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Quiz Submissions - PRACTICE Final Test
TrongNghia Dao (username: trod)
Attempt 1
Written: Apr 9, 2019 6:12 PM - Apr 10, 2019 9:28 PM
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Theory Questions
For the questions in this section, you are not permitted to use a C++ compiler.

Question 1		1 / 1 point
What is the output of the following C++ code?

const int NUM_ROWS = 3;

const int NUM_COLS = 2;



int stuff[NUM_ROWS][NUM_COLS] = { {2, 6}, {3, 1}, {5, 4} };

int row = 0, col = 0;



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

{

    for (int j = 0; j < NUM_COLS; j++)

    {

        if (stuff[i][j] > stuff[row][col])

        {

            row = i;

            col = j;

        }

    }

}

cout << row << " " << col << endl;


1 0


1 2


2 1


0 1

Question 2		0 / 2 points
Fill in the missing parts (marked as ???) of the XML comment for the following function.

/// <summary>Number of columns in the 2-D array of doubles</summary>

const int COL_SIZE = 3;



/// <summary>

/// ???

/// </summary>

/// <param name="numbers">2-D array of doubles</param>

/// <param name="row_size">Number of rows in the 2-D array of doubles</param>

/// <returns>???</returns>

int doSomething(double numbers[][COL_SIZE], int row_size)

{

    int count = 0;



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

    {

        for (int j = 0; j < COL_SIZE; j++)

        {

            if ((numbers[i][j] - (int)numbers[i][j]) > 0)

            {

                count++;

                numbers[i][j] = (int)numbers[i][j];

            }

        }

    }



    return count;

}

1st ?:
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Question 3		0 / 2 points
Fill in the missing parts (marked as ???) of the XML comment for the following function.

/// <summary>

/// ???

/// </summary>

/// <param name="numbers">Integer array</param>

/// <param name="size">Number of elements in the integer array</param>

void doSomething(int numbers[], int size)

{

    int temp;



    for (int pass = 0; pass < size - 1; pass++)

    {

        for (int i = 0; i < size - pass - 1; i++)

        {

            if (numbers[i] > numbers[i + 1])

            {

                temp = numbers[i];

                numbers[i] = numbers[i + 1];

                numbers[i + 1] = temp;

            }

        }

    }

}

- No text entered -
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Question 4		4.5 / 5 points
Which of the following statements are valid array declarations?  Select all that apply.

Correct Answer
int numbers[10] = { 1, 2, 3, 4 };

Correct Answer
short* heights = new short[50];

Correct Answer
char food[] = "bacon";


int nums[] = (3, 4, 3, 2);


bool cool[];

Correct Answer
double points[] = { 2.3, 4.5, 6.6, 4.6, 5.9 };

Correct AnswerIncorrect Response
string names[30];


double[15] scores;


char name[8] = "Aloysius";


int* grades = new int[];

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Question 5		2.5 / 4 points
Which of the following statements are true?  Select all that apply.


A destructor is a special member function that is called automatically whenever an object is created.


Instance variables are class data members that are shared by all objects of the class.

Correct AnswerIncorrect Response
A "magic number" is a literal constant with unexplained meaning.

Correct Answer
Where possible, it is a good idea to eliminate duplicated code.

Correct AnswerIncorrect Response
Data members that are shared by all objects of a class must be static.

Incorrect Response
static member functions can access instance data members, as long as the instance data member values are not modified.

Correct Answer
Class member functions that do not modify any data members should be const.


Any attempt to modify the value of a const data member will result in a run-time error.

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Question 6		5 / 5 points
Consider the following C++ code:

  int nums[] = { 1, 2, 3, 4 };

  int *iPtr;



  iPtr = nums;

  (*iPtr)++;



  iPtr++;

  (*iPtr) += 10;



  iPtr += 2;

  (*iPtr) *= 10;



After this code has executed, what would be the printed output of each of the following statements?

  std::cout << nums[0];

___2___(20 %)
  std::cout << nums[1];

___12___(20 %)
  std::cout << nums[2];

___3___(20 %)
  std::cout << nums[3];

___40___(20 %)
  std::cout << *iPtr;

___40___(20 %)
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Question 7		1 / 1 point
What is the output of the following C++ code?

int stuff[10] = {1, 2, 3, 4};



std::cout << stuff[9];


9


0


Output is unpredictable


4

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Question 8		1 / 1 point
Which of the following is a declaration for a function that returns nothing and accepts the following parameters:

a character passed by value
an integer passed by pointer
a float passed by reference

void func(char&, int, float*);


void func(char, int*, float&);


void func(char*, int&, float);


void func(char, int*, float*);

Question 9		4 / 4 points
Fill in the blanks to complete the output of the following C++ program:

#include <iostream>



int func(int x, int *y, int &z)

{

    int* p = &x;



    x += 1;

    *p += 1;

    *y += 2;

    z += 3;



    return (x + *p + *y + z);

}



int main(void)

{

    int a = 1, b = 1, c = 1, d = 1;



    d = func(a, &b, c);



    std::cout << "The value of a is " << a << "\n";

    std::cout << "The value of b is " << b << "\n";

    std::cout << "The value of c is " << c << "\n";

    std::cout << "The value of d is " << d << "\n";



    system("pause");

    return 0;

}



Program output:


The value of a is ___1___(25 %)

  The value of b is ___3___(25 %)

  The value of c is ___4___(25 %)

  The value of d is ___13___(25 %)
Question 10		2.5 / 5 points
Consider the following class definition and object declaration.

class CricketBowler

{

private:

    static int numBowlers;

    int wickets;

    int runs;

public:

    CricketBowler();

    ~CricketBowler();

    void addWicket(void);

    void addRun(void);

    float getAverage(void) const;

    static int getNumBowlers(void);

private:

    void setWickets(int wickets);

    void setRuns(int runs);

};

CricketBowler ZaheerZhan;

Which of the following expressions and statements are valid?   Select all that apply.


ZaheerZhan.runs = 12;

Incorrect Response
ZaheerZhan.addRun(5);

Incorrect Response
CricketBowler::numBowlers

Correct Answer
ZaheerZhan.getNumBowlers()


CricketBowler AnilKumble(0, 0);

Correct AnswerIncorrect Response
ZaheerZhan.getAverage()

Incorrect Response
CricketBowler::addRun();

Correct Answer
ZaheerZhan.addWicket();


ZaheerZhan.setWickets(20);

Correct AnswerIncorrect Response
CricketBowler::getNumBowlers()

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Practical Questions
For the questions in this section, you are permitted to use a C++ compiler.

Question 11		0 / 30 points
Implement a C++ class named Player that represents a player on a sports team.

The Player class must have the following data members:

A string named firstName that represents the player's first name.
A string named lastName that represents the player's last name.
An int named goals that represents the total number of goals the player has scored.
An int named assists that represents the total number of assists the player has earned.
An int named gamesPlayed that represents the total number of games the player has played.
An int named numPlayers that represents the total number of Player objects that currently exist.
The Player class must have the following member functions:

A no-arg constructor that sets the player's name to "John Doe", and sets the player's goals, assists, and games played all to zero.
A constructor that accepts (in order) the player's first and last names as parameters, and sets the player's goals, assists, and games played all to zero.
A constructor that accepts (in order) the player's first name, last name, goals, assists, and games played.
Getter functions for all data members.
Setter functions for all data members (except numPlayers).
A function addGoal() that increments the player's goals by one.
A function addAssist() that increments the player's assists by one.
A function addGamePlayed() that increments the number of games the player has played by one.
A function getPoints() that returns an int value representing how many points (goals + assists) the player has.
A function getFullName() that returns the player's full name as a single string.
A function getPointsPerGame() that returns a double value representing the average number of points the player earns each game.
A function printStats() that prints the player's goals, assists, points, and points per game, formatted as shown in the program output below.
Additional requirements:

Separate the definition and implementation of the Player class into a .cpp file and a .h file.
Designate the members of the Player class as private or public as appropriate.
Use the const keyword for the members of the Player class as appropriate.
Use the static keyword for the members of the Player class as appropriate.
Include logic to prevent the class user from setting data members to invalid values, for example, do not allow goals to have a negative value.
Include logic to prevent against invalid arithmetic operations, for example, dividing by zero.
Use the following program to test your Player class.

#include <iostream>

#include <string>

#include "Player.h"



int main(void)

{

    Player p1;



    Player p2("John", "Tavares");

    p2.setGoals(47);

    p2.setAssists(41);

    p2.setGamesPlayed(81);



    Player p3("Mitchell", "Marner", 25, 66, 80);

    p3.addGoal();

    p3.addAssist();

    p3.addGamePlayed();



    Player p4("Astin", "Mathew", 37, 35, 67);

    p4.setFirstName("Auston");

    p4.setLastName("Matthews");



    std::cout << "Number of players: " << Player::getNumPlayers() << "\n";

    p1.printStats();

    p2.printStats();

    p3.printStats();

    p4.printStats();



    system("pause");

    return 0;

}



Program Output:

Number of players: 4

Player Name: John Doe
GP   G    A    PTS  PTS/G
0    0    0    0    0

Player Name: John Tavares
GP   G    A    PTS  PTS/G
81   47   41   88   1.08642

Player Name: Mitchell Marner
GP   G    A    PTS  PTS/G
81   26   67   93   1.14815

Player Name: Auston Matthews
GP   G    A    PTS  PTS/G
67   37   35   72   1.07463

Copy/paste only the source code for your Player class below.

// Paste code from Player.h below this

class Player
{
public:
    Player(int value);
    ~Player();
    string firstName(void) const;
    string lastName(void) const;
    int goals(void) const;
    void setValue(int);
    int assists(void) const;
    int gamesPlayed(void) const;
    bool equals(int) const;
    bool equals(const MyInteger&) const;
    int numsPlayed(void) const;
    static bool isEven(int);
    static bool isOdd(int);
private:
    int value;
};
// Paste code from Player.cpp below this


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Question 12		0 / 20 points
Implement a C++ function named getPlayerNames() that:

Accepts the following four parameters (in order):
A string named teamName that represents the name of the team
An integer named numPlayers that represents the number of players on the team
A string named longestName that represents the player's name that has the most characters
A string named shortestName that represents the player's name that has the least characters

Returns a pointer to a 1-dimensional array of string objects that represent the player's names.

Implements the following functionality:
Creates a dynamic array of string objects that represent the player's names, sized to hold names for exactly the number of players specified by numPlayers
Asks the user to enter the names of the player on the specified team, and puts the names into the array
Determines which name in the array has the most characters and assigns the name to longestName
Determines which name in the array has the least characters and assigns the name to shortestName
Note: If there are multiple shortest/longest player names with the same number of characters, select any one of them as the shortest/longest name.
Additional requirements:

Pass parameters to the getPlayerNames() function by value and by reference as appropriate.
Use the const and static keywords as appropriate.
Document the getPlayerNames() function using XML comments.
Use the following program to test your getPlayerNames() function.

#include <iostream>

#include <string>
#include <limits>

using namespace std;



// *** Put your getPlayerNames() function here ***



int main(void)

{

    string* playerNames, longName, shortName, teamName;

    int numPlayers;



    // Get team name from the user

    cout << "Enter the team name: ";

    getline(cin, teamName);



    // Get number of players from the user

    cout << "Enter number of players: ";

    cin >> numPlayers;



    // Flush the input buffer

    cin.ignore(numeric_limits<streamsize>::max(), '\n');



    // Get player's names from the user

    playerNames = getPlayerNames(teamName, numPlayers, longName, shortName);



    // Output longest/shortest player names

    std::cout << "Longest player name: " << longName << "\n";

    std::cout << "Shortest player name: " << shortName << "\n";



    delete[] playerNames;



    system("pause");

    return 0;

}



Example Program Output:
Enter the team name: Peterborough Petes
Enter number of players: 5
Enter the names of 5 players on the Peterborough Petes (press Enter after each name):
Ryan Merkley
Zach Gallant
John Parker-Jones
Liam Kirk
Semyon Der-Arguchintsev
Longest player name: Semyon Der-Arguchintsev
Shortest player name: Liam Kirk

// Copy/paste only the source code for your getPlayerNames() function here.

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Attempt Score:
21.5 / 80 - 26.88 %
Overall Grade (highest attempt):
21.5 / 80 - 26.88 %