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 events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
ondblclick
var arrayVar = new Array()
Math.sqrt(number)
window.location()

2. To assign actions to the window onLoad event
document.getElementById("spanId").firstChild;
window.onload = function() {//actions here}
confirm("Message Text Here")
toDateString()

3. To make the browser load a new page using JavaScript
Number.NEGATIVE_INFINITY
Objects
window.location = "New Web Address Here";
expression

4. Math object method used to return the absolute value of a given number
Math.floor(number)
Math.abs(number)
!==
Math.ceil(number)

5. Date object method used to return a string containing the date and time
getFullYear()
document.getElementById("TextBoxId").value;
toString()
v

6. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Underscores
udddd
v
for (counter; condition; incrementor) {}

7. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
concat(var1, var2, varN)
Objects
Number.NEGATIVE_INFINITY
if (condition) {}

8. Math object method used to return the lowest value for a set of supplied numbers
global
toFixed(digitCount)
Math.min(var1, var2, varN)
toString()

9. To code a button.onclick event handler
document.getElementById("CheckboxId").checked = true; //Could also be false
document.getElementById("checkboxId").value;
<script type="text/javascript">.....</script>
document.getElementById("ButtonId").onclick = functionName;

10. 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

11. To get the current checked status of the control for checkboxes
Charset
toLowerCase()
document.getElementById("checkboxId").checked;
document.write("Text Here") //Remains on current line

12. The four attributes of the <script> tag:Type - Src - _____ and Defer
getTime()
var stringVar = "part 1:" + "part 2";
Math.max(var1, var2, varN)
Charset

13. A statement that yields a value
toPrecision(precision)
document.getElementById("checkboxId").checked;
expression
event handler .

14. To denote a string in JavaScript
Either single or double quotes surrounding the data
Math.floor(number)
Math.min(var1, var2, varN)
var variableName;

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

16. Unlike ________________ identity operators do not perform type coercion.
Math.max(var1, var2, varN)
t
standard equality operators
Src - e.g. <script src="fileName.js"> //

17. To write a line to the current element of the DOM (Document Object Model)
document.getElementById("ButtonId").onclick = functionName;
getTime()
t
document.writeln("Text Here") //Advances to new line after text

18. JavaScript is case _______
standard equality operators
Underscores
Either single or double quotes surrounding the data
sensitive

19. The identity operator for not equal
===
udddd
Src - e.g. <script src="fileName.js"> //
!==

20. To create a new Date object
Objects
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
var stringVar = prompt("Text Here")
document.getElementById("textAreaId").value;

21. To declare a variable in JavaScript
window.onload = function() {//actions here}
Math.min(var1, var2, varN)
var variableName;
confirm()

22. The syntax of a conditional operator
toExponential(digits)
(Condition_Expression) ? Value_If_True : Value_If_False;
Src - e.g. <script src="fileName.js"> //
document.write("Text Here") //Remains on current line

23. Math object method used to return the square root of a given number
'
document.getElementById("TextBoxId").focus;
"
Math.sqrt(number)

24. To get the current value for textboxes
concat(var1, var2, varN)
Objects
Math.pow(number, power)
document.getElementById("TextBoxId").value;

25. The string escape sequence to insert a double quote in JavaScript
Two forward slashes "//"
Use the second parameter. Example: prompt("Enter Age:", "18")
"
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

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

27. To test that a variable contains a valid number
isNaN(varHere) //Returns true or false.
document.getElementById("textAreaId").value;
Multi line
setMilliseconds()

28. The escape sequence used to insert a Unicode character into a string in JavaScript
udddd
(Condition_Expression) ? Value_If_True : Value_If_False;
Number.NEGATIVE_INFINITY
'

29. To get the text value of the control for radio buttons
sensitive
standard equality operators
f
document.getElementById("checkboxId").value;

30. To access a page element by id
"
ondblclick
document.getElementById(id)
Math.round(number)

31. To get the current value of the control for a text area
r
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.sqrt(number)
document.getElementById("textAreaId").value;

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

33. To get the text value of the control for radio buttons
var variableName;
document.getElementById("spanId").firstChild;
document.getElementById("radioButtonId").value;
toLowerCase()

34. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
toLowerCase()
event handler .
document.getElementById("TextBoxId").focus;
document.getElementById("spanId").firstChild.nodeValue = "New Value";

35. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
getFullYear()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.round(number)
!==

36. To set the current checked status of the control for checkboxes
window.location = "New Web Address Here";
document.writeln("Text Here") //Advances to new line after text
document.getElementById("CheckboxId").checked = true; //Could also be false
expression

37. To code a while statement in JavaScript
getFullYear()
\
while (condition) {}
string

38. The string escape sequence to insert a form feed in JavaScript
f
ondblclick
Either single or double quotes surrounding the data
setMilliseconds()

39. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
document.getElementById("TextBoxId").value;
(Condition_Expression) ? Value_If_True : Value_If_False;
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
focus

40. ________ comments start with / and end with /.
confirm()
document.getElementById(id)
v
Multi line

41. To assign the value from a prompt to a string
!==
var stringVar = prompt("Text Here")
document.write("Text Here") //Remains on current line
Number.NEGATIVE_INFINITY

42. To write text to the current element of the DOM
document.getElementById("TextBoxId").value;
toFixed(digits)
document.write("Text Here") //Remains on current line
Math.abs(number)

43. To insert Javascript into a web page
for (counter; condition; incrementor) {}
<script type="text/javascript">.....</script>
toString()
toDateString()

44. When you add a string and a number the result will be a ____
<script type="text/javascript">.....</script>
string
Charset
document.write("Text Here") //Remains on current line

45. To assign a default value to a prompt
document.getElementById("TextBoxId").value;
r
Use the second parameter. Example: prompt("Enter Age:", "18")
var answerVar = confirm("Message Text Here")

46. The string escape sequence to insert a carriage return in JavaScript
string
toString(base)
f
r

47. To access the text element in a <span> tag
string
document.getElementById("spanId").firstChild;
toString()
!==

48. To get the current checked status of the control for radio buttons
document.write("Text Here") //Remains on current line
charAt(position)
document.getElementById("radioButtonId").checked;
concat(var1, var2, varN)

49. Statements end in JavaScript with a ________
for (counter; condition; incrementor) {}
semicolon ";"
Math.round(number)
Underscores

50. Date object method used to return a string containing the time
toString()
document.getElementById("textAreaId").value;
var stringVar = prompt("Text Here")
toTimeString()