Determine the output of the following program: var x; function bar() { writeln(x); } function foo()...

Determine the output of the following program:
var x;
function bar() {
    writeln(x);
}
function foo() {
    var x;
    x = 3;
    bar();
}
function oof() {
    var x;
    x = 7;
    foo();
}
x = 5;
oof();

(a) if the static scoping rule is used? What is the reason?.
(b) if the dynamic scoping rule is used? What is the reason?.

Expert Solution

SOL:

venereology answered 1 year ago

QUESTION 1 Consider the following program: var x = 0; function sub1() { var x =...

QUESTION 1 Consider the following program: var x = 0; function sub1() { var x = 1; function sub2() { function sub3() { print x; } sub3(); } function sub4() { var x = 2; sub2(); } sub4(); } sub1(); If this code uses static scoping, when it is executed what is printed? 0 1 2 QUESTION 2 Consider the following program: var x = 0; function sub1() { var x = 1; function sub2() { function sub3() { print...

In C++, write a function that takes in as inputs two arrays, foo and bar, and...

In C++, write a function that takes in as inputs two arrays, foo and bar, and their respective array sizes. The function should then output the concatenation of the two arrays as a singly linked list. You may assume that you are provided a singly linked list header file.

Prove Var(|X|) <= Var(X)

Part 1 Here is some code: def foo(var): var = [] var.append("hello") var.append("world") list = ["bah"]...

Part 1 Here is some code: def foo(var): var = [] var.append("hello") var.append("world") list = ["bah"] foo(list) print(list) Which Option is correct? A) ["hello","world"] is output because python passes the list by reference and the list is changed inside the function. B) ["bah"] is output because python passes the list by value so changes to the list in the function are made to a separate list than the one that is passed in. C) ["bah"] is output because python passes...

Show that Var(x-a/)=1/h^2 Var(x)

For the given function determine the following: f (x) = (sin x + cos x) 2...

For the given function determine the following: f (x) = (sin x + cos x) 2 ; [−π,π] a) Find the intervals where f(x) is increasing, and decreasing b) Find the intervals where f(x) is concave up, and concave down c) Find the x-coordinate of all inflection points

Consider the function f(x) = x 4 − 4x 2 . Determine the following: • The...

Consider the function f(x) = x 4 − 4x 2 . Determine the following: • The (x,y) coordinate pairs of the local minima and local maxima. • The (x,y) coordinate pair of the absolute minimum and absolute maximum, should they exist. If the absolute min/max is obtained at multiple points, list all of them. • The intervals of increasing and decreasing. • The intervals of concavity. That is, explain exactly where this function is convex and exactly where this function...

Consider the following production function: x = f(l,k) = lb kb where x is the output,...

Consider the following production function: x = f(l,k) = lb kb where x is the output, l is the labour input, k is the capital input, and b is a positive constant. Suppose b < 1/2. (a) Set up the cost minimization problem and solve for the conditional labour and conditional capital demand functions. Let w and r be the wage rate and rental cost of capital respectively. (b) Using your answer in (a), derive the cost function and simplify...

The output of an engineering system as a function of position (x) is modeled by the...

The output of an engineering system as a function of position (x) is modeled by the differential equation y'' + 9y = 5cos(2x) - 10sin(2x), where y = f(x), y(π/2) = 2, and y'(π/2) = 6. Solve this differential equation to obtain an expression for y as a function of x (i.e., to obtain the function y(x)).

E(Y) = 4, E(X) = E(Y+2), Var(X) = 5, Var(Y) = Var(2X+2) a. What is E(2X...

E(Y) = 4, E(X) = E(Y+2), Var(X) = 5, Var(Y) = Var(2X+2) a. What is E(2X -2Y)? b. What is Var(2X-Y+2)? c. What is SD(3Y-3X)? 2) In a large community, 65% of the residents want to host an autumn community fair. The rest of the residents answer either disagree or no opinion on this proposal. A sample of 18 residents was randomly chosen and asked for their opinions. a) What is th probability that the residents answer either disagree or...

Question