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. Math object method used to return the square root of a given number
n
confirm()
Math.sqrt(number)
t

2. To get the current checked status of the control for checkboxes
expression
document.getElementById("checkboxId").checked;
while (condition) {}
ondblclick

3. To display an alert
alert("Alert Text Here")
n
var variableName;
===

4. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
document.getElementById("listId").value;
event handler .
document.getElementById("checkboxId").checked;
Math.pow(number, power)

5. To code an If statement in JavaScript
t
if (condition) {}
Two forward slashes "//"
toFixed(digits)

6. The _____ attribute is used to denote external file for script use
string
Src - e.g. <script src="fileName.js"> //
document.getElementById("spanId").firstChild.nodeValue = "New Value";
getTime()

7. To declare a variable in JavaScript
Multi line
var variableName;
Math.round(number)
string

8. To get the current checked status of the control for radio buttons
Use the second parameter. Example: prompt("Enter Age:", "18")
substring(startIndex)
window.location = "New Web Address Here";
document.getElementById("radioButtonId").checked;

9. Math object method used to return the lowest value for a set of supplied numbers
toFixed(digitCount)
var stringVar = "part 1:" + "part 2";
Number.NEGATIVE_INFINITY
Math.min(var1, var2, varN)

10. A statement that yields a value
document.getElementById(id)
var dateObject = new Date("11/22/2012 18:25:35")
expression
var stringVar = "part 1:" + "part 2";

11. To assign the value from a prompt to a non-string variable
prompt("Text Here")
Math.sqrt(number)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
\

12. Date object method used to return a string containing the date
concat(var1, var2, varN)
Charset
toDateString()
charAt(position)

13. To create a function that returns a value in JavaScript
udddd
(Condition_Expression) ? Value_If_True : Value_If_False;
var answerVar = confirm("Message Text Here")
var functionName = function(param1, param2, paramN) {}

14. Math object method used to return a given number raised to a given power
Math.pow(number, power)
alert("Alert Text Here")
toTimeString()
focus

15. To create a function in JavaScript
'
var dateVar = new Date()
toFixed(digits)
var functionName = function(param1, param2, paramN) {}

16. To assign the value from a prompt to a string
substring(startIndex, stopIndex)
var stringVar = prompt("Text Here")
event handler .
window.location = "New Web Address Here";

17. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
document.getElementById("ButtonId").onclick = functionName;
document.getElementById("spanId").firstChild;
<noscript>
document.write("Text Here") //Remains on current line

18. The format to create a new Date object from a string
toString(base)
var dateObject = new Date("11/22/2012 18:25:35")
<script type="text/javascript">.....</script>
document.getElementById("TextBoxId").disabled = true;

19. Number object method used to return a numerical string with the specified number of significant digits
Src - e.g. <script src="fileName.js"> //
Use the second parameter. Example: prompt("Enter Age:", "18")
toPrecision(precision)
global

20. Math object method used to return a given number that has been rounded to the closes integer value
var arrayVar = new Array()
var answerVar = confirm("Message Text Here")
Math.round(number)
Math.min(var1, var2, varN)

21. To get the text value of the control for radio buttons
document.getElementById("radioButtonId").value;
getTime()
prompt("Text Here")
document.getElementById("textAreaId").value;

22. The string escape sequence to insert a double quote in JavaScript
"
for (counter; condition; incrementor) {}
redeclare
document.writeln("Text Here") //Advances to new line after text

23. What String object method returns a new string containing the value of the original string but in all upper case
toUpperCase()
confirm()
<noscript>
window.onload = function() {//actions here}

24. Statements end in JavaScript with a ________
var answerVar = confirm("Message Text Here")
confirm()
semicolon ";"
<script type="text/javascript">.....</script>

25. To create a single line comment in JavaScript
Two forward slashes "//"
Underscores
document.getElementById("checkboxId").checked;
v

26. The string escape sequence to insert a backslash in JavaScript
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("radioButtonId").value;
semicolon ";"
\

27. Unlike ________________ identity operators do not perform type coercion.
document.getElementById("spanId").firstChild;
f
standard equality operators
var dateVar = new Date()

28. The identity operator for equals
Charset
var stringVar = "part 1:" + "part 2";
document.write("Text Here") //Remains on current line
===

29. Number object method used to round numbers to the specified number of decimal places
setMilliseconds()
Math.max(var1, var2, varN)
toFixed(digits)
(Condition_Expression) ? Value_If_True : Value_If_False;

30. The string escape sequence to start a new line in JavaScript
n
charAt(position)
Math.max(var1, var2, varN)
document.getElementById("spanId").firstChild;

31. To code a button.onclick event handler
var stringVar = "part 1:" + "part 2";
document.getElementById("ButtonId").onclick = functionName;
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("spanId").firstChild.nodeValue = "New Value";

32. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
setMilliseconds()
toPrecision(precision)
window.onload = function() {//actions here}
Number.NEGATIVE_INFINITY

33. To get the current value for textboxes
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
document.write("Text Here") //Remains on current line
Math.min(var1, var2, varN)
document.getElementById("TextBoxId").value;

34. Math object method used to return the highest value from a set of supplied numbers
Multi line
confirm()
Math.random() //Returns a value >= 0.0 but <1.0
Math.max(var1, var2, varN)

35. Date object method used to return a string containing the time
toTimeString()
document.getElementById("TextBoxId").value;
"
'

36. To assign actions to the window onLoad event
Math.ceil(number)
for (counter; condition; incrementor) {}
confirm("Message Text Here")
window.onload = function() {//actions here}

37. To set the current checked status of the control for checkboxes
toUpperCase()
toString()
<noscript>
document.getElementById("CheckboxId").checked = true; //Could also be false

38. To write text to the current element of the DOM
document.write("Text Here") //Remains on current line
while (condition) {}
document.getElementById("TextBoxId").focus;
getTime()

39. 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
"
var stringVar = prompt("Text Here")
substring(startIndex, stopIndex)
===

40. String object method used to get the character at a specified index position
charAt(position)
toString(base)
toTimeString()
Multi line

41. Date object method used to return a string containing the date and time
toLowerCase()
toString()
document.getElementById("TextBoxId").focus;
document.getElementById("radioButtonId").value;

42. To set the current checked status of the control for radio buttons
document.getElementById("textAreaId").value = "Text Value";
Math.random() //Returns a value >= 0.0 but <1.0
semicolon ";"
document.getElementById("radioButtonId").checked = true; //Could also be false

43. String object method used to return the position of the first instance of a specified search string starting from the specified index
Math.round(number)
Either single or double quotes surrounding the data
indexOf(searchValue, startPosition)
toString(base)

44. The four attributes of the <script> tag:Type - Src - _____ and Defer
toExponential(digits)
standard equality operators
toTimeString()
Charset

45. The escape sequence used to insert a Unicode character into a string in JavaScript
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Either single or double quotes surrounding the data
udddd
document.getElementById(id)

46. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
event handler .
===
Number.NEGATIVE_INFINITY

47. To assign the return value of confirm() to a variable
indexOf(searchValue, startPosition)
window.location = "New Web Address Here";
document.getElementById("textAreaId").value;
var answerVar = confirm("Message Text Here")

48. The string escape sequence to insert a vertical tab in JavaScript
prompt("Text Here")
v
var functionName = function(param1, param2, paramN) {}
udddd

49. To write a line to the current element of the DOM (Document Object Model)
document.writeln("Text Here") //Advances to new line after text
Math.floor(number)
document.getElementById("listId").value;
Math.sqrt(number)

50. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
Underscores
prompt("Text Here")
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Math.max(var1, var2, varN)