Section 1
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In the following line the word document is a(n) ______ that resides in the computer's memory. document.writeln("Hello World");
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Date created
Mar 14, 2020
Cards (59)
Section 1
(50 cards)
In the following line the word document is a(n) ______ that resides in the computer's memory. document.writeln("Hello World");
Object
What is the value of num after the following statement is performed? num = 2 * Math.pow( 2, 3 );
16
A procedure for solving a problem in terms of the actions to be executed and the order in which these actions are to be executed is called ________.
an algorithm
Research determined that all programs could be written in terms of only three control structures. Which of the following is not one of the three control structures?
goto-less structure
What should you use as a counter in counter-controlled repetition?
an integer
Which of the following statements is correct?
if ( studentGrade >= 60 ) document.write( "Passed" );
What type of loop is shown in the script below? <script type = "text/javascript"> var gradeValue = 0, total = 0, grade = 0; while ( gradeValue != - 1 ) { total = total + gradeValue; grade = window.prompt( "Enter Integer Grade, -1 to Quit:" , "0" ); gradeValue = parseInt( grade ); } </script> a) counter controlled b) sentinel controlled c) algorithm controlled d) stepwise controlled
sentinel controlled
What is the value of num after the following statements are performed? num = 2.4589; num = num.toFixed( 2 );
2.46
Which of the following operators associates from right to left?
=
Which of the following is not a valid variable name?
12footage
What output will the following script produce? var i = 0; var j = 3; var counter = 0; while ( i < 5 ) { if (i != j) counter = counter + i; i = i + 1 } document.write( counter );
7
Which of the following is the correct abbreviation for the statement a = a * 7; ?
a *= 7;
What would the browser display if the following code were executed in a script? var x = 11; var y = 14; if ( x > 13 ) if ( y > 13 ) document.writeln( "x and y are > 13" ); else document.writeln( "x is <= 13" );
nothing
Which of the following statements would correctly print out the sentence "Hello World" in blue?
document.write( "<p style = \"color: blue\">"); document.write( "Hello World </p>");
What is the result of the statement 17 % 5?
2
What type of loop should be used in a script that processes test results for 150 students?
counter controlled
What would the browser display if the following code were executed in a script? var product = 0; while (product >= 25) product = 2 + product; document.writeln( product );
0
If the string passed to parseInt contains text characters, parseInt will ________.
return NaN
Which of the following flowchart symbols can represent an if statement?
diamond
The word sequence in the term sequence structure refers to the sequence of ________.
JavaScript instructions in a script
The word top in the term top-down stepwise refinement refers to which of the following?
the single statement that completely represents the script
What will the browser display if the following script is executed and the user enters 5 at both prompts? <script type = "text/javascript"> <!-- var firstNumber = window.prompt( "Enter an integer", "0" ); var secondNumber= window.prompt( "Enter an integer", "0" ); var thirdNumber; thirdNumber = firstNumber + secondNumber; document.write( thirdNumber ); //--> </script>
55
What is the output of the following script? i = 16; document.write( ++i );
17
If the initial value of a is 15, what new value is assigned to a in the expression a %= 4?
3
A program in which all statements are executed one after the other in the order in which they are written exhibits ________.
sequential execution
________ is an informal language that helps programmers develop algorithms.
Pseudocode
Which of the following is a JavaScript repetition statement?
do...while
An alert dialog displaying the text "Welcome!" is created by calling _________.
window.alert( "Welcome!" );
In the following line, the word writeln is a(n) _________ that performs a task or action in the script. document.writeln("Hello World");
Method
Which of the following is declared correctly and will not result in an error, assuming x = 2 and y = 30?
for ( var j = x; j <= 80 * y; j += 5 / x )
What would the browser display if the following script were executed? <script type = "text/javascript"> var count = 0; var total = 0; while ( count <= 5 ) { total = total + 10; count = count + 1; } document.write( total ); </script>
60
If the string passed to parseInt contains a floating-point numeric value, parseInt will ________.
truncate the floating-point part to be left with an integer value
What is the value of i after the following statements? i = 2; i--; i--;
0
Which of the following is not a valid JavaScript equality or relational operator?
=
Which of the following is not a JavaScript selection statement?
for...in
What would the browser display if the following script were executed? <script type = "text/javascript"> <!-- for ( var i = 0; i < 5; i++ ) document.write( "O" ); //--> </script>
OOOOO
Which of the following sequences does not follow the rules of operator precedence? Assume that operators are evaluated in the order listed from left to right.
parentheses, subtraction, modulus
What would the browser display if the following script were executed? <script type = "text/javascript"> var count = 5; var total = 0; while ( count > -1 ) { total = total - 10; count = count - 1; } document.write( total ); </script>
-60
What would the browser display if the following code were executed in a script? var product = 0; while ( product <= 25 ); product = 2 + product;
nothing, the script would result in an inifite-loop error
Which of the following is not a JavaScript keyword?
sub
Which of the following flowchart symbols indicates that a decision is to be made?
diamond
Specifying the order in which programming statements are to be executed is called ________.
program control
Whenever a value is placed in a memory location, the value________.
replaces the previous value in that location
What does the following expression evaluate to? ( ( 3 + ( 5 + 4 ) * 7 ) + 4 ) / 5
14
Consider the following HTML5 code. <html> <script type = "text/javascript"> <!-- <!-- document.writeln("Hello World"); --> //--> </script> </html> What would a browser capable of scripting display when executing this code? document.writeln("Hello World </p>"); //--> </script> </html>
Nothing
What is the value of i after the following statements? i = 2; i++;
3
What would the browser display if the following code were executed in a script? var grade = 59; if ( grade >= 60 ) document.writeln( "Passed." ); else document.write( "Failed. " ); document.writeln( "You must take this course again." );
Failed. You must take this course again.
What would the browser display if the following script were executed? <script type = "text/javascript"> <!-- for ( var i = 0; var i < 5; var i++ ) document.write( "X" ); //--> </script>
XXXXX
Consider the following script. What is wrong with the following code? <script type = "text/javascript"> var firstNumber; thirdNumber; firstNumber = window.prompt("Enter an integer", "0"); secondNumber = window.prompt("Enter an integer", "0"); thirdNumber = firstNumber + secondNumber; </script>
The word var must be placed before thirdNumber in line 3.
Which of the following is not required for counter-controlled repetition?
sentinel
Section 2
(9 cards)