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 the value from a prompt to a string
var stringVar = prompt("Text Here")
document.writeln("Text Here") //Advances to new line after text
standard equality operators
f

2. To display a confirmation
Math.random() //Returns a value >= 0.0 but <1.0
semicolon ";"
confirm("Message Text Here")
indexOf(searchValue, startPosition)

3. String object method used to get the character at a specified index position
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
<noscript>
charAt(position)
var stringVar = "part 1:" + "part 2";

4. The four attributes of the <script> tag:Type - Src - _____ and Defer
Math.ceil(number)
Two forward slashes "//"
toTimeString()
Charset

5. The format to create a new Date object from a string
var stringVar = prompt("Text Here")
var dateObject = new Date("11/22/2012 18:25:35")
ondblclick
event handler .

6. The string escape sequence to insert a carriage return in JavaScript
r
getTime()
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("radioButtonId").checked;

7. To make the browser load a new page using JavaScript
document.getElementById("CheckboxId").checked = true; //Could also be false
window.location = "New Web Address Here";
Math.round(number)
Math.max(var1, var2, varN)

8. To access the text element in a <span> tag
toExponential(digits)
var functionName = function(param1, param2, paramN) {}
document.getElementById("spanId").firstChild;
substring(startIndex, stopIndex)

9. To alter the value of the text element in a span tag
udddd
toUpperCase()
document.getElementById(id)
document.getElementById("spanId").firstChild.nodeValue = "New Value";

10. Date object method used to return a string containing the date and time
toString()
Math.round(number)
\
var answerVar = confirm("Message Text Here")

11. To get the value or the currently selected item for lists
window.onload = function() {//actions here}
document.getElementById("listId").value;
document.getElementById("ButtonId").onclick = functionName;
sensitive

12. The string escape sequence to insert a double quote in JavaScript
document.getElementById("spanId").firstChild;
indexOf(searchValue, startPosition)
standard equality operators
"

13. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
Math.ceil(number)
Math.pow(number, power)
n

14. The string escape sequence to insert a vertical tab in JavaScript
focus
v
udddd
Math.round(number)

15. The string escape sequence to insert a tab in JavaScript
var stringVar = "part 1:" + "part 2";
setMilliseconds()
t
charAt(position)

16. To assign the return value of confirm() to a variable
var answerVar = confirm("Message Text Here")
document.getElementById("radioButtonId").value;
document.getElementById("TextBoxId").disabled = true;
(Condition_Expression) ? Value_If_True : Value_If_False;

17. To code a button.onclick event handler
r
Math.min(var1, var2, varN)
Multi line
document.getElementById("ButtonId").onclick = functionName;

18. To create a function in JavaScript
var functionName = function(param1, param2, paramN) {}
semicolon ";"
toExponential(digits)
===

19. 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

20. To create an Array object in JavaScript
concat(var1, var2, varN)
var answerVar = confirm("Message Text Here")
Math.max(var1, var2, varN)
var arrayVar = new Array()

21. When you __________ a javascript variable it retains its original value
substring(startIndex)
(Condition_Expression) ? Value_If_True : Value_If_False;
redeclare
f

22. When you add a string and a number the result will be a ____
window.location()
ondblclick
string
concat(var1, var2, varN)

23. To set the current checked status of the control for radio buttons
document.getElementById("TextBoxId").focus;
f
Objects
document.getElementById("radioButtonId").checked = true; //Could also be false

24. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
toLowerCase()
var functionName = function(param1, param2, paramN) {}
window.onload = function() {//actions here}
setMilliseconds()

25. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
focus
<noscript>
toString(base)
toExponential(digits)

26. To set the control to be disabled for textboxes
toPrecision(precision)
isNaN(varHere) //Returns true or false.
if (condition) {}
document.getElementById("TextBoxId").disabled = true;

27. The _____ attribute is used to denote external file for script use
toTimeString()
udddd
var functionName = function(param1, param2, paramN) {}
Src - e.g. <script src="fileName.js"> //

28. To set the digit precision of a decimal number
var arrayVar = new Array()
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("textAreaId").value;
toFixed(digitCount)

29. Statements end in JavaScript with a ________
Underscores
t
Math.round(number)
semicolon ";"

30. To code a while statement in JavaScript
<script type="text/javascript">.....</script>
document.getElementById("checkboxId").checked;
while (condition) {}
t

31. Number object method used to return a string with a given number base
toString(base)
Charset
substring(startIndex, stopIndex)
sensitive

32. To create a function that returns a value in JavaScript
if (condition) {}
var functionName = function(param1, param2, paramN) {}
document.getElementById("checkboxId").checked;
Use the second parameter. Example: prompt("Enter Age:", "18")

33. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
toString()
"
var variableName;
ondblclick

34. To view the current web address using JavaScript
toFixed(digitCount)
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("textAreaId").value;
window.location()

35. To create a new Date object
t
toString(base)
for (counter; condition; incrementor) {}
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

36. Number object method used to round numbers to the specified number of decimal places
toFixed(digits)
"
document.getElementById("listId").value;
udddd

37. String object method used to return a new string that contains part of the original string from the specified start position
var arrayVar = new Array()
\
(Condition_Expression) ? Value_If_True : Value_If_False;
substring(startIndex)

38. To set the current value of the control for a text area
string
document.getElementById("textAreaId").value = "Text Value";
standard equality operators
document.write("Text Here") //Remains on current line

39. Number object method used to return a numerical string with the specified number of significant digits
isNaN(varHere) //Returns true or false.
===
document.getElementById("spanId").firstChild;
toPrecision(precision)

40. The identity operator for not equal
===
\
standard equality operators
!==

41. 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)
Either single or double quotes surrounding the data
window.onload = function() {//actions here}

42. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
semicolon ";"
toDateString()
getFullYear()
Objects

43. To access a page element by id
Math.floor(number)
document.getElementById(id)
v
for (counter; condition; incrementor) {}

44. A _______ variable can be changed and accessed from within and without a function or object.
Underscores
sensitive
global
Math.abs(number)

45. This returns only True or false values
string
confirm()
setMilliseconds()
toPrecision(precision)

46. To get the current value of the control for a text area
Math.ceil(number)
semicolon ";"
charAt(position)
document.getElementById("textAreaId").value;

47. To write a line to the current element of the DOM (Document Object Model)
document.getElementById("CheckboxId").checked = true; //Could also be false
isNaN(varHere) //Returns true or false.
prompt("Text Here")
document.writeln("Text Here") //Advances to new line after text

48. Number object method used to return a number in exponential format with the specified number of decimal places
toExponential(digits)
focus
t
setMilliseconds()

49. To display an alert
expression
<script type="text/javascript">.....</script>
confirm("Message Text Here")
alert("Alert Text Here")

50. Math object method used to return the lowest value for a set of supplied numbers
toString()
var dateObject = new Date("11/22/2012 18:25:35")
Math.min(var1, var2, varN)
Math.ceil(number)