CIS 110 Final Questions – Flashcards

165 test answers

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question
what is the best reason to include height and width attributes on an tag.
answer
to help the browser render the page faster because it reserves the appropriate space for the image
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What is the browser's action when you configure BOTH a background color and background image for the body selector?
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display the background color while the background image loads and before the background image is displayed
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When a web page uses graphics for the main navigation links, provide accessibility by:
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providing text links on the bottom of the page
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A(n) ________ is an image that is configured so that parts of the image can be used as one or more hyperlinks.
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image map
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What is the code below that will configure a background image called parchment.gif for a web page using CSS?
answer
body {background-image:url(parchment.gif); }
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what is the code below that uses CSS to eliminate the default border on an image configured as an image?
answer
img {border: 0; }
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The theorem that states that any program logic can be written using only three constructs is called the ________________theorem
answer
Structure
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Counted repetition refers to the idea that an index is _________ and then tested each time the loop iterates.
answer
incremented
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What controls a for loop?
answer
iteration variable
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How many iterations will occur in this loop? for (again = 1; again ;=5; again = again + 1) {...}
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5
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what code iterates 10 times?
answer
) for (i = 1; i ;=10; i = i + 1)
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What is an example of an infinite loop?
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for (i = 1; i ;= 4; i = i - 1)
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What does + mean in javascript?
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addition or concentration
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in the line: var rows = new Array(5); what will result?
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the first item in the array will be rows[0]
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what is clearTimeout used for?
answer
Cancelling a timer
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For the elements of the array to store an image, they must be initialized to a(n):
answer
image object
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In a for loop, the operation that sets the variable's value for the first iteration of the loop is the:
answer
initialization
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What is an indexed base name?
answer
array
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What is the standard form of the World-Famous Iteration? (WFI)
answer
) for ( j=0; j<n; j++) { . . . }
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Which is the first step in the program development cycle?
answer
Analyze the problem
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What is not a control structure?
answer
syntax
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What is not one of the primary Javascript data types?
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float
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What data type can only have one of two possible values?
answer
Boolean
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What is not an acceptable variable name?
answer
1_Name
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What is not an acceptable variable name for a friend?
answer
my friend
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If the variable hours = 10, what is the value of the variable salary after the following instruction has been executed: salary = hours * 8
answer
80
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which method allows you to display text on an html page?
answer
write()
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Which method will retrieve the contents of an html element?
answer
getElementByld()
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question
Evaluate 8 % 7
answer
1
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Given: a = 4 and b = 3, evaluate: (14 % a ) * a * b / 6 + (b * b)
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13
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If car = "Honda", how does the following expression evaluate: (car < "Toyota");
answer
true value
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If beverage = "tea", which of the following is true?
answer
!(beverage != "tea");
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Which is equivalent to (X > 5) given that X is a numeric variable.
answer
!(X <= 5)
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question
Which of the following will assign the variable named timCall to the sentence: Tim called, "Lassie, come home!"
answer
var timCall = 'Tim called, "Lassie, come home!"';
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question
Which of the following is NOT a valid variable name for a dog?
answer
dogs-rule
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question
Given the following code snippet, what will be displayed on the web page if the user enters 4 at the prompt? var myNum = prompt("Enter a number:"); var result = myNum + myNum; document.write(result);
answer
44
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question
Given the following code snippet, what will be displayed on the web page if the user enters 4 at the prompt? var myNum = prompt("Enter a number:"); var result = myNum * myNum; document.write(result);
answer
16
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Given the following code snippet, what will be displayed on the web page? var X = 23; var Y = 3; var Z = X + Y; document.write(Z);
answer
26
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Given the following code snippet, what will be displayed on the web page if the user enters 6.35 at the prompt? var A = prompt("Enter a number:"); document.write(parseFloat(A) + ", "); document.write(parseInt(A)); a. 6.35NaN b. 6.35 c. 6.35, 6 d. 6.35, 6.35
answer
6.35, 6
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Given the following code snippet, what will be displayed on the web page if the user enters 55 at the prompt? var result = "Yes!"; var multiply = prompt("What is 5 * 11?"); result = (parseInt(multiply) == 55)?"Correct":"Incorrect"; document.write(result);
answer
correct
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What type of loop executes at least once?
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post-test
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what is the value of x after the following statement executes, given that initially x = 8: x*=3;
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24
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How many times will "bye bye" display after the following code is executed? var b = 3; var g = 1; do { document.write("bye bye"); g++; } while (g > b)
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1
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What is the result of the following code snippet? var car = 4; var result = isNaN(car); document.write(result);
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True
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What is the value of the variable myLetter after the following statements are executed? var name = "Santa Claus"; var myLetter = name.charAt(3);
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"t"
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What function will generate a random number between 1 and 100, inclusive
answer
. num = (Math.floor(Math.random() * 100) + 1;
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question
Which of the following will display "cost is $23.95", assuming cost = 23.9487 ?
answer
document.write("cost is " + cost.toFixed(2);
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question
In the following statement, what is the initial condition, given that y = 600? for(x = 500; x > y; x++)
answer
x = 500
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What is the value of count when the following loop is exited? var count = 20; while( count < 200) count*=3;
answer
540
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What will be displayed after the following loop is exited? var name = "Liam"; for(var x = 3; x < 0; x--) document.write(name.charAt(x) + ", ");
answer
m a I L
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What is the value of address, given: myAddress = "123 Duck Street, NW"; address = myAddress.length;
answer
19
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What is the value of street given: var street = " "; myAddress = "123 Duck Street, NW"; for( var x = 4; x <= 7; x++) street = street + myAddress.charAt(x);
answer
Duck
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question
From language to language, generally an identifier:
answer
starts with a letter and is followed by letters, numerals, or the underscore
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Which of the following is a valid JavaScript variable name?
answer
BR549
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In JavaScript, the escape symbol is the:
answer
backslash ()
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Which of the following is not a suitable assignment statement?
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length * width = area
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The value used for a variable on the right side of an assignment statement is:
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the value before the statement is executed
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The first step in solving a programming expression is to process:
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the part of the expression inside the parentheses
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In JavaScript, 17%5 is:
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2
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An if statement must have:
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a semicolon at the end of it
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question
How is an empty string written?
answer
""
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string constants/literals are:
answer
surrounded by quotes in Javascript code
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Javascript is:
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an interpreted language, meaning that the program code is executed directly without compiling
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what side programs do not require users to wait for data to be sent over the Internet to a Web server?
answer
client
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What code can be inserted directly into an HTML file or placed in a separate text file that is linked to a Web page?
answer
Javascript
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Placing JavaScript code in a Web page file means that users need to retrieve only ____ file from the server.
answer
1
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What is the type of attribute value for Javascript?
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text/javascript
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there is no limit to the number what elements used within a web page?
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script
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what section of a web page can scripts be placed?
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head and body
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JavaScript supports comment tags, using a set of double ____ at the beginning of a line that instructs the browser to ignore the line and not interpret it as a JavaScript command.
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slashes
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One way to handle the way that XML parsers treat the content of a JavaScript program is to place the JavaScript code within a(n) ____ section.
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CDATA
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The text string specified by the document.write() method can be enclosed within what?
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double quotation marks or single quotation marks
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Each JavaScript command line ends with a(n) ____ to separate it from the next command line in the program.
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semicolon
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An action for the browser to take in a script is called what?
answer
a command and a statement
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You can display single quotation marks with the document.write() method by enclosing your text string within what?
answer
double quotation marks
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Another method to write text to the Web page is the what method?
answer
document.writeIn()
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Why must you pay attention to whether or not letters are capitalized in javascript?
answer
javascript is case sensitive
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what does javascript do with most occurrences of white space?
answer
ignores it
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you can indicate that a statement continues on the next line using what?
answer
backslash
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what are useful because they can store information created in one part of your program and use that information in another?
answer
variables
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naming a variable, the first character must be either a letter or what?
answer
underscore
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variable names cannot contain what?
answer
spaces
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variable declarations should be placed at what part of a program to make interpretation easier?
answer
beginning
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what is any group of characters such as "hello" or "happy holidays!"?
answer
text string
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Variable names declared in a function can be used when? 19
answer
only inside that function
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what is not a part of a function?
answer
global variables
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output directly onto a web page from javascript is done using what?
answer
document.write()
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a variable declared in a function is what?
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local variable
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in javascript the result of a function call can be printed on the monitor how?
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with the alert( ) call interactively after the page is displayed while building the page on the fly
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a function that cannot be reused:
answer
cannot be used as a building block
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javascript function that retrieves the current date and time in numeric form is what?
answer
date()
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the function toString():
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converts a numeric form to a printable form
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what is another word for function?
answer
procedure, subroutine, method
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how would you find the time between two dates?
answer
divide the difference by 1000 to find the seconds
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which function loads the page that is specified as its first arguement?
answer
window.open()
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what are inputs also called?
answer
parameters
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the random numbers generated by math.random():
answer
are really pseudo-random
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the values returned by the Math.random() function are between
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0 (inclusive) and 1 (exclusive)
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before you use a variable in javascript you should what?
answer
declare it
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what is an exemple of a non numeric value data type?
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"12"
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how many data types does javascript support?
answer
4
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you can cause a variable to have no value by assigning it what value?
answer
Null
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what symbol can be used to combine text strings?
answer
+
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what language forces programming to explicitly identify a variable's data type?
answer
strongly typed
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when used with both numbers and text, what symbol treats the numbers as text?
answer
c. +
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when variables are not strictly tied to specific data types, programmers refer to the language as_____ typed language
answer
loosely
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if you follow z+1 with the statement z="3", then z has what data type?
answer
text string
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If x has the value 5 and the variable y has the value "combo", then y + " no " + x results in what value?
answer
combo no 5
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a function includes what function which identifies it?
answer
name
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a function may require what values used by the function?
answer
parameters
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what commands can be used in a function?
answer
return 3; z=1+2; document.write("Hello World");
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What does the JavaScript command document.println("Hello" + "World"); print? 19
answer
HelloWorld
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what is X in xml?
answer
extensible
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what are the similarities between xml and html
answer
are markup languages derive from sgml use tags
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what is mandatory in xml?
answer
document root element
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where is other optional info placed?
answer
in the prolog
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if you use and xml declaration at the top of an xml doc then
answer
it must be the 1st thing
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the doc type definition is a statement of what?
answer
the permitted structure of the xml
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what can you do if you know the structure and properties of data?
answer
retrieve it organize it manage it
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in database terminology, a set of entity instances refers to what?
answer
table
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the kind of info stored in a field in a database is what?
answer
data type
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a project operation does what?
answer
a)return a table with as many rows as the original tables b)return only unique rows and merge duplicate rows c)automatically sort the list in alphabetical order by the first field
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databases store data just once why?
answer
to avoid redundancy
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how do you identify the type of data in xml?
answer
by its tag
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what tag encloses everything in an xml?
answer
the root element
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when is indenting required in xml?
answer
never
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a database row is what?
answer
tuple or record
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database rows are what?
answer
unordered
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what is the main use of a database?
answer
find info
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when using a select operation the test is applied to what?
answer
each row
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the tag is what?
answer
a collection tag
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the tag is what?
answer
an identification tag
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what is the root tag?
answer
collection tag
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what styles xml files for a browser?
answer
xsl
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an incremental approach to development has the advantage of what?
answer
shortening development time making the final product smaller limiting errors to recently developed materials
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when you open an xml file without a stylesheet what happens?
answer
it displays a tree showing the structure of your file
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what are xsl tag rules called?
answer
templates
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the second line of an xml file that uses an xsl template begins with what?
answer
;?xsl-stylesheet
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iDiary is ordered by what?
answer
date
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each attribute in an xsl file requires what?
answer
tag
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to add entries to idiary you would do what?
answer
modify the xml file
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xml and xsl files are combined in what to convert them to html?
answer
transformer
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Virus protection software:
answer
should be installed on your computer immediately must be updated to keep it current must be operating at all times to protect against worms and viruses
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European privacy standards are closest to the policy called what?
answer
no uses
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American privacy standards are closest to what?
answer
no limits
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The accuracy of personal info is who's responsibility?
answer
individual
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Who is in charge of privacy policies and communication with individuals regarding their privacy?
answer
data controller
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personal info can be tracked by what?
answer
cell phone use, cookies, ip address
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if you disable cookies on your computer what happens?
answer
all cookies, including third-party cookies, will be blocked normal Web interaction will be more difficult you won't be able to do online transactions
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Spyware is what?
answer
software that snoops private info
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The RSA public key cryptosystem relies on what?
answer
prime numbers
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where are cookies stored?
answer
on a client and retrieved by a server
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question
Backups on you personal computer:
answer
are just as essential to a personal system as a business system
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personal backups are not critical for what?
answer
information that has been backed up but not changed software programs unimportant files
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The most important consideration in a disaster recovery plan is what?
answer
to have a backup of your data
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What puts you at greater risk of being hacked?
answer
using a Web site that doesn't use encryption using email to respond to requests for personal information clicking on a URL instead of typing it in all of the above
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when were OCED privacy principles developed?
answer
1980
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Which OCED principle states that personal data should be protected by reasonable security measures against risks of disclosure, unauthorized access, misuse, modification, destruction, or loss?
answer
security Principal
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Which privacy law was passed in 1996?
answer
Health Insurance Privacy and Accountability Act
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A cookie contains info stored in how many fields?
answer
seven fields
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The crime of posing as someone else for fraudulent purposes is known as what?
answer
identity theft
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A combo of encryption and decryption methods is what?
answer
crytosystem
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what is the mode in which a virus worm or other malware gets into your computer?
answer
vector of attack
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What may result from malware?
answer
spam sent from your computer secure information obtained from your computer contents erased on the hard drive
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question
When the send button is clicked what happens?
answer
two copies of the message are produced
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