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 a given number rounded to the next highest integer value
event handler .
Math.ceil(number)
var variableName;
(Condition_Expression) ? Value_If_True : Value_If_False;

2. The syntax of a conditional operator
Math.abs(number)
document.getElementById("checkboxId").checked;
confirm("Message Text Here")
(Condition_Expression) ? Value_If_True : Value_If_False;

3. Number object method used to return a string with a given number base
toString(base)
Math.pow(number, power)
var variableName;
redeclare

4. To create a single line comment in JavaScript
event handler .
window.location()
Src - e.g. <script src="fileName.js"> //
Two forward slashes "//"

5. To access a page element by id
document.writeln("Text Here") //Advances to new line after text
document.getElementById(id)
semicolon ";"
confirm()

6. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
standard equality operators
Math.floor(number)

7. The string escape sequence to start a new line in JavaScript
Use the second parameter. Example: prompt("Enter Age:", "18")
n
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.sqrt(number)

8. The format to create a new Date object from a string
var dateObject = new Date("11/22/2012 18:25:35")
<script type="text/javascript">.....</script>
for (counter; condition; incrementor) {}
\

9. Command to display a prompt
prompt("Text Here")
Src - e.g. <script src="fileName.js"> //
===
n

10. Math object method used to return a random number
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("spanId").firstChild;
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("spanId").firstChild.nodeValue = "New Value";

11. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
var stringVar = "part 1:" + "part 2";
r
ondblclick
document.getElementById("CheckboxId").checked = true; //Could also be false

12. JavaScript is case _______
toLowerCase()
toString()
Math.random() //Returns a value >= 0.0 but <1.0
sensitive

13. What Date object method is used to return the number of milliseconds since the start of GMT
getTime()
redeclare
'
document.getElementById("textAreaId").value;

14. The string escape sequence to insert a carriage return in JavaScript
standard equality operators
r
expression
Number.NEGATIVE_INFINITY

15. A statement that yields a value
toFixed(digits)
Underscores
Math.ceil(number)
expression

16. To insert Javascript into a web page
substring(startIndex)
<script type="text/javascript">.....</script>
Use the second parameter. Example: prompt("Enter Age:", "18")
window.onload = function() {//actions here}

17. To display an alert
document.write("Text Here") //Remains on current line
alert("Alert Text Here")
window.location = "New Web Address Here";
semicolon ";"

18. To code a button.onclick event handler
document.getElementById("radioButtonId").checked;
substring(startIndex)
document.getElementById("ButtonId").onclick = functionName;
n

19. To get the current value of the control for a text area
document.getElementById("textAreaId").value = "Text Value";
window.onload = function() {//actions here}
Math.sqrt(number)
document.getElementById("textAreaId").value;

20. To write a line to the current element of the DOM (Document Object Model)
document.writeln("Text Here") //Advances to new line after text
document.getElementById("TextBoxId").value;
semicolon ";"
Math.round(number)

21. To assign a default value to a prompt
Use the second parameter. Example: prompt("Enter Age:", "18")
document.getElementById("textAreaId").value;
window.onload = function() {//actions here}
var dateObject = new Date("11/22/2012 18:25:35")

22. To code a for statement in JavaScript
for (counter; condition; incrementor) {}
n
concat(var1, var2, varN)
Number.NEGATIVE_INFINITY

23. 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

24. A _______ variable can be changed and accessed from within and without a function or object.
prompt("Text Here")
document.getElementById(id)
Multi line
global

25. To set focus on the control for textboxes
document.getElementById("TextBoxId").value;
document.getElementById("TextBoxId").focus;
Math.ceil(number)
standard equality operators

26. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.round(number)
Multi line
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

27. To code an If statement in JavaScript
expression
if (condition) {}
r
!==

28. To denote a string in JavaScript
Either single or double quotes surrounding the data
document.getElementById("textAreaId").value;
setMilliseconds()
for (counter; condition; incrementor) {}

29. Math object method used to return the lowest value for a set of supplied numbers
toString(base)
Objects
Math.min(var1, var2, varN)
document.getElementById("TextBoxId").value;

30. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
document.getElementById(id)
confirm("Message Text Here")
focus
setMilliseconds()

31. The identity operator for not equal
confirm("Message Text Here")
t
!==
expression

32. 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)
===
Math.random() //Returns a value >= 0.0 but <1.0
var variableName;

33. To set the current checked status of the control for radio buttons
toDateString()
Two forward slashes "//"
document.getElementById("TextBoxId").focus;
document.getElementById("radioButtonId").checked = true; //Could also be false

34. The string escape sequence to insert a backslash in JavaScript
string
\
Objects
var dateObject = new Date("11/22/2012 18:25:35")

35. To display a confirmation
Math.max(var1, var2, varN)
<script type="text/javascript">.....</script>
confirm("Message Text Here")
window.location = "New Web Address Here";

36. The string escape sequence to insert a vertical tab in JavaScript
toExponential(digits)
v
standard equality operators
var arrayVar = new Array()

37. To view the current web address using JavaScript
window.location()
isNaN(varHere) //Returns true or false.
var arrayVar = new Array()
document.getElementById("textAreaId").value = "Text Value";

38. The string escape sequence to insert a form feed in JavaScript
concat(var1, var2, varN)
f
Two forward slashes "//"
toFixed(digitCount)

39. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
substring(startIndex, stopIndex)
indexOf(searchValue, startPosition)

40. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
document.getElementById("radioButtonId").checked;
sensitive
var functionName = function(param1, param2, paramN) {}

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)
document.getElementById("textAreaId").value;
document.getElementById("checkboxId").checked;
concat(var1, var2, varN)

42. To get the current value for textboxes
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
document.getElementById("TextBoxId").value;
substring(startIndex, stopIndex)
Charset

43. To declare a variable in JavaScript
===
document.getElementById("TextBoxId").focus;
var variableName;
concat(var1, var2, varN)

44. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
var functionName = function(param1, param2, paramN) {}
event handler .
r
document.getElementById("spanId").firstChild;

45. To create a new Date object
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
toDateString()
focus
document.getElementById("spanId").firstChild;

46. Date object method used to return a string containing the date
toDateString()
sensitive
var stringVar = "part 1:" + "part 2";
concat(var1, var2, varN)

47. The identity operator for equals
===
document.getElementById("textAreaId").value = "Text Value";
toFixed(digits)
Number.NEGATIVE_INFINITY

48. To set the digit precision of a decimal number
toPrecision(precision)
document.getElementById("spanId").firstChild.nodeValue = "New Value";
toFixed(digitCount)
prompt("Text Here")

49. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
document.getElementById("TextBoxId").focus;
Objects
udddd
document.getElementById("ButtonId").onclick = functionName;

50. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
var variableName;
prompt("Text Here")
Underscores
n