What type of light comes from reflections off other objects?

Which of these statements regarding time-cost tradeoffs in CPM networks is true?

g100num [7]

Answer:

B. Crashing is not possible unless there are multiple critical tasks.

8 0

3 years ago

Design and code a program including the following classes, as well as a client class to test all the methods coded:A Passenger c

sergeinik [125]

Answer:

Code given below

Explanation:

/*

* Class to hold the Passenger data

* Stores the name and classOfService

* */

public class Passenger {

String name;

int classOfService;

public Passenger(String string, int classOfService) {

this.name = string;

this.classOfService = classOfService;

}

@Override

public String toString() {

return "Passenger [name=" + name + ", classOfService=" + classOfService

+ "]";

}

@Override

public int hashCode() {

final int prime = 31;

int result = 1;

result = prime * result + classOfService;

result = prime * result + ((name == null) ? 0 : name.hashCode());

return result;

}

@Override

public boolean equals(Object obj) {

if (this == obj)

return true;

if (obj == null)

return false;

if (getClass() != obj.getClass())

return false;

Passenger other = (Passenger) obj;

if (classOfService != other.classOfService)

return false;

if (name == null) {

if (other.name != null)

return false;

} else if (!name.equals(other.name))

return false;

return true;

}

public String getName() {

return name;

}

public int getClassOfService() {

return classOfService;

}

----

import java.util.ArrayList;

import java.util.List;

/* Train class for holding the

* passengerList.

* The passengerList is the list of Passenger Object

*/

public class Train {

List<Passenger> passengerList;

public Train() {

passengerList = new ArrayList<Passenger>();

}

public Passenger getPassenger(int index) {

if (index <= 0 && getTotalNumberOfPassengersOnBoard() < index) {

return null;

} else {

return passengerList.get(index - 1);

}

public void addPassenger(Passenger p) {

passengerList.add(p);

}

public int getTotalNumberOfPassengersOnBoard() {

return passengerList.size();

}

public boolean isPassengerOnBoard(String name) {

boolean flag= false;

for (Passenger p : passengerList) {

if (p.getName().equalsIgnoreCase(name)) {

flag = true;

break;

} else {

flag = false;

}

return flag;

}

public double getRevenue(double priceFirstClass, double priceSecondClass) {

double total = 0.0;

for (Passenger p : passengerList) {

if (p.getClassOfService() == 1) {

total += priceFirstClass;

} else {

total += priceSecondClass;

}

return total;

}

public double getPercentageFirstClassTravellers() {

double count = 0.0;

for (Passenger p : passengerList) {

if (p.getClassOfService() == 1) {

count++;

}

return count / getTotalNumberOfPassengersOnBoard() * 100;

}

@Override

public String toString() {

return "Train [passengerList=" + passengerList + "]";

}

@Override

public int hashCode() {

final int prime = 31;

int result = 1;

result = prime * result

+ ((passengerList == null) ? 0 : passengerList.hashCode());

return result;

}

@Override

public boolean equals(Object obj) {

if (this == obj)

return true;

if (obj == null)

return false;

if (getClass() != obj.getClass())

return false;

Train other = (Train) obj;

if (passengerList == null) {

if (other.passengerList != null)

return false;

} else if (!passengerList.equals(other.passengerList))

return false;

return true;

}

-----------

public class TrainTest {

public static void main(String[] args) {

Train t = new Train();

Passenger p1 = new Passenger("James", 1);

Passenger p2 = new Passenger("Sarah", 2);

Passenger p3 = new Passenger("Jhon", 1);

Passenger p4 = new Passenger("Test", 2);

// add other passengers Test1 .. Test6

for (int j = 1; j < 7; j++) {

t.addPassenger(new Passenger("Test" + j, j % 2));

}

t.addPassenger(p1);

t.addPassenger(p2);

t.addPassenger(p3);

t.addPassenger(p4);

System.out.println("total revenue $" + t.getRevenue(10.0, 25.0));

System.out.println("total number of passengers on Board .. "

+ t.getTotalNumberOfPassengersOnBoard());

System.out.println("percentage of first class traveller .. "

+ t.getPercentageFirstClassTravellers());

System.out.println("getPassenger number # 2 .. " + t.getPassenger(2));

System.out.println("is passenger Jhon on board ? "

+ t.isPassengerOnBoard("Jhon"));

System.out.println("is passenger Dummy on board ? "

+ t.isPassengerOnBoard("Dummy"));

System.out.println("Printing all the Passengers on Board ...");

for (int i = 1; i <= t.getTotalNumberOfPassengersOnBoard(); i++) {

System.out.println("" + t.getPassenger(i));

}

// using the the Train toString to print all the passengers from Train

System.out.println(t.toString());

}

8 0

3 years ago

In early PCs, a DIMM in any one of the DIMM slots could fill the 64-bit bus; therefore, each slot was called a(n) ______________

Svetach [21]

Answer:

The correct answer to the following question will be Option A (Bank).

Explanation:

Sometimes on a motherboard, the memory modules are grouped into different groups and that each group is named as a branch. Furthermore, the term "bank" may be used loosely to describe a basic computing data storage area. When the record is stored in the database it can be accessed at a specific time by the user.
Because the 486 is a 32-bit processor and a 30-pin SIMM is 8-bit, four SIMMs (8x4=32) is called a bank when installing memory on an 80486 processor computer; Install four 16 MB SIMMs when upgrading to 64 MB.

Therefore, Option A is the right answer.

3 0

3 years ago

Letter Frequency Write a function that will take a string and return a count of each letter in the string. For example, "my dog

Nostrana [21]

Answer:

Check the explanation

Explanation:

Code to copy:

// ConsoleApplication7.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include <iostream>

#include <cstring>

#include <string>

using namespace std;

int * letterFrequency(char s[]);

int main()

{

int *freq_letters;

char *s = new char[100];

freq_letters = new int[26];

//To read the input string in order to find the frequency of each letter

cout << "Enter a string: ";

cin.getline(s, ' ');

//call the function to find the occurrence of each alphabet

freq_letters = letterFrequency(s);

//Display the count

cout << "Letter Frequency " << endl;

for (int i = 0; i < 26; i++)

{

//Constriant to check if the letter appeared at least once in the string and so printing the frequency of its occurence

if (freq_letters[i] != 0)

cout << " " << static_cast<char>(i + 'a') << " " << freq_letters[i] << endl;

}

system("pause");

return 0;

}

//Define the function to find occurrence of each letter in the input string

int * letterFrequency(char s[])

{

int *occurrence_array;

//to store the output of occurrences for each alphabet

occurrence_array = new int[26];

// to store the count of occurrence for each letter temporarily

int letter_count;

// for loop to check the occurrence for all 26 alphabets

for (int i = 0; i < 26; i++)

{

letter_count = 0;

for (int j = 0; j < strlen(s); j++)

{

/*comparing the ascii values of each alphabet with every character from the string by converting it to lower case i.e. case insensitive*/

if (int('a') + i == int(tolower(s[j])))

letter_count++;

}

occurrence_array[i] = letter_count;//To store the count calculated for each alphabet

}

return occurrence_array;

}

The following below code screenshot and output shows that when the string is entered, the output will shows each lettercount irrespective of whether the letter is in capitals or small and does not count non-letter characters (i.e spaces, punctuations etc.)

6 0

4 years ago

Variance for accumulator. Validate that the following code, which adds the

Art [367]

Using the knowledge of computational language in JAVA it is possible to write a code that Validate that the following code, which adds the methods var() and stddev() to Accumulator, computes both the mean and variance of the numbers presented as arguments to addDataValue()

<h3>Writting the code:</h3>

import java.util.*;

public class Accumulator {

private static double m;

private static double v;

private static double st;

private static double s[]=new double[5];

private static int N;

private static int count =0;

public static void main(String[] args) {

// TODO Auto-generated method stub

Random r = new Random();

System.out.println("hello world");

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

double randomvalue = r.nextDouble();

addDataValue(randomvalue);

}

for(int i=0;i<s.length;i++) {

System.out.println("dataValue:"+s[i]);

}

mean();

System.out.println("mean:"+m);

var();

System.out.println("variance:"+v);

stddev();

System.out.println("standard deviation:"+st);

}

public static void addDataValue(double value) { // addes data values to array

s[count]=value;

count++;

}

public static double mean() { // returns mean

double sum=0.0;

for(int i=0;i<s.length;i++) {

sum+=s[i];

}

m = sum/s.length;

return m;

}

public static double var() { //returns variance

double mm = mean();

double t = 0;

for(int i=0;i<s.length;i++) {

t+= (s[i]-mm)*(s[i]-mm);

}

v= t/(s.length-1);

return v;

}

public static double stddev() { // returnsn the stardard deviation

st= Math.sqrt(var());

return st;

}

See more about JAVA at brainly.com/question/12975450

#SPJ1

3 0

1 year ago