Quizzes » Syntax (advanced)

1. Which of the following are legal variable names?

for

über

π

$$$

???

_

3x

_3x_

a+

_١٢٣_

a = 3

const a = 3

function () {}

function func() {}

{ get prop() {} }

if (x < 0) x = -x

a = 3

const a = 3

function () {}

function func() {}

{ get prop() {} }

if (x < 0) x = -x

function foo() {
  bar() // A
} // B

After which line(s) does one usually put semicolons?

Line A

Line B

function foo() {} // A
const foo = function () {} // B

After which line(s) does one usually put semicolons?

Line A

Line B

while (a > 0) a-- // A
while (a > 0) {
  a-- // B
} // C

Semicolon after:

Line A

Line B

Line C

function f() {
  return
  {
    a: 1 // (A)
  }
}
const result = f();

What happens?

assert.deepEqual(result, { a: 1 })

assert.deepEqual(result, undefined)

SyntaxError

const arr = Object.keys({a: 1, b: 2, c: 3})
[1].forEach(x => console.log(arr[x]))

Output: 'b'

TypeError

Correct answers: 0 out of 0