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. To create a single line comment in JavaScript
toDateString()
for (counter; condition; incrementor) {}
document.getElementById("radioButtonId").value;
Two forward slashes "//"

2. The string escape sequence to insert a backslash in JavaScript
'
\
document.getElementById("radioButtonId").value;
toFixed(digits)

3. The string escape sequence to start a new line in JavaScript
'
!==
semicolon ";"
n

4. To get the current value for textboxes
charAt(position)
window.location = "New Web Address Here";
semicolon ";"
document.getElementById("TextBoxId").value;

5. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
'
event handler .
getFullYear()
Objects

6. To set focus on the control for textboxes
string
document.getElementById("radioButtonId").value;
document.getElementById("TextBoxId").focus;
f

7. To create a function in JavaScript
var functionName = function(param1, param2, paramN) {}
window.location = "New Web Address Here";
document.getElementById("TextBoxId").disabled = true;
getFullYear()

8. This returns only True or false values
toFixed(digitCount)
Math.ceil(number)
confirm()
Math.max(var1, var2, varN)

9. Math object method used to return the square root of a given number
toFixed(digitCount)
Math.sqrt(number)
"
document.getElementById("radioButtonId").value;

10. To create an Array object in JavaScript
toUpperCase()
var arrayVar = new Array()
document.getElementById("spanId").firstChild.nodeValue = "New Value";
while (condition) {}

11. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Number.NEGATIVE_INFINITY
for (counter; condition; incrementor) {}
expression
"

12. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
document.write("Text Here") //Remains on current line
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
event handler .
document.getElementById("TextBoxId").disabled = true;

13. To code a button.onclick event handler
redeclare
document.getElementById("ButtonId").onclick = functionName;
Either single or double quotes surrounding the data
toUpperCase()

14. To get the text value of the control for radio buttons
ondblclick
toFixed(digits)
document.getElementById("checkboxId").value;
charAt(position)

15. Number object method used to round numbers to the specified number of decimal places
toFixed(digits)
Multi line
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toExponential(digits)

16. To assign the return value of confirm() to a variable
Math.pow(number, power)
var answerVar = confirm("Message Text Here")
focus
===

17. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
\
confirm("Message Text Here")
event handler .
focus

18. The string escape sequence to insert a vertical tab in JavaScript
f
var arrayVar = new Array()
v
Either single or double quotes surrounding the data

19. To get the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked;
toString(base)
toTimeString()
alert("Alert Text Here")

20. To assign actions to the window onLoad event
window.onload = function() {//actions here}
redeclare
!==
Math.min(var1, var2, varN)

21. To get the current checked status of the control for checkboxes
Underscores
document.writeln("Text Here") //Advances to new line after text
toLowerCase()
document.getElementById("checkboxId").checked;

22. What Date object method is used to return the number of milliseconds since the start of GMT
toLowerCase()
getTime()
document.getElementById("checkboxId").value;
"

23. The format to create a new Date object from a string
var dateObject = new Date("11/22/2012 18:25:35")
Src - e.g. <script src="fileName.js"> //
confirm()
document.getElementById("checkboxId").value;

24. Math object method used to return the lowest value for a set of supplied numbers
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Charset
Use the second parameter. Example: prompt("Enter Age:", "18")
Math.min(var1, var2, varN)

25. The string escape sequence to insert a tab in JavaScript
document.getElementById("spanId").firstChild.nodeValue = "New Value";
string
var variableName;
t

26. To write a line to the current element of the DOM (Document Object Model)
document.getElementById("radioButtonId").checked = true; //Could also be false
toString(base)
Math.sqrt(number)
document.writeln("Text Here") //Advances to new line after text

27. To test that a variable contains a valid number
n
Math.pow(number, power)
var variableName;
isNaN(varHere) //Returns true or false.

28. To set the digit precision of a decimal number
toFixed(digitCount)
alert("Alert Text Here")
Objects
toUpperCase()

29. To get the text value of the control for radio buttons
toString()
toUpperCase()
document.getElementById("radioButtonId").value;
standard equality operators

30. To concatenate multiple parts into a string
semicolon ";"
document.writeln("Text Here") //Advances to new line after text
if (condition) {}
var stringVar = "part 1:" + "part 2";

31. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
Objects
window.location = "New Web Address Here";
charAt(position)

32. String object method used to return the position of the first instance of a specified search string starting from the specified index
window.onload = function() {//actions here}
indexOf(searchValue, startPosition)
n
document.getElementById("textAreaId").value;

33. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
Src - e.g. <script src="fileName.js"> //
ondblclick
var variableName;
document.getElementById("CheckboxId").checked = true; //Could also be false

34. To display a confirmation
toExponential(digits)
indexOf(searchValue, startPosition)
confirm("Message Text Here")
toString()

35. To set the current checked status of the control for radio buttons
toUpperCase()
expression
var variableName;
document.getElementById("radioButtonId").checked = true; //Could also be false

36. To assign the value from a prompt to a non-string variable
while (condition) {}
if (condition) {}
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Number.NEGATIVE_INFINITY

37. The string escape sequence to insert a double quote in JavaScript
"
n
Two forward slashes "//"
Math.random() //Returns a value >= 0.0 but <1.0

38. To make the browser load a new page using JavaScript
Use the second parameter. Example: prompt("Enter Age:", "18")
window.location = "New Web Address Here";
Math.ceil(number)
r

39. String object method used to concatenate multiple strings
document.getElementById("radioButtonId").checked = true; //Could also be false
concat(var1, var2, varN)
document.getElementById("radioButtonId").checked;
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

40. 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

41. To assign the value from a prompt to a string
sensitive
for (counter; condition; incrementor) {}
var stringVar = prompt("Text Here")
if (condition) {}

42. To code a for statement in JavaScript
for (counter; condition; incrementor) {}
f
!==
Math.floor(number)

43. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
getFullYear()
Math.ceil(number)
\
prompt("Text Here")

44. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Underscores
window.onload = function() {//actions here}
substring(startIndex)
expression

45. To create a function that returns a value in JavaScript
Math.max(var1, var2, varN)
setMilliseconds()
document.getElementById("CheckboxId").checked = true; //Could also be false
var functionName = function(param1, param2, paramN) {}

46. To access the text element in a <span> tag
document.getElementById("TextBoxId").disabled = true;
prompt("Text Here")
Use the second parameter. Example: prompt("Enter Age:", "18")
document.getElementById("spanId").firstChild;

47. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
global
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("TextBoxId").value;

48. To create a Date object in JavaScript
document.write("Text Here") //Remains on current line
n
document.getElementById("ButtonId").onclick = functionName;
var dateVar = new Date()

49. Math object method used to return the absolute value of a given number
if (condition) {}
Math.abs(number)
toString(base)
getTime()

50. To assign a default value to a prompt
Use the second parameter. Example: prompt("Enter Age:", "18")
document.getElementById(id)
ondblclick
Two forward slashes "//"