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 assign a default value to a prompt
concat(var1, var2, varN)
===
Use the second parameter. Example: prompt("Enter Age:", "18")
Objects

2. To create a new Date object
string
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Objects
document.getElementById("TextBoxId").focus;

3. To make the browser load a new page using JavaScript
<noscript>
window.location = "New Web Address Here";
document.getElementById("TextBoxId").value;
window.location()

4. To create a Date object in JavaScript
var arrayVar = new Array()
document.getElementById("TextBoxId").disabled = true;
event handler .
var dateVar = new Date()

5. JavaScript is case _______
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
<noscript>
document.getElementById("textAreaId").value = "Text Value";
sensitive

6. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
setMilliseconds()
var stringVar = "part 1:" + "part 2";
toTimeString()

7. Date object method used to return a string containing the time
\
document.getElementById("textAreaId").value;
document.getElementById("checkboxId").value;
toTimeString()

8. This returns only True or false values
document.getElementById("checkboxId").value;
window.location()
<noscript>
confirm()

9. Number object method used to round numbers to the specified number of decimal places
if (condition) {}
Math.random() //Returns a value >= 0.0 but <1.0
toFixed(digits)
setMilliseconds()

10. To assign the value from a prompt to a string
document.getElementById("TextBoxId").disabled = true;
var stringVar = prompt("Text Here")
document.write("Text Here") //Remains on current line
document.getElementById("TextBoxId").value;

11. The escape sequence used to insert a Unicode character into a string in JavaScript
\
udddd
r
confirm("Message Text Here")

12. When you __________ a javascript variable it retains its original value
Multi line
redeclare
isNaN(varHere) //Returns true or false.
var arrayVar = new Array()

13. To assign actions to the window onLoad event
'
if (condition) {}
substring(startIndex)
window.onload = function() {//actions here}

14. The string escape sequence to start a new line in JavaScript
n
while (condition) {}
document.getElementById("TextBoxId").disabled = true;
getFullYear()

15. Number object method used to return a string with a given number base
<script type="text/javascript">.....</script>
toString(base)
Underscores
document.getElementById("listId").value;

16. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
Objects
Underscores
Math.abs(number)
document.getElementById("TextBoxId").value;

17. Math object method used to return a given number that has been rounded to the closes integer value
Math.round(number)
Math.floor(number)
v
t

18. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
event handler .
!==
Math.abs(number)
window.onload = function() {//actions here}

19. The syntax of a conditional operator
(Condition_Expression) ? Value_If_True : Value_If_False;
substring(startIndex)
Math.abs(number)
document.getElementById("radioButtonId").checked = true; //Could also be false

20. The string escape sequence to insert a tab in JavaScript
var stringVar = "part 1:" + "part 2";
t
setMilliseconds()
document.getElementById(id)

21. Math object method used to return a given number raised to a given power
redeclare
Math.pow(number, power)
v
var variableName;

22. To set the digit precision of a decimal number
===
Either single or double quotes surrounding the data
toString(base)
toFixed(digitCount)

23. 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)
!==
var stringVar = prompt("Text Here")
expression

24. Math object method used to return a given number rounded to the next lowest integer value
while (condition) {}
alert("Alert Text Here")
Math.floor(number)
document.getElementById("TextBoxId").disabled = true;

25. Date object method used to return a string containing the date and time
document.getElementById("TextBoxId").value;
document.getElementById("textAreaId").value = "Text Value";
var functionName = function(param1, param2, paramN) {}
toString()

26. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Math.floor(number)
Underscores
document.write("Text Here") //Remains on current line
Charset

27. To set the current checked status of the control for radio buttons
indexOf(searchValue, startPosition)
toUpperCase()
document.getElementById("radioButtonId").value;
document.getElementById("radioButtonId").checked = true; //Could also be false

28. To alter the value of the text element in a span tag
Src - e.g. <script src="fileName.js"> //
redeclare
ondblclick
document.getElementById("spanId").firstChild.nodeValue = "New Value";

29. 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

30. ________ comments start with / and end with /.
Math.random() //Returns a value >= 0.0 but <1.0
Multi line
setMilliseconds()
event handler .

31. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
toFixed(digitCount)
Math.random() //Returns a value >= 0.0 but <1.0
ondblclick
Use the second parameter. Example: prompt("Enter Age:", "18")

32. To code a while statement in JavaScript
document.getElementById("textAreaId").value;
var dateObject = new Date("11/22/2012 18:25:35")
while (condition) {}
string

33. To concatenate multiple parts into a string
Multi line
var stringVar = "part 1:" + "part 2";
document.getElementById("ButtonId").onclick = functionName;
getFullYear()

34. To get the current checked status of the control for checkboxes
document.getElementById(id)
var functionName = function(param1, param2, paramN) {}
document.getElementById("TextBoxId").disabled = true;
document.getElementById("checkboxId").checked;

35. To display a confirmation
confirm("Message Text Here")
var functionName = function(param1, param2, paramN) {}
document.getElementById("TextBoxId").value;
Charset

36. To set focus on the control for textboxes
Math.max(var1, var2, varN)
focus
document.getElementById("TextBoxId").focus;
document.getElementById("TextBoxId").disabled = true;

37. To get the text value of the control for radio buttons
prompt("Text Here")
document.getElementById("TextBoxId").focus;
Use the second parameter. Example: prompt("Enter Age:", "18")
document.getElementById("radioButtonId").value;

38. To set the current value of the control for a text area
r
document.getElementById("textAreaId").value = "Text Value";
toString()
Math.max(var1, var2, varN)

39. What String object method returns a new string containing the value of the original string but in all upper case
toUpperCase()
document.getElementById("spanId").firstChild;
redeclare
Either single or double quotes surrounding the data

40. Math object method used to return a given number rounded to the next highest integer value
document.getElementById(id)
Math.ceil(number)
standard equality operators
Objects

41. To code a button.onclick event handler
toFixed(digits)
Math.round(number)
Multi line
document.getElementById("ButtonId").onclick = functionName;

42. Number object method used to return a number in exponential format with the specified number of decimal places
window.onload = function() {//actions here}
toExponential(digits)
r
f

43. To assign the value from a prompt to a non-string variable
concat(var1, var2, varN)
document.getElementById("CheckboxId").checked = true; //Could also be false
substring(startIndex, stopIndex)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

44. The string escape sequence to insert a double quote in JavaScript
document.getElementById("TextBoxId").disabled = true;
"
while (condition) {}
Charset

45. A statement that yields a value
document.getElementById("radioButtonId").checked = true; //Could also be false
Multi line
Either single or double quotes surrounding the data
expression

46. To set the current checked status of the control for checkboxes
charAt(position)
document.getElementById("CheckboxId").checked = true; //Could also be false
r
expression

47. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
Math.round(number)
Number.NEGATIVE_INFINITY
var stringVar = prompt("Text Here")
document.getElementById("TextBoxId").value;

48. To assign the return value of confirm() to a variable
event handler .
toTimeString()
'
var answerVar = confirm("Message Text Here")

49. The identity operator for equals
charAt(position)
sensitive
!==
===

50. Number object method used to return a numerical string with the specified number of significant digits
toPrecision(precision)
var stringVar = "part 1:" + "part 2";
toFixed(digitCount)
var dateObject = new Date("11/22/2012 18:25:35")