What Is the Output of the Following Program?
#Include $\quad$

question 20

Multiple Choice

What is the output of the following program?
#include <iostream>
using namespace std;
void doSomething(int) ;
int main()
{
$\quad$ int x = 2;
$\quad$ cout << x << endl;
$\quad$ doSomething(x) ;
$\quad$ cout << x << endl;
$\quad$ return 0;
}
void doSomething(int num)
{
$\quad$ num = 0;
$\quad$ cout << num << endl;
}

• A) 2
• 0
• 2
• B) 2
• 2
• 2
• C) 0
• 0
• 0
• D) 2
• 0
• 0

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Definitions:

Null Hypothesis

The null hypothesis is a statement that there is no effect or no difference, and it serves as the assumption to be tested in statistical analyses.

T-test

A statistical method employed to assess if there's a significant difference between the average values of two distinct groups.

Critical Value

A point on the test distribution that is compared with the test statistic to determine whether to reject the null hypothesis.

Alpha

The level of significance in statistical testing, representing the probability of rejecting the null hypothesis when it is actually true.