Video 37-1 Module Overview, Primitive and non-primitive data type
Video 37-2 Null Vs Undefined, different ways you will get undefined
Video 37-3 Different Truthy and Falsy values in JavaScript
Video 37-4 double equal (==) vs triple equal (===), implicit conversion
Video 37-5 Block scope global scope simple understanding of Hoisting
Video 37-6 (advanced) Closure, encapsulation, private variable
Video 37-7 (optional) Callback function and pass different functions
Video 37-8 (advanced) function arguments pass by reference pass by value
Video 37-9 Module summary and Practice Problems
QUIZ
Q1: Which value is Falsy?
Ans: undefined
Q2: What is "closure"? (google: what is closure in javascript)
Ans: Access to an outer function's scope from an inner function AND function bundled together(enclosed) with references to its surrounding state
Q3: what would be the output?
let p='Javascript';
let q=p;
p='React';
console.log(q);
Ans: JavaScript
Q4: What will be the output (be careful. And think about it)?
const isTrue='false';
if(!isTrue){
console.log('hello');
} else {
console.log('world');
}
Ans: world
Q5: Which one will check whether the value and the type are the same for strict equality comparison?
Ans: ===
Q6: What will be the value of the result?
function sum(p, q) {
p + q;
}
const result = sum(2, 3);
console.log(result);
Ans: undefined
Q7: When will you get undefined?
Ans: All of the above
Q8: What would be the output from the code below?
if ("2" === 2) {
console.log("Inside if");
} else {
console.log("Inside else");
}
Ans: Inside else
Q9: What would be the output from the function below?
function work(x, y = 4) {
return x + y;
}
console.log(work(32);
Ans: Syntax error:
Q10: Can you access the let variable outside of the block scope?
Ans: No
