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Alex777 [14]
3 years ago
5

What is the main function of an operating system​

Computers and Technology
1 answer:
alina1380 [7]3 years ago
4 0

Here are the main functions of an operating system:

1) Manage the resources of the device

The operating system controls how much of each resource is distributed, and it controls things like the processing unit and memory.

2) Establish a interface for the user of the device

The operating system must classify what the classes of the script/code have to do and what they implement.

3) Service application software

The operating system must service each application that is downloaded onto the device. It must balance it's use of storage between apps.

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Can someone explain to me how to do circuit calculations
GenaCL600 [577]

Use the following rules:

- The sum of currents that enter and exit a node (junction) is always zero. So if you have 3 wires that connect, through one flows 2A, the other 3A, then the third must deliver 5A (taking the direction into account!)


- The sum of voltages across different components should always add up. So if you have a battery of 10V with two unknown resistors, and over one of the resistors is 4V, you know the other one has the remaining 6V.


- With resistors, V=I*R must hold.

With these basic rules you should get a long way!

7 0
3 years ago
Assign decoded_tweet with user_tweet, replacing any occurrence of 'TTYL' with 'talk to you later'. Sample output with input: 'Go
nekit [7.7K]

Answer:

I am going to use the Python programming language to answer this. The source code is given below:

print("Enter your tweet here")

user_tweet = input()

decoded_tweet = user_tweet.replace('TTYL', 'talk to you later')

print("This is the decoded tweet: ")

print(decoded_tweet)

Explanation:

In the program the replace() module was used to replace 'TTYL' with 'talk to you later.'

Attached is the screenshot of the output.

8 0
3 years ago
Read 2 more answers
Consider an error-free 64 kbps satellite channel used to send 512 byte data frames in one direction, with very short acknowledge
Vladimir [108]

Answer:

The answer is "2".

Explanation:

In the given question some information is missing, that is "The propagation time for satellite to earth" which is "270 milliseconds" so, the description to this question can be defined as follows:

Given values:

Bandwidth = 64 kbps

Data frames = 512 bytes  

Propagation Time (t​​​​​​p ) =270 ms

Change Bandwidth  kbps to bps:

1 kb= 1024 bytes

calculated bandwidth= 64 kbps = 64×1024 bps = 65536 bps

1 bytes = 8 bits

512 bytes = 512 × 8 =  4096 bits

Frame length = 4096 bits

Formula

Transmission time (T​​​​​​t) = Frame length /Bandwidth

Window size = 1+2a

where a = Propagation time/Transmission time

Calculate Transmission time:

Transmission time (T​​​​​​t) = 4096 / 65536

Transmission time (T​​​​​​t)= 625 m.sec

Calculate Window size:

Window size = 1+2(270/625)

Window size = 1+2(0.432)

Window size = 1+0.864

Window size = 1.864

Window size = 2

3 0
3 years ago
Write a Python program to balance a checkbook. The main function needs to get the initial balance, the amounts of deposits, and
Irina18 [472]

Answer:

def deposit(deposit_amount, balance):

   balance += deposit_amount

   return balance;

def process_check(check_amount, balance):

   balance -= check_amount

   return balance;

balance = float(input("Enter the initial balance: "))

transaction = input("Choose transaction method - D to deposit, C to process check, Q to quit: ")

while transaction != 'Q':

   if transaction == 'D':

       deposit_amount = float(input("Enter amount to be deposited: "))

       balance = deposit(deposit_amount, balance)

       print("Current balance is: " + str(balance))

   elif transaction == 'C':

       check_amount = float(input("Enter amount to process check: "))

       if balance >= check_amount:

           balance = process_check(check_amount, balance)

           print("Current balance is: " + str(balance))

       else:

           print("Not enough money!")

   else:

       print("Invalid input!")

   transaction = input("Choose transaction method - D to deposit, C to process the check, Q to quit: ")

print("Your final balance is: " + str(balance))

Explanation:

- Create functions to handle deposits and checks

- Ask the user for the initial balance and transaction to be made

- Initialize a while loop iterates until the user enter Q

- Ask the deposit amount or check amount depending on the transaction chosen

- Calculate and print the current balance for each transaction

- Print the final balance

5 0
3 years ago
PLEASE HELP, THANK YOU SO MUCH!
ozzi

Answer:

The correct answer is "Once a day".

Explanation:

According to social media marketing, it is a good idea to check your reader at least once a day. Readers help business by tracking what the consumers are seeing and what times of the day. Checking the reader at least once a day help people in marketing to be updated, because people's preference keep changing all the time.

3 0
3 years ago
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