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asambeis [7]
3 years ago
15

The first operating systems, in the 1950s, were designed for _____.

Computers and Technology
1 answer:
Leya [2.2K]3 years ago
7 0

They were designed for batch processing.

Explanation

In the beginning, around the 1940s, electronic computers were built without Operating systems. These computers could not do basic calculations, read and write data, or run programs. Setbacks such as these led to the development of operating systems.

The first one was introduced in the early to mid-1950, and it relied on the batch processing systems to facilitate submission of data into groups. Rather than processing tasks individually, this system processed tasks in batches. Upon the completion of a job, the batch would head over to the OS’s software. The software would then dump the state of the active task and open the next one. This helped reduce operator intervention and time wastage.

Learn more:

  • How does operating systems work when passing parameters to kernel. brainly.com/question/6062548

#LearnwithBrainly

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Match the items with their respective descriptions. to navigate between worksheets to protect a worksheet to change the position
Rzqust [24]
To navigate between worksheets
press Ctrl and Page Up or Page Down keys

to protect a worksheet
select a password

to change the position of a worksheet
drag the worksheet tab to the new position

to rename a worksheet
double-click the worksheet tab
8 0
3 years ago
What is the function of tab?<br>​
Sholpan [36]

Answer:

The function of the tab is used to advance the cursor to the next tab key.

5 0
1 year ago
Write a program to calculate the great circle distance between two points on the surface of a sphere. If p1(x1, y1) and p2(x2,y2
Tamiku [17]

Answer:

import java.lang.*;

public class distance { public static double distance(double latitude1,

                                     double latitude2, double longitude1,

                                     double longitude2)

       {

      // Convert Latitude and Longitude to Radians

           longitude1 = Math.toRadians(longitude1);

           longitude2 = Math.toRadians(longitude2);

           latitude1 = Math.toRadians(latitude1);

           latitude2 = Math.toRadians(latitude2);

           

           double d_longitude = longitude2 - longitude1;

           double d_latitude = latitude2 - latitude1;

           double a = Math.pow(Math.sin(d_latitude / 2), 2)

                   + Math.cos(latitude1) * Math.cos(latitude2)

                   * Math.pow(Math.sin(d_longitude / 2),2);

           double val = 2 * Math.asin(Math.sqrt(a));

           // Radius of earth in kilometers is 6371

           double earth_radius = 6371;

           // Calculate and return the distance

           return(val * earth_radius);

       }

       // Main Method

       public static void main(String[] args)

       {

           double latitude1 = 67.32055555555556;

           double latitude2 = 83.31861111111111;

           double longitude1 = -1.7217899;

           double longitude2 = -1.6567799;

           System.out.println(distance(latitude1, latitude2,

                   longitude1, longitude2) + " K.M");

       }

   }

Explanation:

This program is implemented in Java programming language

The formula for the shortest distance between two points on the earth is:

Distance = 3963.0 * arccos[(sin(lat1) * sin(lat2)) + cos(lat1) * cos(lat2) * cos(long2 – long1)]

The latitude and longitude of the two points must be known

The latitude and longitude are converted into radians using built in methods in java.

Take value for the radius of the earth in Kilometers  6371;

Note that a seperate method has been created to calculate the distance

In the driver method (main), values for latitude and logitudes for both places have been hard-corded, then the method distance is called and passed those values

Note also that the distance has been calculated in Kilometers

8 0
3 years ago
Create an array of doubles to contain 5 values Prompt the user to enter 5 values that will be stored in the array. These values
Gre4nikov [31]

Solution :

$\#$include $$  

$\#$include $$    

void parse$\_$name($char \ full[]$, char first$[],$ char last$[])$

{

// to_get_this_function_working_immediately, _irst

// stub_it_out_as_below._When_you_have_everything_else

// working,_come_back_and_really_parse_full_name

// this always sets first name to "Noah"

int i, j = 0;

for(i = 0; full[i] != ' '; i++)

  first[j++] = full[i];

first[j] = '\0';  

// this always sets last name to "Zark"

j = 0;

strcpy(last, full+i+1);

// replace the above calls with the actual logic to separate

// full into two distinct pieces

}

int main()

{

char full[40], first[20], last[20];

double hours[5];

// ask the user to enter full name

printf("What is your name? ");

gets(full);

// parse the full name into first and last

parse_name(full, first, last);

// load the hours

for(int i = 0; i < 5; i++)

{

   printf("Enter hours for day %d: ", i+1);

   scanf("%lf", &hours[i]);

}

// create the time card

FILE* fp = fopen("timecard.txt", "w");

fprintf(fp, "First Name: %s\n", first);

fprintf(fp, "Last Name: %s\n", last);

double sum = 0.0;

for(int i = 0; i < 5; i++)

{

   fprintf(fp, "Day %i: %.1lf\n", i+1, hours[i]);

   sum += hours[i];

}

fprintf(fp, "Total: %.1f\n", sum);    

printf("Timecard is ready. See timecard.txt\n");

return 0;

}

3 0
3 years ago
The Advanced Encryption Standard (AES) symmetric cipher uses how many rounds of substitution and re-arranging when utilizing a 2
andrew-mc [135]

Answer:

The answer is "13 rounds"

Explanation:

It is a code, family known as encryption methods of the unit. It is a block template, which uses a per-block encryption algorithm, and it usually measured in a bit for every block.  It was accepted by the NIST at the end of 2000 as a replacement for DES.  

  • In this encryption process, it implemented on 3 different steps on each of the clear text keys.
  • In step 2 a variety of cycles based on the key type are preformed, and in  9 rounds are done on a 128-bit key, 11 rounds are done on a 192-bit key and 13 rounds on a 256-bit key called the AES-256 key.

7 0
3 years ago
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