JS Certification

You are a creating a web page with a script. The script will insert the window's location inside the page's input element.

How should you complete the code?

b

c

d

e

innerHTML

window

document

location

getElementByID

You are creating a web page that requests a username. You need to write a function that retrieves the username from the form.

How should you complete the code?

• 
• 
• 

You are creating a web page that tests a user’s ability to accurately type text. The

validation should be case-insensitive. How should you complete the code?

Toanswer,dragappropriatefunctionstothecorrectlocations.

a

b

c

d

value

toLowerCase

innerHTML

toLowerCase

A JavaScript array is initialized as follows: 

 

var array=[20,40,60,80];

You write the following code to manipulate the array:

array.shift();

array.pop();

array.push(10);

array.unshift(100);

 

You need to determine the contents of the array.

 

• 10

• 60

• 100

• 40

You need to write a loop that will traverse the length of an array to find the value orange. If an array element value is null, the code should immediately go to the next element. When the value is found, the loop should exit.

How should you​ complete the code?

b

c

d

while

continue

for

break

do

Your instructor has asked you to implement code that would display a two-

dimensional array of any size inside a <div> tag.

Which three segments should you use to develop the solution?

• 
• 
• 
• 
• 

​ (a)   Display a popup box with the specified message with the OK button.

​ (b)   Display a popup box to take the user's input with the OK and Cancel buttons.

​ (c)   Display a popup box with the specified message with OK and Cancel buttons.

• alert
• prompt
• confirm
• window
• location

Evaluate the following code. Line numbers are included for reference only.

What is the value of each variable at line 07?

• n = 10

  c = 55

  a = 0

  d = 5

• n = 50

  c = 5

  a = 10

  d = 55

• n = 5

  c = 55

  a = 10

  d = 5

Evaluate the following code. Line numbers are included for reference only. var n = 50; var c = n + 5; var a = n % 2; var d = c / 11; n = d * 2; console.log (n, c, a, d); What is the value of each variable at line 07? To answer, drag the appropriate value to the correct variable. Each value may be used once, more than once, or not at all. NOTE: Each correct selection is worth one point.

• 10

• 55

• 0

• 5

~score can be used as a variable name. ​ (a)  

totalscore is in the correct format according to standard naming conventions for JavaScript. ​ (b)  

The characters // are used to mark a single line as a comment. ​ (c)  

switch can be used as a variable. ​ (d)  

• No
• Yes