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 create a Date object in JavaScript
toString()
document.getElementById("checkboxId").value;
var dateVar = new Date()
document.getElementById("TextBoxId").focus;

2. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Number.NEGATIVE_INFINITY
Math.sqrt(number)
isNaN(varHere) //Returns true or false.
standard equality operators

3. To create a function that returns a value in JavaScript
var functionName = function(param1, param2, paramN) {}
toTimeString()
substring(startIndex, stopIndex)
Underscores

4. Math object method used to return the absolute value of a given number
Src - e.g. <script src="fileName.js"> //
for (counter; condition; incrementor) {}
document.getElementById("radioButtonId").checked;
Math.abs(number)

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

6. To alter the value of the text element in a span tag
sensitive
document.getElementById("spanId").firstChild.nodeValue = "New Value";
\
Math.min(var1, var2, varN)

7. Math object method used to return a random number
r
prompt("Text Here")
Math.random() //Returns a value >= 0.0 but <1.0
var dateObject = new Date("11/22/2012 18:25:35")

8. To display an alert
document.getElementById("textAreaId").value = "Text Value";
Two forward slashes "//"
toTimeString()
alert("Alert Text Here")

9. To insert Javascript into a web page
<script type="text/javascript">.....</script>
toDateString()
document.getElementById("textAreaId").value;
if (condition) {}

10. The identity operator for not equal
document.getElementById("TextBoxId").disabled = true;
Underscores
!==
Math.min(var1, var2, varN)

11. To access the text element in a <span> tag
Math.pow(number, power)
var variableName;
global
document.getElementById("spanId").firstChild;

12. Math object method used to return a given number raised to a given power
window.location()
getFullYear()
toUpperCase()
Math.pow(number, power)

13. To set focus on the control for textboxes
document.getElementById("TextBoxId").focus;
Math.min(var1, var2, varN)
for (counter; condition; incrementor) {}
document.getElementById("radioButtonId").checked = true; //Could also be false

14. The string escape sequence to insert a double quote in JavaScript
"
document.getElementById("spanId").firstChild.nodeValue = "New Value";
for (counter; condition; incrementor) {}
document.writeln("Text Here") //Advances to new line after text

15. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
substring(startIndex, stopIndex)
<noscript>
toUpperCase()
document.getElementById("radioButtonId").checked;

16. The identity operator for equals
Math.pow(number, power)
expression
===
document.getElementById("TextBoxId").disabled = true;

17. To declare a variable in JavaScript
getFullYear()
document.getElementById("textAreaId").value;
alert("Alert Text Here")
var variableName;

18. To assign actions to the window onLoad event
document.getElementById("ButtonId").onclick = functionName;
window.onload = function() {//actions here}
Math.round(number)
Math.pow(number, power)

19. To set the current value of the control for a text area
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
prompt("Text Here")
Math.sqrt(number)
document.getElementById("textAreaId").value = "Text Value";

20. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
toString()
getFullYear()
Math.round(number)
n

21. To code a button.onclick event handler
document.getElementById("ButtonId").onclick = functionName;
toDateString()
while (condition) {}
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

22. The string escape sequence to insert a vertical tab in JavaScript
toFixed(digitCount)
document.getElementById("TextBoxId").focus;
document.getElementById("radioButtonId").checked;
v

23. When you add a string and a number the result will be a ____
concat(var1, var2, varN)
string
getFullYear()
toDateString()

24. Command to display a prompt
sensitive
prompt("Text Here")
toLowerCase()
Math.pow(number, power)

25. To denote a string in JavaScript
isNaN(varHere) //Returns true or false.
Underscores
document.getElementById("CheckboxId").checked = true; //Could also be false
Either single or double quotes surrounding the data

26. To make the browser load a new page using JavaScript
window.onload = function() {//actions here}
isNaN(varHere) //Returns true or false.
concat(var1, var2, varN)
window.location = "New Web Address Here";

27. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
Math.round(number)
setMilliseconds()
var stringVar = prompt("Text Here")

28. To view the current web address using JavaScript
v
sensitive
window.location()
document.getElementById("spanId").firstChild;

29. To code an If statement in JavaScript
for (counter; condition; incrementor) {}
indexOf(searchValue, startPosition)
if (condition) {}
prompt("Text Here")

30. The escape sequence used to insert a Unicode character into a string in JavaScript
Multi line
if (condition) {}
Math.sqrt(number)
udddd

31. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
document.getElementById("checkboxId").checked;
Src - e.g. <script src="fileName.js"> //
setMilliseconds()
n

32. The string escape sequence to insert a form feed in JavaScript
"
for (counter; condition; incrementor) {}
Math.abs(number)
f

33. Math object method used to return the lowest value for a set of supplied numbers
confirm("Message Text Here")
document.getElementById("listId").value;
Math.min(var1, var2, varN)
ondblclick

34. To get the current checked status of the control for radio buttons
string
Two forward slashes "//"
document.getElementById("radioButtonId").checked;
window.location()

35. To display a confirmation
toLowerCase()
confirm("Message Text Here")
document.getElementById("spanId").firstChild;
Two forward slashes "//"

36. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
toDateString()
Math.pow(number, power)
focus
window.location()

37. Math object method used to return a given number rounded to the next lowest integer value
global
Math.floor(number)
document.getElementById("textAreaId").value;
prompt("Text Here")

38. To get the text value of the control for radio buttons
r
document.getElementById("checkboxId").value;
n
toString()

39. The _____ attribute is used to denote external file for script use
Number.NEGATIVE_INFINITY
Math.ceil(number)
Src - e.g. <script src="fileName.js"> //
Two forward slashes "//"

40. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
document.getElementById("radioButtonId").checked = true; //Could also be false
toFixed(digitCount)
ondblclick
getFullYear()

41. To get the text value of the control for radio buttons
document.getElementById("radioButtonId").value;
var functionName = function(param1, param2, paramN) {}
getFullYear()
prompt("Text Here")

42. Date object method used to return a string containing the date
toDateString()
getTime()
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("spanId").firstChild.nodeValue = "New Value";

43. To access a page element by id
toLowerCase()
document.getElementById(id)
document.getElementById("spanId").firstChild.nodeValue = "New Value";
var functionName = function(param1, param2, paramN) {}

44. Date object method used to return a string containing the time
concat(var1, var2, varN)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toString()
toTimeString()

45. The string escape sequence to insert a carriage return in JavaScript
Math.max(var1, var2, varN)
Math.pow(number, power)
var dateObject = new Date("11/22/2012 18:25:35")
r

46. To set the control to be disabled for textboxes
getTime()
Math.random() //Returns a value >= 0.0 but <1.0
redeclare
document.getElementById("TextBoxId").disabled = true;

47. To write text to the current element of the DOM
Two forward slashes "//"
Math.random() //Returns a value >= 0.0 but <1.0
Math.min(var1, var2, varN)
document.write("Text Here") //Remains on current line

48. To get the value or the currently selected item for lists
Multi line
alert("Alert Text Here")
toLowerCase()
document.getElementById("listId").value;

49. 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)
for (counter; condition; incrementor) {}
charAt(position)

50. Math object method used to return the highest value from a set of supplied numbers
document.getElementById("TextBoxId").focus;
var functionName = function(param1, param2, paramN) {}
Math.max(var1, var2, varN)
substring(startIndex)