David Nguyen

Knowledge check: Advanced JavaScript Features

Knowledge check: Advanced JavaScript Features

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David Nguyen
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1 min read

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

     const meal = ["soup", "steak", "ice cream"]
 let [starter] = meal;
 console.log(starter);

    • soup

    • ice cream

    • steak

  2. The for-of loop works for Object data types.

    • true

    • false

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

     let food = "Chocolate";
 console.log(`My favourite food is ${food}`);

    • My favourite food is Chocolate

    • My favourite food is ${food}

  4. What values will be stored in the set collection after the following code runs?

     let set = new Set();
 set.add(1);
 set.add(2);
 set.add(3);
 set.add(2);
 set.add(1);

    • 1, 2, 3, 2, 1

    • 1, 2, 3

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

     let obj = {
     key: 1,
     value: 4
 };

 let output = { ...obj };
 output.value -= obj.key;

 console.log(output.value);

    • 1

    • 2

    • 3

    • 4

  6. What value will be printed out when the following code runs?

     function count(...basket) {
     console.log(basket.length)
 }

 count(10, 9, 8, 7, 6);

    • 10, 9, 8, 7, 6

    • 1, 2, 3, 4, 5

    • 6

    • 5

JavaScript