Report the running order — practice exercise

What you'll be asked to do

1. 1.Report the running orderexercise · easy · 10 min

   Use a timer to build the order first, second, third.

   Passes when: #out should show first second third.

2. 2.Show the result is not readyexercise · easy · 10 min · practice plan

   Read a value before the timer sets it and report what you get.

   Passes when: #out should show nothing yet.

3. 3.Use the value where it arrivesexercise · easy · 10 min · practice plan

   Report the value from inside the callback, once it exists.

   Passes when: #out should show arrived.

4. 4.Show a timer waits its turnexercise · easy · 10 min · practice plan

   Even a delay of zero runs after the current code, so report both in order.

   Passes when: #out should show now later.

5. 5.Count synchronously firstexercise · medium · 10 min · practice plan

   Finish a loop, then report from a timer that the loop went first.

   Passes when: #out should show loop then timer.

6. 6.Fix the value read too earlybug fix · easy · 8 min

   The value is read before the timer has set it.

   Passes when: #out should show arrived.

7. 7.Fix the order assumed to be top to bottombug fix · easy · 8 min · practice plan

   The timer callback runs after the code below it.

   Passes when: #out should show now later.

8. 8.Fix the result expected as a returnbug fix · easy · 8 min · practice plan

   A function that schedules work cannot return its result.

   Passes when: #out should show Ada.

9. 9.Fix the missing reportbug fix · easy · 8 min · practice plan

   The timer updates a variable but never shows it.

   Passes when: #out should show done.

10. 10.Fix the order built in the wrong placebug fix · easy · 8 min · practice plan

    The join happens before the timer has added its entry.

    Passes when: #out should show loop then timer.

Between them these tasks cover Async basics, Blocking and Ordering.

Looking for a different chapter? See every practice set, or switch to the interview theory questions.