LinkedIn Assessments - JavaScript 2019-2021
- ~15 minutes duration
- 70th percentile required to pass and get a badge
- Retry in 3 months if you don’t pass
button.addEventListener('click', function(e) {
button.className = 'clicked';
}, false);- e.preventDefault();
<p class="pull">Lorem Ipsum </p>
- document.querySelector(".pull");
let rate = 100;let modal = document.querySelector('#results');
setTimeout(function() {
modal.classList.remove('hidden');
}, 10000);
console.log('Results shown');- Immediately
- var student = new Person();
- When you want your code to choose between multiple options.
- A for statement is generic but a forEach statement can be used only with an array.
addTax(50);var Storm = function () {};
Storm..precip = 'rain';
var WinterStorm = function () {};
WinterStorm. = new Storm();
WinterStorm..precip = 'snow';
var bob = new WinterStorm();
console.log(bob.precip);- 'snow'
- It returns a reference to a variable in its parent scope.
"use strict";
function logThis() {
this.desc="logger";
console.log(this);
}
new logThis();- logThis { desc: 'logger' }
console.log(typeof(42));- 'Number'
- !==
let rate = 100;var student = new Person();roadTypes[2]- target
JSON.parse()- When you want your code to choose between multiple options
for(var i=0; i<5; i++){
console.log(i);
}- 01234
- Generator
for (var i=1; i<=4; i++){
setTimeout(function(){
console.log(i);
}, i*10000);
}for (var i = 1; i <= 4; i++) {{function(j) {setTimeout(function() {console.log(j);}, j * 1000);})(i)};
let discountPrice = function(price) { return price * 0.85; };
- /\d\d:\d\d:\d\d/
let arr = [];- 2
- instanceof
var start = 1;
if (start === 1) {
let end = 2;
}- block
const x = 6 % 2;
const y = x ? 'One': 'Two';- Two
- throw
- The defer attribute will asynchronously load the scripts in order
var a;
var b = (a = 3) ? true: false- The condition in the ternary is using the assignment operator.
<p class="pull">lorem ipsum</p>document.querySelector('.pull');
let answer = true;
if (answer === false) {
return 0;
} else {
return 10;
}- 10
var start = 1;
function setEnd() {
var end = 10;
}
setEnd();
console.log(end);- ReferenceError
function sayHello() {
console.log("hello");
}
console.log(sayHello.);- undefined
- Set
var a;
var b = (a = 3) ? true: false- The condition in the ternary is using the assignment operator.
class X{
get Y(){return 42;}
}
var x = new X();- x.Y
sum(10,20);
diff(10,20);
function sum(x,y){
return x+y;
}
let diff = function(x,y){
return x-y;
}- ReferenceError
- Arguments
[] == [];- False
- Side effects are not allowed.
- instanceof
const x = 6 % 2;
const y = x ? 'One' : 'Two';- Two
let answer = true;
if (answer === false) {
return 0;
} else {
return 10;
}- 10
function printA() {
console.log(answer);
var answer = 1;
}
printA();
printA();- undefined then undefined
- to start tasks that might take some time without blocking subsequent tasks from executing immediately
