True/False
Indicate whether the sentence or statement is true
or false.
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| 1. | Including the date that a Web page was last modified gives users confidence that the
data on the page is current.
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| 2. | Scrolling messages often are used on Web sites to highlight breaking news, key
products, or special promotions.
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| 3. | The
display object component of a scrolling message is a text string assigned to a
variable.
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| 4. | Large
text strings used in scrolling messages may cause older Netscape browsers to crash.
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| 5. | The
statement, beginPos = beginPos * 1, increments the beginPos locator by 1.
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| 6. | To
open an HTML file stored on a disk in drive A, click File on the menu bar, click Save, click
31/2 Floppy (A:) in the Look in box, and then double-click the desired document
to open.
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| 7. | One
reason to avoid assigning a scrolling message to the status bar is that the message can hide
information the user needs to see relating to the current or next page being loaded.
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| 8. | In
HTML code, the variables required in the scrollingMsg() function are not assigned initial values
before the function statements are entered.
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| 9. | It is
good programming practice to use statements that only can be understood by programmers familiar with
the language you are using.
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| 10. | The
comparison, a==b, is true if a equals b and the data are of the same type.
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| 11. | After
you have saved an HTML file the first time, subsequent Save commands use a different file name with
each save.
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| 12. | To
avoid errors, it is good development practice to test a Web page several times during its development
and a final time before publishing it to your Web site.
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| 13. | The
anchor tag defines a target link.
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| 14. | It is
not necessary to write JavaScript code to test data for values that are negative or
zero.
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| 15. | If
the value of decipos is negative one (-1), then decipos is set equal to the length of the
string.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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| 16. | Which
of the following is a basic component of a scrolling message? a. | the
message | b. | the position | c. | the
delay | d. | all of the above | | |
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| 17. | Which
of the following statements increments a variable by one? a. | variable =
variable + 1 | b. | variable = variable * 1 | c. | variable+++ | d. | none of the above | | |
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| 18. | Which
of the following conditional operators evaluates as true if a does not equal b?
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| 19. | Which
of the following event handlers triggers JavaScript code when used with buttons and
links? a. | onload | b. | onunload | c. | onclick | d. | onsubmit | | |
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| 20. | Which
of the following event handlers is used to trigger an action when a document is loaded into the
browser window? a. | onclick | b. | onsubmit | c. | onblur | d. | onload | | |
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| 21. | Which
of the following is not a task performed by the scrollingMsg() function? a. | assigning the
next character in the message to the text box | b. | assigning the
message and a space to the display object | c. | assigning the user input to a String
variable | d. | checking for the end of the message | | |
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| 22. | Which
of the following is a variable required by the user-defined scrollingMsg() function? a. | a
spacer | b. | the message | c. | both a. and
b. | d. | neither a. nor
b. | | |
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| 23. | The
first part of the If statement includes ____? a. | JavaScript statements to execute if condition is
True | b. | JavaScript
statements to execute if condition is False | c. | the if
(condition) | d. | none of the above | | |
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| 24. | When
the user performs an action, such as clicking a button, which of the following generally triggers the
JavaScript code associated with the action? a. | an event handler | b. | the <BODY>
tag | c. | a conditional
operand | d. | the setTimeout() method | | |
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| 25. | Which
of the following tags is used with the onload event handler? a. | <IMG> | b. | <FRAMESET> | c. | <BODY> | d. | all of the above | | |
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| 26. | Which
of the following is the general form of the JavaScript statement used to assign a value to a text box
object within a form? a. | document.textboxname.formname.value | b. | textboxname.value = variable_or_literal | c. | document.formname.textboxname.value = variable_or_literal | d. | document.formname.textboxname.value = variable_or_literal =
documentname | | |
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| 27. | Within the HTML code, which of the following starts an anchor tag? a. | <FRAMESET> | b. | <A> | c. | <ANCH> | d. | none of the above | | |
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| 28. | When
you set the focus to a text box, the JavaScript statement automatically positions which of the
following in the text box? a. | the insertion point | b. | the END
statement | c. | both a. and b. | d. | neither a. nor
b. | | |
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| 29. | According to good programming practice, under which of the following should lines of
code be indented? a. | If...Else
statements | b. | Loop statements | c. | functions
| d. | all of the
above | | |
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| 30. | On
which of the following is the JavaScript validation procedure completed? a. | the computer on
which the Web page is stored | b. | the user's computer | c. | both a. and
b. | d. | neither a. nor
b. | | |
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| 31. | Which
of the following is a built-in function of JavaScript? a. | parseInt | b. | parseFloat | c. | eval | d. | all of the above | | |
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| 32. | Which
of the following raises 2 to the power of 3? a. | Math.pow(3, 2) | b. | Math.pow*2 *
3 | c. | Math.pow(2,
3) | d. | Pow.math(2,
3) | | |
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| 33. | Which
of the following should you double-check after entering in the code? a. | symbols | b. | parentheses | c. | quotation
marks | d. | all of the above | | |
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| 34. | Which
of the following is not a step performed by the dollarFormat(function)? a. | separating the
value to the left of the decimal point as the dollar amount | b. | determining the
location of the decimal point | c. | performing a calculation that returns a dollar
amount | d. | inserting a dollar sign immediately to the left of the first
digit without spaces | | |
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| 35. | Which
of the following attributes supplied in the open() method allow you to determine the size at which
the new window initially displays? a. | TOP and BOTTOM | b. | WIDTH and
HEIGHT | c. | NEW and OLD | d. | EXTEND and
CONTRACT | | |
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Completion
Complete each sentence or
statement.
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| | 36. | A
scrolling message displays either in a text box within the Web page or on the
______________________.
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| | 37. | When
naming a text box for use in a scrolling message, the ______________________ attribute indicates the
display width of the text box.
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| | 38. | The
JavaScript statement, ______________________, automatically adds 1 to a variable.
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| | 39. | To
determine if the current value of the beginPos variable is greater than the length of the message,
use the ______________________ statement.
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| | 40. | The
submit button object generally is used with the ______________________ event handler.
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| | 41. | To
complete the scrollingMsg() function, you need to add a(n) ______________________ method that pauses
before calling the scrollingMsg() function again.
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| | 42. | <TAG tag attribute eventhandlername = "JavaScript instruction"> is the
general form of the statement for a(n) ______________________.
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| | 43. | Form
validation in JavaScript uses the ______________________ statement.
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| | 44. | Using
______________________ If...Else statements is one method to test multiple conditions.
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| | 45. | The
______________________ value, returned by the indexOf() method, indicates at what position to
concatenate the decimal values.
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| | 46. | If
the value of decipos is zero, then the input value is a(n) ______________________ .
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| | 47. | The
______________________ loop relies on a conditional statement using numeric values.
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| | 48. | When
the TITLEBAR attribute of the open() method is set to ______________________, the title bar is
removed.
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| | 49. | The
toolbar attribute of the open() method is written as, ______________________.
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| | 50. | The
______________________ attribute of the open(method) includes a status bar when set to the value of
yes.
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