Mobile phone MCQ2

What is the unit of measurement for the inductance of a coil

• Ohm

• Watt

• Henry

• Farad

What is the recommended first step to consider when an app on an Android phone isn't working?

• 1. Restarting the phone

• 1. Re-installing the app

• 1. Deleting the app

• 1. Clearing the cache

Checking for Android system updates is the recommended first step for a phone that _____.

• 1. Is restarting on its own

• 1. not allowing the user to log in to Google

• 1. contains an app that isn't working properly

• 1. can't complete two-step verification

The early FM push-to-talk telephone systems were used in

• Simplex mode
  

• Half duplex mode
  

• Full duplex mode

• None of the above

DECT stands for

• Digital European Cellular Telex
  

• Digitized Emergency Cellular Telephone
  

• Digital European Cordless Telephone
  

• Digital European Cellular Telephone

 World’s first cellular system was developed by

• Nippon Telephone and Telegraph (NTT)
  

• Bellcore and Motorola

• AT&T Bell Laboratories

• Qualcomm

Paging systems were based on

• Simplex systems
  

• Half duplex systems
  

• Full duplex systems
  

• None of the above

Paging systems could be used to

• Send numeric messages

• 
  b. Send alphanumeric messages
  

• Voice message
  

• d. All of the above

Garage door opener is a

• Transmitter
  

• Receiver
  

• Transceiver

• None of the above

Carrier frequency of a TV remote control is in the range

• Infra red
  

• < 100 MHz

• < 1 GHz
  

• < 2 GHz