Test your basic knowledge |

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. To code an If statement in JavaScript
v
if (condition) {}
Charset
global

2. To assign the return value of confirm() to a variable
document.getElementById("listId").value;
var answerVar = confirm("Message Text Here")
Src - e.g. <script src="fileName.js"> //
Math.floor(number)

3. The string escape sequence to insert a tab in JavaScript
Math.max(var1, var2, varN)
Number.NEGATIVE_INFINITY
toExponential(digits)
t

4. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
var functionName = function(param1, param2, paramN) {}
toFixed(digitCount)
getFullYear()
global

5. The four attributes of the <script> tag:Type - Src - _____ and Defer
getTime()
Charset
var functionName = function(param1, param2, paramN) {}
Underscores

6. To set the control to be disabled for textboxes
Src - e.g. <script src="fileName.js"> //
var variableName;
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
document.getElementById("TextBoxId").disabled = true;

7. A statement that yields a value
toTimeString()
prompt("Text Here")
document.getElementById("radioButtonId").checked;
expression

8. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
<script type="text/javascript">.....</script>
setMilliseconds()
!==
Math.ceil(number)

9. Math object method used to return a given number rounded to the next highest integer value
document.getElementById("TextBoxId").focus;
toFixed(digitCount)
Math.ceil(number)
for (counter; condition; incrementor) {}

10. To create a function that returns a value in JavaScript
toString()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Charset
var functionName = function(param1, param2, paramN) {}

11. The identity operator for equals
while (condition) {}
r
"
===

12. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Two forward slashes "//"
Number.NEGATIVE_INFINITY
document.getElementById("checkboxId").checked;
Multi line

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

14. Date object method used to return a string containing the date
var variableName;
toDateString()
document.getElementById("TextBoxId").disabled = true;
window.location()

15. To get the text value of the control for radio buttons
var arrayVar = new Array()
document.getElementById("checkboxId").value;
window.location()
sensitive

16. Number object method used to return a string with a given number base
document.getElementById("listId").value;
document.getElementById("TextBoxId").focus;
toString(base)
Charset

17. The format to create a new Date object from a string
Math.min(var1, var2, varN)
Either single or double quotes surrounding the data
var functionName = function(param1, param2, paramN) {}
var dateObject = new Date("11/22/2012 18:25:35")

18. To assign a default value to a prompt
window.location = "New Web Address Here";
window.onload = function() {//actions here}
Use the second parameter. Example: prompt("Enter Age:", "18")
toExponential(digits)

19. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
'
Objects
Underscores
string

20. String object method used to concatenate multiple strings
toFixed(digits)
Math.max(var1, var2, varN)
"
concat(var1, var2, varN)

21. Math object method used to return a given number rounded to the next lowest integer value
document.getElementById("checkboxId").value;
document.write("Text Here") //Remains on current line
Math.floor(number)
document.getElementById("radioButtonId").checked = true; //Could also be false

22. To set the current checked status of the control for radio buttons
<noscript>
var dateObject = new Date("11/22/2012 18:25:35")
document.getElementById("radioButtonId").checked = true; //Could also be false
substring(startIndex, stopIndex)

23. Math object method used to return the absolute value of a given number
if (condition) {}
while (condition) {}
Math.sqrt(number)
Math.abs(number)

24. To create a Date object in JavaScript
document.getElementById(id)
<script type="text/javascript">.....</script>
var dateVar = new Date()
\

25. To create an Array object in JavaScript
document.getElementById("radioButtonId").checked = true; //Could also be false
var arrayVar = new Array()
global
while (condition) {}

26. This returns only True or false values
document.getElementById("textAreaId").value;
document.getElementById("spanId").firstChild.nodeValue = "New Value";
confirm()
udddd

27. Unlike ________________ identity operators do not perform type coercion.
var stringVar = "part 1:" + "part 2";
standard equality operators
f
isNaN(varHere) //Returns true or false.

28. Date object method used to return a string containing the date and time
toString()
\
concat(var1, var2, varN)
document.getElementById("spanId").firstChild;

29. Statements end in JavaScript with a ________
document.write("Text Here") //Remains on current line
semicolon ";"
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("TextBoxId").value;

30. To get the text value of the control for radio buttons
string
'
Math.pow(number, power)
document.getElementById("radioButtonId").value;

31. To assign actions to the window onLoad event
substring(startIndex, stopIndex)
Math.ceil(number)
window.onload = function() {//actions here}
document.getElementById("CheckboxId").checked = true; //Could also be false

32. To display an alert
alert("Alert Text Here")
var stringVar = prompt("Text Here")
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
t

33. Command to display a prompt
prompt("Text Here")
n
Multi line
var dateObject = new Date("11/22/2012 18:25:35")

34. The string escape sequence to insert a form feed in JavaScript
confirm("Message Text Here")
if (condition) {}
Math.ceil(number)
f

35. The _____ attribute is used to denote external file for script use
confirm()
toFixed(digitCount)
document.getElementById("TextBoxId").disabled = true;
Src - e.g. <script src="fileName.js"> //

36. ________ comments start with / and end with /.
r
Math.sqrt(number)
substring(startIndex, stopIndex)
Multi line

37. To create a single line comment in JavaScript
Two forward slashes "//"
var answerVar = confirm("Message Text Here")
substring(startIndex, stopIndex)
document.getElementById("spanId").firstChild.nodeValue = "New Value";

38. To set focus on the control for textboxes
string
document.getElementById("checkboxId").value;
document.getElementById("TextBoxId").focus;
var answerVar = confirm("Message Text Here")

39. To view the current web address using JavaScript
f
document.getElementById("CheckboxId").checked = true; //Could also be false
window.location()
substring(startIndex, stopIndex)

40. To get the value or the currently selected item for lists
document.getElementById("listId").value;
document.getElementById("radioButtonId").checked;
Objects
standard equality operators

41. The escape sequence used to insert a Unicode character into a string in JavaScript
udddd
isNaN(varHere) //Returns true or false.
getTime()
document.getElementById("TextBoxId").value;

42. To access a page element by id
concat(var1, var2, varN)
Src - e.g. <script src="fileName.js"> //
setMilliseconds()
document.getElementById(id)

43. String object method used to return the position of the first instance of a specified search string starting from the specified index
indexOf(searchValue, startPosition)
var answerVar = confirm("Message Text Here")
Two forward slashes "//"
Math.max(var1, var2, varN)

44. Number object method used to return a numerical string with the specified number of significant digits
var answerVar = confirm("Message Text Here")
for (counter; condition; incrementor) {}
toPrecision(precision)
toUpperCase()

45. To access the text element in a <span> tag
===
charAt(position)
document.getElementById("spanId").firstChild;
<script type="text/javascript">.....</script>

46. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
semicolon ";"
<noscript>
"
udddd

47. The string escape sequence to insert a backslash in JavaScript
document.getElementById("TextBoxId").value;
toTimeString()
'
\

48. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
toPrecision(precision)
var dateObject = new Date("11/22/2012 18:25:35")
var arrayVar = new Array()
focus

49. Number object method used to return a number in exponential format with the specified number of decimal places
toUpperCase()
f
toExponential(digits)
while (condition) {}

50. To get the current checked status of the control for radio buttons
confirm("Message Text Here")
var arrayVar = new Array()
Math.max(var1, var2, varN)
document.getElementById("radioButtonId").checked;