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. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
semicolon ";"
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Underscores
document.getElementById("radioButtonId").checked = true; //Could also be false

2. To make the browser load a new page using JavaScript
===
window.location = "New Web Address Here";
while (condition) {}
(Condition_Expression) ? Value_If_True : Value_If_False;

3. To get the current value for textboxes
Either single or double quotes surrounding the data
document.getElementById("TextBoxId").value;
(Condition_Expression) ? Value_If_True : Value_If_False;
confirm()

4. Math object method used to return the lowest value for a set of supplied numbers
Math.min(var1, var2, varN)
\
document.getElementById("radioButtonId").value;
===

5. What String object method returns a new string containing the value of the original string but in all upper case
document.getElementById("radioButtonId").checked;
toUpperCase()
confirm()
document.getElementById("spanId").firstChild.nodeValue = "New Value";

6. What String object method returns a new string containing the value of the original string but in all lower case
document.getElementById("radioButtonId").value;
udddd
toLowerCase()
===

7. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
event handler .
focus
document.write("Text Here") //Remains on current line
<noscript>

8. String object method used to return a new string that contains part of the original string from the specified start position
'
substring(startIndex)
var variableName;
t

9. The format to create a new Date object from a string
redeclare
var dateObject = new Date("11/22/2012 18:25:35")
document.getElementById("radioButtonId").checked = true; //Could also be false
var arrayVar = new Array()

10. JavaScript is case _______
r
sensitive
'
Math.min(var1, var2, varN)

11. To set the current checked status of the control for checkboxes
document.getElementById("CheckboxId").checked = true; //Could also be false
redeclare
document.write("Text Here") //Remains on current line
charAt(position)

12. To assign the value from a prompt to a non-string variable
ondblclick
setMilliseconds()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toExponential(digits)

13. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
toUpperCase()
event handler .
getFullYear()
f

14. To get the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked;
toFixed(digitCount)
toFixed(digits)
document.getElementById("listId").value;

15. To code a for statement in JavaScript
redeclare
while (condition) {}
document.getElementById("radioButtonId").checked = true; //Could also be false
for (counter; condition; incrementor) {}

16. To set focus on the control for textboxes
document.getElementById("TextBoxId").focus;
focus
document.getElementById("ButtonId").onclick = functionName;
toTimeString()

17. To get the text value of the control for radio buttons
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("radioButtonId").checked = true; //Could also be false
var arrayVar = new Array()
document.getElementById("checkboxId").value;

18. The string escape sequence to start a new line in JavaScript
toDateString()
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("radioButtonId").checked;
n

19. To code a while statement in JavaScript
document.getElementById("ButtonId").onclick = functionName;
toString()
while (condition) {}
toTimeString()

20. To create a new Date object
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("TextBoxId").focus;
Math.round(number)
window.location()

21. To create a single line comment in JavaScript
Two forward slashes "//"
document.getElementById("CheckboxId").checked = true; //Could also be false
f
document.getElementById("radioButtonId").value;

22. To create an Array object in JavaScript
var arrayVar = new Array()
Either single or double quotes surrounding the data
substring(startIndex)
focus

23. The identity operator for not equal
!==
f
alert("Alert Text Here")
document.getElementById("TextBoxId").focus;

24. To write a line to the current element of the DOM (Document Object Model)
document.writeln("Text Here") //Advances to new line after text
global
ondblclick
for (counter; condition; incrementor) {}

25. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
event handler .
indexOf(searchValue, startPosition)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
var dateVar = new Date()

26. Math object method used to return the highest value from a set of supplied numbers
<noscript>
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.max(var1, var2, varN)
confirm("Message Text Here")

27. What Date object method is used to return the number of milliseconds since the start of GMT
Math.sqrt(number)
document.getElementById(id)
document.getElementById("CheckboxId").checked = true; //Could also be false
getTime()

28. To set the current checked status of the control for radio buttons
Math.round(number)
string
document.getElementById("spanId").firstChild;
document.getElementById("radioButtonId").checked = true; //Could also be false

29. Date object method used to return a string containing the date
toDateString()
!==
document.getElementById("radioButtonId").checked;
ondblclick

30. When you __________ a javascript variable it retains its original value
focus
redeclare
var dateObject = new Date("11/22/2012 18:25:35")
document.getElementById("CheckboxId").checked = true; //Could also be false

31. To insert Javascript into a web page
document.getElementById(id)
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.max(var1, var2, varN)
<script type="text/javascript">.....</script>

32. To write text to the current element of the DOM
window.location()
document.write("Text Here") //Remains on current line
focus
document.getElementById("spanId").firstChild;

33. The escape sequence used to insert a Unicode character into a string in JavaScript
focus
Multi line
udddd
document.getElementById(id)

34. Number object method used to return a numerical string with the specified number of significant digits
v
document.getElementById("textAreaId").value;
Math.sqrt(number)
toPrecision(precision)

35. To access a page element by id
document.getElementById("spanId").firstChild;
document.getElementById("radioButtonId").checked;
document.getElementById(id)
isNaN(varHere) //Returns true or false.

36. Number object method used to round numbers to the specified number of decimal places
toFixed(digits)
document.getElementById(id)
n
toFixed(digitCount)

37. To assign actions to the window onLoad event
setMilliseconds()
window.onload = function() {//actions here}
Math.round(number)
var answerVar = confirm("Message Text Here")

38. To get the current value of the control for a text area
Math.round(number)
document.getElementById("textAreaId").value;
var functionName = function(param1, param2, paramN) {}
sensitive

39. String object method used to concatenate multiple strings
document.getElementById("radioButtonId").value;
document.getElementById("spanId").firstChild;
Math.round(number)
concat(var1, var2, varN)

40. String object method used to get the character at a specified index position
toTimeString()
'
Number.NEGATIVE_INFINITY
charAt(position)

41. To create a Date object in JavaScript
Math.abs(number)
var dateVar = new Date()
var dateObject = new Date("11/22/2012 18:25:35")
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

42. 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

43. To test that a variable contains a valid number
isNaN(varHere) //Returns true or false.
prompt("Text Here")
document.getElementById("radioButtonId").checked = true; //Could also be false
var stringVar = prompt("Text Here")

44. To denote a string in JavaScript
document.writeln("Text Here") //Advances to new line after text
toTimeString()
getFullYear()
Either single or double quotes surrounding the data

45. To get the current checked status of the control for checkboxes
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("radioButtonId").checked;
alert("Alert Text Here")
document.getElementById("checkboxId").checked;

46. To set the digit precision of a decimal number
toFixed(digitCount)
while (condition) {}
standard equality operators
v

47. The string escape sequence to insert a carriage return in JavaScript
getFullYear()
"
r
for (counter; condition; incrementor) {}

48. The string escape sequence to insert a double quote in JavaScript
window.location = "New Web Address Here";
\
"
Objects

49. To assign a default value to a prompt
global
isNaN(varHere) //Returns true or false.
Use the second parameter. Example: prompt("Enter Age:", "18")
Math.min(var1, var2, varN)

50. ________ comments start with / and end with /.
Multi line
isNaN(varHere) //Returns true or false.
document.getElementById("TextBoxId").disabled = true;
udddd