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goldfiish [28.3K]
3 years ago
14

For an external usb hard drive attached to a computer, which is more suitable: a writethrough cache or a block cache

Computers and Technology
2 answers:
Charra [1.4K]3 years ago
6 0

Disk access is way slower than memory access. Caching is a technique to improve the disk access time.  Block cache is a caching technique which reduces disk accesses time.  Here a portion of disk is bought to cache for reading and a modified blocks are first changed in cache but reflected in the disk at one go.  On the other hand with write through caching each modified block is written to cache and at the same time it is written to the disk.  Write- through caching requires more disk I/O so they can have a negative effect on the performance. 

Stolb23 [73]3 years ago
3 0

Answer:

block cache

Explanation:

    An integrated cache is a layer of memory that automatically caches frequently accessed data through the source database.

    Block cache is used to store blocks read from disks. This means that a small buffer cache will cause Oracle to cache data blocks following the LAST RECENTLY USED list, and depending on how often this happens, can lead to a drop in performance.

    There is no magic to sizing the block cache, what you usually do is estimate an initial size and monitor the hit, if it is not optimal, you will need to lengthen and repeat the monitoring cycle.

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Question: 4/8
Gemiola [76]

The generated test cases for the function assuming another developer coded the function is given below in a C++ program.

<h3>THE CODE</h3>

#include <iostream>  

#include <iomanip>

#include <string>

using namespace std;

// define the data type "triangletype" with {values}

enum triangleType { scalene, isosceles, equilateral, noTriangle };

// Prototype function which returns the position of triangleType{value}

// Example: Scalene = 0, isosceles = 1, etc. These are zero indexed.

triangleType triangleShape(double a, double b, double c);

// Prototype function which takes the integer value of the

// triangle type and outputs the name of triangle

string shapeAnswer(int value);

int main() {

   double inputA;

   double inputB;

   double inputC;

   cout << "To determine whether a triangle is either:" << endl;

   cout << setw(50) << " - Scalene" << endl; // Unequal in length

   cout << setw(52) << " - Isosceles" << endl; // Two sides equal length

   cout << setw(54) << " - Equilateral" << endl; // All sides equal

   cout << setw(57) << " - Not a triangle" << endl;

   cout << "Enter side A: ";

   cin >> inputA;

   cout << "Enter side B: ";

   cin >> inputB;

  cout << "Enter side C: ";

   cin >> inputC;

   cout << "The triangle is " << shapeAnswer(triangleShape(inputA, inputB, inputC)) << endl;

}

triangleType triangleShape(double a, double b, double c) {

   triangleType answer;

   if ( c >= (a + b) || b >= (a + c) || a >= (b + c) ) {

       answer = noTriangle;

   }

   else if (a == b && b == c) {

       answer = equilateral;

   }

   // Test the 3 options for Isosceles equality

   else if ( (a == b) && (a != c) || (b == c) && (b != a) || (a == c) && (a != b) ) {

       answer = isosceles;

   }

   else {

       answer = scalene;

   }

   return answer;

}

string shapeAnswer(int value) {

   string answer;

  switch (value) {

   case 0:

       answer = "Scalene";

       break;

   case 1:

       answer = "Isosceles";

       break;

   case 2:

       answer = "Equilateral";

       break;

   case 3:

       answer = "Not a triangle";

       break;

   default:

       break;

   }

   return answer;

}

Read more about C++ programs here:

brainly.com/question/20339175

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Answer:

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Explanation:

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Answer:

Nope

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CLS

INPUT “ENTER FIRST NUMBER”; A

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PRINT “AVERAGE OF THREE NUMBERS”; AV

END

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