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. 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
substring(startIndex, stopIndex)
"
toTimeString()
document.getElementById("checkboxId").value;

2. Command to display a prompt
Either single or double quotes surrounding the data
document.getElementById("CheckboxId").checked = true; //Could also be false
window.location = "New Web Address Here";
prompt("Text Here")

3. The string escape sequence to insert a vertical tab in JavaScript
v
confirm("Message Text Here")
alert("Alert Text Here")
Math.sqrt(number)

4. Math object method used to return the lowest value for a set of supplied numbers
substring(startIndex)
document.getElementById("spanId").firstChild.nodeValue = "New Value";
toString()
Math.min(var1, var2, varN)

5. To display an alert
toExponential(digits)
ondblclick
Math.max(var1, var2, varN)
alert("Alert Text Here")

6. The _____ attribute is used to denote external file for script use
concat(var1, var2, varN)
Src - e.g. <script src="fileName.js"> //
var arrayVar = new Array()
f

7. The string escape sequence to start a new line in JavaScript
toLowerCase()
n
if (condition) {}
Charset

8. To insert Javascript into a web page
Underscores
toFixed(digits)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
<script type="text/javascript">.....</script>

9. String object method used to concatenate multiple strings
var arrayVar = new Array()
document.getElementById("checkboxId").value;
Underscores
concat(var1, var2, varN)

10. The string escape sequence to insert a form feed in JavaScript
f
charAt(position)
var functionName = function(param1, param2, paramN) {}
<script type="text/javascript">.....</script>

11. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
toDateString()
concat(var1, var2, varN)
document.getElementById("TextBoxId").value;

12. To code a while statement in JavaScript
sensitive
t
while (condition) {}
document.getElementById("textAreaId").value;

13. Math object method used to return a given number that has been rounded to the closes integer value
\
while (condition) {}
semicolon ";"
Math.round(number)

14. Math object method used to return a given number rounded to the next highest integer value
n
toPrecision(precision)
Math.ceil(number)
toString()

15. To code an If statement in JavaScript
while (condition) {}
if (condition) {}
f
\

16. To access the text element in a <span> tag
document.getElementById("radioButtonId").value;
===
Objects
document.getElementById("spanId").firstChild;

17. The syntax of a conditional operator
(Condition_Expression) ? Value_If_True : Value_If_False;
Math.abs(number)
substring(startIndex)
Src - e.g. <script src="fileName.js"> //

18. To code a for statement in JavaScript
Multi line
document.getElementById("TextBoxId").focus;
for (counter; condition; incrementor) {}
Number.NEGATIVE_INFINITY

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

20. The identity operator for equals
var stringVar = "part 1:" + "part 2";
var arrayVar = new Array()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
===

21. To set the current checked status of the control for checkboxes
toFixed(digitCount)
Two forward slashes "//"
Multi line
document.getElementById("CheckboxId").checked = true; //Could also be false

22. To set the control to be disabled for textboxes
document.getElementById("TextBoxId").disabled = true;
document.getElementById("ButtonId").onclick = functionName;
global
toTimeString()

23. String object method used to return a new string that contains part of the original string from the specified start position
substring(startIndex)
indexOf(searchValue, startPosition)
string
toLowerCase()

24. To create a single line comment in JavaScript
var variableName;
Math.max(var1, var2, varN)
Multi line
Two forward slashes "//"

25. String object method used to return the position of the first instance of a specified search string starting from the specified index
document.getElementById(id)
for (counter; condition; incrementor) {}
var answerVar = confirm("Message Text Here")
indexOf(searchValue, startPosition)

26. To set the digit precision of a decimal number
Two forward slashes "//"
toFixed(digitCount)
indexOf(searchValue, startPosition)
var dateObject = new Date("11/22/2012 18:25:35")

27. To code a button.onclick event handler
===
Math.pow(number, power)
document.getElementById("ButtonId").onclick = functionName;
event handler .

28. To make the browser load a new page using JavaScript
toString()
document.getElementById("radioButtonId").value;
toUpperCase()
window.location = "New Web Address Here";

29. To access a page element by id
charAt(position)
Math.pow(number, power)
document.getElementById(id)
string

30. Number object method used to round numbers to the specified number of decimal places
var dateObject = new Date("11/22/2012 18:25:35")
while (condition) {}
toFixed(digits)
Math.pow(number, power)

31. To create a new Date object
prompt("Text Here")
"
'
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

32. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
getFullYear()
Objects
Src - e.g. <script src="fileName.js"> //
Math.min(var1, var2, varN)

33. 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

34. To create a function that returns a value in JavaScript
toString(base)
(Condition_Expression) ? Value_If_True : Value_If_False;
var functionName = function(param1, param2, paramN) {}
confirm()

35. The identity operator for not equal
!==
toFixed(digitCount)
udddd
toUpperCase()

36. When you add a string and a number the result will be a ____
Either single or double quotes surrounding the data
document.getElementById("spanId").firstChild.nodeValue = "New Value";
string
expression

37. To write a line to the current element of the DOM (Document Object Model)
sensitive
document.writeln("Text Here") //Advances to new line after text
confirm("Message Text Here")
document.getElementById("textAreaId").value = "Text Value";

38. Number object method used to return a numerical string with the specified number of significant digits
substring(startIndex)
getTime()
for (counter; condition; incrementor) {}
toPrecision(precision)

39. Math object method used to return a given number rounded to the next lowest integer value
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.floor(number)
confirm()
Math.max(var1, var2, varN)

40. To assign a default value to a prompt
toString()
for (counter; condition; incrementor) {}
Use the second parameter. Example: prompt("Enter Age:", "18")
charAt(position)

41. To test that a variable contains a valid number
Underscores
toFixed(digitCount)
isNaN(varHere) //Returns true or false.
Math.random() //Returns a value >= 0.0 but <1.0

42. The four attributes of the <script> tag:Type - Src - _____ and Defer
toString(base)
Charset
for (counter; condition; incrementor) {}
===

43. To alter the value of the text element in a span tag
toFixed(digitCount)
Math.abs(number)
document.getElementById("spanId").firstChild.nodeValue = "New Value";
ondblclick

44. Math object method used to return the square root of a given number
Math.sqrt(number)
Math.round(number)
Two forward slashes "//"
Src - e.g. <script src="fileName.js"> //

45. String object method used to get the character at a specified index position
event handler .
Math.ceil(number)
charAt(position)
prompt("Text Here")

46. To get the current checked status of the control for radio buttons
Math.ceil(number)
document.getElementById("radioButtonId").checked;
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.floor(number)

47. To create a Date object in JavaScript
var dateVar = new Date()
toLowerCase()
var stringVar = "part 1:" + "part 2";
getTime()

48. Date object method used to return a string containing the time
toTimeString()
toPrecision(precision)
Multi line
var dateObject = new Date("11/22/2012 18:25:35")

49. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
Objects
alert("Alert Text Here")
Underscores
confirm()

50. The string escape sequence to insert a tab in JavaScript
Math.pow(number, power)
substring(startIndex)
document.getElementById("radioButtonId").value;
t