Show dynamic typing — practice exercise

What you'll be asked to do

1. 1.Show dynamic typingexercise · easy · 10 min

   A variable holds a number then a string — report the final type.

   Passes when: #out should show string.

2. 2.Use a function as a valueexercise · easy · 10 min · practice plan

   Store a function in a variable, call it, and show the result.

   Passes when: #out should show called.

3. 3.Use a template literalexercise · easy · 10 min · practice plan

   Build the greeting "Hello Ada" with a template literal.

   Passes when: #out should show Hello Ada.

4. 4.Use an objectexercise · easy · 10 min · practice plan

   Read the title property from an object and show it.

   Passes when: #out should show Frontend.

5. 5.Use an array methodexercise · medium · 10 min · practice plan

   Double every number in [1,2,3] and join them with dashes.

   Passes when: #out should show 2-4-6.

6. 6.Fix the function that is never calledbug fix · easy · 8 min

   The function itself is shown instead of its result.

   Passes when: #out should show called.

7. 7.Fix the template literal quotesbug fix · easy · 8 min · practice plan

   Normal quotes do not interpolate the variable.

   Passes when: #out should show Hello Ada.

8. 8.Fix the wrong property namebug fix · easy · 8 min · practice plan

   The object has no such property, so this shows undefined.

   Passes when: #out should show Frontend.

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

   The arrow body uses braces without a return.

   Passes when: #out should show 2-4-6.

10. 10.Fix the typeof checkbug fix · easy · 8 min · practice plan

    This reports the type of the old value.

    Passes when: #out should show string.

Between them these tasks cover Dynamic typing, Functions as values and Template literals.

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