Session6

What will be the result of the following expression? (Select all that apply)

console.log(2 + "2" - 1 + true);

• "221"

• 22

• 21

• NaN

What is the output of the following code snippet?
var x = 10;

function foo() { var x = 5; console.log(x); }

foo();

console.log(x);

• 10 , 10

• 10 , 5

• 5 , 10

• 5 , 5

var name = "John";

function sayName() { console.log(name); var name = "Jane"; }

sayName();

• John 

• Jane

• JohnJane

• Undefined

How do you convert a string "123" to a number in JavaScript?

• parseInt("123") 

• convertNumber("123") 

• toNumber("123") 

• number("123") 

What will be the output of the following code snippet?

• 1

• 15

• 10

• [1,2,3,4,5]

...(1)...Function-scoped and .

....(2)....Block-scoped

• (1) let , (2) var

• (1) var , (2) let

Which document property will return all the img elements?

• document.links

• document.doctype

• document.images

• document.documentMode

What will be the output of the following JavaScript code?

• Prints the numbers in the array in order

• Prints the numbers in the array in the reverse order

• Prints 0 to the length of the array

• Prints “Empty Array”

What will the following JavaScript code snippet work? If not, what will be the error?

• No, this will throw an exception as only numerics can be used in a for loop

• No, this will not iterate

• Yes, this will work

• No, this will result in a runtime error with the message “Cannot use Linked List”

var string1 = ”123”;

var intvalue = 123;

alert( string1 + intvalue );

• 123246

• 246

• 123123

• Exception