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MCQs

Total Questions : 155 | Page 1 of 16 pages
Question 1. ----------- introduced Frequency Modulation for mobile communication systems in 1935.
  1.    Edwin Armstrong
  2.    Albert Einstein
  3.    Galileo Galilei
  4.    David Bohm
 Discuss Question
Answer: Option A. -> Edwin Armstrong
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. The modulation technique used for mobile communication systems during world war II was
  1.    Amplitude modulation
  2.    Frequency modulation
  3.    ASK
  4.    FSK
 Discuss Question
Answer: Option B. -> Frequency modulation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. The early FM push-to-talk telephone systems were used in
  1.    Simplex mode
  2.    Half duplex mode
  3.    Full duplex mode
  4.    None of the above
 Discuss Question
Answer: Option B. -> Half duplex mode
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. DECT stands for
  1.    Digital European Cellular Telex
  2.    Digitized Emergency Cellular Telephone
  3.    Digital European Cordless Telephone
  4.    Digital European Cellular Telephone
 Discuss Question
Answer: Option C. -> Digital European Cordless Telephone
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. Paging systems were based on
  1.    Simplex systems
  2.    Half duplex systems
  3.    Full duplex systems
  4.    None of the above
 Discuss Question
Answer: Option A. -> Simplex systems
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. Paging systems could be used to
  1.    Send numeric messages
  2.    Send alphanumeric messages
  3.    Voice message
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Carrier frequency of a TV remote control is in the range
  1.    of Infra red
  2.    < 100 MHz
  3.    < 1 GHz
  4.    < 2 GHz
 Discuss Question
Answer: Option A. -> of Infra red
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Garage door opener is a
  1.    Transmitter
  2.    Receiver
  3.    Transceiver
  4.    None of the above
 Discuss Question
Answer: Option A. -> Transmitter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. World's first cellular system was developed by
  1.    Nippon Telephone and Telegraph (NTT)
  2.    Bellcore and Motorola
  3.    AT&T Bell Laboratories
  4.    Qualcomm
 Discuss Question
Answer: Option A. -> Nippon Telephone and Telegraph (NTT)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Half duplex system for communication has
  1.    Communication in single direction
  2.    Communication in single direction at a time
  3.    Communication in both directions at the same time
  4.    None of the above
 Discuss Question
Answer: Option B. -> Communication in single direction at a time
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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