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. String object method used to return the position of the first instance of a specified search string starting from the specified index
var stringVar = prompt("Text Here")
sensitive
document.getElementById("TextBoxId").value;
indexOf(searchValue, startPosition)

2. 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)
Math.round(number)
substring(startIndex)
Math.max(var1, var2, varN)

3. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
document.getElementById("listId").value;
Src - e.g. <script src="fileName.js"> //
charAt(position)
event handler .

4. What String object method returns a new string containing the value of the original string but in all upper case
charAt(position)
toUpperCase()
document.getElementById("TextBoxId").focus;
n

5. The four attributes of the <script> tag:Type - Src - _____ and Defer
Charset
var dateVar = new Date()
Two forward slashes "//"
document.writeln("Text Here") //Advances to new line after text

6. The string escape sequence to insert a backslash in JavaScript
===
\
alert("Alert Text Here")
document.getElementById("radioButtonId").checked;

7. Statements end in JavaScript with a ________
Two forward slashes "//"
semicolon ";"
charAt(position)
Src - e.g. <script src="fileName.js"> //

8. To access a page element by id
redeclare
document.getElementById(id)
toString()
t

9. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
window.onload = function() {//actions here}
expression
var answerVar = confirm("Message Text Here")

10. To create a new Date object
Math.round(number)
alert("Alert Text Here")
Math.floor(number)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

11. To set the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked = true; //Could also be false
var variableName;
Math.abs(number)
var functionName = function(param1, param2, paramN) {}

12. To get the current value of the control for a text area
var arrayVar = new Array()
document.getElementById("textAreaId").value;
\
document.write("Text Here") //Remains on current line

13. To create an Array object in JavaScript
var arrayVar = new Array()
toUpperCase()
focus
n

14. To create a single line comment in JavaScript
Two forward slashes "//"
document.getElementById("spanId").firstChild;
document.getElementById("checkboxId").checked;
var stringVar = "part 1:" + "part 2";

15. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
document.getElementById("checkboxId").checked;
setMilliseconds()
toUpperCase()
document.getElementById("radioButtonId").value;

16. To get the current value for textboxes
document.getElementById("TextBoxId").value;
var functionName = function(param1, param2, paramN) {}
for (counter; condition; incrementor) {}
Charset

17. To display an alert
Math.abs(number)
alert("Alert Text Here")
setMilliseconds()
var variableName;

18. To concatenate multiple parts into a string
Src - e.g. <script src="fileName.js"> //
var stringVar = "part 1:" + "part 2";
toPrecision(precision)
Multi line

19. A _______ variable can be changed and accessed from within and without a function or object.
global
Math.max(var1, var2, varN)
substring(startIndex)
var answerVar = confirm("Message Text Here")

20. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
Charset
ondblclick
document.write("Text Here") //Remains on current line
confirm("Message Text Here")

21. To write text to the current element of the DOM
Math.round(number)
expression
global
document.write("Text Here") //Remains on current line

22. The string escape sequence to insert a vertical tab in JavaScript
v
confirm()
document.getElementById("textAreaId").value = "Text Value";
window.location()

23. 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
substring(startIndex, stopIndex)
toPrecision(precision)
var stringVar = prompt("Text Here")
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

24. Math object method used to return the lowest value for a set of supplied numbers
\
'
string
Math.min(var1, var2, varN)

25. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
event handler .
Math.abs(number)
document.getElementById("listId").value;

26. To get the text value of the control for radio buttons
var arrayVar = new Array()
document.getElementById("radioButtonId").value;
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Charset

27. To make the browser load a new page using JavaScript
var answerVar = confirm("Message Text Here")
(Condition_Expression) ? Value_If_True : Value_If_False;
window.location = "New Web Address Here";
<script type="text/javascript">.....</script>

28. To assign actions to the window onLoad event
<script type="text/javascript">.....</script>
var stringVar = "part 1:" + "part 2";
window.onload = function() {//actions here}
for (counter; condition; incrementor) {}

29. Math object method used to return a given number raised to a given power
event handler .
(Condition_Expression) ? Value_If_True : Value_If_False;
toPrecision(precision)
Math.pow(number, power)

30. To get the value or the currently selected item for lists
Underscores
f
document.getElementById("listId").value;
Math.abs(number)

31. To set the digit precision of a decimal number
Number.NEGATIVE_INFINITY
toFixed(digitCount)
toFixed(digits)
toString(base)

32. To write a line to the current element of the DOM (Document Object Model)
document.writeln("Text Here") //Advances to new line after text
string
document.write("Text Here") //Remains on current line
Math.floor(number)

33. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
Objects
document.getElementById("TextBoxId").value;
var stringVar = prompt("Text Here")
charAt(position)

34. Date object method used to return a string containing the time
<noscript>
toTimeString()
toDateString()
document.getElementById("TextBoxId").disabled = true;

35. To view the current web address using JavaScript
<noscript>
document.getElementById("textAreaId").value = "Text Value";
window.location()
var arrayVar = new Array()

36. String object method used to get the character at a specified index position
charAt(position)
Two forward slashes "//"
confirm()
substring(startIndex)

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

38. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
toFixed(digits)
document.getElementById("TextBoxId").disabled = true;
toPrecision(precision)

39. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
toPrecision(precision)
confirm("Message Text Here")
Number.NEGATIVE_INFINITY
Src - e.g. <script src="fileName.js"> //

40. JavaScript is case _______
sensitive
setMilliseconds()
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Math.floor(number)

41. Math object method used to return the highest value from a set of supplied numbers
toLowerCase()
Math.max(var1, var2, varN)
document.getElementById("radioButtonId").checked;
prompt("Text Here")

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

43. The string escape sequence to start a new line in JavaScript
var dateObject = new Date("11/22/2012 18:25:35")
n
Src - e.g. <script src="fileName.js"> //
Math.max(var1, var2, varN)

44. The format to create a new Date object from a string
Math.ceil(number)
var functionName = function(param1, param2, paramN) {}
alert("Alert Text Here")
var dateObject = new Date("11/22/2012 18:25:35")

45. The string escape sequence to insert a double quote in JavaScript
"
Math.ceil(number)
document.getElementById("radioButtonId").value;
standard equality operators

46. A statement that yields a value
v
expression
document.getElementById("radioButtonId").checked = true; //Could also be false
redeclare

47. To denote a string in JavaScript
sensitive
document.getElementById("textAreaId").value;
Either single or double quotes surrounding the data
document.getElementById("CheckboxId").checked = true; //Could also be false

48. To code an If statement in JavaScript
var functionName = function(param1, param2, paramN) {}
if (condition) {}
toString(base)
Math.random() //Returns a value >= 0.0 but <1.0

49. The syntax of a conditional operator
var functionName = function(param1, param2, paramN) {}
toFixed(digitCount)
if (condition) {}
(Condition_Expression) ? Value_If_True : Value_If_False;

50. To get the text value of the control for radio buttons
window.onload = function() {//actions here}
document.getElementById("checkboxId").value;
focus
charAt(position)