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 that has been rounded to the closes integer value
document.getElementById("TextBoxId").value;
focus
Math.round(number)
var functionName = function(param1, param2, paramN) {}

2. A statement that yields a value
expression
confirm("Message Text Here")
\
document.getElementById("TextBoxId").disabled = true;

3. To set focus on the control for textboxes
getFullYear()
"
\
document.getElementById("TextBoxId").focus;

4. String object method used to get the character at a specified index position
window.onload = function() {//actions here}
charAt(position)
document.write("Text Here") //Remains on current line
===

5. Number object method used to return a number in exponential format with the specified number of decimal places
toExponential(digits)
toFixed(digitCount)
document.getElementById("ButtonId").onclick = functionName;
<noscript>

6. To create a single line comment in JavaScript
toDateString()
confirm()
charAt(position)
Two forward slashes "//"

7. To assign the return value of confirm() to a variable
toExponential(digits)
n
concat(var1, var2, varN)
var answerVar = confirm("Message Text Here")

8. To set the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked = true; //Could also be false
toString()
isNaN(varHere) //Returns true or false.
toDateString()

9. JavaScript is case _______
document.getElementById("TextBoxId").focus;
Multi line
sensitive
!==

10. To alter the value of the text element in a span tag
isNaN(varHere) //Returns true or false.
document.getElementById("spanId").firstChild.nodeValue = "New Value";
document.writeln("Text Here") //Advances to new line after text
v

11. Math object method used to return the square root of a given number
!==
r
Math.sqrt(number)
redeclare

12. Date object method used to return a string containing the date and time
window.location = "New Web Address Here";
toString()
toDateString()
substring(startIndex, stopIndex)

13. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
var dateObject = new Date("11/22/2012 18:25:35")
focus
string

14. To set the current checked status of the control for checkboxes
charAt(position)
prompt("Text Here")
standard equality operators
document.getElementById("CheckboxId").checked = true; //Could also be false

15. To display a confirmation
document.getElementById("checkboxId").checked;
confirm("Message Text Here")
Objects
\

16. 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

17. String object method used to return a new string that contains part of the original string from the specified start position
var functionName = function(param1, param2, paramN) {}
(Condition_Expression) ? Value_If_True : Value_If_False;
substring(startIndex)
var functionName = function(param1, param2, paramN) {}

18. To assign the value from a prompt to a non-string variable
document.getElementById("TextBoxId").value;
substring(startIndex)
n
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

19. The string escape sequence to insert a tab in JavaScript
sensitive
<noscript>
t
Two forward slashes "//"

20. String object method used to return the position of the first instance of a specified search string starting from the specified index
Math.sqrt(number)
indexOf(searchValue, startPosition)
document.getElementById("radioButtonId").checked = true; //Could also be false
toString(base)

21. To code a for statement in JavaScript
toString()
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("TextBoxId").focus;
for (counter; condition; incrementor) {}

22. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Math.round(number)
window.onload = function() {//actions here}
toFixed(digits)
getFullYear()

23. Date object method used to return a string containing the date
toDateString()
document.getElementById("spanId").firstChild;
Math.abs(number)
toExponential(digits)

24. What String object method returns a new string containing the value of the original string but in all lower case
toPrecision(precision)
toUpperCase()
r
toLowerCase()

25. The string escape sequence to insert a vertical tab in JavaScript
v
toExponential(digits)
\
var functionName = function(param1, param2, paramN) {}

26. Math object method used to return a given number raised to a given power
Math.pow(number, power)
substring(startIndex)
document.getElementById("TextBoxId").value;
var functionName = function(param1, param2, paramN) {}

27. To get the current checked status of the control for checkboxes
document.getElementById("spanId").firstChild;
Math.abs(number)
Multi line
document.getElementById("checkboxId").checked;

28. To denote a string in JavaScript
toDateString()
Objects
confirm("Message Text Here")
Either single or double quotes surrounding the data

29. The string escape sequence to start a new line in JavaScript
toExponential(digits)
n
Use the second parameter. Example: prompt("Enter Age:", "18")
Number.NEGATIVE_INFINITY

30. When you add a string and a number the result will be a ____
Math.max(var1, var2, varN)
string
toFixed(digits)
window.location()

31. To get the current value for textboxes
"
string
Math.ceil(number)
document.getElementById("TextBoxId").value;

32. To assign a default value to a prompt
confirm()
===
(Condition_Expression) ? Value_If_True : Value_If_False;
Use the second parameter. Example: prompt("Enter Age:", "18")

33. To make the browser load a new page using JavaScript
focus
Underscores
window.location = "New Web Address Here";
document.writeln("Text Here") //Advances to new line after text

34. A _______ variable can be changed and accessed from within and without a function or object.
!==
toFixed(digitCount)
global
Math.pow(number, power)

35. Command to display a prompt
toTimeString()
Objects
prompt("Text Here")
document.getElementById("ButtonId").onclick = functionName;

36. To insert Javascript into a web page
toDateString()
<script type="text/javascript">.....</script>
alert("Alert Text Here")
document.getElementById("CheckboxId").checked = true; //Could also be false

37. The string escape sequence to insert a carriage return in JavaScript
<script type="text/javascript">.....</script>
isNaN(varHere) //Returns true or false.
Math.min(var1, var2, varN)
r

38. The string escape sequence to insert a backslash in JavaScript
Math.round(number)
\
\
document.getElementById("radioButtonId").checked = true; //Could also be false

39. The syntax of a conditional operator
document.getElementById("checkboxId").value;
(Condition_Expression) ? Value_If_True : Value_If_False;
var stringVar = prompt("Text Here")
Math.min(var1, var2, varN)

40. Unlike ________________ identity operators do not perform type coercion.
standard equality operators
toUpperCase()
toString(base)
document.getElementById("textAreaId").value = "Text Value";

41. The four attributes of the <script> tag:Type - Src - _____ and Defer
focus
Charset
document.getElementById("TextBoxId").disabled = true;
Math.sqrt(number)

42. To get the current checked status of the control for radio buttons
getTime()
document.getElementById("radioButtonId").checked;
charAt(position)
confirm()

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

44. To set the current value of the control for a text area
getFullYear()
Math.min(var1, var2, varN)
confirm()
document.getElementById("textAreaId").value = "Text Value";

45. Math object method used to return a random number
Math.random() //Returns a value >= 0.0 but <1.0
toLowerCase()
getFullYear()
var variableName;

46. The string escape sequence to insert a form feed in JavaScript
udddd
f
var variableName;
Multi line

47. Number object method used to round numbers to the specified number of decimal places
Math.min(var1, var2, varN)
if (condition) {}
isNaN(varHere) //Returns true or false.
toFixed(digits)

48. This returns only True or false values
if (condition) {}
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.max(var1, var2, varN)
confirm()

49. To write a line to the current element of the DOM (Document Object Model)
document.getElementById("ButtonId").onclick = functionName;
Math.abs(number)
!==
document.writeln("Text Here") //Advances to new line after text

50. Number object method used to return a string with a given number base
udddd
toString(base)
string
document.getElementById("spanId").firstChild;