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kherson [118]
3 years ago
15

Which of the following statements is incorrect? An operating system provides an environment for the execution of programs. An op

erating system manages system resources. Operating systems provide both command line as well as graphical user interfaces. Operating systems must provide both protection and security.
Computers and Technology
1 answer:
rosijanka [135]3 years ago
8 0

Answer:

command line and graphical user interface

Explanation:

there were (and still are) operating system with no graphical user interface at all, as for example some Unix releases

You might be interested in
Use the arr field and mystery () method below.
kolezko [41]

Answer:

The sum of all positive even values in arr

Explanation:

We have an array named arr holding int values

Inside the method mystery:

Two variables s1 and s2 are initialized as 0

A for loop is created iterating through the arr array. Inside the loop:

num is set to the ith position of the arr (num will hold the each value in arr)

Then, we have an if statement that checks if num is greater than 0 (if it is positive number) and if num mod 2 is equal to 0 (if it is an even number). If these conditions are satisfied, num will be added to the s1 (cumulative sum). If num is less than 0 (if it is a negative number), num will be added to the s2 (cumulative sum).

When the loop is done, the value of s1 and s2 is printed.

As you can see, s1 holds the sum of positive even values in the arr

7 0
3 years ago
Write a Python 3 program to read from a .csv file containing rates from power companies. Your program should determine the avera
aliya0001 [1]

Answer:

In python:

file = open("rates.csv", "r")

ratecount = 0

ratesum = 0

mylist = []

rates = file.readlines()

for nums in rates:

     num = nums.rstrip('\n')

     mylist.append(int(num))

     for i in num:

           ratesum= ratesum + int(i)

           ratecount = ratecount + 1

print("Maximum Rate: "+str(max(mylist)))

print("Minimum Rate: "+str(min(mylist)))

print("Average Rate: "+str(ratesum/ratecount))

Explanation:

This opens the csv file

file = open("rates.csv", "r")

This initializes the number of rates in the file

ratecount = 0

This initializes the sum of the rates

ratesum = 0

This initializes an empty list

mylist = []

This reads the rates into lines

rates = file.readlines()

This iterates through the rates (as a string)

for nums in rates:

This removes the newline character \n in the rates

     num = nums.rstrip('\n')

This appends the rates (as an integer) to the empty list

     mylist.append(int(num))

The following counts the rates in the file and also sum them up

<em>      for i in num: </em>

<em>            ratesum= ratesum + int(i) </em>

<em>            ratecount = ratecount + 1 </em>

This prints the maximum of the rates

print("Maximum Rate: "+str(max(mylist)))

This prints the minimum of the rates

print("Minimum Rate: "+str(min(mylist)))

This calculates and prints the average rate

print("Average Rate: "+str(ratesum/ratecount))

6 0
3 years ago
____ convert a program design developed by a systems analyst or software developer using one of many computer languages.
erica [24]

Answer:

"Programmer " is the correct answer for the following question.

Explanation:

A programmer is a person who created the software They are basically a coder who develop a code for the program or the software. They are specialists in some in the programming code area. The programmer are writing the program for a different kind of software.

The main objective programmer they convert the program design which is developed  by a systems analyst or system designer using a different kind of computer language  

4 0
3 years ago
When I try to add a module into a device, Packet Tracer pop-ups a warning message saying "Cannot add a module when the power is
laiz [17]

plug it into a charger the go to I tunes and it should be there


4 0
3 years ago
True or false
ICE Princess25 [194]
1. True
2. Usually true, but it depends on the search engine you're using.  For example, Google lets you search for several words without commas.
3 0
3 years ago
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