Free Web Programming Question and Answers

Question 1

What is returned by the prompt method if a dialog box is displayed, text is entered, and the OK button is clicked?

Accepted Answer

A string value

Answer

The `prompt()` method in JavaScript displays a dialog box that asks the user for input. If the user enters text and clicks 'OK,' the method returns the entered text as a string value. If the user clicks 'Cancel' or enters nothing, it returns `null` or an empty string, respectively.

Question 2

What occurs when a user chooses a new option from a select list?

Accepted Answer

The change event

Answer

In web programming, specifically with HTML `<select>` elements, the `change` event is fired when the value of the element is committed by the user. This occurs when a user selects a new option from the dropdown list, indicating a change in the selected value.

Question 3

You can obtain a pointer to the Text node by using the firstChild attribute to show data in a span element. What Text node property can you use to set the value shown in the span element, then?

Accepted Answer

The nodeValue property

Answer

In the Document Object Model (DOM), a Text node represents the textual content within an HTML element. To access or modify the actual text content of a Text node, you use its `nodeValue` property. The `value` property is typically used for form elements like input fields.

Question 4

Which of the following commands, given a Date object named due date, sets the month to February?

Accepted Answer

Due_date.setMonth(1);

Answer

In JavaScript, the `setMonth()` method of a Date object sets the month using a zero-based index. Therefore, January is 0, February is 1, March is 2, and so on. To set the month to February, you would pass the index `1` to the `setMonth()` method.

Question 5

What will the test variable be after the following line has been executed if the count variable has a value of 1? Test variable = (count == 1)? "errors": "error";

Accepted Answer

Errors

Answer

This is a ternary operator, which is a shorthand for an if-else statement. The condition `(count == 1)` is evaluated first. Since `count` has a value of `1`, the condition `1 == 1` is true, so the value before the colon, which is "errors", is assigned to the `test` variable.

Web Programming Practice Test

Web Programming Practice Test

Free Web Programming Question and Answers