Coding Exam

Question 1

Declare a comment with your student number.

Answer 1

//01029384

Question 2

Declare a variable for storing the number of students in a lecture.

Answer 2

int numOfStudents;

Question 3

Declare a variable for storing the name of car.

Answer 3

std::string carName;

Question 4

Declare a variable for storing someone’s height.

Answer 4

float height;

Question 5

Declare a variable for storing the state of a door lock.

Answer 5

bool doorState;

Question 6

Write statement to print ‘Hello Sam’.

Answer 6

//Hello sam
    std::cout << "Hello sam";

Question 7

Write statement to print the value stored in an integer variable called age.

Answer 7

//The value stored in a integer variable called age
    std::cout << age;

Question 8

Write statement to print the value of a variable called time followed by a new line but proceeded by a tab space.

Answer 8

//The value of a variable called time followed by a new line but proceeded by a tab space
    std::cout << "\t" << time << "\n";

Question 9

Write statement to declare and read a integer number from the QWERTY keyboard

Answer 9

int num;

std::cin&raquo_space; num;

Question 10

Write statement to declare and read a float from the QWERTY keyboard

Answer 10

float num;

std::cin&raquo_space; num;

Question 11

Write statement to declare and read a string from the QWERTY keyboard

Answer 11

std: :string name;

std: :cin&raquo_space; name;

Question 12

Declare a constant value called twoPi with the value 6.28318

Answer 12

const float twoPi = 6.28318;

Question 13

Declare a constant value called name with your name

Answer 13

const std::string name = “dave”;

Question 14

Write the following in C++ code: area = 2piR(squared)

Answer 14

const float twoPi = 6.28318;
float r = 1;
float area = twoPi * pow(r, 2);

Question 15

Write an if statement that prints “lift-off” if a variable named time reaches 0.

Answer 15

if (time == 0) {
std::cout &laquo_space;“Lift-off”;
}

Question 16

Write an if…else statement that will print “light” if a variable named weight has a value less than 50 and print “heavy” otherwise

Answer 16

if (weight < 50) {
	std::cout << "light \n";
}
else {
	std::cout << "heavy \n";
}

Question 17

Write a switch case for all the days of the week, whereby the input is a number representing the day and each case should print the day in text form.

Answer 17

int day;
    switch (day) {
        case 0: // same as saying if (day == 0) 
            std::cout << "Monday \n";
            break;
        case 1: // same as saying else if (day == 1) 
            std::cout << "Tuesday \n";
            break;
        case 2:
            std::cout << "Wednesday \n";
            break;
        case 3:
            std::cout << "Thursday \n";
            break;
        case 4:
            std::cout << "Friday \n";
            break;
        default:
            // error handling for values that don't match
            break;
    }

Question 18

Write a function declaration for a function called bang, that takes no arguments and does not return anything.

Answer 18

void bang ();

Question 19

Write a function declaration for a function called square, that takes a single float argument and returns a float.

Answer 19

float square (float x);

Question 20

Write a function declaration for a function called printVector, that takes a single int vector as an argument and does not return anything.

Answer 20

void printVector (std::vector vector);

Question 21

Write a function definition for a function called bang, that takes no argument and does not return anything.

Answer 21

void IAP::bang ()
{

}

Question 22

Write a function definition for a function called square, that takes a single float argument and returns a float.

Answer 22

float IAP::square (float x)
{

}

Question 23

Write a function definition for function called printVector, that takes a single int vector as an argument and does not return anything

Answer 23

void IAP::printVector (std::vector vector)
{

}

Question 24

Declare an array of an appropriate type that could store

30 MIDI note numbers.

Answer 24

std::array midiNotes;

Question 25

Declare a vector of an appropriate type that could store amplitude values.

Answer 25

std::vector amps;

Question 26

Write a statement that stores the number 15 in the 2nd index of an array called numbers.

Answer 26

std::array numbers;

numbers[1] = 15;

Question 27

Write a statement that appends the value 60

to a vector called noteList.

Answer 27

std::vector noteList;

noteList.push_back(60);

Question 28

Write a for loop that starts at 0 and goes up to and including 10.

Answer 28

for (int i = 0; i <= 10; i++)

Question 29

Write a for loop that starts at 5 and goes down to and including -5

Answer 29

for (int i = 5; i >= -5; i–)

Question 30

Copy the value of a string called nameA to another string called nameB and then append the value of a string called nameC to the string called nameB.

Answer 30

std::string stringA;
std::string stringB;
std::string stringC;
stringB = stringA;

stringB += StringC;

Question 31

Class (1): Declare a class called MIDINote that has 3 integer member variables called
 - Status, data1, data2

Answer 31

class MIDINote {
public:
    int status, data1, data2;
}

Question 32

Class (2): Declare an instance of MIDINote

Answer 32

MidiNote mNote;

Question 33

Class (3): Set each of MIDINote’s member variables to

144, 60, 127

Answer 33

mNote.Status = 144;
mNote.data1 = 60;
mNote.data2 = 127;

Question 34

Class(4): Add a class method called print that prints all
of the class’ member variables

Answer 34

void print ()
    {
        std::cout << "Status: " << status << "Data 1: " << data1 << "Data 2: " << data2 << "\n";
    }

Question 35

Write the number 57 in hex.

Answer 35

0x39

Question 36

Write the number 57 in binary.

Answer 36

0011 1001

Question 37

How many bits are needed to store the number 502

Answer 37

9 bits

Question 38

How many bits are needed to store the number 255

Answer 38

8 bits

Question 39

How many bits are needed to store the number 16

Answer 39

5 bits