question 1 Assuming that the href attributes of each <a> element contains the UR

Question

question 1

Assuming that the href attributes of each <a> element contains the URL for an image, what does the code that follows do?
var flowers = document.getElementsByTagName("a");
var i, flower, image;
for ( i = 0; i < flowers.length; i++ ) {
     flower = flowers[i];
     image = new Image();
     image.src = flower.href;
}

It puts the contents of all <a> elements into an array named flowers.

It creates a new Image object for each image in the flowers array.

It preloads each Image object.

All of the above.

A and B only.

question 2

What will futureValue contain after the for loop has been executed one time?
var years = 10;
var annualRate = 10;
var futureValue = 1000;
annualRate = annualRate / 100;
for ( i = 1; i <= years; i++ ) {
      futureValue += futureValue * annualRate;
}

(1pts)

1000

1100

11000

1010

question 3

Which method of the Element interface returns true if the element has the specified attribute?

(1pts)

getAttribute()

hasAttribute()

getElementsByName()

setAttribute()

question 4

The childNodes property of the Node interface

(1pts)

returns the text that’s stored in the first child node

returns an array of Node objects that represent the child nodes of a node

returns an array of String objects that contain the text that’s stored in each child node

returns a null value if the node has no child nodes

question 5

Code Example 2-1
1. var myAge, newAge;
2. myAge = prompt("How old are you?");
3. myAge = parseInt(myAge);
4. newAge = 18 - myAge;
5. alert("You will be eligible to vote in " + newAge + " years");

(Refer to Code Example 2-1) What would be returned if the user entered “fifteen” at the prompt?

(1pts)

You will be eligible to vote in undefined years

You will be eligible to vote in NaN years

You will be eligible to vote in years

nothing, the program would not run

Explanation / Answer

Question 1:

Answer - All of the Above

Reason :- Var Flowers stores all the list of url arddress, and in the for loop for each flower creates an image object by calling new Image(), by assigning flower.href to image src it preloads each image object . So the answer is all of the above

Question 2

Answer - 1100

from Question annualRate = 10/100 = 0.1

Since the for loop is for only one time futureValue += futureValue *annualRate becomes

1000 += 1000 * 0.1 => 1000 += 100 => 1100

Question 3

Answer - hasAttribute ()

Because getAttribute returns the value of the specified attribute , hasAttribute returns true or false if the specified element is there or not,getElementsbyName returns elements with the specified name and setAttribute helps to set the attribute

Question 4

Answer :-  returns an array of Node objects that represent the child nodes of a node

Child nodes are returning an array of node objects , not the text file or string , Can acces the property through the object. if the node has no child then it will return false not null value. So the answer is 2 nd one

Question 5

Answer - You will be eligible to vote in NaN years

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