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. String object method used to concatenate multiple strings
global
t
concat(var1, var2, varN)
Charset

2. To make the browser load a new page using JavaScript
window.location = "New Web Address Here";
r
document.getElementById("TextBoxId").value;
var stringVar = prompt("Text Here")

3. Math object method used to return the absolute value of a given number
setMilliseconds()
Math.sqrt(number)
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.abs(number)

4. When you __________ a javascript variable it retains its original value
ondblclick
redeclare
toTimeString()
document.getElementById("radioButtonId").value;

5. A list-like construct that has properties which corresponds to JavaScript values or variables or other objects.
window.location()
redeclare
Objects
document.write("Text Here") //Remains on current line

6. To assign a default value to a prompt
document.getElementById("textAreaId").value;
toUpperCase()
var variableName;
Use the second parameter. Example: prompt("Enter Age:", "18")

7. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
event handler .
string
udddd
toFixed(digitCount)

8. A _______ variable can be changed and accessed from within and without a function or object.
Two forward slashes "//"
global
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
\

9. This returns only True or false values
document.getElementById("checkboxId").value;
confirm()
toUpperCase()
document.getElementById("radioButtonId").checked = true; //Could also be false

10. A statement that yields a value
Math.max(var1, var2, varN)
var stringVar = prompt("Text Here")
var answerVar = confirm("Message Text Here")
expression

11. To code an If statement in JavaScript
expression
t
if (condition) {}
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

12. When you add a string and a number the result will be a ____
document.getElementById("TextBoxId").focus;
window.location = "New Web Address Here";
string
charAt(position)

13. To concatenate multiple parts into a string
document.getElementById("textAreaId").value = "Text Value";
Math.floor(number)
var stringVar = "part 1:" + "part 2";
document.getElementById("TextBoxId").value;

14. String object method used to return a new string that contains part of the original string from the specified start position
var dateObject = new Date("11/22/2012 18:25:35")
if (condition) {}
substring(startIndex)
toExponential(digits)

15. 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.write("Text Here") //Remains on current line
document.getElementById("radioButtonId").checked = true; //Could also be false
var dateVar = new Date()

16. To access a page element by id
var functionName = function(param1, param2, paramN) {}
redeclare
window.location()
document.getElementById(id)

17. 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

18. To create a function in JavaScript
document.getElementById("textAreaId").value;
semicolon ";"
var functionName = function(param1, param2, paramN) {}
toTimeString()

19. The format to create a new Date object from a string
toFixed(digitCount)
var dateObject = new Date("11/22/2012 18:25:35")
while (condition) {}
f

20. Unlike ________________ identity operators do not perform type coercion.
Two forward slashes "//"
document.getElementById("spanId").firstChild;
standard equality operators
document.getElementById("spanId").firstChild.nodeValue = "New Value";

21. To get the current value for textboxes
getFullYear()
===
'
document.getElementById("TextBoxId").value;

22. To get the text value of the control for radio buttons
document.getElementById("radioButtonId").value;
f
Math.random() //Returns a value >= 0.0 but <1.0
redeclare

23. Math object method used to return a given number raised to a given power
Math.pow(number, power)
event handler .
(Condition_Expression) ? Value_If_True : Value_If_False;
substring(startIndex, stopIndex)

24. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
<noscript>
if (condition) {}
"
document.getElementById(id)

25. The identity operator for equals
===
'
var functionName = function(param1, param2, paramN) {}
setMilliseconds()

26. To write a line to the current element of the DOM (Document Object Model)
toLowerCase()
document.getElementById("listId").value;
document.writeln("Text Here") //Advances to new line after text
var stringVar = prompt("Text Here")

27. String object method used to get the character at a specified index position
charAt(position)
document.getElementById("listId").value;
document.getElementById("radioButtonId").checked;
Math.pow(number, power)

28. To set the current checked status of the control for radio buttons
document.getElementById("radioButtonId").checked = true; //Could also be false
Math.ceil(number)
global
string

29. Date object method used to return a string containing the time
toTimeString()
substring(startIndex)
expression
Number.NEGATIVE_INFINITY

30. To access the text element in a <span> tag
toFixed(digits)
document.getElementById("spanId").firstChild;
Math.round(number)
var dateVar = new Date()

31. To write text to the current element of the DOM
isNaN(varHere) //Returns true or false.
(Condition_Expression) ? Value_If_True : Value_If_False;
document.write("Text Here") //Remains on current line
document.writeln("Text Here") //Advances to new line after text

32. The escape sequence used to insert a Unicode character into a string in JavaScript
var functionName = function(param1, param2, paramN) {}
===
udddd
getTime()

33. Date object method used to return a string containing the date
document.getElementById("textAreaId").value = "Text Value";
toTimeString()
toDateString()
global

34. To set the control to be disabled for textboxes
confirm("Message Text Here")
document.getElementById("TextBoxId").disabled = true;
===
toExponential(digits)

35. Math object method used to return the highest value from a set of supplied numbers
t
Math.max(var1, var2, varN)
r
Math.ceil(number)

36. Number object method used to round numbers to the specified number of decimal places
toFixed(digits)
prompt("Text Here")
"
Math.pow(number, power)

37. The string escape sequence to insert a double quote in JavaScript
ondblclick
"
Math.random() //Returns a value >= 0.0 but <1.0
Multi line

38. To set the current value of the control for a text area
toFixed(digits)
document.getElementById("textAreaId").value = "Text Value";
if (condition) {}
var arrayVar = new Array()

39. The string escape sequence to insert a carriage return in JavaScript
r
setMilliseconds()
toTimeString()
var arrayVar = new Array()

40. To set the digit precision of a decimal number
<script type="text/javascript">.....</script>
var stringVar = "part 1:" + "part 2";
toDateString()
toFixed(digitCount)

41. To create a new Date object
Underscores
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Math.round(number)
Use the second parameter. Example: prompt("Enter Age:", "18")

42. Number object method used to return a numerical string with the specified number of significant digits
setMilliseconds()
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Charset
toPrecision(precision)

43. Math object method used to return a random number
===
Math.random() //Returns a value >= 0.0 but <1.0
sensitive
confirm()

44. The identity operator for not equal
var arrayVar = new Array()
!==
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))

45. Date object method used to return a string containing the date and time
document.getElementById("CheckboxId").checked = true; //Could also be false
Two forward slashes "//"
if (condition) {}
toString()

46. To denote a string in JavaScript
document.getElementById("CheckboxId").checked = true; //Could also be false
\
Either single or double quotes surrounding the data
n

47. Math object method used to return the square root of a given number
Math.sqrt(number)
!==
toExponential(digits)
f

48. To code a while statement in JavaScript
toString(base)
Math.max(var1, var2, varN)
while (condition) {}
document.getElementById("listId").value;

49. JavaScript is case _______
getTime()
sensitive
charAt(position)
document.getElementById("textAreaId").value = "Text Value";

50. The syntax of a conditional operator
Number.NEGATIVE_INFINITY
f
toExponential(digits)
(Condition_Expression) ? Value_If_True : Value_If_False;