Questions and answers for exam Preparation

MCQs

Total Questions : 10

Question 1. What is the alternative command used in Node for load()?

store()
module()
log()
require()

Discuss Question

Answer: Option D. -> require()

Use require() instead of load(). It loads and executes (only once) the named module, returning an object that contains its exported symbols.

Question 2. Which of the following are not advanced services?

Data storage
Networking
XMLHttpRequest object
None of the mentioned

Discuss Question

Answer: Option D. -> None of the mentioned

All the above mentioned are advanced services.

Question 3. Which is the in-house library of Yahoo!?

Dojo
YUI
Prototype
Closure

Discuss Question

Answer: Option B. -> YUI

YUI is the in-house library of Yahoo!, and it is used on their home page.

Question 4. What does Dojo and YUI have in common?

Facilitates DOM utilities and UI Widgets
Doesnot facilitates DOM utilities and UI Widgets
Client-side library
None of the mentioned

Discuss Question

Answer: Option A. -> Facilitates DOM utilities and UI Widgets

Like Dojo, it is a large, all-encompassing library with language utilities, DOM utilities, UI widgets, and so on. There are actually two incompatible versions of YUI, known as YUI 2 and YUI 3.

Question 5. Among the below given functions, Node supports which of the following client-side timer functions?

getInterval()
Interval()
clearTime()
clearTimeout()

Discuss Question

Answer: Option D. -> clearTimeout()

Node supports the client-side timer functions set setTimeout(), setInterval(), clearTimeout(), and clearInterval().

Question 6. One of the main advantage of using src attribute is

It becomes self-cached
It makes the HTML file modular
It restricts manipulation in the HTML file
It simplifies the HTML files

Discuss Question

Answer: Option D. -> It simplifies the HTML files

The main advantage of using the src attribute is that it simplifies your HTML files by allowing you to remove large blocks of JavaScript code from them”that is, it helps keep content and behavior separate.

Question 7. Which identifier is used to represent a web browser window or frame?

frames
window
location
frame

Discuss Question

Answer: Option B. -> window

The Window object is the main entry point to all client-side JavaScript features and APIs. It represents a web browser window or frame, and you can refer to it with the identifier window.

Question 8. Which handler is triggered when the content of the document in the window is stable and ready for manipulation?

onload
manipulate
create
None of the mentioned

Discuss Question

Answer: Option A. -> onload

One of the most important event handlers is the onload handler of the Window object. It is triggered when the content of the document displayed in the window is stable and ready to be manipulated. JavaScript code is commonly wrapped within an onload event handler.

Question 9. When the "end event fires on EOF when no more data will arrive, which function is called?

s.on("data",f);
s.on("end",f);
s.on("error",f);
s.on("default",f);

Discuss Question

Answer: Option B. -> s.on("end",f);

The above code snippet gets "end event fired on EOF when no more data will arrive.

Question 10. What does Rhino do when the getter and setter methods exist?

It becomes JavaScript properties
Java classes are used to avoid them
Both a and b
None of the mentioned

Discuss Question

Answer: Option A. -> It becomes JavaScript properties

Rhino allows JavaScript code to query and set the static fields of Java classes and the instance fields of Java objects. Java classes often avoid defining public fields in favor of getter and setter methods. When getter and setter methods exist, Rhino exposes them as JavaScript
properties.