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 vertical tab in JavaScript
v
document.getElementById("TextBoxId").value;
string
Charset

2. To make the browser load a new page using JavaScript
for (counter; condition; incrementor) {}
v
window.location = "New Web Address Here";
var answerVar = confirm("Message Text Here")

3. To access a page element by id
Src - e.g. <script src="fileName.js"> //
toUpperCase()
document.getElementById("listId").value;
document.getElementById(id)

4. Number object method used to return a numerical string with the specified number of significant digits
toPrecision(precision)
Math.round(number)
document.getElementById("radioButtonId").value;
document.getElementById("TextBoxId").value;

5. String object method used to concatenate multiple strings
semicolon ";"
concat(var1, var2, varN)
Underscores
standard equality operators

6. Unlike ________________ identity operators do not perform type coercion.
standard equality operators
toLowerCase()
Math.ceil(number)
Objects

7. To set the current checked status of the control for radio buttons
var answerVar = confirm("Message Text Here")
document.getElementById("radioButtonId").checked = true; //Could also be false
window.location()
n

8. Math object method used to return the absolute value of a given number
Math.min(var1, var2, varN)
v
Math.abs(number)
Either single or double quotes surrounding the data

9. To get the text value of the control for radio buttons
document.getElementById("checkboxId").value;
var functionName = function(param1, param2, paramN) {}
Either single or double quotes surrounding the data
charAt(position)

10. The string escape sequence to insert a backslash in JavaScript
\
var variableName;
document.getElementById("checkboxId").value;
Math.sqrt(number)

11. To view the current web address using JavaScript
document.getElementById("radioButtonId").checked = true; //Could also be false
r
document.getElementById("TextBoxId").disabled = true;
window.location()

12. To get the current checked status of the control for checkboxes
"
document.getElementById("checkboxId").checked;
Number.NEGATIVE_INFINITY
\

13. 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

14. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
global
Underscores
r
isNaN(varHere) //Returns true or false.

15. This returns only True or false values
confirm()
document.getElementById("checkboxId").value;
focus
charAt(position)

16. To assign actions to the window onLoad event
document.getElementById(id)
toExponential(digits)
window.onload = function() {//actions here}
var answerVar = confirm("Message Text Here")

17. The escape sequence used to insert a Unicode character into a string in JavaScript
t
var answerVar = confirm("Message Text Here")
udddd
document.getElementById("textAreaId").value = "Text Value";

18. Number object method used to round numbers to the specified number of decimal places
charAt(position)
'
sensitive
toFixed(digits)

19. The string escape sequence to insert a carriage return in JavaScript
while (condition) {}
"
Number.NEGATIVE_INFINITY
r

20. The string escape sequence to insert a double quote in JavaScript
prompt("Text Here")
var stringVar = "part 1:" + "part 2";
Use the second parameter. Example: prompt("Enter Age:", "18")
"

21. To denote a string in JavaScript
<script type="text/javascript">.....</script>
var dateVar = new Date()
Either single or double quotes surrounding the data
var answerVar = confirm("Message Text Here")

22. To set the control to be disabled for textboxes
indexOf(searchValue, startPosition)
document.getElementById("TextBoxId").disabled = true;
toString(base)
while (condition) {}

23. To create an Array object in JavaScript
var arrayVar = new Array()
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("TextBoxId").disabled = true;
t

24. Math object method used to return a given number raised to a given power
window.location = "New Web Address Here";
document.getElementById("textAreaId").value;
Math.pow(number, power)
concat(var1, var2, varN)

25. To get the current value of the control for a text area
document.getElementById("textAreaId").value;
"
substring(startIndex, stopIndex)
semicolon ";"

26. String object method used to return a new string that contains part of the original string from the specified start position
if (condition) {}
confirm("Message Text Here")
v
substring(startIndex)

27. To write a line to the current element of the DOM (Document Object Model)
substring(startIndex)
document.getElementById(id)
document.writeln("Text Here") //Advances to new line after text
toString(base)

28. To assign the return value of confirm() to a variable
standard equality operators
var answerVar = confirm("Message Text Here")
!==
window.onload = function() {//actions here}

29. To insert Javascript into a web page
Math.max(var1, var2, varN)
substring(startIndex, stopIndex)
document.write("Text Here") //Remains on current line
<script type="text/javascript">.....</script>

30. 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)
var dateObject = new Date("11/22/2012 18:25:35")
confirm("Message Text Here")
string

31. To get the text value of the control for radio buttons
document.getElementById(id)
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("radioButtonId").value;
n

32. To assign a default value to a prompt
var arrayVar = new Array()
for (counter; condition; incrementor) {}
expression
Use the second parameter. Example: prompt("Enter Age:", "18")

33. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
Two forward slashes "//"
substring(startIndex, stopIndex)
Objects
global

34. To code an If statement in JavaScript
Math.round(number)
standard equality operators
if (condition) {}
getFullYear()

35. Command to display a prompt
document.getElementById("spanId").firstChild.nodeValue = "New Value";
toFixed(digits)
===
prompt("Text Here")

36. Math object method used to return a given number rounded to the next highest integer value
var variableName;
document.getElementById("checkboxId").value;
'
Math.ceil(number)

37. To assign the value from a prompt to a string
document.getElementById("radioButtonId").checked = true; //Could also be false
getFullYear()
var stringVar = prompt("Text Here")
document.getElementById("checkboxId").value;

38. To set the current value of the control for a text area
while (condition) {}
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("radioButtonId").checked = true; //Could also be false
for (counter; condition; incrementor) {}

39. Number object method used to return a string with a given number base
Math.ceil(number)
toString(base)
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
<script type="text/javascript">.....</script>

40. To access the text element in a <span> tag
getTime()
Math.round(number)
document.getElementById("spanId").firstChild;
'

41. To get the current checked status of the control for radio buttons
Underscores
\
document.getElementById("spanId").firstChild;
document.getElementById("radioButtonId").checked;

42. To code a button.onclick event handler
toPrecision(precision)
\
var answerVar = confirm("Message Text Here")
document.getElementById("ButtonId").onclick = functionName;

43. What Date object method is used to return the number of milliseconds since the start of GMT
var variableName;
concat(var1, var2, varN)
getTime()
(Condition_Expression) ? Value_If_True : Value_If_False;

44. Number object method used to return a number in exponential format with the specified number of decimal places
Math.floor(number)
substring(startIndex)
toExponential(digits)
ondblclick

45. Math object method used to return a random number
toFixed(digits)
expression
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById(id)

46. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
var answerVar = confirm("Message Text Here")
getFullYear()
document.getElementById("textAreaId").value = "Text Value";

47. To create a function that returns a value in JavaScript
!==
var functionName = function(param1, param2, paramN) {}
indexOf(searchValue, startPosition)
Underscores

48. To display a confirmation
toFixed(digitCount)
confirm("Message Text Here")
document.getElementById("CheckboxId").checked = true; //Could also be false
document.writeln("Text Here") //Advances to new line after text

49. What String object method returns a new string containing the value of the original string but in all lower case
document.getElementById("checkboxId").value;
toString(base)
toLowerCase()
Objects

50. Math object method used to return the lowest value for a set of supplied numbers
Math.min(var1, var2, varN)
global
toFixed(digitCount)
isNaN(varHere) //Returns true or false.