CPA – Programming Essentials in C++ Module 1 Exam Answers

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CPA – Programming Essentials in C++ Module 1 Exam Answers

Question 1: What is the output of the following snippet if a digit 8 followed by Enter is entered through the keyboard?

#include <iostream>

using namespace std;

int main()

{

    int i;

    cin >> i;

    cout << i << hex << i + i << oct << i;

}

• 8×10010
• 81010
• 8168
• 810010

Question 2: Which of the following strings is a proper floating-point number (in the C++ language sense)?

• 3,14
• E14
• 3.14
• 3_14

Question 3: What is the output of the following snippet if a digit 5 followed by Enter is entered through the keyboard?

#include <iostream>

using namespace std;

int main()

{

    int i = 3, j = ++i, k = ++i;

    cin >> i;

    cout << k + i << j – i << i * i;

}

• 10125
• 10-125
• 10-545
• 10545

Question 4: What is the value of the following literal?

OE1

• 0
• 0.01
• 0.1
• The literal is invalid.

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

#include <iostream>

using namespace std;

int main()

{

    int i = 3, j = ++i, k = ++i;

    cout << k << j << i;

• 545
• 543
• 454
• 345

Question 6: What is the value of the following literal?

0X1A

• 6
• The literal is invalid.
• 26
• 16

Question 7: Which of the following strings is a correct integer number (in the C++ language sense)?

• 3E14
• 3.14
• 3’14
• 3,14

Question 8: What is the final value of the k variable?

int i = 3, j = 2, k = -1;

if(i > 0) {

    if(j <= 0) {

        if(k < 0)

            k++;

        if(k <= 0)

            k–;

    }

    if(j > 0)

        i++;

}

if(i <= 0)

    j++;

k = i + j + k;

• 3
• 6
• 5
• 4

Question 9: What is the value of the following literal?

018

• 2
• 16
• 10
• The literal is invalid.

Question 10: What is the value of the following literal?

-1e-1

• The literal is invalid.
• -0.1
• -1.0
• -10.0

Question 11: What is the value of the following literal?

X10

• 10
• 2
• The literal is invalid.
• 16

Question 12: Which of the following strings does not represent a valid variable name?

• auto
• AUTO
• Auto
• aUTO

Question 13: What is the value of the x variable?

float x = 1. / 2. + 2. / 4.;

• 0.75
• 0.5
• 0.25
• 1.0

Question 14: What is the value of the k variable?

int k = 1 % 2 + 4 % 2;

• 1
• 0
• 2
• 3

Question 15: What is the value of the k variable?

int i = 1;

int j = ++i;

int k = j++;

• 0
• 3
• 2
• 1

Question 16: Which of the following strings represents a legal variable name?

• #1_literal_is_invalid
• 1st_literal_is_invalid
• first_literal_is_invalid
• first literal is invalid

Question 17: What is the output of the following snippet if a string 2.5 followed by Enter is entered through the keyboard?

#include <iostream>

using namespace std;

int main()

{

    float x;

    cin >> x;

    cout << scientific << “x”;

}

• 2.5E0
• x
• 2.5
• 0.25E1

Question 18: What is the value of the following literal?

010

• 2
• The literal is invalid.
• 10
• 8

Question 19: What is the value of the i variable?

float x = 1.0 / 4.0;

int=x;

• 0.33
• 0
• 0.25
• 1

Question 20: What is the final value of the k variable?

int i = 3, j, k;

if(i > 0) j = 2 + i * i;

if(i <= 0) j = 2 * i – 1;

if(j >= 0) k = j % i + 2;

if(j < 0) k = i % j + 2;

if(k < 0) k = k % i % j;

if(k >=0) k = j % i % k;

• 3
• 1
• 0
• 2