13. What is the suggested rpm on a hard drive for a laptop?

Write a Java test program, named TestGuitar, to create 3different Guitars representing each representing a unique test case and

alina1380 [7]

Answer:

Explanation:

//Guitar.java

import java.awt.Color;

import java.lang.reflect.Field;

import java.util.Random;

public class Guitar

/**

* these two fields are used to generate random note and duration

*/

static char[] validNotes = 'A', 'B', 'C', 'D', 'E', 'F', 'G' ;

static double[] validDuration = 0.25, 0.5, 1, 2, 4 ;

/**

* basic guitar attributes

*/

private int numStrings;

private double guitarLength;

private String guitarManufacturer;

private Color guitarColor;

public Guitar()

/**

* default constructor

*/

numStrings = 6;

guitarLength = 28.2;

guitarManufacturer = Gibson;

guitarColor = Color.RED;

public Guitar(int numStrings, double guitarLength,

String guitarManufacturer, Color guitarColor)

/**

* parameterized constructor

*/

this.numStrings = numStrings;

this.guitarLength = guitarLength;

this.guitarManufacturer = guitarManufacturer;

this.guitarColor = guitarColor;

/**

* required getters and setters

*/

public static char[] getValidNotes()

return validNotes;

public static void setValidNotes(char[] validNotes)

Guitar.validNotes = validNotes;

public static double[] getValidDuration()

return validDuration;

public

4 0

3 years ago

Consider the following definition of a recursive method. public static int mystery(int[] list, int first, int last) { if (first

ozzi

Answer:

c. 27

Explanation:

In recursion method, a method calls itself until a condition becomes true and returned back. In mystery(), at first time, first is 0 and last is 4. Condition is checked and 0!=4 so else part is executed in which again mystery is called with first as 1 and last 4. This will go again and again until first=4.
When first=4 it is also equal to last so if part is executed and alpha[4] is returned which is 9, now it comes alpha[3] +9 which is 8+9 =17 .
It is returning values to its previous calls that is why it will reduce to alpha[0]+alpha[1]+alpha[2]+17 which is nothing but sum of all elements of a alpha
Then, 1+4+5+8+9=27.

5 0

3 years ago

Database developers use the ________ to create relationships in the database.

madreJ [45]

Is it multiple choice ?

7 0

3 years ago

Where might the Null Object pattern be useful?

Tanzania [10]

Answer: Null Object pattern be useful when the absence of an object can be encapsulated by other alternatives which does not have any have any effect.

Explanation:

public interface Rectangle {

double area();

double surfaceare();

boolean isNull();

}

In the code above we have a function for null object. So in the absence of an object we have encapsulated with a method of null which does not do anything. It simplifies the use of dependencies that can be undefined.

In case of collaborator the NULL object pattern makes use of the existing collaboration instead of defining a new one.

It also enable to abstract the handling of null objects from the client so that internal details of the program are not know to outsiders.

5 0

3 years ago

Write a program, named sortlist, that reads three to four integers from the command line arguments and returns the sorted list o

yawa3891 [41]

Answer:

In C++:

void sortlist(char nums[],int charlent){

int Myarr[charlent];

const char s[4] = " ";

char* tok;

tok = strtok(nums, s);

int i = 0;

while (tok != 0) {

int y = atoi(tok);

Myarr[i] = y;

tok = strtok(0, s);

i++;

}

int a;

for (int i = 0; i < charlent; ++i) {

for (int j = i + 1; j < charlent; ++j) {

if (Myarr[i] > Myarr[j]) {

a = Myarr[i];

Myarr[i] = Myarr[j];

Myarr[j] = a;

} } }

for(int j = 0;j<charlent;j++){ printf(" %d",Myarr[j]); }

}

Explanation:

This line defines the sortlist function. It receives chararray and its length as arguments

void sortlist(char nums[],int charlent){

This declares an array

int Myarr[len];

This declares a constant char s and also initializes it to space

const char s[4] = " ";

This declares a token as a char pointer

char* tok;

This line gets the first token from the char

tok = strtok(nums, s);

This initializes variable i to 0

int i = 0;

The following while loop passes converts each token to integer and then passes the tokens to the array

while (tok != 0) {

int y = atoi(tok); -> Convert token to integer

Myarr[i] = y; -> Pass token to array

tok = strtok(0, s); -> Read token

i++;

}

Next, is to sort the list.

int a;

This iterates through the list

for (int i = 0; i < charlent; ++i) {

This iterates through every other elements of the list

for (int j = i + 1; j < charlent; ++j) {

This condition checks if the current element is greater than next element

if (Myarr[i] > Myarr[j]) {

If true, swap both elements

a = Myarr[i];

Myarr[i] = Myarr[j];

Myarr[j] = a;

} } }

The following iteration prints the sorted array

for(int j = 0;j<charlent;j++){ printf(" %d",Myarr[j]); }

}

See attachment for illustration of how to call the function from main

Download cpp

7 0

3 years ago