are

(a)    magnetic disks

(b)    charge-coupled devices

(c)     magnetic bubble memory

(d)    both (b) and (c)

(e)    None of these

Ans : (d)

14. 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

Ans : (d)

15. 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

Ans : (a)

16. 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

Ans : (b)

17. A lever used to control the movement of a cursor on a video screen is

(a)    keyboard

(b)    Joy stick

(c)     light pen

(d)    plotter

(e)    None of these

Ans : (b)

18. 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

Ans : (b)

19. The personal computers are also called

(a)    desk top computers

(b)    palmtop computers

(c)     advanced computers

(d)    portable computers

(e)    None of these

Ans : (a)

20. To set a register or counter to the all-zero- state is

(a)    rerun

(b)    reset

(c)     remote

(d)    release

(e)    None of these

Ans : (b)

21. 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

Ans : (d)

22. Which of the following is still useful for adding numbers?

(a)    EDSAC

(b)    ENIAC

(c)     Abacus

(d)    UNIVAC

(e)    None of these

Ans : (c)

23. Which unit decodes information and present to the user?

(a)    ALU

(b)    Storage unit

(c)     Output unit

(d)    Control unit

(e)    None of these

Ans : (c)

24. Main storage is also called

(a)    accumulator

(b)    control unit

(c)     register unit

(d)    memory

(e)    None of these

Ans : (d)

25. Most important advantage of an IC is its

(a)    easy replacement in case of circuit failure

(b)    extremely high reliability

(c)     reduced cost

(d)    low power consumption

(e)    None of these

Ans : (b)