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 set the digit precision of a decimal number
v
document.getElementById("spanId").firstChild.nodeValue = "New Value";
<script type="text/javascript">.....</script>
toFixed(digitCount)

2. The escape sequence used to insert a Unicode character into a string in JavaScript
udddd
toString(base)
toLowerCase()
while (condition) {}

3. To create an Array object in JavaScript
document.getElementById(id)
r
f
var arrayVar = new Array()

4. To create a single line comment in JavaScript
Two forward slashes "//"
prompt("Text Here")
<script type="text/javascript">.....</script>
document.getElementById("checkboxId").checked;

5. Math object method used to return the highest value from a set of supplied numbers
standard equality operators
r
document.getElementById("listId").value;
Math.max(var1, var2, varN)

6. To code a while statement in JavaScript
substring(startIndex)
while (condition) {}
confirm("Message Text Here")
Src - e.g. <script src="fileName.js"> //

7. To assign the value from a prompt to a string
Math.abs(number)
redeclare
var stringVar = prompt("Text Here")
standard equality operators

8. String object method used to concatenate multiple strings
concat(var1, var2, varN)
confirm("Message Text Here")
toPrecision(precision)
document.getElementById("textAreaId").value = "Text Value";

9. To display an alert
===
redeclare
alert("Alert Text Here")
document.getElementById("TextBoxId").focus;

10. 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)
sensitive
var stringVar = "part 1:" + "part 2";
Objects

11. Math object method used to return a given number rounded to the next highest integer value
\
toFixed(digitCount)
Math.ceil(number)
substring(startIndex)

12. The available set methods for a Date object: setFullYear() - setMonth() - setDate() - setHours() - setMinutes() - setSeconds() - _________
charAt(position)
Math.ceil(number)
document.getElementById("TextBoxId").value;
setMilliseconds()

13. To display a confirmation
window.onload = function() {//actions here}
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)
(Condition_Expression) ? Value_If_True : Value_If_False;
confirm("Message Text Here")

14. Date object method used to return a string containing the time
toTimeString()
substring(startIndex, stopIndex)
semicolon ";"
document.getElementById("CheckboxId").checked = true; //Could also be false

15. Number object method used to return a number in exponential format with the specified number of decimal places
toString()
toExponential(digits)
Math.pow(number, power)
document.getElementById("TextBoxId").value;

16. The ________ tag is used to display the text between the opening and closing tag if JavaScript is disabled or otherwise not available
toDateString()
<noscript>
sensitive
Math.abs(number)

17. Date object method used to return a string containing the date
window.location()
v
toDateString()
document.getElementById("checkboxId").checked;

18. 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

19. When you add a string and a number the result will be a ____
Math.sqrt(number)
string
window.onload = function() {//actions here}
indexOf(searchValue, startPosition)

20. The four attributes of the <script> tag:Type - Src - _____ and Defer
document.getElementById("radioButtonId").value;
n
toPrecision(precision)
Charset

21. The format to create a new Date object from a string
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("textAreaId").value;
window.location = "New Web Address Here";
var dateObject = new Date("11/22/2012 18:25:35")

22. Unlike ________________ identity operators do not perform type coercion.
event handler .
\
semicolon ";"
standard equality operators

23. 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.writeln("Text Here") //Advances to new line after text
Math.floor(number)
substring(startIndex, stopIndex)
focus

24. To code a for statement in JavaScript
"
document.getElementById("checkboxId").value;
Math.max(var1, var2, varN)
for (counter; condition; incrementor) {}

25. What Date object method is used to return the number of milliseconds since the start of GMT
\
var arrayVar = new Array()
getTime()
window.location = "New Web Address Here";

26. Math object method used to return a given number that has been rounded to the closes integer value
Charset
standard equality operators
redeclare
Math.round(number)

27. Math object method used to return a given number raised to a given power
toDateString()
semicolon ";"
Math.floor(number)
Math.pow(number, power)

28. To assign the value from a prompt to a non-string variable
document.getElementById("radioButtonId").checked = true; //Could also be false
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toString(base)
Objects

29. To make the browser load a new page using JavaScript
substring(startIndex)
focus
window.location = "New Web Address Here";
ondblclick

30. To code a button.onclick event handler
!==
Math.floor(number)
confirm()
document.getElementById("ButtonId").onclick = functionName;

31. To code an If statement in JavaScript
if (condition) {}
concat(var1, var2, varN)
var stringVar = "part 1:" + "part 2";
document.getElementById("CheckboxId").checked = true; //Could also be false

32. Math object method used to return a random number
document.getElementById("listId").value;
window.onload = function() {//actions here}
toPrecision(precision)
Math.random() //Returns a value >= 0.0 but <1.0

33. The _____ attribute is used to denote external file for script use
document.getElementById(id)
Multi line
udddd
Src - e.g. <script src="fileName.js"> //

34. To write text to the current element of the DOM
document.writeln("Text Here") //Advances to new line after text
ondblclick
charAt(position)
document.write("Text Here") //Remains on current line

35. To declare a variable in JavaScript
var variableName;
Underscores
var stringVar = prompt("Text Here")
window.location = "New Web Address Here";

36. To get the current checked status of the control for radio buttons
'
event handler .
redeclare
document.getElementById("radioButtonId").checked;

37. The string escape sequence to insert a carriage return in JavaScript
ondblclick
Use the second parameter. Example: prompt("Enter Age:", "18")
t
r

38. The string escape sequence to insert a vertical tab in JavaScript
expression
v
document.getElementById("ButtonId").onclick = functionName;
var dateVar = new Date()

39. To create a function that returns a value in JavaScript
standard equality operators
document.getElementById("textAreaId").value;
toTimeString()
var functionName = function(param1, param2, paramN) {}

40. A statement that yields a value
var functionName = function(param1, param2, paramN) {}
for (counter; condition; incrementor) {}
expression
toDateString()

41. Math object method used to return the lowest value for a set of supplied numbers
Math.min(var1, var2, varN)
document.getElementById("radioButtonId").value;
Math.ceil(number)
for (counter; condition; incrementor) {}

42. To get the text value of the control for radio buttons
var stringVar = prompt("Text Here")
substring(startIndex)
var functionName = function(param1, param2, paramN) {}
document.getElementById("radioButtonId").value;

43. JavaScript is case _______
(Condition_Expression) ? Value_If_True : Value_If_False;
alert("Alert Text Here")
window.location = "New Web Address Here";
sensitive

44. To set the current checked status of the control for radio buttons
getFullYear()
toFixed(digitCount)
<script type="text/javascript">.....</script>
document.getElementById("radioButtonId").checked = true; //Could also be false

45. To insert Javascript into a web page
window.onload = function() {//actions here}
alert("Alert Text Here")
redeclare
<script type="text/javascript">.....</script>

46. The syntax of a conditional operator
Math.sqrt(number)
(Condition_Expression) ? Value_If_True : Value_If_False;
toLowerCase()
Math.max(var1, var2, varN)

47. The string escape sequence to insert a double quote in JavaScript
toString()
while (condition) {}
substring(startIndex)
"

48. The string escape sequence to insert a tab in JavaScript
Two forward slashes "//"
t
document.getElementById("radioButtonId").value;
indexOf(searchValue, startPosition)

49. What String object method returns a new string containing the value of the original string but in all upper case
toTimeString()
prompt("Text Here")
toUpperCase()
toFixed(digitCount)

50. To get the current value for textboxes
var stringVar = prompt("Text Here")
document.getElementById("TextBoxId").value;
window.onload = function() {//actions here}
toExponential(digits)