Answer: The difference between call by value and call by reference is that in call by value the actual parameters are passed into the function as arguments whereas in call by reference the address of the variables are sent as parameters.
Explanation:
Some examples are:
call by value
#include <stdio.h>
void swap(int, int);
int main()
{ int a = 10, b= 20;
swap(a, b);
printf("a: %d, b: %d\n", a, b);
}
void swap(int c, int d)
{
int t;
t = c; c = d; d = t;
}
OUTPUT
a: 10, b: 20
The value of a and b remain unchanged as the values are local
//call by reference
#include <stdio.h>
void swap(int*, int*);
int main()
{
int a = 10, b = 20;
swap(&a, &b); //passing the address
printf("a: %d, b: %d\n", a, b);
}
void swap(int *c, int *d)
{
int t;
t = *c; *c = *d; *d = t;
}
OUTPUT
a: 20, b: 10
due to dereferencing by the pointer the value can be changed which is call by reference
Answer:
Assistive technologies
Explanation:
Assistive technologies are adaptive devices and softwares that are designed to serve as aids to people with disabilities in improving their functional capabilities and making them carry out activities that are difficult to perform independently. Assistive technologies include devices and software programs that are designed for physically challenged people to help them improve their use of their computer. Examples include JAWS, Voiceover which are screen reader softwares designed for the visually impaired people.
Answer: A. System window and C. System Information window
Explanation:
Hi, RAM stands for Random Access Memory. RAM stores information about running programs in your computer, as long the computer is on.
To know how much RAM is installed on a system you can use the system window tool.
In windows 10 Right click on "Start Menu" and click on "System" in pop-up menu to open "System" window.
System window will show basic information of the computer, including the amount of RAM installed.
Also you can Type "System Information" in the search box, and select "System Information" from search results.
"System Information" window shows a more detailed system summary, of hardware resources and devices. Incluiding RAM.
Feel free to ask for more if needed or if you did not understand something.
