Consider the following JavaScript program: var x, y, z; function sub1() { var a,

ID: 3678453 • Letter: C

Question

Consider the following JavaScript program:

var x, y, z;

function sub1() {

var a, y, z;

function sub2() {

var a, b, z;

. . .

}

. . .

}

function sub3() {

var a, x, w;

. . .

}

List all the variables, along with the program units where they are

declared, that are visible in the bodies of sub1, sub2, and sub3, assuming

static scoping is used.

What arguments can you make for the idea of a single language for all programming domains?

Point 1 - In sub2:

a, b, z in sub2.

y in sub1 (a and z of sub1 are hidden).

x the global variable (global variables y and z are hidden).

Point 2 - In sub1:

a, y, z in sub1.

x the global variable (global variables y and z are hidden).

Point 3 - In sub3:

a, x, w in sub3.

y, z the global variables (global variable x is hidden).

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