Answer:
A hard drive is what on your computer stores the operating system and all of the files you download. A pen drive (USB DRIVE) is a portable drive used for storing files that you can plug into computers with usb drive ports and transfer that data over to the computer through the USB Drive and you can also copy data onto the USB Drive from a computer and transfer it to other computers.
Explanation:
Computer Technician
Answer:
C code for half()
#include<stdio.h>
void half(float *pv);
int main()
{
float value=5.0; //value is initialized
printf ("Value before half: %4.1f\n", value); // Prints 5.0
half(&value); // the function call takes the address of the variable.
printf("Value after half: %4.1f\n", value); // Prints 2.5
}
void half(float *pv) //In function definition pointer pv will hold the address of variable passed.
{
*pv=*pv/2; //pointer value is accessed through * operator.
}
- This method is called call-by-reference method.
- Here when we call a function, we pass the address of the variable instead of passing the value of the variable.
- The address of “value” is passed from the “half” function within main(), then in called “half” function we store the address in float pointer ‘pv.’ Now inside the half(), we can manipulate the value pointed by pointer ‘pv’. That will reflect in the main().
- Inside half() we write *pv=*pv/2, which means the value of variable pointed by ‘pv’ will be the half of its value, so after returning from half function value of variable “value” inside main will be 2.5.
Output:
Output is given as image.
Answer
File names should describe the content of the file.
Explanation
File names are set of words which are used to uniquely identify computer files which are stored in a file system. This helps one to know the contents of the file which you want to find. When you name these file names you use necessary characters you use descriptive words so that you dont have hard times when searching for them. The naming also is determined by the file system you are using because different systems impose different restrictions on the length of the file names and the allowed characters within file names.
Answer: C) Motion detectors
Explanation:
Motion detectors is the device that is used for detection of moving object in any area. They are used for security purposes by tracking motion or people and alerting the user.It consist of motion sensor for detection of motion and alerting the users or organization about security breach through alarming .
- According to the question,Chief information officer should implement motion detectors to investigate about theft that takes place in company's department on regular basis.Any intervention for company's loss will be alerted through tracking motion of the thief.
- Other options are incorrect because camera is used for recording videos and images. Bio-metric device is used for digital identification of any person to enter into a system. Man-trap is vestibule used for controlling access of a person for security.
- Thus, the correct option is option(C).
