book2-chap1-quiz.md

Quiz - YDKJS: Scope & Closures 1/5

Chapter 1: What is Scope?

Self-Evaluation

Section: Compiler Theory

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1. What are the three typical steps in a traditional compiled-language process?

your answer here

2. What does AST stands for?

your answer here

3. So, is JS interpreted or compiled? Explain why

your answer here

Section: Understanding Scope

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4. Once again: What's Scope?

your answer here

5. What are the main "characters" involved in the compilation process?

your answer here

6. Describe both the LHS and RHS look-up terms.

your answer here

7. Identify all the LHS and RHS look-ups for the following code snippet:

Snippet #1

function square(number) {
  return number * number;
}

function cube(number) {
  return number * square(number);
}

const result = cube(3);

total LHS look-ups:

your answer here

total RHS look-ups:

your answer here

Section: Nested Scope

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8. What are the rules for traversing a nested Scope?

your answer here

9. What would be the output for the following snippets?

Snippet #2

g = 10;

function foo(a) {
  function bar(a, b) {
    var c = 5;

    function baz(d) {
      return d + c + b + a + g;
    }

    return baz(5);
  }

  return bar(10, a + 5);
}

var g;

console.log(foo(15));

your answer here

Snippet #3

(function foo(x) {
  function bar(y) {
    function baz(z) {
      w = x * y * z;

      return x + y + z;
    }

    return baz(4);
  }

  return bar(4);
})(4);

console.log(w);

your answer here

Section: Errors

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10. When does a ReferenceError happen?

your answer here

11. When does a TypeError happen?

your answer here

12. Write the output for the following snippets:

Snippet #4

function bar(n) {
  return n * m;
  var m = 2;
}

console.log(bar(3));

your answer here

Snippet #5

function bar(n) {
  return n * m;
  m = 2;
}

console.log(bar(3));

your answer here

Snippet #6

function bar(n) {
  m = 2;
  return n * m;
}

console.log(bar(3));

your answer here

Snippet #7

'use strict';

function bar(n) {
  m = 2;
  return n * m;
}

console.log(bar(3));

your answer here

Snippet #8

function bar(n) {
  var m = 2;
  return n * m;
}

bar = 5;

console.log(bar(3));

your answer here

Snippet #9

var bar;

function bar(n) {
  var m = 2;
  return n * m;
}

console.log(bar(3));

your answer here

Snippet #10

var bar = 3;

function bar(n) {
  var m = 2;
  return n * m;
}

console.log(bar(3));

your answer here

Snippet #11

function bar(n) {
  var m = 2;
  return n * m;
}

console.log(bar(3));

var bar = 3;

your answer here

Snippet #12

var bar = 2;
var bar = 'a';

console.log(bar);

your answer here