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charle [14.2K]
2 years ago
3

If relation R and relation S are both 32 pages and round-robin partition over 2 machines with 4 buffer pages each, what is the n

etwork cost (number of bytes sent over the network by any machine) for performing a sort-merge join in the worst case
Computers and Technology
1 answer:
wolverine [178]2 years ago
5 0

Answer:

224

Explanation:

There's need for us to read the data from disk after which we now stream the data to the appropriate machine, the machine will then performs a sort-merge join between two 16page relations with 4 buffer pages.

So, this Will be = (1 + 6) * (16 + 16) = 224 I/Os per machine.

You might be interested in
Import java.util.scanner; public class sumofmax { public double findmax(double num1, double num2) { double maxval; // note: if-e
jeyben [28]

Here you go,


Import java.util.scanner

public class SumOfMax {

   public static double findMax(double num1, double num2) {

       double maxVal = 0.0;

       // Note: if-else statements need not be understood to

       // complete this activity

       if (num1 > num2) { // if num1 is greater than num2,

           maxVal = num1; // then num1 is the maxVal.

       }

       else { // Otherwise,

           maxVal = num2; // num2 is the maxVal.

       }

       return maxVal;

   }

   public static void main(String[] args) {

       double numA = 5.0;

       double numB = 10.0;

       double numY = 3.0;

       double numZ = 7.0;

       double maxSum = 0.0;

       /* Your solution goes here */

       maxSum = findMax(numA, numB); // first call of findMax

       maxSum = maxSum + findMax(numY, numZ); // second call

       System.out.print("maxSum is: " + maxSum);

       return;

   }

}

/*

Output:

maxSum is: 17.0

*/

6 0
2 years ago
Write the definition of a function printAttitude, which has an int parameter and returns nothing. The function prints a message
Oksana_A [137]

Answer:

The function definition, in cpp, for the function printAttitude is given below.

void printAttitude(int n)

{

switch(n)

{

case 1: cout<<"disagree"<<endl; break;

case 2: cout<<"no opinion"<<endl; break;

case 3: cout<<"agree"<<endl; break;

default: break;

}

}

Explanation:

As seen, the method takes an integer parameter.

The method does not returns any value hence, return type is void.

The message is displayed to the console using switch statement which executes on the integer parameter, n.

The values for which output needs to be displayed are taken in cases.

The values for which no output needs to be displayed, is taken in default case.

Every case ends with break statement so that the program execution can be terminated.

This method can be used inside a program as shown.  

PROGRAM

#include <iostream>

using namespace std;

void printAttitude(int n)

{

switch(n)

{

case 1: cout<<"disagree"<<endl; break;

case 2: cout<<"no opinion"<<endl; break;

case 3: cout<<"agree"<<endl; break;

default: break;

}

}

int main() {

// variables to hold respective value

int n;

// user input taken for n

cout<<"Enter any number: ";

cin>>n;

// calling the function taking integer parameter  

printAttitude(n);

return 0;

}

OUTPUT

Enter any number: 11

1. The user input is taken for the integer parameter.

2. Inside main(), the method, printAttitude(), is then called and the user input is passed as a parameter.

3. Since the user entered value is 11 which does not satisfies any of the values in the cases, the default case is entered which does nothing and executes the break statement.

4. Hence, the program displays nothing for the value of 11.

5. When the user enters value 3, the case statement is executed since 3 satisfies one of the case values.

6. The program output for the user input of 3 is as shown below.

OUTPUT

Enter any number: 3

agree

The program ends with return statement.

4 0
2 years ago
Steven is an advertising executive at a large auto parts company. He uses his google ads recommendations page to help him with s
lana [24]

Answer:

Apply recommendations across the multiple layers of his advertising strategies.

Explanation:

In the given statement, Steven is an employee of an organization of auto parts and he uses own google advertisement page for the purpose of strategies to make perfect he owns advertisement campaigns for the google search. He values the scores of the optimization because Steve applies charge over the different layers of his ads strategies.

4 0
2 years ago
Write a program to input value of three sides, to check triangle is triangle is possible to form of not​
NeTakaya

Answer:

Explanation:

import java.util.Scanner;

public class KboatTriangleAngle

{

  public static void main(String args[]) {

      Scanner in = new Scanner(System.in);

      System.out.print("Enter first angle: ");

      int a1 = in.nextInt();

      System.out.print("Enter second angle: ");

      int a2 = in.nextInt();

      System.out.print("Enter third angle: ");

      int a3 = in.nextInt();

      int angleSum = a1 + a2 + a3;

       

      if (angleSum == 180 && a1 > 0 && a2 > 0 && a3 > 0) {

          if (a1 < 90 && a2 < 90 && a3 < 90) {

              System.out.println("Acute-angled Triangle");

          }

          else if (a1 == 90 || a2 == 90 || a3 == 90) {

              System.out.println("Right-angled Triangle");

          }

          else {

              System.out.println("Obtuse-angled Triangle");

          }

      }

      else {

          System.out.println("Triangle not possible");

      }

  }

}

OUTPUT:

3 0
2 years ago
You are responsible for a rail convoy of goods consisting of several boxcars. You start the train and after a few minutes you re
maks197457 [2]

Answer:

The program in C++ is as follows:

#include <iostream>

#include <iomanip>

using namespace std;

int main(){

   int cars;

   cin>>cars;

   double weights[cars];

   double total = 0;

   for(int i = 0; i<cars;i++){

       cin>>weights[i];

       total+=weights[i];    }

   double avg = total/cars;

   for(int i = 0; i<cars;i++){

       cout<<fixed<<setprecision(1)<<avg-weights[i]<<endl;    }

   return 0;

}

Explanation:

This declares the number of cars as integers

   int cars;

This gets input for the number of cars

   cin>>cars;

This declares the weight of the cars as an array of double datatype

   double weights[cars];

This initializes the total weights to 0

   double total = 0;

This iterates through the number of cars

   for(int i = 0; i<cars;i++){

This gets input for each weight

       cin>>weights[i];

This adds up the total weight

       total+=weights[i];    }

This calculates the average weights

   double avg = total/cars;

This iterates through the number of cars

   for(int i = 0; i<cars;i++){

This prints how much weight to be added or subtracted

       cout<<fixed<<setprecision(1)<<avg-weights[i]<<endl;    }

4 0
1 year ago
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