M2 Quiz

[2points] Which has a lower music frequency for coding music?

• #define NOTE_AS7 3729

• #define NOTE_AS6 1865

[2 points] In programming, what do you call a list or collection of elements of the same data type?

• loop

• variable

• array

• setup

[2 points] In coding, how will you access NOTE_D5 in this array?

int melody[ ]={

NOTE_D5, NOTE_G3, NOTE_D5, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4

};

• tone(8, melody[3], noteDurations[3]);

• tone(8, melody[1], noteDurations[1]);

• tone(8, melody[0], noteDurations[0]);

• tone(8, melody[2], noteDurations[2]);

[2 points] What does this code mean?

tone(8);

• Buzzer to connect should be 8 pieces

• Buzzer is going to play sound for 8 times

• Buzzer is connected to pin number 8

• Buzzer will rotate in 8 degrees angle

[2 points] How will you access the number/digit 8 in this array?

int noteDurations[ ]={

4,8,4,4,4,4,4,4

};

• tone(8, melody[0], noteDurations[0]);

• tone(8, melody[1], noteDurations[1]);

• tone(8, melody[2], noteDurations[2]);

• tone(8, melody[3], noteDurations[3]);

[4 points] What is the bug in this code?

in melody[ ]={

NOTE_A6, NOTE_B6, NOTE_C7

};

• in should be written as int

• in should be written as intl

• missing semi-colon symbol

• missing comma symbol

[2 points] What do you call a useful component that allows the programmer to give a name to a constant value before the program is compiled?

• var

• int

• #define

• #arduino

[2 points] This code has a bug. How will you fix and rewrite the correct code?

tone(8 melody[4] noteDurations[4]);

• tone(8, melody[4] noteDurations[4]);

• tone(8 melody[0] noteDurations[0]);

• tone(8, melody[4], noteDurations[4]);

• tone(8 melody[4] noteDurations[0]);

[2 points] In this code, what does the digit 0 mean?

int melody[]={

NOTE_D5, 0, NOTE_B3, NOTE_C4

};

• It means the buzzer will be disconnected

• It means the buzzer sound will play 1 time

• It means the buzzer sound will pause the note

• It means the buzzer will rotate 0 degrees angle