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 string escape sequence to insert a backslash in JavaScript
document.getElementById("TextBoxId").disabled = true;
\
document.writeln("Text Here") //Advances to new line after text
var variableName;

2. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
document.getElementById("ButtonId").onclick = functionName;
toPrecision(precision)
Objects
ondblclick

3. The identity operator for not equal
!==
Math.ceil(number)
document.getElementById("radioButtonId").checked = true; //Could also be false
substring(startIndex)

4. To get the current checked status of the control for checkboxes
document.getElementById("checkboxId").checked;
document.getElementById("radioButtonId").checked = true; //Could also be false
Objects
var answerVar = confirm("Message Text Here")

5. Math object method used to return the absolute value of a given number
toExponential(digits)
Math.abs(number)
document.getElementById("listId").value;
document.getElementById("TextBoxId").focus;

6. To code a while statement in JavaScript
getFullYear()
while (condition) {}
getTime()
document.getElementById("radioButtonId").checked = true; //Could also be false

7. To create a function that returns a value in JavaScript
var functionName = function(param1, param2, paramN) {}
toExponential(digits)
getFullYear()
toPrecision(precision)

8. Date object method used to return a string containing the time
while (condition) {}
f
toTimeString()
t

9. To test that a variable contains a valid number
isNaN(varHere) //Returns true or false.
Two forward slashes "//"
event handler .
document.getElementById(id)

10. To concatenate multiple parts into a string
window.onload = function() {//actions here}
var stringVar = "part 1:" + "part 2";
document.getElementById("spanId").firstChild.nodeValue = "New Value";
global

11. To code a button.onclick event handler
redeclare
document.getElementById("ButtonId").onclick = functionName;
v
'

12. A statement that yields a value
sensitive
expression
Math.sqrt(number)
document.getElementById("textAreaId").value = "Text Value";

13. The string escape sequence to insert a vertical tab in JavaScript
toString()
Charset
v
!==

14. To declare a variable in JavaScript
document.getElementById("textAreaId").value = "Text Value";
var variableName;
document.getElementById("ButtonId").onclick = functionName;
expression

15. To create a function in JavaScript
toPrecision(precision)
var functionName = function(param1, param2, paramN) {}
Src - e.g. <script src="fileName.js"> //
Number.NEGATIVE_INFINITY

16. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
t
Objects
document.getElementById("radioButtonId").checked;
document.write("Text Here") //Remains on current line

17. To make the browser load a new page using JavaScript
sensitive
udddd
window.location = "New Web Address Here";
Math.pow(number, power)

18. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
getFullYear()
window.location()
toDateString()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

19. To set focus on the control for textboxes
while (condition) {}
document.getElementById("TextBoxId").focus;
expression
Math.floor(number)

20. To get the current checked status of the control for radio buttons
sensitive
document.getElementById("radioButtonId").checked;
toString(base)
Charset

21. Math object method used to return a given number rounded to the next highest integer value
var arrayVar = new Array()
Math.ceil(number)
substring(startIndex, stopIndex)
confirm("Message Text Here")

22. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild;
document.getElementById("spanId").firstChild.nodeValue = "New Value";
document.getElementById("textAreaId").value;
Either single or double quotes surrounding the data

23. To create a single line comment in JavaScript
toFixed(digitCount)
indexOf(searchValue, startPosition)
Two forward slashes "//"
document.getElementById("radioButtonId").checked = true; //Could also be false

24. The format to create a new Date object from a string
var dateObject = new Date("11/22/2012 18:25:35")
document.getElementById("textAreaId").value;
toUpperCase()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

25. Math object method used to return the highest value from a set of supplied numbers
while (condition) {}
Math.max(var1, var2, varN)
toString()
getFullYear()

26. String object method used to return the position of the first instance of a specified search string starting from the specified index
document.getElementById("checkboxId").value;
indexOf(searchValue, startPosition)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
confirm()

27. Date object method used to return a string containing the date
document.getElementById("TextBoxId").focus;
alert("Alert Text Here")
toPrecision(precision)
toDateString()

28. To get the current value of the control for a text area
"
document.getElementById("textAreaId").value;
standard equality operators
getFullYear()

29. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
<script type="text/javascript">.....</script>
focus
alert("Alert Text Here")
Underscores

30. To code an If statement in JavaScript
var dateObject = new Date("11/22/2012 18:25:35")
toLowerCase()
if (condition) {}
Math.max(var1, var2, varN)

31. The string escape sequence to insert a form feed in JavaScript
f
expression
document.getElementById("TextBoxId").value;
Two forward slashes "//"

32. The string escape sequence to start a new line in JavaScript
(Condition_Expression) ? Value_If_True : Value_If_False;
Number.NEGATIVE_INFINITY
n
substring(startIndex, stopIndex)

33. To code a for statement in JavaScript
for (counter; condition; incrementor) {}
Two forward slashes "//"
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
getFullYear()

34. To view the current web address using JavaScript
confirm("Message Text Here")
window.location()
document.getElementById("spanId").firstChild.nodeValue = "New Value";
global

35. When you add a string and a number the result will be a ____
expression
indexOf(searchValue, startPosition)
document.getElementById("CheckboxId").checked = true; //Could also be false
string

36. What Date object method is used to return the number of milliseconds since the start of GMT
document.getElementById("TextBoxId").disabled = true;
getTime()
window.location = "New Web Address Here";
document.getElementById("checkboxId").value;

37. ________ comments start with / and end with /.
udddd
confirm("Message Text Here")
Multi line
window.location = "New Web Address Here";

38. To display a confirmation
Multi line
document.getElementById("TextBoxId").disabled = true;
confirm("Message Text Here")
focus

39. Math object method used to return a random number
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("checkboxId").value;
Multi line
isNaN(varHere) //Returns true or false.

40. Number object method used to return a number in exponential format with the specified number of decimal places
standard equality operators
Use the second parameter. Example: prompt("Enter Age:", "18")
var dateObject = new Date("11/22/2012 18:25:35")
toExponential(digits)

41. To assign the value from a prompt to a non-string variable
var dateVar = new Date()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
document.getElementById("checkboxId").value;
window.location = "New Web Address Here";

42. 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 = "part 1:" + "part 2";
substring(startIndex, stopIndex)
var functionName = function(param1, param2, paramN) {}
document.getElementById("TextBoxId").value;

43. A _______ variable can be changed and accessed from within and without a function or object.
\
global
while (condition) {}
var answerVar = confirm("Message Text Here")

44. To create a new Date object
event handler .
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("radioButtonId").value;
document.getElementById("ButtonId").onclick = functionName;

45. 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

46. To insert Javascript into a web page
Math.pow(number, power)
indexOf(searchValue, startPosition)
<script type="text/javascript">.....</script>
Src - e.g. <script src="fileName.js"> //

47. When you __________ a javascript variable it retains its original value
toFixed(digits)
redeclare
for (counter; condition; incrementor) {}
window.location()

48. Math object method used to return a given number rounded to the next lowest integer value
document.getElementById("ButtonId").onclick = functionName;
getFullYear()
Math.floor(number)
semicolon ";"

49. To get the value or the currently selected item for lists
document.getElementById("TextBoxId").value;
document.write("Text Here") //Remains on current line
event handler .
document.getElementById("listId").value;

50. What String object method returns a new string containing the value of the original string but in all upper case
(Condition_Expression) ? Value_If_True : Value_If_False;
document.writeln("Text Here") //Advances to new line after text
document.getElementById("radioButtonId").checked = true; //Could also be false
toUpperCase()