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. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
Math.ceil(number)
if (condition) {}
var functionName = function(param1, param2, paramN) {}
ondblclick

2. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
var dateObject = new Date("11/22/2012 18:25:35")
focus
t
var stringVar = prompt("Text Here")

3. To set the current value of the control for a text area
document.getElementById("CheckboxId").checked = true; //Could also be false
document.getElementById("textAreaId").value = "Text Value";
Math.max(var1, var2, varN)
global

4. To concatenate multiple parts into a string
document.getElementById("radioButtonId").value;
var stringVar = "part 1:" + "part 2";
Math.sqrt(number)
charAt(position)

5. Number object method used to round numbers to the specified number of decimal places
Math.sqrt(number)
confirm("Message Text Here")
toFixed(digits)
document.getElementById("spanId").firstChild.nodeValue = "New Value";

6. Math object method used to return a given number raised to a given power
Math.floor(number)
document.getElementById("radioButtonId").checked;
Math.pow(number, power)
var dateObject = new Date("11/22/2012 18:25:35")

7. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
var functionName = function(param1, param2, paramN) {}
prompt("Text Here")
getFullYear()

8. To insert Javascript into a web page
Math.pow(number, power)
while (condition) {}
global
<script type="text/javascript">.....</script>

9. What String object method returns a new string containing the value of the original string but in all lower case
global
\
toLowerCase()
document.write("Text Here") //Remains on current line

10. Unlike ________________ identity operators do not perform type coercion.
if (condition) {}
Src - e.g. <script src="fileName.js"> //
window.location()
standard equality operators

11. Math object method used to return the lowest value for a set of supplied numbers
confirm()
Math.min(var1, var2, varN)
toPrecision(precision)
<script type="text/javascript">.....</script>

12. Math object method used to return the square root of a given number
Math.sqrt(number)
document.getElementById("CheckboxId").checked = true; //Could also be false
toString(base)
document.getElementById("listId").value;

13. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
Math.round(number)
document.getElementById("ButtonId").onclick = functionName;
"
event handler .

14. To write text to the current element of the DOM
alert("Alert Text Here")
document.write("Text Here") //Remains on current line
Objects
document.getElementById("textAreaId").value;

15. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
window.onload = function() {//actions here}
confirm("Message Text Here")
Use the second parameter. Example: prompt("Enter Age:", "18")
setMilliseconds()

16. A statement that yields a value
Number.NEGATIVE_INFINITY
document.getElementById("radioButtonId").checked;
expression
standard equality operators

17. 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

18. To alter the value of the text element in a span tag
var stringVar = prompt("Text Here")
Math.sqrt(number)
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("spanId").firstChild.nodeValue = "New Value";

19. To denote a string in JavaScript
Either single or double quotes surrounding the data
window.location = "New Web Address Here";
var stringVar = "part 1:" + "part 2";
var dateVar = new Date()

20. To assign actions to the window onLoad event
Either single or double quotes surrounding the data
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
toUpperCase()
window.onload = function() {//actions here}

21. The string escape sequence to insert a form feed in JavaScript
Two forward slashes "//"
redeclare
document.getElementById(id)
f

22. What Date object method is used to return the number of milliseconds since the start of GMT
getFullYear()
isNaN(varHere) //Returns true or false.
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
getTime()

23. The string escape sequence to insert a double quote in JavaScript
alert("Alert Text Here")
var dateVar = new Date()
"
Math.ceil(number)

24. The string escape sequence to insert a backslash in JavaScript
\
document.getElementById("TextBoxId").focus;
\
Two forward slashes "//"

25. String object method used to get the character at a specified index position
Number.NEGATIVE_INFINITY
charAt(position)
Either single or double quotes surrounding the data
r

26. ________ comments start with / and end with /.
Two forward slashes "//"
toTimeString()
Multi line
alert("Alert Text Here")

27. The identity operator for not equal
getTime()
!==
document.getElementById("spanId").firstChild.nodeValue = "New Value";
toDateString()

28. This returns only True or false values
isNaN(varHere) //Returns true or false.
confirm()
<noscript>
"

29. To create a Date object in JavaScript
event handler .
var dateVar = new Date()
global
Charset

30. What String object method returns a new string containing the value of the original string but in all upper case
toUpperCase()
t
document.getElementById("CheckboxId").checked = true; //Could also be false
isNaN(varHere) //Returns true or false.

31. String object method used to concatenate multiple strings
document.getElementById("radioButtonId").checked;
var functionName = function(param1, param2, paramN) {}
concat(var1, var2, varN)
Two forward slashes "//"

32. To create a function that returns a value in JavaScript
var variableName;
var functionName = function(param1, param2, paramN) {}
Src - e.g. <script src="fileName.js"> //
document.writeln("Text Here") //Advances to new line after text

33. To get the value or the currently selected item for lists
toString(base)
concat(var1, var2, varN)
document.getElementById("radioButtonId").checked;
document.getElementById("listId").value;

34. To get the text value of the control for radio buttons
document.getElementById("spanId").firstChild;
'
document.getElementById("radioButtonId").value;
prompt("Text Here")

35. JavaScript is case _______
Math.max(var1, var2, varN)
expression
sensitive
global

36. Number object method used to return a string with a given number base
toString(base)
document.getElementById("spanId").firstChild;
Math.sqrt(number)
focus

37. Date object method used to return a string containing the date
substring(startIndex, stopIndex)
concat(var1, var2, varN)
sensitive
toDateString()

38. To display an alert
Either single or double quotes surrounding the data
setMilliseconds()
alert("Alert Text Here")
var dateVar = new Date()

39. To create an Array object in JavaScript
v
var arrayVar = new Array()
setMilliseconds()
window.location()

40. Math object method used to return a given number that has been rounded to the closes integer value
document.getElementById("TextBoxId").focus;
Math.round(number)
document.getElementById("listId").value;
toPrecision(precision)

41. To make the browser load a new page using JavaScript
document.getElementById("ButtonId").onclick = functionName;
toExponential(digits)
window.location = "New Web Address Here";
document.getElementById("textAreaId").value;

42. The string escape sequence to insert a carriage return in JavaScript
r
t
event handler .
document.writeln("Text Here") //Advances to new line after text

43. To get the current value of the control for a text area
Underscores
document.getElementById("listId").value;
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("textAreaId").value;

44. Math object method used to return the absolute value of a given number
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.abs(number)
toFixed(digits)
setMilliseconds()

45. Number object method used to return a number in exponential format with the specified number of decimal places
Math.random() //Returns a value >= 0.0 but <1.0
toExponential(digits)
f
document.write("Text Here") //Remains on current line

46. String object method used to return a new string that contains part of the original string from the specified start position
Math.pow(number, power)
substring(startIndex)
Math.ceil(number)
document.getElementById(id)

47. The _____ attribute is used to denote external file for script use
Either single or double quotes surrounding the data
Two forward slashes "//"
var functionName = function(param1, param2, paramN) {}
Src - e.g. <script src="fileName.js"> //

48. To code a for statement in JavaScript
document.getElementById("TextBoxId").focus;
Math.ceil(number)
substring(startIndex)
for (counter; condition; incrementor) {}

49. To set focus on the control for textboxes
sensitive
string
document.getElementById("TextBoxId").focus;
Math.abs(number)

50. To create a function in JavaScript
var functionName = function(param1, param2, paramN) {}
<noscript>
toFixed(digits)
toTimeString()