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 numerical string with the specified number of significant digits
global
toTimeString()
var functionName = function(param1, param2, paramN) {}
toPrecision(precision)

2. To get the text value of the control for radio buttons
for (counter; condition; incrementor) {}
toString()
document.getElementById("checkboxId").value;
Math.floor(number)

3. Math object method used to return a given number raised to a given power
"
document.getElementById("radioButtonId").checked;
Math.pow(number, power)
document.getElementById("TextBoxId").disabled = true;

4. To create a function in JavaScript
document.getElementById("TextBoxId").disabled = true;
toLowerCase()
toString()
var functionName = function(param1, param2, paramN) {}

5. The string escape sequence to insert a double quote in JavaScript
"
r
Math.round(number)
Math.ceil(number)

6. Date object method used to return a string containing the date and time
toLowerCase()
toString()
document.getElementById(id)
document.getElementById("CheckboxId").checked = true; //Could also be false

7. This returns only True or false values
document.write("Text Here") //Remains on current line
confirm()
document.getElementById("spanId").firstChild;
standard equality operators

8. The _____ attribute is used to denote external file for script use
window.location = "New Web Address Here";
var functionName = function(param1, param2, paramN) {}
Src - e.g. <script src="fileName.js"> //
toUpperCase()

9. ________ comments start with / and end with /.
document.getElementById("textAreaId").value = "Text Value";
Multi line
isNaN(varHere) //Returns true or false.
toFixed(digitCount)

10. To write a line to the current element of the DOM (Document Object Model)
document.getElementById(id)
if (condition) {}
document.writeln("Text Here") //Advances to new line after text
var dateObject = new Date("11/22/2012 18:25:35")

11. To get the current value of the control for a text area
document.getElementById(id)
Math.floor(number)
document.getElementById("textAreaId").value;
document.getElementById("CheckboxId").checked = true; //Could also be false

12. The string escape sequence to insert a tab in JavaScript
getTime()
semicolon ";"
toPrecision(precision)
t

13. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
isNaN(varHere) //Returns true or false.
ondblclick
var stringVar = "part 1:" + "part 2";
document.getElementById("ButtonId").onclick = functionName;

14. A _______ variable can be changed and accessed from within and without a function or object.
var functionName = function(param1, param2, paramN) {}
<noscript>
global
document.getElementById("TextBoxId").disabled = true;

15. The identity operator for equals
document.getElementById("checkboxId").checked;
toExponential(digits)
n
===

16. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Underscores
Math.ceil(number)
substring(startIndex)
string

17. String object method used to return the position of the first instance of a specified search string starting from the specified index
document.getElementById("listId").value;
<script type="text/javascript">.....</script>
document.writeln("Text Here") //Advances to new line after text
indexOf(searchValue, startPosition)

18. To get the current checked status of the control for checkboxes
toFixed(digits)
document.getElementById("checkboxId").checked;
ondblclick
charAt(position)

19. Math object method used to return a given number rounded to the next highest integer value
Math.ceil(number)
document.getElementById("radioButtonId").checked;
document.getElementById("CheckboxId").checked = true; //Could also be false
document.getElementById("textAreaId").value;

20. The string escape sequence to insert a backslash in JavaScript
var stringVar = "part 1:" + "part 2";
\
var variableName;
document.getElementById("radioButtonId").checked;

21. Unlike ________________ identity operators do not perform type coercion.
sensitive
var functionName = function(param1, param2, paramN) {}
standard equality operators
while (condition) {}

22. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
!==
substring(startIndex, stopIndex)
isNaN(varHere) //Returns true or false.

23. To set the current value of the control for a text area
for (counter; condition; incrementor) {}
var stringVar = "part 1:" + "part 2";
document.getElementById("TextBoxId").value;
document.getElementById("textAreaId").value = "Text Value";

24. Date object method used to return a string containing the date
expression
toDateString()
(Condition_Expression) ? Value_If_True : Value_If_False;
var dateObject = new Date("11/22/2012 18:25:35")

25. To display an alert
confirm()
indexOf(searchValue, startPosition)
string
alert("Alert Text Here")

26. To set the current checked status of the control for radio buttons
sensitive
Math.abs(number)
document.getElementById("radioButtonId").checked = true; //Could also be false
Either single or double quotes surrounding the data

27. Math object method used to return the square root of a given number
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
n
Number.NEGATIVE_INFINITY
Math.sqrt(number)

28. Math object method used to return the absolute value of a given number
substring(startIndex)
document.getElementById("checkboxId").value;
focus
Math.abs(number)

29. To insert Javascript into a web page
udddd
var stringVar = prompt("Text Here")
confirm("Message Text Here")
<script type="text/javascript">.....</script>

30. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
focus
Math.floor(number)
toPrecision(precision)
document.getElementById("textAreaId").value = "Text Value";

31. The format to create a new Date object from a string
<noscript>
setMilliseconds()
document.getElementById("ButtonId").onclick = functionName;
var dateObject = new Date("11/22/2012 18:25:35")

32. To access the text element in a <span> tag
document.getElementById("checkboxId").checked;
expression
indexOf(searchValue, startPosition)
document.getElementById("spanId").firstChild;

33. To create a new Date object
document.getElementById("textAreaId").value = "Text Value";
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
confirm()
Underscores

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

35. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
document.write("Text Here") //Remains on current line
Number.NEGATIVE_INFINITY
Multi line
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

36. To get the current value for textboxes
window.onload = function() {//actions here}
document.getElementById("TextBoxId").value;
while (condition) {}
toLowerCase()

37. To code a while statement in JavaScript
t
while (condition) {}
global
toExponential(digits)

38. To get the current checked status of the control for radio buttons
setMilliseconds()
indexOf(searchValue, startPosition)
document.getElementById("radioButtonId").checked;
var dateVar = new Date()

39. Math object method used to return the lowest value for a set of supplied numbers
document.getElementById("radioButtonId").value;
'
substring(startIndex, stopIndex)
Math.min(var1, var2, varN)

40. To set the digit precision of a decimal number
toFixed(digitCount)
string
Number.NEGATIVE_INFINITY
var functionName = function(param1, param2, paramN) {}

41. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
Src - e.g. <script src="fileName.js"> //
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.abs(number)
setMilliseconds()

42. To set the control to be disabled for textboxes
===
confirm()
document.getElementById("TextBoxId").disabled = true;
toDateString()

43. To code a for statement in JavaScript
for (counter; condition; incrementor) {}
Math.max(var1, var2, varN)
document.getElementById("checkboxId").value;
window.location = "New Web Address Here";

44. Number object method used to return a number in exponential format with the specified number of decimal places
window.location()
charAt(position)
toFixed(digits)
toExponential(digits)

45. String object method used to get the character at a specified index position
isNaN(varHere) //Returns true or false.
alert("Alert Text Here")
charAt(position)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

46. What String object method returns a new string containing the value of the original string but in all upper case
document.getElementById("TextBoxId").disabled = true;
toUpperCase()
var stringVar = "part 1:" + "part 2";
indexOf(searchValue, startPosition)

47. To code an If statement in JavaScript
Objects
Math.ceil(number)
if (condition) {}
alert("Alert Text Here")

48. JavaScript is case _______
sensitive
document.getElementById("ButtonId").onclick = functionName;
document.getElementById(id)
n

49. The string escape sequence to insert a form feed in JavaScript
r
f
document.getElementById(id)
Math.sqrt(number)

50. To code a button.onclick event handler
document.getElementById("radioButtonId").checked;
Math.abs(number)
document.getElementById("ButtonId").onclick = functionName;
Use the second parameter. Example: prompt("Enter Age:", "18")