21 September 2011

Cell Phone Mechanism Multiple Choice Questions (Part - I)


1. The basic concept of cellular phones began in _________
    a) 1945     b) 1946      c) 1947       d) 1948

2. Who is the inventor of cell phone?
    a) Martin Cooper     b) Joel Engel     c) Robert    d) Willson

3. The maximum permissible transmission rate of message is directly proportional to ____________
   a) signal voltage    b) signal current    c) signal power    d) channel noise

4. The maximum permissible transmission rate of message is inversely proportional to ____________
   a) signal voltage    b) channel noise    c) signal power    d) signal current

5. Efficiency in data communication valued through _________ properties.
    a) Delivery    b) Accuracy     c) Timeliness    d) both a, b & c

6. The message source is the __________
    a) transmitter  b) receiver   c) conductor     d) none

7. The destination is the _________
    a) transmitter   b) receiver   c) conductor     d) none

8. A channel whose direction of transmission is unchanging is referred to as a _____________  channel.
   a) Simplex     b) Half-duplex     c) Full-duplex     d) Multi-duplex

9. ___________ channel is a single physical channel in which the direction may be reversed.
    a) Simplex     b) Half-duplex     c) Full-duplex     d) Multi-duplex

10. _____________ channel allows simultaneous message exchange in both directions.
  a) Simplex     b) Half-duplex     c) Full-duplex     d) Multi-duplex

11. Propagation of signals across a communication medium is called __________
      a) signaling    b) data     c) transmission   d) signals 

12. Communication of data achieved by the processing of signals is called _______________
      a) signaling    b) data     c) transmission   d) signals
13. A collection of facts in raw forms that become information after processing is called __________
     a) signaling    b) data     c) transmission   d) signals

14. A specific set of communication rules is called _____________
      a) protocol     b) character sets     c) Sequencing of messages    d) none

15. Most first generation cellular systems such as AMPS use __________
      a) analog AM    b) analog FM    c) both a and b    d) none