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android telephony manager interview questions and answers

1
Which of the following can be accomplished by using the TelephoneNumberUtil class?
  1. Save a phone number to the contacts in the phone device.
  2. Retrieve a phone number from the contacts in the phone device.
  3. Delete a phone number from the contacts in the phone device.
  4. Format an international telephone number.
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2
How to handle call interruption scenarios, in an android application?
  1. use TelephonyManager
  2. use PhoneStateListener
  3. we have to use both option 1 & 2
  4. none of the above
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4
In TelephonyManager class, which of the below is not a call state?
  1. CALL_STATE_RINGING
  2. CALL_STATE_OFFHOOK
  3. CALL_STATE_ONHOOK
  4. CALL_STATE_IDLE
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5
Which of the following are true about PhoneStateIntentReceiver.notifyPhoneCallState?
  1. notifyPhoneCallState has to be called if your application wishes to receive a notification about an incoming phone call.
  2. notifyPhoneCallState is a call back function that is called when the call state changes.
  3. notifyPhoneCallState is called to initiate a call from the device.
  4. notifyPhoneCallState is used to send notifications about call states.
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