INFO5126_Threading Flashcards
_______ tend to be more expensive and slow because they involve ______-level operations
- Threads
- kernel
_______ run parallel on the system
Threads
_______ are lightweight and efficient with _______ overhead
- Coroutines
- minimal
_______ allows the scheduling of work to run using scheduling windows.
Work Manager
What is the main android thread referred to as?
UI Thread
What interface can be used to declare a thread class?
Runnable
What class should your class inherit from to implement a thread?
Thread
What are the 2 ways to create a thread in android?
- Class inherits from Thread
- Class implements Runnable interface
What function do you implement/override for a thread?
run()
What does currentThread() return?
Reference to the currently executing thread
What function is used to get a thread’s name?
getName()
What should you never do with a worker thread?
Update user interface elements
A coroutine is a _______ design pattern
Concurrency
A _______ keeps track of all your coroutines, and it can cancel all of the coroutines started in it.
CoroutineScope
A _______ models a cancellable workflow with multiple states and a life-cycle
Job
What are the 3 types of dispatchers?
- Main
- IO
- Default
What are the 2 ways to start a coroutine?
- launch
- async
Which way do you launch a coroutine if you want a result?
async
Which way of launching a coroutine is “fire and forget”?
launch
What makes a function main-safe?
Doesn’t block UI updates
What function is used to move a coroutine out of the main thread?
withContext()
What keyword is used on a function to enforce that a function is called from within a coroutine?
suspend
A cancelled scope _______ create more coroutines
cannot
What is a Job?
Handle to a coroutine
What permission is required to make network requests?
INTERNET
What are the 3 types of work WorkManager handles?
- Immediate
- Long Running
- Deferrable
What function is overridden for WorkManager?
doWork()
What class is extended to define work for the WorkManager?
Worker
What is the base class for specifying parameters for work that should be enqueued by the WorkManager?
WorkRequest
