Exam 70-480 topic 4 question 36 discussion

Actual exam question from Microsoft's 70-480

Question #: 36
Topic #: 4

You have a webpage that includes the following markup and code:

You need to troubleshoot the code by clicking the Submit button.
Which value will be displayed?

A. 10
B. 20
C. Undefined
D. Runtime error

Show Suggested Answer

Suggested Answer: A 🗳️
* The outermost assignment, counter = 10; will decide the output that is displayed.
* Local variables have local scope: They can only be accessed within the function.

Example -
// code here can not use carName
function myFunction() {
var carName = "Volvo";
// code here can use carName
}
* A variable declared outside a function, becomes GLOBAL.
A global variable has global scope: All scripts and functions on a web page can access it.

Example -
var carName = " Volvo";
// code here can use carName
function myFunction() {
// code here can usecarName
}
Reference: JavaScript Scope

by urielrodz at Jan. 26, 2021, 1:46 a.m.

Comments

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urielrodz

4 years, 5 months ago

The answer is incorrect because Var is in a global scope so the answer is B

upvoted 1 times

Leonard

4 years, 5 months ago

Fun is a function that was never called

upvoted 2 times

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