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. Math object method used to return the absolute value of a given number
Math.abs(number)
event handler .
toString(base)
toExponential(digits)

2. A _______ variable can be changed and accessed from within and without a function or object.
global
v
t
if (condition) {}

3. To write a line to the current element of the DOM (Document Object Model)
document.writeln("Text Here") //Advances to new line after text
Math.floor(number)
expression
document.getElementById("textAreaId").value = "Text Value";

4. To code a while statement in JavaScript
var stringVar = prompt("Text Here")
while (condition) {}
window.onload = function() {//actions here}
focus

5. 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

6. What String object method returns a new string containing the value of the original string but in all lower case
var answerVar = confirm("Message Text Here")
toLowerCase()
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.abs(number)

7. The four attributes of the <script> tag:Type - Src - _____ and Defer
Math.random() //Returns a value >= 0.0 but <1.0
'
document.getElementById("listId").value;
Charset

8. Date object method used to return a string containing the date
document.getElementById("radioButtonId").value;
toString()
toDateString()
===

9. The identity operator for equals
var stringVar = "part 1:" + "part 2";
window.onload = function() {//actions here}
===
\

10. The escape sequence used to insert a Unicode character into a string in JavaScript
getFullYear()
document.getElementById("CheckboxId").checked = true; //Could also be false
udddd
document.getElementById("TextBoxId").focus;

11. When you add a string and a number the result will be a ____
global
string
Number.NEGATIVE_INFINITY
confirm()

12. Math object method used to return a given number rounded to the next lowest integer value
var variableName;
Math.floor(number)
string
var dateObject = new Date("11/22/2012 18:25:35")

13. ________ comments start with / and end with /.
Multi line
"
document.getElementById("TextBoxId").focus;
Objects

14. To access a page element by id
substring(startIndex, stopIndex)
document.getElementById(id)
isNaN(varHere) //Returns true or false.
event handler .

15. To denote a string in JavaScript
document.getElementById("checkboxId").value;
udddd
document.getElementById(id)
Either single or double quotes surrounding the data

16. String object method used to concatenate multiple strings
substring(startIndex, stopIndex)
alert("Alert Text Here")
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
concat(var1, var2, varN)

17. Date object method used to return a string containing the date and time
document.writeln("Text Here") //Advances to new line after text
var dateObject = new Date("11/22/2012 18:25:35")
toString()
if (condition) {}

18. A statement that yields a value
Math.floor(number)
document.write("Text Here") //Remains on current line
expression
string

19. Unlike ________________ identity operators do not perform type coercion.
event handler .
standard equality operators
var functionName = function(param1, param2, paramN) {}
Multi line

20. The _____ attribute is used to denote external file for script use
while (condition) {}
document.write("Text Here") //Remains on current line
window.location = "New Web Address Here";
Src - e.g. <script src="fileName.js"> //

21. To concatenate multiple parts into a string
var answerVar = confirm("Message Text Here")
var stringVar = "part 1:" + "part 2";
toUpperCase()
"

22. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
substring(startIndex)
f
document.getElementById(id)

23. The string escape sequence to insert a backslash in JavaScript
window.location = "New Web Address Here";
\
string
udddd

24. To code a button.onclick event handler
toString()
indexOf(searchValue, startPosition)
r
document.getElementById("ButtonId").onclick = functionName;

25. What Date object method is used to return the number of milliseconds since the start of GMT
Number.NEGATIVE_INFINITY
getTime()
r
toString()

26. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
toDateString()
Two forward slashes "//"
alert("Alert Text Here")

27. The format to create a new Date object from a string
var stringVar = prompt("Text Here")
v
global
var dateObject = new Date("11/22/2012 18:25:35")

28. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
setMilliseconds()
document.getElementById(id)
document.getElementById("radioButtonId").value;
toString(base)

29. To create a new Date object
document.getElementById("TextBoxId").value;
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
window.onload = function() {//actions here}
var dateObject = new Date("11/22/2012 18:25:35")

30. What String object method returns a new string containing the value of the original string but in all upper case
!==
toUpperCase()
Objects
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

31. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
document.getElementById(id)
f
while (condition) {}
focus

32. JavaScript is case _______
string
document.getElementById("TextBoxId").focus;
sensitive
toExponential(digits)

33. To get the text value of the control for radio buttons
document.getElementById("ButtonId").onclick = functionName;
document.getElementById("radioButtonId").value;
n
document.getElementById("spanId").firstChild.nodeValue = "New Value";

34. The string escape sequence to insert a form feed in JavaScript
setMilliseconds()
for (counter; condition; incrementor) {}
'
f

35. To assign a default value to a prompt
Use the second parameter. Example: prompt("Enter Age:", "18")
setMilliseconds()
Math.min(var1, var2, varN)
var dateVar = new Date()

36. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
document.getElementById("textAreaId").value = "Text Value";
Math.min(var1, var2, varN)
var answerVar = confirm("Message Text Here")
Underscores

37. The string escape sequence to insert a carriage return in JavaScript
var functionName = function(param1, param2, paramN) {}
document.getElementById("radioButtonId").checked;
document.getElementById("radioButtonId").value;
r

38. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
document.getElementById("textAreaId").value = "Text Value";
udddd
Src - e.g. <script src="fileName.js"> //
Number.NEGATIVE_INFINITY

39. To set the current checked status of the control for checkboxes
document.getElementById("CheckboxId").checked = true; //Could also be false
var stringVar = "part 1:" + "part 2";
"
document.getElementById("checkboxId").value;

40. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Math.max(var1, var2, varN)
Number.NEGATIVE_INFINITY
alert("Alert Text Here")
getFullYear()

41. When you __________ a javascript variable it retains its original value
toUpperCase()
redeclare
setMilliseconds()
<script type="text/javascript">.....</script>

42. To set the current checked status of the control for radio buttons
document.getElementById("checkboxId").value;
document.getElementById("radioButtonId").checked = true; //Could also be false
toFixed(digitCount)
Use the second parameter. Example: prompt("Enter Age:", "18")

43. The string escape sequence to start a new line in JavaScript
Multi line
n
"
toDateString()

44. 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
semicolon ";"
global
substring(startIndex, stopIndex)
window.onload = function() {//actions here}

45. To display a confirmation
confirm("Message Text Here")
document.getElementById("listId").value;
charAt(position)
var answerVar = confirm("Message Text Here")

46. Statements end in JavaScript with a ________
Objects
semicolon ";"
getTime()
confirm()

47. To get the value or the currently selected item for lists
Math.ceil(number)
var dateVar = new Date()
document.getElementById("listId").value;
toUpperCase()

48. Math object method used to return a given number that has been rounded to the closes integer value
substring(startIndex)
document.getElementById("radioButtonId").checked;
Math.round(number)
v

49. To create an Array object in JavaScript
var arrayVar = new Array()
t
(Condition_Expression) ? Value_If_True : Value_If_False;
Math.pow(number, power)

50. Math object method used to return a given number rounded to the next highest integer value
Math.ceil(number)
sensitive
Objects
expression