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3 years ago

Describe how an operating system interacts with the computer.

Computers and Technology

2 answers:

enyata [817]3 years ago

6 0

The user requests an application to run by making a system call to get it started

erica [24]3 years ago

3 0

An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. ... In addition, users can interact directly with the operating system through a user interface such as a command line or a graphical user interface (GUI).Operating system is like a nervous system and the processor is brain.

Drivers

In order for the operating system to talk to your hardware, it needs drivers. Drivers teach the operating system to interact with each bit of hardware. Graphics cards, sound cards, networking cards, USB peripherals, and everything else you connect to your computer relies on drivers. The operating system then uses these drivers to ensure correct operation of each device.

Memory Management

All computers have random access memory, or RAM. Unlike hard drive storage, which is relatively permanent, RAM is what remembers everything you're doing in the moment. If you have a browser, photo editor, music program, and messaging application open, all of your progress and the status of each are stored in the RAM. The operating system works with your RAM sticks to control how much memory is used by each application, including the OS itself.

CPU Control

Your computer's processes are executed by its central processing unit, or CPU. Signals sent to and from the CPU determine what happens, and in what order. The operating system works with the CPU to create a checklist of processes to execute and ensures that each gets done. A CPU can only perform one task at a time; because CPUs are so incredibly fast, it gives the illusion of many simultaneous tasks. The operating system controls the priority of each task and sees them through to completion.

Fans and Cooling

One of the most important components of your computer is its cooling system. The CPU fan keeps the CPU from overheating in moments of high stress. Overheating can cause permanent damage to a CPU. The operating system communicates with both the CPU and the fan to help ensure the PC stays cool. This process is also assisted by the motherboard's internal controls, known as the BIOS, and can be overwritten by applications running in the OS.

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The automotive system that connects the engine and the transmission to the wheels is called the

insens350 [35]

I believe the driveshaft

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3 years ago

.Write a MATLAB script that VECTORIZES (eliminates the loop) the following code. (4points)

gladu [14]

Answer:

Explanation:

try

clc

clear

close all

x=linspace(0,2*pi,7);

z=cos(pi.*x./3)

% the output on mine is to 4 decimals so it looks a bit different than what the output on your example is , but, I think if you change the format to decimal 2 it will look the same :)

4 0

3 years ago

ISO 400 is twice as sensitive and ISO 100 true or false

beks73 [17]

Answer:

Quite simply, when you double your ISO speed, you are doubling the brightness of the photo. So, a photo at ISO 400 will be twice brighter than ISO 200, which will be twice brighter than ISO 100.

Explanation:

ISO most often starts at the value of ISO 100. This is the lowest, darkest setting, also called the base ISO. The next full stop, ISO 200, is twice as bright, and ISO 400 is twice as bright than that. Thus, there are two stops between ISO 100 and 400, four stops between 100 and 1600, and so on.

4 0

3 years ago

Suppose you have two arrays of ints, arr1 and arr2, each containing ints that are sorted in ascending order. Write a static meth

telo118 [61]

Since both arrays are already sorted, that means that the first int of one of the arrays will be smaller than all the ints that come after it in the same array. We also know that if the first int of arr1 is smaller than the first int of arr2, then by the same logic, the first int of arr1 is smaller than all the ints in arr2 since arr2 is also sorted.

public static int[] merge(int[] arr1, int[] arr2) {
int i = 0; //current index of arr1
int j = 0; //current index of arr2
int[] result = new int[arr1.length+arr2.length]
while(i < arr1.length && j < arr2.length) {
result[i+j] = Math.min(arr1[i], arr2[j]);
if(arr1[i] < arr2[j]) {
i++;
} else {
j++;
}
}
boolean isArr1 = i+1 < arr1.length;
for(int index = isArr1 ? i : j; index < isArr1 ? arr1.length : arr2.length; index++) {
result[i+j+index] = isArr1 ? arr1[index] : arr2[index]
}
return result;
}

So this implementation is kind of confusing, but it's the first way I thought to do it so I ran with it. There is probably an easier way, but that's the beauty of programming.

A quick explanation:

We first loop through the arrays comparing the first elements of each array, adding whichever is the smallest to the result array. Each time we do so, we increment the index value (i or j) for the array that had the smaller number. Now the next time we are comparing the NEXT element in that array to the PREVIOUS element of the other array. We do this until we reach the end of either arr1 or arr2 so that we don't get an out of bounds exception.

The second step in our method is to tack on the remaining integers to the resulting array. We need to do this because when we reach the end of one array, there will still be at least one more integer in the other array. The boolean isArr1 is telling us whether arr1 is the array with leftovers. If so, we loop through the remaining indices of arr1 and add them to the result. Otherwise, we do the same for arr2. All of this is done using ternary operations to determine which array to use, but if we wanted to we could split the code into two for loops using an if statement.

4 0

4 years ago

What is one common way to select a package name for a project?

Nastasia [14]

Answer:

Jeez idrk

Explanation:

Akkaqka

7 0

3 years ago