Question 1 – Correct descriptions of a broadcast receiver

✔️ An event handler that responds to broadcast announcements
❌ A component that runs in the background to perform long-running operations
❌ A component that defines a user-facing operation
❌ A message that describes an action to perform

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Question 2 – System services involved in routing broadcast intents

✔️ Activity Manager Service
❌ Telephony Manager Service
❌ Window Manager Service
❌ Download Manager Service

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Question 3 – What can be done in onReceive()

❌ Bind to a service
✔️ Pop up toast messages
❌ Show a dialog
✔️ Start other Android components
❌ Register other receivers
✔️ Create status bar notifications

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Question 4 – Types of broadcast mechanisms

❌ Static
✔️ Ordered
✔️ Normal
❌ Async
✔️ Sticky
❌ Dynamic

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Question 5 – Why broadcasting intents raises security issues

✔️ The intent namespace is global
✔️ An app can send an intent to any receiver
✔️ sendBroadcast() allows any other app to receive broadcast intents
❌ onReceive() runs on the UI thread

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Question 6 – Differences between PingPongReceivers & PingPongReceiversEx

❌ PingPongReceivers uses toasts instead of notification bar
✔️ PingPongReceiversEx uses toasts instead of notification bar
✔️ PingPongReceivers uses setPackage() but Ex app does not
✔️ PingPongReceivers PongReceiver runs in different process; Ex runs in same

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Question 7 – Capabilities of LocalBroadcastManager

❌ Uses the Activity Manager Service
✔️ Optimizes intra-app communication (no cross-process)
✔️ Enhances app security (only in-app communication)
❌ Allows background long-running operations

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Question 8 – Differences between ImageDownloaderBRD vs ImageDownloaderBRS

❌ BRS uses LocalBroadcastManager, BRD uses AMS
❌ BRS receiver runs in different process
❌ BRS uses SharedPreferences and BRD uses boolean
✔️ BRS uses AMS, BRD uses LocalBroadcastManager

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📊 Summary Table

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