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CPA – Programming Essentials in C++ Module 2 Exam Answers

CPA – Programming Essentials in C++ Module 2 Exam Answers

Question1 What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    int i = 1, j = i++, k = –i;

    if(i > 0) {

        j++;

        k++;

    }

    else {

        k++;

        i++;

    }

    if(k == 0) {

        i++;

        j++;

    }

    else {

        if(k > 0)

            k–;

        else

            k++;

        i++;

    }

    cout << i * j * k;

  • 4
  • 5
  • 2
  • 3

Question2 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

        int a = 2;

        switch(a << a) {

            case 8 : a++;

            case 4 : a++;

            case 2 : break;

            case 1 : a–;

        }

        cout << a;

}

  • 3
  • 2
  • 5
  • 4

Question 3 : What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

 struct Stru {

    int  i1, i2;

    char c1, c2;

};

   int main()

{

        Stru a = { 1, 2, ‘a’, ‘b’ };

        Stru b = { 5, 6, ‘x’, ‘y’ };

        cout << static_cast<char>(b.c1 + a.i1);

        cout << static_cast<int>(a.c2 – a.c1);

        cout << static_cast<int>(b.c2 – b.c1);

}

  • z22
  • b12
  • y11
  • a11

Question 4 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    for(float val = -10.0; val < 100.0; val = -val * 2) {

        if(val < 0 && -val >= 20)

            break;

        cout << “*”;

    }

}

  • **
  • ****
  • *****
  • ***

Question 5 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    bool yes = !false;

    bool no = !yes;

    if(!no)

        cout << “true”;

    else

        cout << “false” ;

}

  • true
  • no
  • false
  • yes

Question 6 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

        float val = 100.0;

        do {

            val = val / 5;

            cout << “*”;

        } while(val > 1.0);

}                            

  • **
  • *****
  • ****
  • ***

Question 7 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    int a = 1, b = 2;

    int c = a << b;

    int d = 1 << c;

    int e = d >> d;

    cout << e;

}

  • 1
  • 0
  • 4
  • 2

Question 8 : What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

int main()

{

        vector<bool> t(2);

        for(int i = 0; i < 2; i++)

            t[1 – i] = !(i % 2);

        cout << t[0] && t[1];

        return 0;

}

  • true
  • 0
  • 1
  • false

Question 9 : What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

int main()

{

        vector<vector<int>> g = {{2,  4},

                                 {3,  6},

                                 {5, 10}};

        for(int i = 1; i >= 0; i–)

            for(int j = 0; j < 2; j++)

                g[i][j] += g[j][i];

        cout << g[1][1];

}

  • 6
  • 15
  • 9
  • 12

Question 10 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    int i = 0, j = i++, k = –i;

    if(i > 0)

        j++;

    else

        k++;

    if(k == 0)

        i++;

    else if(k > 0)

        k–;

    else

        k++;

    cout << i * j * k;

}

  • 1
  • 2
  • 0
  • -1

Question 11:What is the output of the following snippet?

double big = 1e15;

double small = 1e-15;

cout << fixed << big+ small;

  • 1000000000000000.0000000000000001
  • 0.0
  • 1.01e15
  • 1000000000000000.000000

Question 12:What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    for(float val = -10.0; val < 20.0; val = -val * 2)

        cout << “*”;

}

  • **
  • ***
  • ****
  • *

Question 13 :What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

int main()

{

    vector<int> a = {2, 0, 1};

    vector<int> b = {1, 2, 3};

    for(int i = 0; i < 3; i++)

        b[a[i]] = b[2 – i];

    cout << b[0] << b[2];

}

  • 21
  • 23
  • 12
  • 32

Question 14 :What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

        int a = 1, b = 2;

        int c = a | b;

        int d = c & a;

        int e = d ^ 0;

        cout << e << d << c;

}

  • 131
  • 113
  • 100
  • 031

Question 15 : What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

struct S {

    int t;

};

struct SS {

    S t;

};

int main() {

        vector<SS> t = { {1}, {2} };

        cout << t[0].t.t << t[1].t.t;

}

  • 21
  • 12
  • 22
  • 11

Question 16 : What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

int main()

{

        vector<char> arr = { ‘a’, ‘b’, ‘c’ };

        for(int i = 1; i < arr.size(); i++) {

            cout << “*”;

            if((arr[i] – arr[i – 1]) % 2)

                continue;

            cout << “*”;

        }

}

  • ***
  • **
  • ****
  • *

Question 17 :What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

struct Str {

    int  in;

    char ch;

};

int main()

{

        vector<Str> t = { {1, ‘a’}, {2, ‘b’}};

        for(int i = 0; i < 2; i++)

                t[i].in += (t[1 – i].ch – t[i].ch);

        cout << t[0].in << t[1].in;

}

}

  • 22
  • 12
  • 21
  • 11

Question 18 : What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    int i = 5, j = 0;

    while(i > 0) {

        i–;

        j++;

    }

    cout << j;

}

  • 2
  • 3
  • 4
  • 5

Question 19 : What is the output of the following snippet?

#include <iostream>

#include <vector>

using namespace std;

int main()

{

        vector<int> t = { 8, 4, 3, 2, 1 };

        int i;

        for(i = t[4]; i < t[3]; i++)

            t[i – 1] = -t[3];

        cout << i;

}

  • 2
  • 3
  • 4

Question 20 : What is the output of the following snippet?

#include <iostream>

using namespace std;

int main()

{

    int i = 3, j = 0;

    do {

        i–;

        j++;

    } while(i >= 0);

    cout << j;

  • 5
  • 2
  • 3
  • 4

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