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 tab in JavaScript
document.write("Text Here") //Remains on current line
t
document.getElementById("checkboxId").value;
udddd

2. To create a function that returns a value in JavaScript
'
var functionName = function(param1, param2, paramN) {}
document.getElementById("spanId").firstChild;
getTime()

3. 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)
(Condition_Expression) ? Value_If_True : Value_If_False;
r
toUpperCase()

4. The string escape sequence to start a new line in JavaScript
standard equality operators
n
var answerVar = confirm("Message Text Here")
getFullYear()

5. Number object method used to return a numerical string with the specified number of significant digits
Objects
var answerVar = confirm("Message Text Here")
toFixed(digitCount)
toPrecision(precision)

6. To set the control to be disabled for textboxes
var stringVar = prompt("Text Here")
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("TextBoxId").disabled = true;
toDateString()

7. The syntax of a conditional operator
(Condition_Expression) ? Value_If_True : Value_If_False;
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Src - e.g. <script src="fileName.js"> //
expression

8. To code a while statement in JavaScript
while (condition) {}
Src - e.g. <script src="fileName.js"> //
Two forward slashes "//"
'

9. To declare a variable in JavaScript
toLowerCase()
toFixed(digits)
document.getElementById("TextBoxId").value;
var variableName;

10. Math object method used to return a given number rounded to the next highest integer value
concat(var1, var2, varN)
Math.round(number)
Math.ceil(number)
document.getElementById("radioButtonId").value;

11. To write text to the current element of the DOM
Multi line
Math.abs(number)
substring(startIndex)
document.write("Text Here") //Remains on current line

12. Math object method used to return a given number rounded to the next lowest integer value
document.getElementById("TextBoxId").disabled = true;
document.getElementById("textAreaId").value = "Text Value";
var dateObject = new Date("11/22/2012 18:25:35")
Math.floor(number)

13. Statements end in JavaScript with a ________
redeclare
Math.round(number)
Number.NEGATIVE_INFINITY
semicolon ";"

14. To set the current value of the control for a text area
document.getElementById("TextBoxId").focus;
document.getElementById("textAreaId").value = "Text Value";
ondblclick
semicolon ";"

15. Date object method used to return a string containing the time
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
toTimeString()
document.getElementById("TextBoxId").disabled = true;
document.getElementById("radioButtonId").checked = true; //Could also be false

16. A statement that yields a value
expression
global
toTimeString()
for (counter; condition; incrementor) {}

17. 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
<noscript>
Math.floor(number)
substring(startIndex, stopIndex)
Math.ceil(number)

18. When you __________ a javascript variable it retains its original value
window.location = "New Web Address Here";
Math.sqrt(number)
toFixed(digits)
redeclare

19. To get the value or the currently selected item for lists
udddd
document.getElementById("listId").value;
Math.sqrt(number)
Charset

20. Math object method used to return the square root of a given number
Underscores
Math.sqrt(number)
toPrecision(precision)
confirm()

21. To view the current web address using JavaScript
isNaN(varHere) //Returns true or false.
substring(startIndex)
toString()
window.location()

22. To get the current value for textboxes
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("TextBoxId").value;
toDateString()
sensitive

23. To insert Javascript into a web page
Math.floor(number)
var dateObject = new Date("11/22/2012 18:25:35")
<script type="text/javascript">.....</script>
charAt(position)

24. To create a Date object in JavaScript
var functionName = function(param1, param2, paramN) {}
Math.round(number)
Math.floor(number)
var dateVar = new Date()

25. To assign actions to the window onLoad event
!==
window.onload = function() {//actions here}
document.getElementById("checkboxId").value;
document.writeln("Text Here") //Advances to new line after text

26. What String object method returns a new string containing the value of the original string but in all lower case
document.getElementById("checkboxId").checked;
toUpperCase()
toLowerCase()
Two forward slashes "//"

27. To get the current checked status of the control for checkboxes
Math.abs(number)
document.getElementById("checkboxId").checked;
getFullYear()
document.getElementById("radioButtonId").checked;

28. What Date object method is used to return the number of milliseconds since the start of GMT
Math.pow(number, power)
document.getElementById("radioButtonId").checked;
substring(startIndex)
getTime()

29. To create a function in JavaScript
indexOf(searchValue, startPosition)
var functionName = function(param1, param2, paramN) {}
"
window.onload = function() {//actions here}

30. When you add a string and a number the result will be a ____
string
n
global
var dateVar = new Date()

31. The string escape sequence to insert a backslash in JavaScript
var functionName = function(param1, param2, paramN) {}
Src - e.g. <script src="fileName.js"> //
\
while (condition) {}

32. The string escape sequence to insert a double quote in JavaScript
document.getElementById("ButtonId").onclick = functionName;
"
n
Either single or double quotes surrounding the data

33. The _____ attribute is used to denote external file for script use
Src - e.g. <script src="fileName.js"> //
confirm("Message Text Here")
var variableName;
document.getElementById("textAreaId").value;

34. To display an alert
alert("Alert Text Here")
Math.min(var1, var2, varN)
setMilliseconds()
var stringVar = "part 1:" + "part 2";

35. To get the text value of the control for radio buttons
document.getElementById("ButtonId").onclick = functionName;
document.getElementById("checkboxId").value;
v
charAt(position)

36. Math object method used to return the absolute value of a given number
Math.abs(number)
var functionName = function(param1, param2, paramN) {}
substring(startIndex)
toString()

37. Unlike ________________ identity operators do not perform type coercion.
document.getElementById("TextBoxId").value;
Multi line
setMilliseconds()
standard equality operators

38. Math object method used to return a given number raised to a given power
var stringVar = prompt("Text Here")
\
string
Math.pow(number, power)

39. Number object method used to return a number in exponential format with the specified number of decimal places
toExponential(digits)
document.getElementById("textAreaId").value = "Text Value";
Math.ceil(number)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

40. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
document.getElementById("TextBoxId").value;
Number.NEGATIVE_INFINITY
setMilliseconds()
window.onload = function() {//actions here}

41. Math object method used to return a given number that has been rounded to the closes integer value
if (condition) {}
Math.round(number)
Math.abs(number)
document.getElementById("ButtonId").onclick = functionName;

42. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
f
getFullYear()
ondblclick
\

43. To code an If statement in JavaScript
document.getElementById("TextBoxId").value;
if (condition) {}
toExponential(digits)
r

44. String object method used to return a new string that contains part of the original string from the specified start position
document.getElementById("TextBoxId").disabled = true;
substring(startIndex)
prompt("Text Here")
===

45. The escape sequence used to insert a Unicode character into a string in JavaScript
confirm("Message Text Here")
udddd
var answerVar = confirm("Message Text Here")
Src - e.g. <script src="fileName.js"> //

46. Math object method used to return a random number
<script type="text/javascript">.....</script>
document.getElementById(id)
Math.random() //Returns a value >= 0.0 but <1.0
toUpperCase()

47. To make the browser load a new page using JavaScript
confirm("Message Text Here")
Underscores
window.location = "New Web Address Here";
toUpperCase()

48. To write a line to the current element of the DOM (Document Object Model)
toUpperCase()
substring(startIndex, stopIndex)
document.writeln("Text Here") //Advances to new line after text
(Condition_Expression) ? Value_If_True : Value_If_False;

49. To access the text element in a <span> tag
document.getElementById("radioButtonId").value;
Math.sqrt(number)
document.getElementById("spanId").firstChild;
Use the second parameter. Example: prompt("Enter Age:", "18")

50. What String object method returns a new string containing the value of the original string but in all upper case
document.getElementById("spanId").firstChild.nodeValue = "New Value";
'
concat(var1, var2, varN)
toUpperCase()