JAVASCRIPT-STRING,ARRAYS,FUNCTIONS

What does the following code snippet do? function add(x, y) { return x + y; }

console.log(add(5, 3));

(a)  

NOT a valid way to pass arguments to a function?

(a)  

What will the following code output? function foo() { var x = 10; if (true) { var x = 20; console.log(x); } console.log(x); } foo();

(a)  

What is the result of the following code? function sayName(name) { console.log("Hello, " + name); } var greeting = sayName("John"); console.log(greeting);

(a)  

What will be the output of the following code? let arr = [1, 2, 3]; console.log(arr[3]);

(a)  

What will be the output of the following code? let arr = [1, 2, 3]; arr.length = 1; console.log(arr[2]);

(a)  

What will be the output of the following code? let arr = [1, 2, 3]; arr[5] = 6; console.log(arr.length);

(a)  

What will be the output of the following code? let arr = [1, 2, 3]; arr.length = 0; console.log(arr[0]);

(a)  

What keyword is used to define a function in JavaScript?

• A) function

• B) define

• C) func

• D) def

What is the scope of variables declared using the var keyword within a function?

• A) Global scope

• B) Local scope

• C) Function scope

• D) Block scope