JS Interview questions

js-question1.js

await new Promise(resolve => setTimeout(() => resolve(5), 3000))

js-question2.js

const func = () =>
    Promise.resolve()
        .then(() => new Promise(resolve => setTimeout(() => resolve(10), 3000)))

await func();

js-question3.js

const promiseWithTimeout = (timeout) => new Promise(resolve => setTimeout(resolve, timeout));

const func1 = async () => await promiseWithTimeout(1000);

const func2 = async () => promiseWithTimeout(1000);

const func3 = () => promiseWithTimeout(1000);

const func4 = () =>
    promiseWithTimeout(1000).then(() => {
        promiseWithTimeout(1000);
    });

await func1();
await func2();
await func3();
await func4();
console.log('done')

js-question4.js

const promiseWithTimeout = (timeout) => new Promise(resolve => setTimeout(resolve, timeout));

promiseWithTimeout(1000)
    .then(() => { promiseWithTimeout(1000) })
    .then(() => promiseWithTimeout(1000))
    .then(() => { promiseWithTimeout(1000) })
    .then(() => promiseWithTimeout(1000))
    .then(() => console.log('done'))

js-question5.js

const array = ['1', '2', '3', '4'];

const appendString = ??

array.map(appendString('. place'));

// output: ['1. place', '2. place', '3. place', '4. place']

js-question6.js

const a = {
  name: 'Ivan'
};

const func1 = param => {
  param = {
    name: 'Josip'
  };
}


const func2 = param => {
  param.name = 'Petar';
}

func1();

func2();