Question 1

When should you use dialog boxes (alert, confirm, and prompt) for input and output?

Accepted Answer

Dialog boxes should be used sparingly and only when you need to capture the user's immediate attention and require them to take action before proceeding. They interrupt the user's workflow, so they should be reserved for critical interactions.

Question 2

Consider the following three strings:
"to be or not to be", "to", "tooth"
Which of the following shows the strings sorted into ascending lexicographical order (words that are considered less than other words should be at the left).

Accepted Answer

In lexicographical order, strings are compared character by character based on their ASCII values. "to" comes before "to be or not to be" because it is shorter and matches the beginning. "to be or not to be" comes before "tooth" because the space character has a lower ASCII value than 'o'.

Question 3

To embed a backslash character (\) within a JavaScript string, you need to use the ______ escape sequence.

Accepted Answer

\

Question 4

Provide a functionally equivalent, shorter version of the following code:
window.document.getElementById["name"]

Accepted Answer

The answer of Provide a functionally equivalent, shorter version of...

Question 5

The following code generates a dialog box that contains a question and an input box:
prompt("What's your favorite color?", "");
Initially, what displays inside the input box?

Accepted Answer

The answer of The following code generates a dialog box...

Question 6

Suppose a variable x holds "dog". After the following code gets executed, what does x hold?
x += "fish";

Accepted Answer

The answer of Suppose a variable x holds "dog". After...

Question 7

When the following code executes, what message does the dialog box display?
var month = "January";
if (month.toLowerCase() == "january") {
alert("It is " + month + "!");
}

Accepted Answer

The answer of When the following code executes, what message...

Question 8

After the following code executes, what does x hold?
var location = "Taos, NM";
var x = location.charAt(location.length - 1);

Accepted Answer

The answer of After the following code executes, what does...

Question 9

After the following code executes, what does x hold?
var animal = "porcupine";
var x = animal.lastIndexOf("p", 3);

Accepted Answer

The answer of After the following code executes, what does...

Question 10

What does the following expression evaluate to?
39 % 10 / 4

Accepted Answer

The answer of What does the following expression evaluate to?
39...

Question 11

Which of the following is a function of the window object's location property?

Accepted Answer

The `window.location` property holds the URL of the current web page, allowing scripts to access or modify the URL.

Question 12

What is the syntax for generating a dialog that displays a message and does not receive input?

Accepted Answer

The `alert(message);` syntax is used in JavaScript to display a dialog box with a specified message and an OK button, without requiring any input from the user.

Question 13

What is the syntax for generating a dialog that prompts the user to answer yes or no to a question?

Accepted Answer

The `confirm(message);` function in JavaScript displays a dialog box with a specified message, along with OK and Cancel buttons, allowing the user to answer yes or no.

Question 14

What is an if statement's condition?

Accepted Answer

A condition in an if statement is an expression that evaluates to true or false, determining whether the code block inside the if statement should be executed.

Question 15

An if statement is an example of a:

Accepted Answer

An if statement is a branching statement because it allows the program to execute different code depending on whether a condition is true or false.

Question 16

Which of the following statements is correct regarding an initialization statement?

Accepted Answer

An initialization statement in programming typically involves declaring a variable and assigning it an initial value.

Question 17

The window object's screen property holds information about the monitor that is being used.

Accepted Answer

The `window.screen` property provides information about the user's screen, such as its width, height, and color depth.

Question 18

A named constant is a special variable whose value is fixed.

Accepted Answer

A named constant is a variable that is assigned a value once and cannot be changed during the program execution, effectively making its value fixed.

Question 19

To break/split a string in JavaScript, you should terminate the first part of the string with a closing quote, insert a(n) ______, and start the next line's continuation string with an opening quote.

Accepted Answer

The answer of To break/split a string in JavaScript, you...

Question 20

A(n) __________ is a pictorial representation of the logic flow of a computer program.

Accepted Answer

The answer of A(n) __________ is a pictorial representation of...

Quiz 9: Additional Javascript Basics: Window Object, If Statement, Strings, Numbers, and Input Validation

When should you use dialog boxes (alert, confirm, and prompt) for input and output?

Consider the following three strings: "to be or not to be", "to", "tooth" Which of the following shows the strings sorted into ascending lexicographical order (words that are considered less than other words should be at the left) .

To embed a backslash character (\) within a JavaScript string, you need to use the ______ escape sequence.

Provide a functionally equivalent, shorter version of the following code: window.document.getElementById["name"]

The following code generates a dialog box that contains a question and an input box: prompt("What's your favorite color?", ""); Initially, what displays inside the input box?

Suppose a variable x holds "dog". After the following code gets executed, what does x hold? x += "fish";

When the following code executes, what message does the dialog box display? var month = "January"; if (month.toLowerCase() == "january") { alert("It is " + month + "!"); }

After the following code executes, what does x hold? var location = "Taos, NM"; var x = location.charAt(location.length - 1);

After the following code executes, what does x hold? var animal = "porcupine"; var x = animal.lastIndexOf("p", 3);

What does the following expression evaluate to? 39 % 10 / 4

Which of the following is a function of the <code>window</code> object's <code>location</code> property?

What is the syntax for generating a dialog that displays a message and does not receive input?

What is the syntax for generating a dialog that prompts the user to answer yes or no to a question?

What is an <code>if</code> statement's condition?

An <code>if</code> statement is an example of a:

Which of the following statements is correct regarding an initialization statement?

The <code>window</code> object's <code>screen</code> property holds information about the monitor that is being used.

A named constant is a special variable whose value is fixed.

To break/split a string in JavaScript, you should terminate the first part of the string with a closing quote, insert a(n) ______, and start the next line's continuation string with an opening quote.

A(n) __________ is a pictorial representation of the logic flow of a computer program.