David Nguyen

Knowledge check: Introduction to Functional Programming in Javascript

Knowledge check: Introduction to Functional Programming in Javascript

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David Nguyen
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1 min read

  1. What will print out when the following code runs?

     var globalVar = 77;

 function scopeTest() {
     var localVar = 88;
 }

 console.log(localVar);

    • 77

    • 88

    • null

    • ReferenceError: localVar is not defined

  2. Variables declared using const can be reassigned.

    • true

    • false

  3. When a function calls itself, this is known as _____________.

    • Recursion

    • Looping

    • Higher-order Function

  4. What will print out when the following code runs?

     function meal(animal) {
   animal.food = animal.food + 10;
 }

 var dog = {
   food: 10
 };
 meal(dog);
 meal(dog);

 console.log(dog.food);

    • 10

    • 20

    • 30

    • 40

  5. What value will print out when the following code runs?

     function two() {
   return 2;
 }

 function one() {
   return 1;
 }

 function calculate(initialValue, incrementValue) {
   return initialValue() + incrementValue() + incrementValue();
 }

 console.log(calculate(two, one));

    • 1

    • 2

    • 3

    • 4

JavaScript