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 string escape sequence to insert a tab in JavaScript
Charset
window.location = "New Web Address Here";
t
if (condition) {}

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

3. The string escape sequence to insert a vertical tab in JavaScript
isNaN(varHere) //Returns true or false.
v
toFixed(digitCount)
(Condition_Expression) ? Value_If_True : Value_If_False;

4. To set the current checked status of the control for checkboxes
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.floor(number)
document.writeln("Text Here") //Advances to new line after text
Math.max(var1, var2, varN)

5. A _______ variable can be changed and accessed from within and without a function or object.
isNaN(varHere) //Returns true or false.
Charset
global
r

6. To assign actions to the window onLoad event
indexOf(searchValue, startPosition)
toTimeString()
charAt(position)
window.onload = function() {//actions here}

7. To create a function that returns a value in JavaScript
getTime()
Math.round(number)
var functionName = function(param1, param2, paramN) {}
var dateVar = new Date()

8. To create a Date object in JavaScript
window.location = "New Web Address Here";
!==
var dateVar = new Date()
Src - e.g. <script src="fileName.js"> //

9. This returns only True or false values
sensitive
getFullYear()
document.getElementById("listId").value;
confirm()

10. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
toString()
Multi line
Objects
document.getElementById("spanId").firstChild;

11. To assign a default value to a prompt
f
===
Math.max(var1, var2, varN)
Use the second parameter. Example: prompt("Enter Age:", "18")

12. To get the value or the currently selected item for lists
window.location = "New Web Address Here";
Either single or double quotes surrounding the data
document.getElementById("radioButtonId").value;
document.getElementById("listId").value;

13. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Number.NEGATIVE_INFINITY
substring(startIndex, stopIndex)
Math.min(var1, var2, varN)
isNaN(varHere) //Returns true or false.

14. To write a line to the current element of the DOM (Document Object Model)
document.writeln("Text Here") //Advances to new line after text
Either single or double quotes surrounding the data
Math.round(number)
toLowerCase()

15. The syntax of a conditional operator
Multi line
confirm("Message Text Here")
(Condition_Expression) ? Value_If_True : Value_If_False;
toString(base)

16. Date object method used to return a string containing the date and time
toString()
<script type="text/javascript">.....</script>
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("checkboxId").value;

17. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
semicolon ";"
getFullYear()
f
alert("Alert Text Here")

18. Number object method used to return a number in exponential format with the specified number of decimal places
toTimeString()
toExponential(digits)
Charset
alert("Alert Text Here")

19. JavaScript is case _______
expression
sensitive
var stringVar = "part 1:" + "part 2";
getFullYear()

20. The string escape sequence to insert a backslash in JavaScript
document.getElementById("TextBoxId").disabled = true;
standard equality operators
Src - e.g. <script src="fileName.js"> //
\

21. Number object method used to return a string with a given number base
document.getElementById("checkboxId").checked;
toString(base)
Math.max(var1, var2, varN)
focus

22. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
Math.round(number)
substring(startIndex, stopIndex)
document.getElementById("TextBoxId").disabled = true;
<noscript>

23. To access a page element by id
substring(startIndex)
Math.ceil(number)
global
document.getElementById(id)

24. To code an If statement in JavaScript
if (condition) {}
toFixed(digitCount)
document.getElementById("checkboxId").value;
document.getElementById("radioButtonId").checked;

25. Math object method used to return the lowest value for a set of supplied numbers
window.onload = function() {//actions here}
Math.min(var1, var2, varN)
window.location = "New Web Address Here";
document.getElementById("radioButtonId").value;

26. Math object method used to return the square root of a given number
var answerVar = confirm("Message Text Here")
document.getElementById("checkboxId").value;
n
Math.sqrt(number)

27. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
document.getElementById("textAreaId").value = "Text Value";
getTime()
var dateObject = new Date("11/22/2012 18:25:35")

28. To set the current value of the control for a text area
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("TextBoxId").value;
var functionName = function(param1, param2, paramN) {}
ondblclick

29. When you __________ a javascript variable it retains its original value
redeclare
document.writeln("Text Here") //Advances to new line after text
document.getElementById("textAreaId").value;
document.getElementById("radioButtonId").checked;

30. To assign the return value of confirm() to a variable
var answerVar = confirm("Message Text Here")
toFixed(digits)
Underscores
document.getElementById("ButtonId").onclick = functionName;

31. To get the current value for textboxes
document.getElementById("TextBoxId").value;
document.getElementById("ButtonId").onclick = functionName;
v
Math.round(number)

32. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
toUpperCase()
Multi line
var variableName;

33. What Date object method is used to return the number of milliseconds since the start of GMT
toDateString()
getTime()
document.getElementById("spanId").firstChild;
string

34. To get the text value of the control for radio buttons
toTimeString()
document.getElementById("checkboxId").value;
var functionName = function(param1, param2, paramN) {}
toUpperCase()

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

36. Number object method used to return a numerical string with the specified number of significant digits
toPrecision(precision)
window.onload = function() {//actions here}
document.getElementById("TextBoxId").focus;
var dateObject = new Date("11/22/2012 18:25:35")

37. ________ comments start with / and end with /.
r
charAt(position)
Math.min(var1, var2, varN)
Multi line

38. Math object method used to return the absolute value of a given number
Math.abs(number)
toFixed(digitCount)
string
sensitive

39. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
!==
semicolon ";"
event handler .
document.getElementById("TextBoxId").disabled = true;

40. To set the current checked status of the control for radio buttons
toLowerCase()
Use the second parameter. Example: prompt("Enter Age:", "18")
Math.min(var1, var2, varN)
document.getElementById("radioButtonId").checked = true; //Could also be false

41. The string escape sequence to start a new line in JavaScript
Math.floor(number)
n
f
Underscores

42. Math object method used to return a given number rounded to the next highest integer value
isNaN(varHere) //Returns true or false.
substring(startIndex)
Objects
Math.ceil(number)

43. Unlike ________________ identity operators do not perform type coercion.
substring(startIndex, stopIndex)
standard equality operators
<noscript>
string

44. To display a confirmation
document.writeln("Text Here") //Advances to new line after text
if (condition) {}
semicolon ";"
confirm("Message Text Here")

45. To denote a string in JavaScript
Either single or double quotes surrounding the data
r
substring(startIndex)
toFixed(digitCount)

46. String object method used to concatenate multiple strings
concat(var1, var2, varN)
udddd
===
event handler .

47. When you add a string and a number the result will be a ____
for (counter; condition; incrementor) {}
document.write("Text Here") //Remains on current line
toString()
string

48. Math object method used to return a given number raised to a given power
Math.round(number)
isNaN(varHere) //Returns true or false.
'
Math.pow(number, power)

49. String object method used to return the position of the first instance of a specified search string starting from the specified index
===
document.getElementById("checkboxId").value;
indexOf(searchValue, startPosition)
ondblclick

50. The format to create a new Date object from a string
toLowerCase()
\
confirm("Message Text Here")
var dateObject = new Date("11/22/2012 18:25:35")