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

2. String object method used to get the character at a specified index position
charAt(position)
toTimeString()
for (counter; condition; incrementor) {}
while (condition) {}

3. To code a for statement in JavaScript
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
for (counter; condition; incrementor) {}
Two forward slashes "//"
document.getElementById("listId").value;

4. To get the text value of the control for radio buttons
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("CheckboxId").checked = true; //Could also be false
document.getElementById("checkboxId").value;
getFullYear()

5. To declare a variable in JavaScript
for (counter; condition; incrementor) {}
Src - e.g. <script src="fileName.js"> //
var variableName;
Math.min(var1, var2, varN)

6. The string escape sequence to insert a vertical tab in JavaScript
document.getElementById("textAreaId").value;
<noscript>
toString()
v

7. To denote a string in JavaScript
f
Either single or double quotes surrounding the data
toTimeString()
indexOf(searchValue, startPosition)

8. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
v
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Number.NEGATIVE_INFINITY
t

9. To access the text element in a <span> tag
var functionName = function(param1, param2, paramN) {}
<script type="text/javascript">.....</script>
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
document.getElementById("spanId").firstChild;

10. The identity operator for not equal
v
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.pow(number, power)
!==

11. To make the browser load a new page using JavaScript
window.location = "New Web Address Here";
document.getElementById("TextBoxId").value;
substring(startIndex, stopIndex)
toFixed(digits)

12. String object method used to concatenate multiple strings
Math.ceil(number)
concat(var1, var2, varN)
window.onload = function() {//actions here}
toString(base)

13. The identity operator for equals
document.getElementById("checkboxId").value;
===
Math.pow(number, power)
var dateVar = new Date()

14. Math object method used to return a given number that has been rounded to the closes integer value
var stringVar = prompt("Text Here")
!==
Math.round(number)
var arrayVar = new Array()

15. 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
document.getElementById("radioButtonId").value;
substring(startIndex, stopIndex)
Math.sqrt(number)
focus

16. Math object method used to return the absolute value of a given number
toUpperCase()
Math.abs(number)
"
toFixed(digitCount)

17. Date object method used to return a string containing the time
document.write("Text Here") //Remains on current line
document.getElementById("TextBoxId").focus;
v
toTimeString()

18. To insert Javascript into a web page
ondblclick
prompt("Text Here")
<script type="text/javascript">.....</script>
semicolon ";"

19. To create an Array object in JavaScript
Use the second parameter. Example: prompt("Enter Age:", "18")
var arrayVar = new Array()
document.getElementById("spanId").firstChild.nodeValue = "New Value";
!==

20. The four attributes of the <script> tag:Type - Src - _____ and Defer
Charset
document.getElementById("radioButtonId").checked = true; //Could also be false
v
toDateString()

21. The string escape sequence to insert a double quote in JavaScript
while (condition) {}
"
Math.random() //Returns a value >= 0.0 but <1.0
toLowerCase()

22. To assign a default value to a prompt
Number.NEGATIVE_INFINITY
var stringVar = "part 1:" + "part 2";
Use the second parameter. Example: prompt("Enter Age:", "18")
toFixed(digits)

23. A _______ variable can be changed and accessed from within and without a function or object.
f
getTime()
for (counter; condition; incrementor) {}
global

24. A statement that yields a value
<noscript>
Math.min(var1, var2, varN)
Use the second parameter. Example: prompt("Enter Age:", "18")
expression

25. Date object method used to return a string containing the date and time
Underscores
toString()
Math.round(number)
"

26. Math object method used to return a given number rounded to the next highest integer value
getTime()
Math.ceil(number)
toDateString()
toString()

27. To display an alert
alert("Alert Text Here")
document.getElementById("TextBoxId").disabled = true;
sensitive
indexOf(searchValue, startPosition)

28. To create a new Date object
f
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
sensitive
document.getElementById("checkboxId").value;

29. To get the current value of the control for a text area
document.getElementById("textAreaId").value;
document.write("Text Here") //Remains on current line
document.getElementById(id)
Number.NEGATIVE_INFINITY

30. The format to create a new Date object from a string
for (counter; condition; incrementor) {}
var dateObject = new Date("11/22/2012 18:25:35")
redeclare
document.getElementById(id)

31. Command to display a prompt
prompt("Text Here")
n
document.getElementById("radioButtonId").checked;
Use the second parameter. Example: prompt("Enter Age:", "18")

32. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
var functionName = function(param1, param2, paramN) {}
<noscript>
toDateString()
if (condition) {}

33. To view the current web address using JavaScript
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
f
var variableName;
window.location()

34. To set the current checked status of the control for radio buttons
f
document.getElementById("radioButtonId").checked = true; //Could also be false
Math.ceil(number)
<script type="text/javascript">.....</script>

35. String object method used to return a new string that contains part of the original string from the specified start position
document.write("Text Here") //Remains on current line
document.getElementById("radioButtonId").checked = true; //Could also be false
substring(startIndex)
Math.random() //Returns a value >= 0.0 but <1.0

36. The string escape sequence to insert a form feed in JavaScript
f
Multi line
Use the second parameter. Example: prompt("Enter Age:", "18")
<noscript>

37. Number object method used to return a numerical string with the specified number of significant digits
!==
while (condition) {}
toPrecision(precision)
\

38. To code a while statement in JavaScript
"
while (condition) {}
event handler .
Use the second parameter. Example: prompt("Enter Age:", "18")

39. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Math.max(var1, var2, varN)
ondblclick
getFullYear()
Math.random() //Returns a value >= 0.0 but <1.0

40. The _____ attribute is used to denote external file for script use
semicolon ";"
toTimeString()
Src - e.g. <script src="fileName.js"> //
window.location()

41. Number object method used to return a number in exponential format with the specified number of decimal places
document.getElementById("TextBoxId").value;
toExponential(digits)
substring(startIndex, stopIndex)
toPrecision(precision)

42. To get the text value of the control for radio buttons
global
var stringVar = prompt("Text Here")
document.getElementById("radioButtonId").value;
var answerVar = confirm("Message Text Here")

43. Math object method used to return the square root of a given number
document.writeln("Text Here") //Advances to new line after text
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("TextBoxId").disabled = true;
Math.sqrt(number)

44. To get the current checked status of the control for radio buttons
semicolon ";"
expression
window.onload = function() {//actions here}
document.getElementById("radioButtonId").checked;

45. The string escape sequence to start a new line in JavaScript
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
n
var functionName = function(param1, param2, paramN) {}
var dateVar = new Date()

46. What Date object method is used to return the number of milliseconds since the start of GMT
document.getElementById("CheckboxId").checked = true; //Could also be false
var answerVar = confirm("Message Text Here")
getTime()
Math.abs(number)

47. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
var arrayVar = new Array()
setMilliseconds()
v
var variableName;

48. To access a page element by id
document.writeln("Text Here") //Advances to new line after text
Charset
document.getElementById("checkboxId").value;
document.getElementById(id)

49. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
confirm("Message Text Here")
Objects
semicolon ";"
Math.random() //Returns a value >= 0.0 but <1.0

50. Math object method used to return the highest value from a set of supplied numbers
document.getElementById(id)
Math.max(var1, var2, varN)
string
semicolon ";"