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 a given number rounded to the next lowest integer value
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.max(var1, var2, varN)
toString()
Math.floor(number)

2. Math object method used to return the absolute value of a given number
document.getElementById("spanId").firstChild;
document.getElementById("CheckboxId").checked = true; //Could also be false
udddd
Math.abs(number)

3. The identity operator for equals
<script type="text/javascript">.....</script>
toFixed(digitCount)
var arrayVar = new Array()
===

4. To create an Array object in JavaScript
n
Math.abs(number)
var arrayVar = new Array()
Math.random() //Returns a value >= 0.0 but <1.0

5. The format to create a new Date object from a string
getTime()
window.onload = function() {//actions here}
document.getElementById("radioButtonId").checked;
var dateObject = new Date("11/22/2012 18:25:35")

6. JavaScript is case _______
sensitive
Two forward slashes "//"
toFixed(digitCount)
Src - e.g. <script src="fileName.js"> //

7. The string escape sequence to insert a double quote in JavaScript
var stringVar = prompt("Text Here")
window.location()
Number.NEGATIVE_INFINITY
"

8. To set the current checked status of the control for radio buttons
document.write("Text Here") //Remains on current line
===
toFixed(digits)
document.getElementById("radioButtonId").checked = true; //Could also be false

9. To create a function that returns a value in JavaScript
Either single or double quotes surrounding the data
var functionName = function(param1, param2, paramN) {}
Math.max(var1, var2, varN)
Multi line

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

11. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Objects
Math.sqrt(number)
Use the second parameter. Example: prompt("Enter Age:", "18")

12. Math object method used to return a random number
toPrecision(precision)
Charset
toExponential(digits)
Math.random() //Returns a value >= 0.0 but <1.0

13. What String object method returns a new string containing the value of the original string but in all lower case
redeclare
semicolon ";"
toLowerCase()
document.getElementById("spanId").firstChild.nodeValue = "New Value";

14. To assign the return value of confirm() to a variable
Math.min(var1, var2, varN)
while (condition) {}
var answerVar = confirm("Message Text Here")
toPrecision(precision)

15. To access a page element by id
Underscores
var answerVar = confirm("Message Text Here")
document.getElementById(id)
getFullYear()

16. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
standard equality operators
document.getElementById("spanId").firstChild;
toDateString()
setMilliseconds()

17. This returns only True or false values
confirm()
global
\
toExponential(digits)

18. To get the current value of the control for a text area
t
var stringVar = prompt("Text Here")
document.getElementById("textAreaId").value;
isNaN(varHere) //Returns true or false.

19. Unlike ________________ identity operators do not perform type coercion.
standard equality operators
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toPrecision(precision)
toUpperCase()

20. To get the current checked status of the control for radio buttons
prompt("Text Here")
getTime()
document.getElementById("radioButtonId").checked;
standard equality operators

21. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
Charset
toLowerCase()
prompt("Text Here")
<noscript>

22. A _______ variable can be changed and accessed from within and without a function or object.
substring(startIndex)
'
global
Math.pow(number, power)

23. Number object method used to round numbers to the specified number of decimal places
document.getElementById("spanId").firstChild;
toFixed(digits)
===
string

24. To code a button.onclick event handler
window.location = "New Web Address Here";
document.getElementById("ButtonId").onclick = functionName;
toExponential(digits)
Math.random() //Returns a value >= 0.0 but <1.0

25. To assign actions to the window onLoad event
toTimeString()
document.writeln("Text Here") //Advances to new line after text
getFullYear()
window.onload = function() {//actions here}

26. The string escape sequence to start a new line in JavaScript
confirm("Message Text Here")
document.getElementById("radioButtonId").checked;
toFixed(digitCount)
n

27. String object method used to return the position of the first instance of a specified search string starting from the specified index
indexOf(searchValue, startPosition)
document.getElementById("radioButtonId").value;
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.sqrt(number)

28. ________ comments start with / and end with /.
Multi line
toFixed(digitCount)
document.getElementById("textAreaId").value;
document.getElementById("spanId").firstChild;

29. To assign the value from a prompt to a string
var stringVar = prompt("Text Here")
v
global
Math.floor(number)

30. The string escape sequence to insert a carriage return in JavaScript
var variableName;
window.onload = function() {//actions here}
document.getElementById("textAreaId").value = "Text Value";
r

31. To assign a default value to a prompt
substring(startIndex)
Use the second parameter. Example: prompt("Enter Age:", "18")
document.getElementById("TextBoxId").value;
var dateVar = new Date()

32. To code a while statement in JavaScript
getTime()
while (condition) {}
document.getElementById("ButtonId").onclick = functionName;
confirm("Message Text Here")

33. To get the text value of the control for radio buttons
document.getElementById("radioButtonId").value;
standard equality operators
Math.min(var1, var2, varN)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

34. Math object method used to return the highest value from a set of supplied numbers
document.getElementById("checkboxId").checked;
Math.max(var1, var2, varN)
var dateVar = new Date()
Either single or double quotes surrounding the data

35. The string escape sequence to insert a single quote in JavaScript

36. To create a new Date object
Use the second parameter. Example: prompt("Enter Age:", "18")
toString(base)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
global

37. To code a for statement in JavaScript
<script type="text/javascript">.....</script>
toFixed(digits)
for (counter; condition; incrementor) {}
Math.sqrt(number)

38. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Multi line
for (counter; condition; incrementor) {}
getFullYear()
confirm("Message Text Here")

39. To code an If statement in JavaScript
getTime()
document.getElementById("TextBoxId").focus;
f
if (condition) {}

40. To declare a variable in JavaScript
var variableName;
ondblclick
udddd
while (condition) {}

41. String object method used to get the character at a specified index position
toString(base)
toUpperCase()
r
charAt(position)

42. To alter the value of the text element in a span tag
getTime()
ondblclick
alert("Alert Text Here")
document.getElementById("spanId").firstChild.nodeValue = "New Value";

43. To write text to the current element of the DOM
window.location()
Underscores
document.getElementById("checkboxId").checked;
document.write("Text Here") //Remains on current line

44. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Number.NEGATIVE_INFINITY
redeclare
if (condition) {}
Multi line

45. To create a Date object in JavaScript
var dateVar = new Date()
document.getElementById("radioButtonId").checked = true; //Could also be false
setMilliseconds()
Math.round(number)

46. Number object method used to return a string with a given number base
var stringVar = "part 1:" + "part 2";
toString(base)
Math.random() //Returns a value >= 0.0 but <1.0
toTimeString()

47. To create a single line comment in JavaScript
Src - e.g. <script src="fileName.js"> //
Two forward slashes "//"
Math.abs(number)
while (condition) {}

48. To get the current value for textboxes
document.getElementById("checkboxId").checked;
for (counter; condition; incrementor) {}
toTimeString()
document.getElementById("TextBoxId").value;

49. Date object method used to return a string containing the date and time
prompt("Text Here")
var arrayVar = new Array()
toString()
for (counter; condition; incrementor) {}

50. To display a confirmation
setMilliseconds()
if (condition) {}
confirm("Message Text Here")
substring(startIndex)