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Javascript Basics

Subject : it-skills

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Number object method used to return a number in exponential format with the specified number of decimal places
Math.floor(number)
document.getElementById("ButtonId").onclick = functionName;
var stringVar = prompt("Text Here")
toExponential(digits)

2. To assign the return value of confirm() to a variable
var answerVar = confirm("Message Text Here")
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.round(number)
document.getElementById("TextBoxId").disabled = true;

3. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
var stringVar = prompt("Text Here")
'
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

4. To display a confirmation
document.getElementById("listId").value;
Either single or double quotes surrounding the data
confirm("Message Text Here")
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

5. Math object method used to return the lowest value for a set of supplied numbers
Math.min(var1, var2, varN)
Either single or double quotes surrounding the data
isNaN(varHere) //Returns true or false.
Math.abs(number)

6. The four attributes of the <script> tag:Type - Src - _____ and Defer
v
Underscores
n
Charset

7. To create a function in JavaScript
Math.floor(number)
document.getElementById("TextBoxId").focus;
var functionName = function(param1, param2, paramN) {}
Math.max(var1, var2, varN)

8. Date object method used to return a string containing the date
substring(startIndex)
toDateString()
document.getElementById("textAreaId").value = "Text Value";
getFullYear()

9. To set the current value of the control for a text area
document.write("Text Here") //Remains on current line
confirm("Message Text Here")
var variableName;
document.getElementById("textAreaId").value = "Text Value";

10. To display an alert
document.getElementById("radioButtonId").value;
var dateVar = new Date()
global
alert("Alert Text Here")

11. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
event handler .
r
!==
Objects

12. To write a line to the current element of the DOM (Document Object Model)
document.getElementById("TextBoxId").focus;
document.getElementById("textAreaId").value;
var dateVar = new Date()
document.writeln("Text Here") //Advances to new line after text

13. The identity operator for not equal
!==
toTimeString()
alert("Alert Text Here")
confirm()

14. To assign a default value to a prompt
toLowerCase()
setMilliseconds()
Use the second parameter. Example: prompt("Enter Age:", "18")
confirm()

15. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
document.getElementById("radioButtonId").checked = true; //Could also be false
focus
document.getElementById("textAreaId").value;

16. To set the digit precision of a decimal number
v
toString()
var stringVar = prompt("Text Here")
toFixed(digitCount)

17. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
toTimeString()
document.getElementById("TextBoxId").value;
Math.max(var1, var2, varN)
<noscript>

18. JavaScript is case _______
document.getElementById("checkboxId").checked;
event handler .
document.getElementById("TextBoxId").value;
sensitive

19. Math object method used to return the absolute value of a given number
Math.abs(number)
toUpperCase()
indexOf(searchValue, startPosition)
var dateObject = new Date("11/22/2012 18:25:35")

20. To insert Javascript into a web page
prompt("Text Here")
<script type="text/javascript">.....</script>
substring(startIndex)
<noscript>

21. ________ comments start with / and end with /.
redeclare
===
Multi line
toPrecision(precision)

22. To write text to the current element of the DOM
document.writeln("Text Here") //Advances to new line after text
Charset
document.write("Text Here") //Remains on current line
document.getElementById("checkboxId").value;

23. To assign the value from a prompt to a non-string variable
setMilliseconds()
document.getElementById("checkboxId").value;
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
standard equality operators

24. Number object method used to round numbers to the specified number of decimal places
document.getElementById("ButtonId").onclick = functionName;
document.getElementById("checkboxId").value;
toFixed(digits)
getFullYear()

25. To create an Array object in JavaScript
var arrayVar = new Array()
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("TextBoxId").focus;
Charset

26. String object method used to return the position of the first instance of a specified search string starting from the specified index
substring(startIndex)
document.getElementById("radioButtonId").value;
indexOf(searchValue, startPosition)
toPrecision(precision)

27. The syntax of a conditional operator
Math.sqrt(number)
(Condition_Expression) ? Value_If_True : Value_If_False;
Src - e.g. <script src="fileName.js"> //
Charset

28. To denote a string in JavaScript
Math.round(number)
'
Either single or double quotes surrounding the data
toString()

29. The _____ attribute is used to denote external file for script use
document.getElementById("CheckboxId").checked = true; //Could also be false
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Src - e.g. <script src="fileName.js"> //
focus

30. To access a page element by id
redeclare
document.getElementById(id)
Underscores
document.getElementById("TextBoxId").value;

31. Date object method used to return a string containing the date and time
toString()
var arrayVar = new Array()
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("textAreaId").value = "Text Value";

32. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
toLowerCase()
ondblclick
Underscores
standard equality operators

33. What String object method returns a new string containing the value of the original string but in all lower case
Math.ceil(number)
Underscores
toLowerCase()
while (condition) {}

34. The string escape sequence to insert a single quote in JavaScript

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

35. To make the browser load a new page using JavaScript
\
Objects
window.location = "New Web Address Here";
toFixed(digits)

36. To assign the value from a prompt to a string
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.writeln("Text Here") //Advances to new line after text
document.write("Text Here") //Remains on current line
var stringVar = prompt("Text Here")

37. What String object method returns a new string containing the value of the original string but in all upper case
document.getElementById("spanId").firstChild.nodeValue = "New Value";
toString(base)
toExponential(digits)
toUpperCase()

38. To assign actions to the window onLoad event
window.onload = function() {//actions here}
expression
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toString()

39. What Date object method is used to return the number of milliseconds since the start of GMT
'
Math.min(var1, var2, varN)
getTime()
toDateString()

40. The string escape sequence to insert a carriage return in JavaScript
'
r
getTime()
document.getElementById("CheckboxId").checked = true; //Could also be false

41. String object method used to get the character at a specified index position
document.writeln("Text Here") //Advances to new line after text
getTime()
Math.round(number)
charAt(position)

42. To code a for statement in JavaScript
Math.min(var1, var2, varN)
Underscores
toTimeString()
for (counter; condition; incrementor) {}

43. To create a single line comment in JavaScript
Underscores
var functionName = function(param1, param2, paramN) {}
document.getElementById("TextBoxId").focus;
Two forward slashes "//"

44. To set the current checked status of the control for radio buttons
toFixed(digits)
var dateVar = new Date()
Multi line
document.getElementById("radioButtonId").checked = true; //Could also be false

45. The format to create a new Date object from a string
expression
Math.min(var1, var2, varN)
window.location()
var dateObject = new Date("11/22/2012 18:25:35")

46. To code a button.onclick event handler
Objects
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("ButtonId").onclick = functionName;
window.location = "New Web Address Here";

47. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
focus
Math.ceil(number)
var stringVar = "part 1:" + "part 2";
!==

48. The string escape sequence to start a new line in JavaScript
toTimeString()
toFixed(digitCount)
Underscores
n

49. To alter the value of the text element in a span tag
Charset
toString(base)
document.getElementById("spanId").firstChild.nodeValue = "New Value";
window.onload = function() {//actions here}

50. To set the control to be disabled for textboxes
document.writeln("Text Here") //Advances to new line after text
toLowerCase()
document.getElementById("TextBoxId").disabled = true;
Charset