Deck 10: CIW JavaScript Specialist

Question 1

Which script block will display Hello World in the browser when the script is run?

A)
B) document.write(message & message2);
C) var message =  Hello ; var message2 = World ;
D) document.write("message + message2 ");

Answer 1

A

Question 2

Consider the following code: What is the expected result when you run this script in the browser?

A) A window alert box will display Hello.
B) A window alert box will display Goodbye.
C) No window alert box will appear because there is an error in the code.
D) A window alert box will display Hello then a second alert box will display Goodbye.

Answer 2

A

Question 3

Consider the following code: What is the appropriate parameter for the alert() method in line 5 to reference the text in the firstName text box?

A) document.myForm.value(firstName)
B) document.myForm.firstName.value
C) window.myForm.firstName.value
D) window.myForm.text(firstName)

Answer 3

B

Question 4

Which statement is true about the getElementByID() method?

A) It returns only the first element with the specified ID.
B) It returns an array containing all elements with the specified ID.
C) If a match is not found for the specified ID, it will attempt searching by name.
D) If a match is not found for the specified ID, it will attempt searching by tag name.

Question 5

Which choice best defines events and event handlers?

A) An event can be an action initiated by the user, and an event handler specifies how JavaScript will react to the action.
B) An event is an action initiated by the operating system, and an event handler is a function defined by the user.
C) An event handler can be an action initiated by the user, and an event specifies how JavaScript will react to the action.
D) An event is initiated by an error in JavaScript, and an event handler will attempt to bypass the error and continue.

Question 6

Suppose you define two variables as follows: var x = 5; var y = "5"; Which statement will return the mathematical sum of these variables?

A) alert(x + int(y));
B) alert(x + parseInt(y));
C) alert(x + y);
D) alert((int)x + (int)y);

Question 7

Consider the following code: What is the expected result of this script?

A) When you leave the page, the alert box will display.
B) The page will ignore the function, so a blank page will display on entry and exit.
C) When you enter the page, you will be warned that there is unfinished JavaScript to run.
D) When you leave the page, there will be a JavaScript error because you cannot unload an alert box.

Question 8

Which statement about the JavaScript form object is true?

A) The JavaScript form object has no relationship to the X/HTML

element.
B) You can use a single instance of the form object to represent multiple forms on a Web page.
C) The form object cannot be used to access the individual field elements that compose the form.
D) The JavaScript form object is available when the X/HTML

tags are present in the X/HTML document.

Question 9

Consider the following code: Will this function generate an error?

A) No, because the code is well-formed
B) Yes, because the alert syntax is incorrect
C) Yes, because there are no valid variables returned
D) Yes, because the passed arguments have not been defined before the function call

Question 10

Consider the following message displayed in a pop-up window: Welcome to the CIW Web site! Which line of code will deliver the pop-up window that displays this message?

A) CIW Web site
B) CIW Web site
C)
D)

Question 11

What is the purpose of the prototype property in JavaScript?

A) It is used to add properties or methods to a JavaScript object.
B) It returns a list of properties and methods of a JavaScript object.
C) It enables developers to create JavaScript code from a specially formatted prototype flowchart document.
D) It is used to create usage examples of custom objects because its output is not evaluated by the JavaScript interpreter.

Question 12

Which of the following comparison statements will return true?

A) x = 10; y = 5; x <= y;
B) x !== "X"
C) x === y;
D) x == y;

Question 13

Consider the following code: Which statement could be used to determine the value of the first radio button?

A) document.rdoGroup1.value
B) document.myForm.rdoGroup1[0].value
C) document.getElementById(rdoGroup1).value
D) document.getElementById("rdoGroup1").value

Question 14

Consider the following code: When an invalid e-mail address is entered, an alert is displayed to the user, but the form submission is not interrupted. What changes need to be made to the script in order to abort the submission if an invalid e-mail address is entered?

A) Add return false after the alert() statement.
B) Change return to validate in the function call.
C) Add validate false after the alert() statement.
D) Remove the return keyword from the function call and put it in front of the alert() statement.

Question 15

Which of the following is a browser security issue that JavaScript developers should remember when developing a script?

A) JavaScript cannot be disabled in the client and will always run.
B) JavaScript functionality is immune to viruses, trojans and malware.
C) JavaScript is a cross-platform scripting language and will generate consistent results regardless of the client or server being used.
D) Certain JavaScript functionality may be blocked by some browsers, which prevents the script from running as expected for all users.

Question 16

Which statement will open this Web document in a new browser window?

A) document.open(http://www.CIWcertified.com);
B) window.open(http://www.CIWcertified.com);
C) window.open("http://www.CIWcertified.com");
D) document.open("http://www.CIWcertified.com");

Question 17

Which of the following is a practice associated with the security risk known as cross-site scripting (XSS)?

A) Inserting JavaScript code in a URL query string to perform an unintended or malicious action
B) Using a look-alike site to impersonate a trusted site so the user will enter sensitive information
C) Using a certificate authority validation to persuade users to accept a specialized script that can override certain security restrictions in the browser
D) Launching a JavaScript statement that has no conditions for ending, thus requiring the user to close the browser in order to end the script

Question 18

Consider the following statement: for (X; Y; Z) What does Z represent in this code?

A) The counter variable
B) The loop counter update expression
C) The condition under which the loop will execute
D) The highest value that the counter variable may reach

Question 19

Consider the following code:   What output will appear in the browser when you run this script?

A) "1, 2, 3, 4, 5, 6, 7, 8, 9"
B) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
C) 1, 2, 3, 4, 5, 6, 7, 8, 9,
D) "1, 2, 3, 4, 5, 6, 7, 8, 9, 10"

Question 20

Consider the following code: What is the output when you run this script in the browser?

A) An alert box displaying the following: John, Paul, George, Ringo
B) An alert box displaying the following: Ringo, John, Paul, George
C) An alert box displaying the following: Ringo, Paul, George
D) An alert box displaying the following: John, Ringo, George

Question 21

Which of the following will correctly declare the EmployeeID variable as a string data type?

A) string EmployeeID = 123;
B) string EmployeeID = "123";
C) var EmployeeID = 123;
D) var EmployeeID = "123";

Question 22

Consider the following code: What needs to be changed to allow this script to run without error?

A) Change the substring method call to substr
B) Change the substring method call to substr()
C) Change the characterAt method call to charAt
D) Change the characterAt method call to characterat

Question 23

Consider the following code: var myString= "Hello World"; alert(myString.length); What is the output when you run this script in the browser?

A) An alert box displaying the following: "Hello World", 11
B) An alert box displaying the following:  myString, 11
C) An alert box displaying the following:  Hello World
D) An alert box displaying the following: 11

Question 24

Which of the following will correctly modify the value of an X/HTML element's attribute within the DOM?

A) getAttribute(NewValue, AttributeName)
B) getAttribute(AttributeName, NewValue)
C) setAttribute(NewValue, AttributeName)
D) setAttribute(AttributeName, NewValue)

Question 25

Which of the following is a reason why a developer would use a JavaScript library?

A) JavaScript libraries ensure quality code that does not harbor security risks.
B) JavaScript libraries require a shorter learning curve than JavaScript.
C) JavaScript libraries are subsets of Java and thus provide more powerful code.
D) JavaScript libraries provide platform-independent code that will behave identically in any browser.

Question 26

Maria, a 22-year old student, is testing her JavaScript application, which includes the following code: Assuming Maria enters truthful information, what is the value of z after executing this code?

A) No value ?error in line 1 due to missing var keyword for userAge.
B) No value ?error in line 1 due to multiple declarations in one line.
C) Maria "is" 22 "years old"
D) Maria is 22 years old

Question 27

How is the alert() method different from prompt() and confirm()?

A) The alert() method generates a modal dialog box, which requires user action before the next JavaScript instruction can be executed, whereas prompt() and confirm() do not.
B) The alert() method requires only one parameter, whereas prompt() and confirm() require two parameters.
C) The alert() method requires two parameters, whereas prompt() and confirm() require only one parameter.
D) The prompt() and confirm() methods return a value, whereas alert() does not.

Question 28

Consider the following select list: Which of the following will select the third option in the list?

A) var list = document.getElementById("numlist"); list.selected = 3;
B) list.options[2].selectedIndex();
C) list.options.selectedIndex = 2;
D) list[3].selected(true);

Question 29

Consider the following code: When a user clicks on the displayed link, which site will he navigate to?

A) www.msn.com
B) www.yahoo.com
C) www.google.com
D) No other site, because there is a runtime error

Question 30

Which example correctly implements inline scripting with JavaScript?

A)
B)
C)
D)