JavaScript Quiz -7

JavaScript QUIZ -7

The quiz consists of 20 CSS questions. Let's check your CSS with this simple quiz.

Total Questions : 20
Question Type : MCQ
Time Limit : 5 Minutes
Maximum Points : 20

1 / 20

What would be the result of the following statement in JavaScript using regular expression methods?

Returns [“123″”456″”789”]

Returns [“123″,”456″,”789”]

Returns [1,2,3,4,5,6,7,8,9]

Throws an exception

2 / 20

Which are the two functions that are not allowed in any secure subset?

evaluate() and restrict()

eval() and the Function() constructor

debugger() and test()

eval() and debugger()

3 / 20

Which looping statement allows XML tags to appear in JavaScript programs and adds API for operating on XML data?

for loop

while loop

for/each loop

do while loop

4 / 20

Which is the subset that transforms web content into secure modules that can be safely hosted on a web page?

Microsoft Web Sandbox

ADsafe

Caja

dojox.secure

5 / 20

What is being imposed on each subset to ensure that it conforms to the subset?

A parser to parse the code

A parser that parses and adds to the subset

A static verifier that parses code

A predefined function to parse the code

6 / 20

Which is the object that defines methods that allow complete control over page content?

The client-side document object

The server-side document object

Web document object

7 / 20

What will be the reaction when a catch clause has no conditionals?

Takes it to be 0

Takes it to be 1

Takes it to be true

Takes it to be false

8 / 20

Why is this keyword not preferred in JavaScript?

) Highly memory consuming

Functions should access the global objects

Functions should not access the global objects

Very inefficient to use

9 / 20

Which is the subset that is a secure container designed for the purpose of safely running untrusted JavaScript?

Sandbox

The Good Parts

Both Sandbox and Good Parts

Web browser

10 / 20

Which was one of the first security subsets proposed?

FBJS

Caja

dojox.secure

ADSafe

11 / 20

The main difference between the variables declared with var and with let is _________

var is confined to a particular function but let is not

let is confined to a particular function but var is not

var defines values based on conditions but let does not

let doesn’t let you change the value of the variable

12 / 20

The let keyword cannot be used ___________

as a substitute of var

as a block statement to define new variables

to define variables that are scoped to a single expression

in a else if loop, as a substitute for var

13 / 20

Which exception does the Iterators throw from their next() method when there are no more values to iterate, that work on finite collections?

Exit Iteration

Abort Iteration

Abort

Stop Iteration

14 / 20

What is the return type of typeof for standard JavaScript objects?

xml

object

dom

html

15 / 20

Which method to use while working with XML fragments, instead of XML()?

XMLInterface()

XMLClass()

XMLList()

XMLArray()

16 / 20

Why was “The Good Parts” designed as a language subset in JavaScript?

To improve programmer flexibility

To balance the workload of the programmer

To create an in-built compiler and interpreter

To improve programmer productivity

17 / 20

What does javascript use instead of == and !=?

It uses bitwise checking

It uses === and !== instead

It uses equals() and notequals() instead

It uses equalto()

18 / 20

When will the finally block be called?

When there is no exception

When the catch does not match

When there is exception

After try-catch execution

19 / 20

The Crockford’s subset does not include which function in JavaScript?

eval()

coeval()

equal()

equivalent()

20 / 20

What is the code to be used to trim whitespaces?

let trimmed = (l.trim() for (l in lines));

let trimmed = (trim(l));

let trimmed = l.trim();

let trimmed = for(l in lines));

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