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 code an If statement in JavaScript
if (condition) {}
focus
Either single or double quotes surrounding the data
getFullYear()

2. The string escape sequence to insert a form feed in JavaScript
f
udddd
Math.floor(number)
standard equality operators

3. Unlike ________________ identity operators do not perform type coercion.
Math.random() //Returns a value >= 0.0 but <1.0
var variableName;
Math.max(var1, var2, varN)
standard equality operators

4. What String object method returns a new string containing the value of the original string but in all lower case
Math.abs(number)
Multi line
document.getElementById(id)
toLowerCase()

5. Math object method used to return the lowest value for a set of supplied numbers
'
Math.min(var1, var2, varN)
var dateObject = new Date("11/22/2012 18:25:35")
document.write("Text Here") //Remains on current line

6. The syntax of a conditional operator
document.getElementById("textAreaId").value = "Text Value";
document.getElementById("radioButtonId").checked = true; //Could also be false
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
(Condition_Expression) ? Value_If_True : Value_If_False;

7. Statements end in JavaScript with a ________
document.getElementById("ButtonId").onclick = functionName;
semicolon ";"
indexOf(searchValue, startPosition)
Math.ceil(number)

8. Command to display a prompt
while (condition) {}
toDateString()
r
prompt("Text Here")

9. A _______ variable can be changed and accessed from within and without a function or object.
getTime()
document.getElementById(id)
global
expression

10. To get the text value of the control for radio buttons
Two forward slashes "//"
document.getElementById("checkboxId").value;
getTime()
prompt("Text Here")

11. The string escape sequence to insert a single quote in JavaScript

12. To get the current value for textboxes
confirm()
document.getElementById("TextBoxId").value;
r
toTimeString()

13. The string escape sequence to insert a vertical tab in JavaScript
Math.ceil(number)
v
Use the second parameter. Example: prompt("Enter Age:", "18")
confirm()

14. To code a for statement in JavaScript
isNaN(varHere) //Returns true or false.
expression
for (counter; condition; incrementor) {}
alert("Alert Text Here")

15. To code a button.onclick event handler
<noscript>
expression
document.getElementById("listId").value;
document.getElementById("ButtonId").onclick = functionName;

16. To concatenate multiple parts into a string
f
var stringVar = "part 1:" + "part 2";
while (condition) {}
getTime()

17. To create an Array object in JavaScript
getFullYear()
document.getElementById("TextBoxId").value;
var arrayVar = new Array()
document.getElementById("radioButtonId").checked = true; //Could also be false

18. To get the current checked status of the control for checkboxes
document.write("Text Here") //Remains on current line
window.location = "New Web Address Here";
document.getElementById("checkboxId").checked;
while (condition) {}

19. To access the text element in a <span> tag
document.getElementById("spanId").firstChild;
Either single or double quotes surrounding the data
prompt("Text Here")
Math.max(var1, var2, varN)

20. To create a function that returns a value in JavaScript
document.getElementById("spanId").firstChild.nodeValue = "New Value";
for (counter; condition; incrementor) {}
Src - e.g. <script src="fileName.js"> //
var functionName = function(param1, param2, paramN) {}

21. The _____ attribute is used to denote external file for script use
Src - e.g. <script src="fileName.js"> //
document.getElementById("radioButtonId").checked;
Number.NEGATIVE_INFINITY
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds)

22. To set the current checked status of the control for radio buttons
isNaN(varHere) //Returns true or false.
document.getElementById("radioButtonId").checked = true; //Could also be false
for (counter; condition; incrementor) {}
udddd

23. To create a function in JavaScript
var functionName = function(param1, param2, paramN) {}
"
t
toString()

24. The valid characters for an identifier in JavaScript: Letters - Numbers - ________ and Dollar Signs
var dateObject = new Date("11/22/2012 18:25:35")
expression
global
Underscores

25. Math object method used to return a given number rounded to the next lowest integer value
window.onload = function() {//actions here}
document.getElementById("textAreaId").value;
document.getElementById("ButtonId").onclick = functionName;
Math.floor(number)

26. 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("textAreaId").value = "Text Value";
v
document.getElementById("textAreaId").value;
substring(startIndex, stopIndex)

27. A function that is called with a certain event occurs - e.g. button.onclick and window.onload.
event handler .
document.getElementById("TextBoxId").disabled = true;
f
Math.min(var1, var2, varN)

28. To insert Javascript into a web page
getFullYear()
\
<script type="text/javascript">.....</script>
toUpperCase()

29. To assign the value from a prompt to a string
for (counter; condition; incrementor) {}
var stringVar = prompt("Text Here")
var answerVar = confirm("Message Text Here")
document.getElementById("TextBoxId").value;

30. To denote a string in JavaScript
string
Either single or double quotes surrounding the data
'
Math.round(number)

31. The format to create a new Date object from a string
var dateObject = new Date("11/22/2012 18:25:35")
toString(base)
document.getElementById("ButtonId").onclick = functionName;
toFixed(digitCount)

32. To make the browser load a new page using JavaScript
Underscores
charAt(position)
getFullYear()
window.location = "New Web Address Here";

33. To get the current value of the control for a text area
Use a parse. Example : var intVar = parseInt(prompt("Text Here"))
toLowerCase()
document.getElementById("textAreaId").value;
document.getElementById("radioButtonId").value;

34. The available get methods for a Date object: getTime() - _________ - getMonth() - getDate() - getHours() - getMinutes() - getSeconds() - getMilliseconds()
Math.max(var1, var2, varN)
===
getFullYear()
string

35. To get the current checked status of the control for radio buttons
getFullYear()
document.getElementById("radioButtonId").checked;
Math.sqrt(number)
document.getElementById("checkboxId").value;

36. To code a while statement in JavaScript
document.getElementById("TextBoxId").value;
expression
while (condition) {}
var dateVar = new Date()

37. To set the control to be disabled for textboxes
ondblclick
v
document.getElementById("TextBoxId").disabled = true;
confirm("Message Text Here")

38. Date object method used to return a string containing the date
window.onload = function() {//actions here}
document.getElementById("CheckboxId").checked = true; //Could also be false
Math.floor(number)
toDateString()

39. Math object method used to return a given number raised to a given power
var stringVar = prompt("Text Here")
Math.pow(number, power)
Underscores
!==

40. Date object method used to return a string containing the date and time
'
Math.random() //Returns a value >= 0.0 but <1.0
toString()
document.getElementById("TextBoxId").value;

41. To set the digit precision of a decimal number
toString(base)
while (condition) {}
toFixed(digitCount)
document.getElementById("textAreaId").value = "Text Value";

42. The string escape sequence to insert a tab in JavaScript
confirm("Message Text Here")
(Condition_Expression) ? Value_If_True : Value_If_False;
t
Use the second parameter. Example: prompt("Enter Age:", "18")

43. The four attributes of the <script> tag:Type - Src - _____ and Defer
Math.round(number)
Charset
indexOf(searchValue, startPosition)
var stringVar = prompt("Text Here")

44. Math object method used to return the highest value from a set of supplied numbers
Math.max(var1, var2, varN)
substring(startIndex, stopIndex)
Math.random() //Returns a value >= 0.0 but <1.0
semicolon ";"

45. The string escape sequence to insert a double quote in JavaScript
concat(var1, var2, varN)
for (counter; condition; incrementor) {}
"
document.getElementById("radioButtonId").value;

46. To declare a variable in JavaScript
Math.max(var1, var2, varN)
document.getElementById("textAreaId").value = "Text Value";
var variableName;
window.onload = function() {//actions here}

47. Math object method used to return a given number rounded to the next highest integer value
Math.ceil(number)
getFullYear()
document.getElementById("textAreaId").value = "Text Value";
while (condition) {}

48. To access a page element by id
substring(startIndex)
toString()
document.getElementById(id)
udddd

49. To write text to the current element of the DOM
Math.pow(number, power)
document.write("Text Here") //Remains on current line
Math.round(number)
substring(startIndex, stopIndex)

50. JavaScript is case _______
!==
semicolon ";"
sensitive
expression