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 display an alert
alert("Alert Text Here")
Charset
Math.floor(number)
toString(base)

2. To denote a string in JavaScript
Either single or double quotes surrounding the data
alert("Alert Text Here")
r
var dateVar = new Date()

3. What String object method returns a new string containing the value of the original string but in all upper case
indexOf(searchValue, startPosition)
"
toUpperCase()
t

4. 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
semicolon ";"
document.getElementById("listId").value;
alert("Alert Text Here")
substring(startIndex, stopIndex)

5. The string escape sequence to insert a tab in JavaScript
Math.round(number)
<script type="text/javascript">.....</script>
t
window.location = "New Web Address Here";

6. This returns only True or false values
toString(base)
prompt("Text Here")
confirm()
toLowerCase()

7. The escape sequence used to insert a Unicode character into a string in JavaScript
udddd
window.onload = function() {//actions here}
if (condition) {}
<script type="text/javascript">.....</script>

8. To assign a default value to a prompt
Two forward slashes "//"
ondblclick
Use the second parameter. Example: prompt("Enter Age:", "18")
Number.NEGATIVE_INFINITY

9. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
f
toExponential(digits)
event handler .
document.getElementById("listId").value;

10. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
Objects
standard equality operators
n
document.getElementById("radioButtonId").checked = true; //Could also be false

11. To get the current checked status of the control for checkboxes
substring(startIndex)
document.getElementById("checkboxId").checked;
var dateObject = new Date("11/22/2012 18:25:35")
(Condition_Expression) ? Value_If_True : Value_If_False;

12. Unlike ________________ identity operators do not perform type coercion.
Math.pow(number, power)
toPrecision(precision)
var variableName;
standard equality operators

13. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Number.NEGATIVE_INFINITY
getFullYear()
string
isNaN(varHere) //Returns true or false.

14. The string escape sequence to start a new line in JavaScript
Objects
global
setMilliseconds()
n

15. String object method used to get the character at a specified index position
charAt(position)
\
<noscript>
toString()

16. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Multi line
Math.sqrt(number)
var functionName = function(param1, param2, paramN) {}

17. To code an If statement in JavaScript
if (condition) {}
document.getElementById(id)
document.getElementById("listId").value;
toPrecision(precision)

18. To assign the value from a prompt to a string
f
var stringVar = prompt("Text Here")
toUpperCase()
Math.random() //Returns a value >= 0.0 but <1.0

19. The format to create a new Date object from a string
document.getElementById(id)
var dateObject = new Date("11/22/2012 18:25:35")
r
redeclare

20. A _______ variable can be changed and accessed from within and without a function or object.
n
isNaN(varHere) //Returns true or false.
!==
global

21. JavaScript is case _______
<noscript>
sensitive
document.getElementById("spanId").firstChild;
toFixed(digitCount)

22. To view the current web address using JavaScript
window.location()
document.getElementById("radioButtonId").checked;
toDateString()
getTime()

23. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
confirm("Message Text Here")
expression
focus
Charset

24. To make the browser load a new page using JavaScript
Math.random() //Returns a value >= 0.0 but <1.0
while (condition) {}
window.location = "New Web Address Here";
var stringVar = "part 1:" + "part 2";

25. 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

26. To code a for statement in JavaScript
for (counter; condition; incrementor) {}
substring(startIndex)
var arrayVar = new Array()
window.onload = function() {//actions here}

27. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
ondblclick
Number.NEGATIVE_INFINITY
<noscript>
!==

28. The identity operator for not equal
toFixed(digitCount)
Math.pow(number, power)
for (counter; condition; incrementor) {}
!==

29. To create an Array object in JavaScript
var arrayVar = new Array()
document.writeln("Text Here") //Advances to new line after text
toPrecision(precision)
Use the second parameter. Example: prompt("Enter Age:", "18")

30. The string escape sequence to insert a vertical tab in JavaScript
t
v
Math.floor(number)
prompt("Text Here")

31. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Underscores
focus
Use the second parameter. Example: prompt("Enter Age:", "18")
'

32. To concatenate multiple parts into a string
toString()
toPrecision(precision)
var stringVar = "part 1:" + "part 2";
semicolon ";"

33. To get the text value of the control for radio buttons
Underscores
Charset
Src - e.g. <script src="fileName.js"> //
document.getElementById("checkboxId").value;

34. Command to display a prompt
!==
Number.NEGATIVE_INFINITY
prompt("Text Here")
concat(var1, var2, varN)

35. The string escape sequence to insert a backslash in JavaScript
window.onload = function() {//actions here}
document.getElementById("listId").value;
\
Src - e.g. <script src="fileName.js"> //

36. To assign actions to the window onLoad event
Math.abs(number)
document.getElementById("radioButtonId").checked;
window.onload = function() {//actions here}
n

37. To get the current value of the control for a text area
Math.random() //Returns a value >= 0.0 but <1.0
event handler .
document.getElementById("textAreaId").value;
ondblclick

38. The syntax of a conditional operator
toFixed(digitCount)
getFullYear()
(Condition_Expression) ? Value_If_True : Value_If_False;
Number.NEGATIVE_INFINITY

39. A statement that yields a value
document.getElementById("TextBoxId").focus;
Math.ceil(number)
Math.min(var1, var2, varN)
expression

40. To create a Date object in JavaScript
var variableName;
document.getElementById("CheckboxId").checked = true; //Could also be false
if (condition) {}
var dateVar = new Date()

41. Math object method used to return a random number
r
toPrecision(precision)
document.writeln("Text Here") //Advances to new line after text
Math.random() //Returns a value >= 0.0 but <1.0

42. String object method used to return the position of the first instance of a specified search string starting from the specified index
setMilliseconds()
indexOf(searchValue, startPosition)
n
document.getElementById("radioButtonId").checked;

43. Statements end in JavaScript with a ________
var dateObject = new Date("11/22/2012 18:25:35")
semicolon ";"
prompt("Text Here")
expression

44. To set the current checked status of the control for checkboxes
document.getElementById("CheckboxId").checked = true; //Could also be false
expression
document.getElementById("TextBoxId").focus;
document.writeln("Text Here") //Advances to new line after text

45. String object method used to return a new string that contains part of the original string from the specified start position
getFullYear()
substring(startIndex)
Use the second parameter. Example: prompt("Enter Age:", "18")
(Condition_Expression) ? Value_If_True : Value_If_False;

46. Math object method used to return the lowest value for a set of supplied numbers
toDateString()
Math.min(var1, var2, varN)
var variableName;
udddd

47. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
Math.sqrt(number)
n
setMilliseconds()

48. To write text to the current element of the DOM
Math.round(number)
Math.floor(number)
document.write("Text Here") //Remains on current line
getTime()

49. The _____ attribute is used to denote external file for script use
Src - e.g. <script src="fileName.js"> //
redeclare
document.getElementById("spanId").firstChild;
substring(startIndex, stopIndex)

50. To create a single line comment in JavaScript
standard equality operators
Two forward slashes "//"
while (condition) {}
Use the second parameter. Example: prompt("Enter Age:", "18")