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 current checked status of the control for radio buttons
string
document.getElementById("radioButtonId").checked;
udddd
document.write("Text Here") //Remains on current line

2. When you __________ a javascript variable it retains its original value
Math.random() //Returns a value >= 0.0 but <1.0
redeclare
document.getElementById("radioButtonId").value;
t

3. 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
document.getElementById("ButtonId").onclick = functionName;
n
window.location = "New Web Address Here";
substring(startIndex, stopIndex)

4. To create a new Date object
getTime()
r
Src - e.g. <script src="fileName.js"> //
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

5. When you add a string and a number the result will be a ____
v
<noscript>
string
Math.min(var1, var2, varN)

6. To set the current checked status of the control for checkboxes
v
Math.min(var1, var2, varN)
document.getElementById("CheckboxId").checked = true; //Could also be false
isNaN(varHere) //Returns true or false.

7. Date object method used to return a string containing the date
var arrayVar = new Array()
document.getElementById("ButtonId").onclick = functionName;
<script type="text/javascript">.....</script>
toDateString()

8. A _______ variable can be changed and accessed from within and without a function or object.
global
<noscript>
n
prompt("Text Here")

9. To get the current value of the control for a text area
indexOf(searchValue, startPosition)
toUpperCase()
document.getElementById("textAreaId").value;
toExponential(digits)

10. 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

11. The available properties for the Number object: Number.MAX_VALUE - Number.MIN_VALUE - Number.POSITIVE_INFINITY - _______ - Number.NaN
var arrayVar = new Array()
var stringVar = "part 1:" + "part 2";
toTimeString()
Number.NEGATIVE_INFINITY

12. Math object method used to return a random number
Math.random() //Returns a value >= 0.0 but <1.0
confirm("Message Text Here")
redeclare
document.getElementById("checkboxId").value;

13. 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)
<noscript>
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

14. A statement that yields a value
document.getElementById("ButtonId").onclick = functionName;
expression
===
"

15. To make the browser load a new page using JavaScript
window.location = "New Web Address Here";
document.getElementById("radioButtonId").checked;
Math.min(var1, var2, varN)
expression

16. Unlike ________________ identity operators do not perform type coercion.
"
confirm("Message Text Here")
'
standard equality operators

17. The syntax of a conditional operator
Math.round(number)
Use the second parameter. Example: prompt("Enter Age:", "18")
event handler .
(Condition_Expression) ? Value_If_True : Value_If_False;

18. To create a function that returns a value in JavaScript
var functionName = function(param1, param2, paramN) {}
substring(startIndex)
getTime()
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

19. Date object method used to return a string containing the date and time
toString()
var answerVar = confirm("Message Text Here")
!==
<script type="text/javascript">.....</script>

20. To create an Array object in JavaScript
toFixed(digitCount)
window.location = "New Web Address Here";
getFullYear()
var arrayVar = new Array()

21. The escape sequence used to insert a Unicode character into a string in JavaScript
ondblclick
sensitive
udddd
setMilliseconds()

22. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
getFullYear()
window.location()
standard equality operators
Underscores

23. To set focus on the control for textboxes
Number.NEGATIVE_INFINITY
if (condition) {}
document.getElementById("TextBoxId").focus;
<noscript>

24. JavaScript is case _______
sensitive
Two forward slashes "//"
'
toTimeString()

25. Math object method used to return the absolute value of a given number
Math.abs(number)
toTimeString()
Two forward slashes "//"
<script type="text/javascript">.....</script>

26. The string escape sequence to insert a vertical tab in JavaScript
var stringVar = prompt("Text Here")
<noscript>
v
document.getElementById(id)

27. Math object method used to return a given number rounded to the next highest integer value
Math.ceil(number)
!==
Math.round(number)
Math.pow(number, power)

28. Statements end in JavaScript with a ________
var stringVar = prompt("Text Here")
prompt("Text Here")
semicolon ";"
window.location()

29. Math object method used to return a given number raised to a given power
v
document.getElementById("radioButtonId").checked = true; //Could also be false
n
Math.pow(number, power)

30. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
<script type="text/javascript">.....</script>
Objects
"
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

31. To set the current value of the control for a text area
document.getElementById("spanId").firstChild.nodeValue = "New Value";
document.getElementById("textAreaId").value = "Text Value";
toFixed(digits)
var functionName = function(param1, param2, paramN) {}

32. To access a page element by id
toString()
document.getElementById(id)
toUpperCase()
Number.NEGATIVE_INFINITY

33. String object method used to get the character at a specified index position
charAt(position)
document.write("Text Here") //Remains on current line
udddd
document.getElementById("checkboxId").value;

34. The identity operator for equals
Math.ceil(number)
Math.max(var1, var2, varN)
===
document.getElementById("TextBoxId").disabled = true;

35. The four attributes of the <script> tag:Type - Src - _____ and Defer
Math.ceil(number)
document.getElementById("checkboxId").value;
Charset
indexOf(searchValue, startPosition)

36. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
'
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
Math.abs(number)

37. To code an If statement in JavaScript
Underscores
if (condition) {}
document.getElementById("TextBoxId").value;
getFullYear()

38. Command to display a prompt
document.getElementById("TextBoxId").value;
prompt("Text Here")
getTime()
var arrayVar = new Array()

39. To assign the value from a prompt to a string
r
var stringVar = prompt("Text Here")
Src - e.g. <script src="fileName.js"> //
isNaN(varHere) //Returns true or false.

40. What Date object method is used to return the number of milliseconds since the start of GMT
while (condition) {}
document.getElementById("radioButtonId").checked;
toLowerCase()
getTime()

41. String object method used to concatenate multiple strings
Charset
Multi line
concat(var1, var2, varN)
document.getElementById("spanId").firstChild.nodeValue = "New Value";

42. The string escape sequence to insert a tab in JavaScript
global
t
document.getElementById("radioButtonId").checked = true; //Could also be false
confirm("Message Text Here")

43. To get the value or the currently selected item for lists
Math.max(var1, var2, varN)
var dateObject = new Date("11/22/2012 18:25:35")
Math.random() //Returns a value >= 0.0 but <1.0
document.getElementById("listId").value;

44. To code a button.onclick event handler
Charset
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("ButtonId").onclick = functionName;
document.getElementById("checkboxId").value;

45. The two methods common to most controls: ______ //Brings focus to the control blur //Removes focus from the control
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
document.getElementById("checkboxId").checked;
focus
document.getElementById("spanId").firstChild;

46. 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)
document.getElementById("spanId").firstChild;
document.getElementById("ButtonId").onclick = functionName;
var dateVar = new Date()

47. To get the text value of the control for radio buttons
Math.abs(number)
Use the second parameter. Example: prompt("Enter Age:", "18")
if (condition) {}
document.getElementById("radioButtonId").value;

48. To denote a string in JavaScript
Either single or double quotes surrounding the data
if (condition) {}
Charset
sensitive

49. This returns only True or false values
confirm()
Math.max(var1, var2, varN)
(Condition_Expression) ? Value_If_True : Value_If_False;
document.getElementById("textAreaId").value = "Text Value";

50. To display a confirmation
Multi line
confirm("Message Text Here")
toTimeString()
Math.ceil(number)