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. What Date object method is used to return the number of milliseconds since the start of GMT
document.getElementById("TextBoxId").disabled = true;
getTime()
confirm()
Number.NEGATIVE_INFINITY

2. Date object method used to return a string containing the date
document.getElementById("radioButtonId").value;
var arrayVar = new Array()
toDateString()
Either single or double quotes surrounding the data

3. The string escape sequence to insert a form feed in JavaScript
redeclare
Underscores
f
alert("Alert Text Here")

4. To set the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked = true; //Could also be false
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
var stringVar = "part 1:" + "part 2";
Multi line

5. A _______ variable can be changed and accessed from within and without a function or object.
Charset
global
t
document.getElementById("radioButtonId").checked = true; //Could also be false

6. Math object method used to return a given number raised to a given power
Math.abs(number)
toFixed(digitCount)
Math.pow(number, power)
event handler .

7. To get the current value of the control for a text area
window.location = "New Web Address Here";
Multi line
document.getElementById("textAreaId").value;
var dateObject = new Date("11/22/2012 18:25:35")

8. The string escape sequence to insert a backslash in JavaScript
Multi line
Underscores
n
\

9. The identity operator for equals
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("TextBoxId").value;
concat(var1, var2, varN)
===

10. To declare a variable in JavaScript
semicolon ";"
var variableName;
var dateVar = new Date()
r

11. To get the current value for textboxes
Math.floor(number)
window.location()
document.getElementById(id)
document.getElementById("TextBoxId").value;

12. To code a for statement in JavaScript
getFullYear()
substring(startIndex)
var stringVar = "part 1:" + "part 2";
for (counter; condition; incrementor) {}

13. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
var variableName;
toString()
ondblclick

14. Date object method used to return a string containing the date and time
toString()
var functionName = function(param1, param2, paramN) {}
toString(base)
Two forward slashes "//"

15. To assign actions to the window onLoad event
<noscript>
window.onload = function() {//actions here}
r
document.getElementById(id)

16. The string escape sequence to insert a tab in JavaScript
n
t
Math.round(number)
toTimeString()

17. Math object method used to return the absolute value of a given number
window.onload = function() {//actions here}
\
getTime()
Math.abs(number)

18. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
substring(startIndex, stopIndex)
Number.NEGATIVE_INFINITY
Objects
Math.min(var1, var2, varN)

19. The string escape sequence to insert a vertical tab in JavaScript
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
v
var dateObject = new Date("11/22/2012 18:25:35")
document.getElementById("TextBoxId").value;

20. To denote a string in JavaScript
Math.pow(number, power)
Either single or double quotes surrounding the data
document.getElementById("spanId").firstChild;
Math.abs(number)

21. This returns only True or false values
document.getElementById("TextBoxId").value;
confirm()
event handler .
toDateString()

22. String object method used to concatenate multiple strings
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
charAt(position)
Math.floor(number)
concat(var1, var2, varN)

23. To get the text value of the control for radio buttons
concat(var1, var2, varN)
document.getElementById("radioButtonId").value;
var functionName = function(param1, param2, paramN) {}
focus

24. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Math.sqrt(number)
Underscores
substring(startIndex, stopIndex)
document.getElementById(id)

25. To write a line to the current element of the DOM (Document Object Model)
document.getElementById("textAreaId").value;
!==
Charset
document.writeln("Text Here") //Advances to new line after text

26. String object method used to return the position of the first instance of a specified search string starting from the specified index
f
indexOf(searchValue, startPosition)
Math.pow(number, power)
v

27. To create a new Date object
window.location()
focus
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("TextBoxId").value;

28. To get the current checked status of the control for radio buttons
Number.NEGATIVE_INFINITY
toTimeString()
Math.min(var1, var2, varN)
document.getElementById("radioButtonId").checked;

29. To insert Javascript into a web page
toLowerCase()
var stringVar = prompt("Text Here")
document.getElementById("TextBoxId").value;
<script type="text/javascript">.....</script>

30. What String object method returns a new string containing the value of the original string but in all lower case
var stringVar = "part 1:" + "part 2";
concat(var1, var2, varN)
document.getElementById("checkboxId").checked;
toLowerCase()

31. To get the value or the currently selected item for lists
!==
document.getElementById("radioButtonId").checked;
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("listId").value;

32. To assign the return value of confirm() to a variable
indexOf(searchValue, startPosition)
confirm()
var variableName;
var answerVar = confirm("Message Text Here")

33. To code a button.onclick event handler
document.getElementById("radioButtonId").value;
getTime()
document.getElementById("ButtonId").onclick = functionName;
\

34. To view the current web address using JavaScript
document.getElementById("textAreaId").value;
r
document.getElementById("spanId").firstChild.nodeValue = "New Value";
window.location()

35. The string escape sequence to insert a carriage return in JavaScript
<script type="text/javascript">.....</script>
f
while (condition) {}
r

36. The identity operator for not equal
Math.max(var1, var2, varN)
!==
v
document.write("Text Here") //Remains on current line

37. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
t
string
getFullYear()
window.onload = function() {//actions here}

38. To create a single line comment in JavaScript
expression
Two forward slashes "//"
var arrayVar = new Array()
document.getElementById("radioButtonId").checked;

39. To display an alert
alert("Alert Text Here")
while (condition) {}
Src - e.g. <script src="fileName.js"> //
Math.round(number)

40. Math object method used to return a given number rounded to the next lowest integer value
toPrecision(precision)
Math.floor(number)
var arrayVar = new Array()
Two forward slashes "//"

41. The string escape sequence to start a new line in JavaScript
document.write("Text Here") //Remains on current line
n
Objects
toFixed(digits)

42. When you add a string and a number the result will be a ____
string
redeclare
toString(base)
Math.min(var1, var2, varN)

43. To code an If statement in JavaScript
if (condition) {}
f
!==
document.getElementById("ButtonId").onclick = functionName;

44. To assign a default value to a prompt
Use the second parameter. Example: prompt("Enter Age:", "18")
'
toUpperCase()
document.writeln("Text Here") //Advances to new line after text

45. The syntax of a conditional operator
document.getElementById("radioButtonId").checked;
event handler .
var variableName;
(Condition_Expression) ? Value_If_True : Value_If_False;

46. To get the current checked status of the control for checkboxes
document.getElementById("checkboxId").checked;
confirm("Message Text Here")
var functionName = function(param1, param2, paramN) {}
===

47. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
confirm()
<noscript>
Math.min(var1, var2, varN)
redeclare

48. To create a function that returns a value in JavaScript
Two forward slashes "//"
toExponential(digits)
var functionName = function(param1, param2, paramN) {}
Multi line

49. Math object method used to return a given number that has been rounded to the closes integer value
document.getElementById("textAreaId").value;
Math.round(number)
document.getElementById("listId").value;
substring(startIndex, stopIndex)

50. To set focus on the control for textboxes
Math.ceil(number)
\
prompt("Text Here")
document.getElementById("TextBoxId").focus;