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 display an alert
toFixed(digitCount)
document.getElementById("CheckboxId").checked = true; //Could also be false
Underscores
alert("Alert Text Here")

2. Date object method used to return a string containing the date and time
document.getElementById("TextBoxId").focus;
document.writeln("Text Here") //Advances to new line after text
toString()
alert("Alert Text Here")

3. To access the text element in a <span> tag
===
Src - e.g. <script src="fileName.js"> //
expression
document.getElementById("spanId").firstChild;

4. To set the digit precision of a decimal number
(Condition_Expression) ? Value_If_True : Value_If_False;
setMilliseconds()
toFixed(digitCount)
Math.floor(number)

5. To create a function in JavaScript
document.getElementById("radioButtonId").checked;
var functionName = function(param1, param2, paramN) {}
r
Multi line

6. The string escape sequence to insert a tab in JavaScript
prompt("Text Here")
alert("Alert Text Here")
t
document.getElementById("spanId").firstChild;

7. To assign actions to the window onLoad event
window.onload = function() {//actions here}
Math.random() //Returns a value >= 0.0 but <1.0
Math.round(number)
toExponential(digits)

8. String object method used to return a new string that contains part of the original string from the specified start position and up to but not including the specified stop index
toString()
Math.floor(number)
substring(startIndex, stopIndex)
document.getElementById("CheckboxId").checked = true; //Could also be false

9. To declare a variable in JavaScript
var stringVar = "part 1:" + "part 2";
focus
var variableName;
Objects

10. To get the current value for textboxes
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("TextBoxId").value;
document.getElementById("radioButtonId").checked;
global

11. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
(Condition_Expression) ? Value_If_True : Value_If_False;
Math.ceil(number)
window.location = "New Web Address Here";
Underscores

12. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Math.floor(number)
<script type="text/javascript">.....</script>
Number.NEGATIVE_INFINITY
document.getElementById("CheckboxId").checked = true; //Could also be false

13. To assign the return value of confirm() to a variable
toString()
Objects
var answerVar = confirm("Message Text Here")
===

14. To get the text value of the control for radio buttons
Charset
document.getElementById("checkboxId").value;
document.getElementById("CheckboxId").checked = true; //Could also be false
var stringVar = "part 1:" + "part 2";

15. To concatenate multiple parts into a string
Charset
toPrecision(precision)
var stringVar = "part 1:" + "part 2";
charAt(position)

16. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
Src - e.g. <script src="fileName.js"> //
Math.min(var1, var2, varN)
Use the second parameter. Example: prompt("Enter Age:", "18")
setMilliseconds()

17. A _______ variable can be changed and accessed from within and without a function or object.
n
var stringVar = "part 1:" + "part 2";
global
prompt("Text Here")

18. What String object method returns a new string containing the value of the original string but in all lower case
===
toUpperCase()
toLowerCase()
focus

19. The string escape sequence to start a new line in JavaScript
if (condition) {}
n
focus
isNaN(varHere) //Returns true or false.

20. To write text to the current element of the DOM
document.write("Text Here") //Remains on current line
Use the second parameter. Example: prompt("Enter Age:", "18")
string
document.getElementById("radioButtonId").checked;

21. Math object method used to return a random number
document.getElementById("TextBoxId").value;
Multi line
var arrayVar = new Array()
Math.random() //Returns a value >= 0.0 but <1.0

22. To get the current value of the control for a text area
document.getElementById("textAreaId").value;
Math.sqrt(number)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
event handler .

23. String object method used to return the position of the first instance of a specified search string starting from the specified index
document.getElementById("checkboxId").checked;
document.getElementById("spanId").firstChild.nodeValue = "New Value";
var arrayVar = new Array()
indexOf(searchValue, startPosition)

24. The format to create a new Date object from a string
var dateObject = new Date("11/22/2012 18:25:35")
Math.ceil(number)
<script type="text/javascript">.....</script>
confirm()

25. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
isNaN(varHere) //Returns true or false.
if (condition) {}
Either single or double quotes surrounding the data
focus

26. Number object method used to return a numerical string with the specified number of significant digits
Use the second parameter. Example: prompt("Enter Age:", "18")
if (condition) {}
===
toPrecision(precision)

27. To denote a string in JavaScript
Either single or double quotes surrounding the data
setMilliseconds()
confirm()
while (condition) {}

28. To get the text value of the control for radio buttons
window.onload = function() {//actions here}
var functionName = function(param1, param2, paramN) {}
document.getElementById("radioButtonId").value;
toLowerCase()

29. This returns only True or false values
charAt(position)
Charset
document.getElementById("checkboxId").checked;
confirm()

30. To assign a default value to a prompt
v
'
t
Use the second parameter. Example: prompt("Enter Age:", "18")

31. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
<noscript>
standard equality operators
document.getElementById("listId").value;

32. To create a function that returns a value in JavaScript
Math.pow(number, power)
string
var functionName = function(param1, param2, paramN) {}
Use the second parameter. Example: prompt("Enter Age:", "18")

33. The string escape sequence to insert a form feed in JavaScript
ondblclick
standard equality operators
f
alert("Alert Text Here")

34. To view the current web address using JavaScript
window.location()
document.getElementById("checkboxId").checked;
Use the second parameter. Example: prompt("Enter Age:", "18")
v

35. Date object method used to return a string containing the time
document.getElementById("checkboxId").checked;
toString(base)
toTimeString()
document.getElementById("TextBoxId").focus;

36. Math object method used to return a given number rounded to the next lowest integer value
Math.floor(number)
Math.min(var1, var2, varN)
sensitive
Math.max(var1, var2, varN)

37. Command to display a prompt
setMilliseconds()
prompt("Text Here")
Either single or double quotes surrounding the data
event handler .

38. The four attributes of the <script> tag:Type - Src - _____ and Defer
semicolon ";"
sensitive
Charset
confirm("Message Text Here")

39. To create an Array object in JavaScript
while (condition) {}
ondblclick
var arrayVar = new Array()
Math.ceil(number)

40. The escape sequence used to insert a Unicode character into a string in JavaScript
toPrecision(precision)
udddd
document.getElementById("TextBoxId").disabled = true;
window.location()

41. Date object method used to return a string containing the date
redeclare
toDateString()
alert("Alert Text Here")
document.writeln("Text Here") //Advances to new line after text

42. Math object method used to return a given number that has been rounded to the closes integer value
Math.round(number)
charAt(position)
for (counter; condition; incrementor) {}
var arrayVar = new Array()

43. A statement that yields a value
string
Multi line
getFullYear()
expression

44. To insert Javascript into a web page
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("TextBoxId").disabled = true;
standard equality operators
<script type="text/javascript">.....</script>

45. To set the current checked status of the control for radio buttons
var stringVar = "part 1:" + "part 2";
document.getElementById("listId").value;
document.writeln("Text Here") //Advances to new line after text
document.getElementById("radioButtonId").checked = true; //Could also be false

46. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
var arrayVar = new Array()
ondblclick
document.getElementById("checkboxId").checked;
substring(startIndex)

47. What String object method returns a new string containing the value of the original string but in all upper case
toUpperCase()
global
"
(Condition_Expression) ? Value_If_True : Value_If_False;

48. Number object method used to return a string with a given number base
toString(base)
document.getElementById("radioButtonId").checked;
\
document.getElementById("listId").value;

49. To set the control to be disabled for textboxes
semicolon ";"
document.getElementById("spanId").firstChild;
global
document.getElementById("TextBoxId").disabled = true;

50. Number object method used to return a number in exponential format with the specified number of decimal places
t
var stringVar = "part 1:" + "part 2";
toExponential(digits)
redeclare