Server-Side And Client-Side Scripting MCQ question and answer in javascript with solution

61

What is the property to access the first child of a node?

A) timestamp.Child1 B) timestamp.Child(1) C) timestamp.Child(0) D) timestamp.firstChild

Discuss

Answer & Solution

Answer: Option D

Solution:

The first child of a node can be accessed using the firstChild property.

62

What are the properties supporting CSS styles for a document element?

A) style and font B) style and className C) size and style D) className and font

Discuss

Answer & Solution

Answer: Option B

Solution:

Each Element object has style and className properties that allow scripts to specify CSS styles for a document element or to alter the CSS class names that apply to the element.

63

The style property belongs to while of the following object?

A) Element B) Window C) Location D) None of the mentioned

Discuss

Answer & Solution

Answer: Option A

Solution:

Each Element object has style and className properties that allow scripts to specify CSS styles for a document element or to alter the CSS class names that apply to the element.

64

What is the purpose of the event handlers in the JavaScript?

A) Adds innerHTML page to the code B) Performs handling of exceptions and occurences C) Allows JavaScript code to alter the behaviour of windows D) None of the mentioned

Discuss

Answer & Solution

Answer: Option C

Solution:

Event handlers allow JavaScript code to alter the behavior of windows, of documents, and of the elements that make up those documents.

65

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

A) onload B) manipulate C) create D) none of the mentioned

Discuss

Answer & Solution

Answer: Option A

Solution:

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.

66

When a program contains extensive use of event handlers, which of the following is necessary?

A) Modular functions B) Nested functions C) Split up programs D) All of the mentioned

Discuss

Answer & Solution

Answer: Option B

Solution:

Nested functions are common in client-side JavaScript, because of its extensive use of event handlers.

67

What is the code snippet to find all container elements with class “reveal”?

A) var elements = document.getElementsByClassName("reveal"); B) var elements = document.getElementByClassName("reveal"); C) var elements = document.getElementByName("reveal"); D) var elements = document.getElementsClassName("reveal");

Discuss

Answer & Solution

Answer: Option A

Solution:

The above code snippet finds all container elements with class “reveal”.

68

What is the code snippet to update the content of the timestamp element when the user clicks on it?

A) timestamp.onLoad = function() { this.innerHTML = new Date().toString(); } B) timestamp.onclick = function() { this.innerHTML = new Date().toString(); } C) timestamp.onclick = function() { innerHTML = new Date().toString(); } D) None of the above

Discuss

Answer & Solution

Answer: Option B

Solution:

The above code snippet updates the content of the timestamp element when the user clicks on it.

69

Which of the following is not an object?

A) Element B) Location C) Position D) Window

Discuss

Answer & Solution

Answer: Option C

Solution:

There is no object called Position.

70

What is the code snippet to change the class and let the stylesheet specify the details?

A) timestamp.className = "highlight"; B) timestamp.className = "change"; C) timestamp.className = "specify"; D) timestamp.className = "move";

Discuss

Answer & Solution

Answer: Option A

Solution:

The above code snippet changes the class and lets the stylesheet specify the details.