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Lilit [14]
2 years ago
7

Using the __________ option, you can change the state of a model back to where a particular feature or features weren`t yet crea

ted.
Computers and Technology
1 answer:
aliina [53]2 years ago
7 0

Answer:

Rollback.                            

Explanation:

  • Rollback means to restore something to its previous state.
  • In database rollback operation is used to restore the db to a previous state i.e. it will go back to its previous state.
  • This command is used when you perform some incorrect operation on the database mistakenly which might result in affecting the consistency and integrity of data.
  • Rollback option can be used to cancel or undo a single or a set of transactions to return the database to its previous state. It returns the database into the last committed state.
  • Rollback can also be used in case of system or server crashes. For example a system crashes or a power failure, this option will roll back  or cancel the processes or transactions that were active during that system crash. So in this way the rollback option restores the database in a consistent state.
  • For example, as we know that we can perform certain operations on data stored in a database such as insert, delete, update etc. So lets say we deleted some records of data from a database using DELETE operation but then we change our mind and use ROLLBACK command which will restore the database into its previous state and delete operation will not affect the records.
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Find the maximum value and minimum value in milesTracker. Assign the maximum value to maxMiles, and the minimum value to minMile
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Answer:

Following are th program in the C++ Programming Language.

#include <iostream>//set Header files

using namespace std;//set namespace

//define main function

int main()

{

//set integer constants variable

const int NUM_ROWS = 2;

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const int NUM_COLS = 2;

//set integer type array

int milesTracker[NUM_ROWS][NUM_COLS];

//set integer type variable and initialize to 0

int i = 0;

//set integer type variable and initialize to 0

int j = 0;

//set integer type variable and initialize to -99

int maxMiles = -99;

//set integer type variable and initialize to -99

int minMiles = -99;

//initialize the value in the two dimensional array

milesTracker[0][0] = -10;

milesTracker[0][1] = 20;

milesTracker[1][0] = 30;

milesTracker[1][1] = 40;

//here is the solution  

maxMiles = milesTracker[0][0];

minMiles = milesTracker[0][0];

/*set for loop to find the minimum miles and maximum miles*/

for (i = 0; i < NUM_ROWS; i++)

{

 for (j = 0; j < NUM_COLS; j++)

 {

 //set if condition for maxMiles is the bigger than

   if (milesTracker[i][j] > maxMiles)

   //initialize milesTracker[i][j] to maxMiles

     maxMiles = milesTracker[i][j];

   //set if condition for minMiles is the smaller than

   if (milesTracker[i][j] < minMiles)

   //initialize milesTracker[i][j] to maxMiles

     minMiles = milesTracker[i][j];

 }

}

//print output

cout << "Min miles: " << minMiles << endl;

//print output

cout << "Max miles: " << maxMiles << endl;

return 0;

}

<u>Output:</u>

Min miles: -10

Max miles: 40

Explanation:

Here, we define the main method and inside it:

  • set two constant integer type variable and initialize to 2
  • set integer type two-dimensional array and pass constant variables in it.
  • Set two integer type variable and initialize to 0 then, again set two integer type variable and initialize to -99.
  • Initialize the values in the two-dimensional array.
  • Set two for loop for the two-dimensional array to find the minimum and maximum miles.
  • Set two if condition to find bigger or smaller miles.

Finally, print the maximum and the minimum miles then, return 0.

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