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. Number object method used to return a string with a given number base
document.getElementById("radioButtonId").checked;
udddd
toString(base)
Math.abs(number)

2. Date object method used to return a string containing the date
var variableName;
toDateString()
for (counter; condition; incrementor) {}
charAt(position)

3. To set the digit precision of a decimal number
semicolon ";"
window.onload = function() {//actions here}
var functionName = function(param1, param2, paramN) {}
toFixed(digitCount)

4. String object method used to return a new string that contains part of the original string from the specified start position
concat(var1, var2, varN)
substring(startIndex)
!==
Math.sqrt(number)

5. To get the current checked status of the control for radio buttons
document.getElementById(id)
toString(base)
document.getElementById("radioButtonId").checked;
concat(var1, var2, varN)

6. To concatenate multiple parts into a string
toLowerCase()
Either single or double quotes surrounding the data
document.getElementById("CheckboxId").checked = true; //Could also be false
var stringVar = "part 1:" + "part 2";

7. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
(Condition_Expression) ? Value_If_True : Value_If_False;
event handler .
var functionName = function(param1, param2, paramN) {}
redeclare

8. To make the browser load a new page using JavaScript
window.location = "New Web Address Here";
window.onload = function() {//actions here}
Math.max(var1, var2, varN)
document.getElementById("TextBoxId").value;

9. Math object method used to return a given number rounded to the next lowest integer value
Math.pow(number, power)
Math.floor(number)
udddd
t

10. Number object method used to round numbers to the specified number of decimal places
toFixed(digits)
var answerVar = confirm("Message Text Here")
semicolon ";"
var functionName = function(param1, param2, paramN) {}

11. To code a for statement in JavaScript
toExponential(digits)
Charset
for (counter; condition; incrementor) {}
prompt("Text Here")

12. To get the text value of the control for radio buttons
focus
getFullYear()
r
document.getElementById("checkboxId").value;

13. The format to create a new Date object from a string
t
<script type="text/javascript">.....</script>
var dateObject = new Date("11/22/2012 18:25:35")
var arrayVar = new Array()

14. To get the value or the currently selected item for lists
document.getElementById("radioButtonId").value;
!==
<noscript>
document.getElementById("listId").value;

15. ________ comments start with / and end with /.
toPrecision(precision)
document.getElementById("radioButtonId").checked = true; //Could also be false
Use the second parameter. Example: prompt("Enter Age:", "18")
Multi line

16. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
concat(var1, var2, varN)
<noscript>
Math.sqrt(number)
confirm("Message Text Here")

17. To assign actions to the window onLoad event
document.getElementById("textAreaId").value;
toExponential(digits)
getFullYear()
window.onload = function() {//actions here}

18. To create a Date object in JavaScript
isNaN(varHere) //Returns true or false.
if (condition) {}
var dateVar = new Date()
window.location()

19. To code a while statement in JavaScript
event handler .
document.getElementById("spanId").firstChild;
n
while (condition) {}

20. 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

21. To create a function that returns a value in JavaScript
var functionName = function(param1, param2, paramN) {}
focus
setMilliseconds()
Use the second parameter. Example: prompt("Enter Age:", "18")

22. To create a function in JavaScript
Charset
charAt(position)
var functionName = function(param1, param2, paramN) {}
document.getElementById("textAreaId").value;

23. Unlike ________________ identity operators do not perform type coercion.
r
var dateObject = new Date("11/22/2012 18:25:35")
toExponential(digits)
standard equality operators

24. To get the current value of the control for a text area
document.getElementById("textAreaId").value;
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
udddd
window.location = "New Web Address Here";

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

26. Date object method used to return a string containing the time
Either single or double quotes surrounding the data
toTimeString()
toFixed(digits)
t

27. To assign the value from a prompt to a string
toTimeString()
var stringVar = prompt("Text Here")
t
alert("Alert Text Here")

28. Statements end in JavaScript with a ________
semicolon ";"
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.random() //Returns a value >= 0.0 but <1.0
Math.max(var1, var2, varN)

29. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
setMilliseconds()
Multi line
Math.floor(number)
getFullYear()

30. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
toFixed(digits)
toString(base)
event handler .

31. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
semicolon ";"
getTime()
ondblclick
global

32. To assign the value from a prompt to a non-string variable
confirm("Message Text Here")
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Charset
for (counter; condition; incrementor) {}

33. Math object method used to return a given number raised to a given power
var functionName = function(param1, param2, paramN) {}
Math.pow(number, power)
'
r

34. String object method used to concatenate multiple strings
window.onload = function() {//actions here}
document.getElementById("checkboxId").value;
concat(var1, var2, varN)
Either single or double quotes surrounding the data

35. The string escape sequence to insert a form feed in JavaScript
f
document.getElementById("TextBoxId").disabled = true;
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
charAt(position)

36. To access a page element by id
document.getElementById(id)
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("checkboxId").checked;
redeclare

37. When you __________ a javascript variable it retains its original value
redeclare
window.location()
(Condition_Expression) ? Value_If_True : Value_If_False;
isNaN(varHere) //Returns true or false.

38. To get the text value of the control for radio buttons
\
Either single or double quotes surrounding the data
document.getElementById("radioButtonId").value;
!==

39. Math object method used to return the absolute value of a given number
Math.abs(number)
global
expression
t

40. A _______ variable can be changed and accessed from within and without a function or object.
toExponential(digits)
global
isNaN(varHere) //Returns true or false.
document.getElementById("radioButtonId").checked;

41. To alter the value of the text element in a span tag
redeclare
var functionName = function(param1, param2, paramN) {}
document.getElementById("spanId").firstChild.nodeValue = "New Value";
concat(var1, var2, varN)

42. This returns only True or false values
expression
toFixed(digitCount)
Number.NEGATIVE_INFINITY
confirm()

43. Math object method used to return a random number
document.getElementById(id)
Math.random() //Returns a value >= 0.0 but <1.0
prompt("Text Here")
Math.abs(number)

44. The identity operator for equals
Multi line
===
semicolon ";"
var stringVar = "part 1:" + "part 2";

45. To get the current checked status of the control for checkboxes
document.getElementById("checkboxId").checked;
indexOf(searchValue, startPosition)
toExponential(digits)
charAt(position)

46. To assign the return value of confirm() to a variable
var answerVar = confirm("Message Text Here")
toPrecision(precision)
document.getElementById("textAreaId").value = "Text Value";
v

47. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
var dateObject = new Date("11/22/2012 18:25:35")
Number.NEGATIVE_INFINITY
var functionName = function(param1, param2, paramN) {}
setMilliseconds()

48. The _____ attribute is used to denote external file for script use
Src - e.g. <script src="fileName.js"> //
document.getElementById("radioButtonId").checked;
!==
(Condition_Expression) ? Value_If_True : Value_If_False;

49. To set the current checked status of the control for checkboxes
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.abs(number)
document.getElementById("textAreaId").value = "Text Value";
confirm()

50. The string escape sequence to start a new line in JavaScript
n
Number.NEGATIVE_INFINITY
Either single or double quotes surrounding the data
concat(var1, var2, varN)