Question 1 — What an Activity Is

❌ A message describing an action/event
❌ Background component
✔️ A component that defines a user-facing operation on the screen
❌ Event handler for broadcasts

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Question 2 — What a Hook Method Is

❌ Unnamed block of code
❌ Event handler for broadcasts
✔️ Used to customize framework classes with app-specific logic
❌ Smallest unit of execution

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Question 3 — Activity Lifecycle Hook Methods

❌ onBind() (Service hook)
❌ onReceive() (BroadcastReceiver hook)
✔️ onDestroy()
✔️ onResume()
✔️ onStart()
✔️ onPause()
✔️ onCreate()
✔️ onStop()

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Question 4 — startActivityForResult()

❌ Asynchronous + one-way
❌ Synchronous + two-way
❌ Synchronous + one-way
✔️ Asynchronous + two-way (starts activity, returns result later)

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Question 5 — Lifecycle Methods NOT Guaranteed in Low Memory

✔️ onDestroy()
✔️ onStop()
❌ onResume()
❌ onPause()

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Question 6 — System Services That Call Lifecycle Methods

✔️ Activity Manager Service
❌ Location Manager
❌ Notification Manager
❌ Window Manager

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Question 7 — What Happens When User Types in Keyboard

✔️ UI focus unchanged — no lifecycle callbacks
❌ onResume() called
❌ New activity created
❌ onStart() called

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Question 8 — What a Task Is

❌ Unit of execution
✔️ Group of activities user interacts with to perform a job
❌ Unnamed block of code
❌ Background component

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Question 9 — Activities in Concurrent Apps

✔️ UI-thread methods must be short + non-blocking
✔️ Long ops must use background threads
✔️ UI toolkit only accessed on UI thread
❌ Activities cannot be used concurrently

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Question 10 — HaMeR Framework Capabilities

❌ Handles async requests via intents (that’s IntentService)
❌ Background component
✔️ Enables background work + publishes results to UI thread without direct threading APIs
✔️ Enables background operations + UI-thread publishing

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📌 SUMMARY TABLE

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