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 get the value or the currently selected item for lists
<noscript>
document.getElementById("listId").value;
var variableName;
focus

2. The escape sequence used to insert a Unicode character into a string in JavaScript
var stringVar = "part 1:" + "part 2";
udddd
confirm()
standard equality operators

3. To create an Array object in JavaScript
redeclare
var arrayVar = new Array()
ondblclick
confirm()

4. To view the current web address using JavaScript
window.location()
Math.abs(number)
<script type="text/javascript">.....</script>
Src - e.g. <script src="fileName.js"> //

5. 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)
<noscript>
while (condition) {}
f

6. Date object method used to return a string containing the date and time
n
Math.random() //Returns a value >= 0.0 but <1.0
window.onload = function() {//actions here}
toString()

7. Math object method used to return a given number rounded to the next highest integer value
document.getElementById("spanId").firstChild.nodeValue = "New Value";
Math.ceil(number)
document.getElementById("TextBoxId").focus;
if (condition) {}

8. To make the browser load a new page using JavaScript
window.location = "New Web Address Here";
document.getElementById("radioButtonId").value;
n
while (condition) {}

9. A _______ variable can be changed and accessed from within and without a function or object.
Charset
global
ondblclick
(Condition_Expression) ? Value_If_True : Value_If_False;

10. To display an alert
document.getElementById("textAreaId").value;
var dateVar = new Date()
===
alert("Alert Text Here")

11. Math object method used to return the absolute value of a given number
Math.abs(number)
!==
Math.min(var1, var2, varN)
event handler .

12. Unlike ________________ identity operators do not perform type coercion.
Math.floor(number)
Math.max(var1, var2, varN)
standard equality operators
toPrecision(precision)

13. Math object method used to return the square root of a given number
Math.sqrt(number)
!==
Src - e.g. <script src="fileName.js"> //
udddd

14. This returns only True or false values
var arrayVar = new Array()
Number.NEGATIVE_INFINITY
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
confirm()

15. To get the current value of the control for a text area
\
document.getElementById("textAreaId").value;
for (counter; condition; incrementor) {}
isNaN(varHere) //Returns true or false.

16. The string escape sequence to insert a carriage return in JavaScript
var functionName = function(param1, param2, paramN) {}
document.getElementById("radioButtonId").checked;
r
var arrayVar = new Array()

17. Math object method used to return a given number raised to a given power
Math.pow(number, power)
n
document.getElementById("textAreaId").value = "Text Value";
window.location()

18. What String object method returns a new string containing the value of the original string but in all lower case
toLowerCase()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toExponential(digits)
var dateVar = new Date()

19. To assign the return value of confirm() to a variable
var answerVar = confirm("Message Text Here")
document.write("Text Here") //Remains on current line
Underscores
document.getElementById("CheckboxId").checked = true; //Could also be false

20. Number object method used to round numbers to the specified number of decimal places
toFixed(digits)
var variableName;
\
global

21. To create a function in JavaScript
confirm()
Objects
Number.NEGATIVE_INFINITY
var functionName = function(param1, param2, paramN) {}

22. A statement that yields a value
document.writeln("Text Here") //Advances to new line after text
expression
Src - e.g. <script src="fileName.js"> //
(Condition_Expression) ? Value_If_True : Value_If_False;

23. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
Underscores
var stringVar = prompt("Text Here")
substring(startIndex, stopIndex)
Objects

24. To write text to the current element of the DOM
document.getElementById("ButtonId").onclick = functionName;
document.write("Text Here") //Remains on current line
document.getElementById("listId").value;
var functionName = function(param1, param2, paramN) {}

25. The four attributes of the <script> tag:Type - Src - _____ and Defer
var variableName;
===
Charset
if (condition) {}

26. To assign the value from a prompt to a string
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("radioButtonId").checked = true; //Could also be false
var stringVar = prompt("Text Here")
redeclare

27. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
setMilliseconds()
getFullYear()
concat(var1, var2, varN)
<script type="text/javascript">.....</script>

28. 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

29. To code a button.onclick event handler
document.getElementById("textAreaId").value = "Text Value";
Use the second parameter. Example: prompt("Enter Age:", "18")
document.getElementById("ButtonId").onclick = functionName;
document.getElementById("checkboxId").checked;

30. Number object method used to return a numerical string with the specified number of significant digits
toPrecision(precision)
focus
document.getElementById("radioButtonId").value;
===

31. To code a for statement in JavaScript
concat(var1, var2, varN)
focus
for (counter; condition; incrementor) {}
Math.max(var1, var2, varN)

32. To alter the value of the text element in a span tag
document.getElementById("spanId").firstChild.nodeValue = "New Value";
t
Underscores
'

33. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
document.getElementById("radioButtonId").checked;
getFullYear()
Src - e.g. <script src="fileName.js"> //
charAt(position)

34. To code a while statement in JavaScript
toString(base)
var functionName = function(param1, param2, paramN) {}
while (condition) {}
Multi line

35. To test that a variable contains a valid number
window.onload = function() {//actions here}
isNaN(varHere) //Returns true or false.
toLowerCase()
Math.pow(number, power)

36. To assign the value from a prompt to a non-string variable
indexOf(searchValue, startPosition)
f
Math.random() //Returns a value >= 0.0 but <1.0
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

37. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
document.getElementById("TextBoxId").disabled = true;
focus
document.getElementById("ButtonId").onclick = functionName;
concat(var1, var2, varN)

38. The identity operator for equals
t
document.getElementById("TextBoxId").focus;
Math.sqrt(number)
===

39. The events common to most controls: onfocus - onblur - onclick - _______ - onchange - onselect
Math.pow(number, power)
\
ondblclick
sensitive

40. To create a Date object in JavaScript
redeclare
var variableName;
var dateVar = new Date()
window.location()

41. When you add a string and a number the result will be a ____
document.getElementById("TextBoxId").focus;
var dateVar = new Date()
toString(base)
string

42. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
document.getElementById("listId").value;
substring(startIndex, stopIndex)
Math.max(var1, var2, varN)
event handler .

43. To display a confirmation
confirm()
event handler .
confirm("Message Text Here")
document.write("Text Here") //Remains on current line

44. To access a page element by id
(Condition_Expression) ? Value_If_True : Value_If_False;
udddd
document.getElementById(id)
event handler .

45. Math object method used to return a random number
!==
Math.max(var1, var2, varN)
Math.random() //Returns a value >= 0.0 but <1.0
global

46. To set the current value of the control for a text area
sensitive
document.getElementById("textAreaId").value = "Text Value";
toPrecision(precision)
document.getElementById("TextBoxId").value;

47. To get the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked;
Math.min(var1, var2, varN)
document.writeln("Text Here") //Advances to new line after text
for (counter; condition; incrementor) {}

48. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
document.getElementById("checkboxId").checked;
document.getElementById("TextBoxId").disabled = true;
var stringVar = prompt("Text Here")

49. To set focus on the control for textboxes
event handler .
standard equality operators
document.getElementById("TextBoxId").focus;
r

50. String object method used to return a new string that contains part of the original string from the specified start position
substring(startIndex)
Math.max(var1, var2, varN)
document.getElementById("radioButtonId").checked = true; //Could also be false
document.getElementById("checkboxId").checked;