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. To declare a variable in JavaScript
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
var variableName;
Math.pow(number, power)
<noscript>

2. The string escape sequence to insert a tab in JavaScript
document.getElementById("listId").value;
t
<noscript>
confirm()

3. To set the control to be disabled for textboxes
confirm()
document.getElementById("TextBoxId").disabled = true;
window.onload = function() {//actions here}
document.getElementById("spanId").firstChild;

4. To display a confirmation
r
sensitive
confirm("Message Text Here")
toString()

5. The string escape sequence to start a new line in JavaScript
Math.abs(number)
substring(startIndex)
for (counter; condition; incrementor) {}
n

6. The string escape sequence to insert a backslash in JavaScript
\
Math.max(var1, var2, varN)
Two forward slashes "//"
Math.random() //Returns a value >= 0.0 but <1.0

7. To set the current checked status of the control for checkboxes
prompt("Text Here")
document.getElementById("CheckboxId").checked = true; //Could also be false
===
Either single or double quotes surrounding the data

8. To concatenate multiple parts into a string
var stringVar = "part 1:" + "part 2";
(Condition_Expression) ? Value_If_True : Value_If_False;
redeclare
document.getElementById("radioButtonId").checked = true; //Could also be false

9. To code an If statement in JavaScript
if (condition) {}
for (counter; condition; incrementor) {}
document.getElementById("textAreaId").value;
var dateVar = new Date()

10. Date object method used to return a string containing the date and time
toExponential(digits)
substring(startIndex)
toString()
Math.pow(number, power)

11. Number object method used to return a string with a given number base
Math.pow(number, power)
<noscript>
toString(base)
document.getElementById("TextBoxId").focus;

12. 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)
isNaN(varHere) //Returns true or false.
ondblclick
prompt("Text Here")

13. Math object method used to return a given number raised to a given power
var functionName = function(param1, param2, paramN) {}
Math.pow(number, power)
toFixed(digitCount)
document.getElementById("spanId").firstChild;

14. Math object method used to return a given number that has been rounded to the closes integer value
var functionName = function(param1, param2, paramN) {}
setMilliseconds()
var answerVar = confirm("Message Text Here")
Math.round(number)

15. To assign a default value to a prompt
Math.min(var1, var2, varN)
Use the second parameter. Example: prompt("Enter Age:", "18")
expression
document.getElementById("TextBoxId").value;

16. To alter the value of the text element in a span tag
document.getElementById("TextBoxId").disabled = true;
Underscores
document.getElementById("listId").value;
document.getElementById("spanId").firstChild.nodeValue = "New Value";

17. To get the value or the currently selected item for lists
document.getElementById("listId").value;
alert("Alert Text Here")
expression
toFixed(digits)

18. To set the current value of the control for a text area
getFullYear()
toFixed(digits)
document.getElementById("textAreaId").value = "Text Value";
while (condition) {}

19. The four attributes of the <script> tag:Type - Src - _____ and Defer
Math.ceil(number)
Charset
toFixed(digitCount)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

20. The string escape sequence to insert a carriage return in JavaScript
r
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Src - e.g. <script src="fileName.js"> //
Math.round(number)

21. Math object method used to return the lowest value for a set of supplied numbers
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.min(var1, var2, varN)
confirm("Message Text Here")
Multi line

22. To get the current value of the control for a text area
Math.max(var1, var2, varN)
semicolon ";"
document.getElementById("textAreaId").value;
"

23. The string escape sequence to insert a double quote in JavaScript
t
Math.sqrt(number)
document.writeln("Text Here") //Advances to new line after text
"

24. To set focus on the control for textboxes
document.getElementById("TextBoxId").focus;
standard equality operators
toUpperCase()
document.getElementById("radioButtonId").checked = true; //Could also be false

25. To get the current value for textboxes
document.getElementById("ButtonId").onclick = functionName;
redeclare
global
document.getElementById("TextBoxId").value;

26. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
event handler .
document.getElementById("TextBoxId").value;
Math.abs(number)
toLowerCase()

27. Statements end in JavaScript with a ________
udddd
v
semicolon ";"
ondblclick

28. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Number.NEGATIVE_INFINITY
document.getElementById("checkboxId").checked;
semicolon ";"
getFullYear()

29. JavaScript is case _______
sensitive
t
if (condition) {}
Math.ceil(number)

30. String object method used to concatenate multiple strings
alert("Alert Text Here")
var dateObject = new Date("11/22/2012 18:25:35")
concat(var1, var2, varN)
Math.random() //Returns a value >= 0.0 but <1.0

31. To set the digit precision of a decimal number
toFixed(digitCount)
event handler .
prompt("Text Here")
Math.pow(number, power)

32. To assign the value from a prompt to a string
document.getElementById("ButtonId").onclick = functionName;
toString(base)
var stringVar = prompt("Text Here")
document.getElementById("textAreaId").value;

33. Math object method used to return the square root of a given number
document.write("Text Here") //Remains on current line
document.getElementById("spanId").firstChild.nodeValue = "New Value";
document.getElementById("TextBoxId").value;
Math.sqrt(number)

34. To view the current web address using JavaScript
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
alert("Alert Text Here")
===
window.location()

35. To insert Javascript into a web page
if (condition) {}
Math.min(var1, var2, varN)
<script type="text/javascript">.....</script>
Either single or double quotes surrounding the data

36. To create an Array object in JavaScript
var arrayVar = new Array()
var stringVar = "part 1:" + "part 2";
Math.abs(number)
document.getElementById(id)

37. Math object method used to return the absolute value of a given number
Math.abs(number)
event handler .
Underscores
Math.ceil(number)

38. Math object method used to return a given number rounded to the next highest integer value
Math.ceil(number)
document.getElementById("TextBoxId").focus;
document.writeln("Text Here") //Advances to new line after text
Math.pow(number, power)

39. To assign actions to the window onLoad event
Charset
Math.ceil(number)
n
window.onload = function() {//actions here}

40. ________ comments start with / and end with /.
charAt(position)
document.getElementById("TextBoxId").focus;
Number.NEGATIVE_INFINITY
Multi line

41. The _____ attribute is used to denote external file for script use
Charset
Either single or double quotes surrounding the data
Src - e.g. <script src="fileName.js"> //
Math.ceil(number)

42. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
focus
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
string
var answerVar = confirm("Message Text Here")

43. The format to create a new Date object from a string
Math.pow(number, power)
var dateObject = new Date("11/22/2012 18:25:35")
toString()
var functionName = function(param1, param2, paramN) {}

44. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
concat(var1, var2, varN)
Underscores
alert("Alert Text Here")

45. Unlike ________________ identity operators do not perform type coercion.
standard equality operators
toFixed(digitCount)
document.getElementById("CheckboxId").checked = true; //Could also be false
window.location()

46. The string escape sequence to insert a vertical tab in JavaScript
Either single or double quotes surrounding the data
(Condition_Expression) ? Value_If_True : Value_If_False;
v
document.getElementById("textAreaId").value;

47. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
document.getElementById("textAreaId").value;
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.pow(number, power)

48. 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

49. This returns only True or false values
toExponential(digits)
toUpperCase()
ondblclick
confirm()

50. To create a single line comment in JavaScript
concat(var1, var2, varN)
window.onload = function() {//actions here}
Two forward slashes "//"
Use the second parameter. Example: prompt("Enter Age:", "18")