Write a static method — practice exercise

What you'll be asked to do

1. 1.Write a static methodexercise · easy · 10 min

   Add a static double method and call it on the class.

   Passes when: #out should show 10.

2. 2.Add a static propertyexercise · easy · 10 min · practice plan

   Store a version on the class and report it.

   Passes when: #out should show 1.0.

3. 3.Count instancesexercise · easy · 10 min · practice plan

   Count how many users have been created.

   Passes when: #out should show 2.

4. 4.Write a factory methodexercise · easy · 10 min · practice plan

   Add a static origin method that returns a point at zero.

   Passes when: #out should show 0,0.

5. 5.Show instances cannot see staticsexercise · medium · 10 min · practice plan

   Report the type of a static method read from an instance.

   Passes when: #out should show undefined.

6. 6.Fix the static called on an instancebug fix · easy · 8 min

   A static method belongs to the class, not to instances.

   Passes when: #out should show 10.

7. 7.Fix the missing static keywordbug fix · easy · 8 min · practice plan

   Without static the method sits on instances instead of the class.

   Passes when: #out should show 1.0.

8. 8.Fix the counter stored per instancebug fix · easy · 8 min · practice plan

   An instance field gives each object its own count.

   Passes when: #out should show 2.

9. 9.Fix the factory that returns nothingbug fix · easy · 8 min · practice plan

   The static method builds a point but never returns it.

   Passes when: #out should show 0,0.

10. 10.Fix the static reading an instance propertybug fix · easy · 8 min · practice plan

    A static method has no instance, so it cannot read this.name.

    Passes when: #out should show a class method.

Between them these tasks cover static, Factory methods and Class properties.

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