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Interview questions

What is going to be the value in each line?

  • typeof "bla"
  • typeof 0
  • typeof null
  • typeof NaN
  • typeof {}
  • typeof []
  • typeof function () {}

What will be the context? Why?

const o = {
  m() {
    console.log(this);
  }
};

const { m } = o;

o.m();
m();

In what order will be the numbers logged? Why?

console.log(1);
setTimeout(() => console.log(2), 10);
setTimeout(() => console.log(3), 0);
console.log(4);

What will be logged?

const o = {
  movie: 'Lion King',
  name: 'Pumba',
};

const p = Object.create(o);
p.name = 'Timon';

Object.keys(p).forEach(k => console.log(k));

What numbers will be logged? How to fix it?

for (i = 0; i < 5; i++) {
  setTimeout(() => console.log(i), 1000);
}

Explain the concept of Event Delegation

Explain the difference between debouncing and throttling

## Explain the concept of dependency injection

What practices do you know to fix circular dependencies?

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