INFO5126_Threading

Question 1

_______ tend to be more expensive and slow because they involve ______-level operations

Answer 1

1. Threads
2. kernel

Question 2

_______ run parallel on the system

Answer 2

Threads

Question 3

_______ are lightweight and efficient with _______ overhead

Answer 3

1. Coroutines
2. minimal

Question 4

_______ allows the scheduling of work to run using scheduling windows.

Answer 4

Work Manager

Question 5

What is the main android thread referred to as?

Answer 5

UI Thread

Question 6

What interface can be used to declare a thread class?

Answer 6

Runnable

Question 7

What class should your class inherit from to implement a thread?

Answer 7

Thread

Question 8

What are the 2 ways to create a thread in android?

Answer 8

1. Class inherits from Thread
2. Class implements Runnable interface

Question 9

What function do you implement/override for a thread?

Answer 9

run()

Question 10

What does currentThread() return?

Answer 10

Reference to the currently executing thread

Question 11

What function is used to get a thread’s name?

Answer 11

getName()

Question 12

What should you never do with a worker thread?

Answer 12

Update user interface elements

Question 13

A coroutine is a _______ design pattern

Answer 13

Concurrency

Question 14

A _______ keeps track of all your coroutines, and it can cancel all of the coroutines started in it.

Answer 14

CoroutineScope

Question 15

A _______ models a cancellable workflow with multiple states and a life-cycle

Answer 15

Job

Question 16

What are the 3 types of dispatchers?

Answer 16

1. Main
2. IO
3. Default

Question 17

What are the 2 ways to start a coroutine?

Answer 17

1. launch
2. async

Question 18

Which way do you launch a coroutine if you want a result?

Answer 18

async

Question 19

Which way of launching a coroutine is “fire and forget”?

Answer 19

launch

Question 20

What makes a function main-safe?

Answer 20

Doesn’t block UI updates

Question 21

What function is used to move a coroutine out of the main thread?

Answer 21

withContext()

Question 22

What keyword is used on a function to enforce that a function is called from within a coroutine?

Answer 22

suspend

Question 23

A cancelled scope _______ create more coroutines

Answer 23

cannot

Question 24

What is a Job?

Answer 24

Handle to a coroutine

Question 25

What permission is required to make network requests?

Answer 25

INTERNET

Question 26

What are the 3 types of work WorkManager handles?

Answer 26

1. Immediate
2. Long Running
3. Deferrable

Question 27

What function is overridden for WorkManager?

Answer 27

doWork()

Question 28

What class is extended to define work for the WorkManager?

Answer 28

Worker

Question 29

What is the base class for specifying parameters for work that should be enqueued by the WorkManager?

Answer 29

WorkRequest