Youth Robotics Technology Level Exam Theory Comprehensive Paper (Level 4)
Score: 100 Questions: 30
1. Multiple Choice Questions (20 questions, 80 points total)
1. The following Arduino C program runs, under which condition will the serial monitor output “B”? ( )
A. score > 75 && score < 90
B. score > 75 || score < 90
C. score >= 75 && score < 90
D. score >= 75 || score < 90
Correct Answer: C
2. For Arduino UNO/Nano control board, what is the range of the variable val in the function analogWrite(3,val)? ( )
A. 0/1
B. 0 ~ 5
C. 0 ~ 255
D. 0 ~ 1023
Correct Answer: C
3. The NPN transistor is marked in the figure below, what are the corresponding pins A/B/C? ( )
A. Base / Collector / Emitter
B. Base / Emitter / Collector
C. Collector / Base / Emitter
D. Collector / Emitter / Base
Correct Answer: C
4. For Arduino UNO/Nano control board, when reading the return value using the function analogRead(A1), if the input voltage at pin A1 is 5V, what will the return value be? ( )
A. 1
B. 511
C. 1023
D. Uncertain
Correct Answer: C
5. In Arduino C language, which member function of the Serial library is used to send content to the serial monitor and implement a newline? ( )
A. Serial.print()
B. Serial.println()
C. serial.print()
D. serial.println()
Correct Answer: B
6. Reading the current ambient light data, the circuit is shown in the figure below, when the light intensity decreases, what will be the return value of analogRead(A0)? ( )
A. Increase
B. Decrease
C. No Change
D. Uncertain
Correct Answer: B
7. If the value of the variable val is 0, what will be the return value of the function constrain(val,255,1023);? ( )
A. 0
B. 255
C. 1023
D. Uncertain
Correct Answer: B
8. Regarding the push-button switch used in the textbook, which of the following descriptions is incorrect? ( )
A. When the button switch is pressed, it is in a closed state
B. Among the four pins on the back of the button switch, the two pins located on the same side as the groove remain conductive
C. When the button switch is pressed, all four pins are conductive
D. In the circuit, if only the button switch is used to read the return value, the corresponding pins can be set to input mode
Correct Answer: D
9. The following Arduino C program runs, what is the value of the variable sum? ( )
A. 2
B. 8
C. 16
D. 18
Correct Answer: A
10. In Arduino C language, what is the result of the relational expression 0xF>15? ( )
A. 0
B. 1
C. 0xF
D. 15
Correct Answer: A
11. In the following Arduino C program, when the value of the variable num is 3, what will be the output result of the serial monitor? ( )
A. No Output
B. 3
C. 4
D. 34
Correct Answer: C
12. For Arduino UNO/Nano control board, to read the return value from the potentiometer module, which function should normally be used? ( )
A. digitalWrite()
B. digitalRead()
C. analogWrite()
D. analogRead()
Correct Answer: D
13. In Arduino C language, which of the following options has the smallest value? ( )
A. 0b1000
B. 0x100
C. 0100
D. 100
Correct Answer: A
14. For Arduino UNO/Nano control board, the circuit setup and part of the program are as follows, when the button switch is pressed and the LED goes off, what are the values of A and B in the program block? ( )
A. HIGH / HIGH
B. HIGH / LOW
C. LOW / HIGH
D. LOW / LOW
Correct Answer: C
15. In Arduino C language, the logical operator used to indicate that if one of two conditions holds true, the entire condition holds true is? ( )
A. &
B. |
C. &&
D. ||
Correct Answer: D
16. For Arduino UNO/Nano control board, in the circuit shown in the figure below, when the button switch is disconnected, what will be the return value of digitalRead(6)? ( )
A. 0
B. 1
C. 5
D. Uncertain Value
Correct Answer: B
17. Regarding the Arduino C program, which code in the function will run in a loop? ( )
A. setup() function
B. loop() function
C. Serial.print() function
D. Serial.begin() function
Correct Answer: B
18. What is the size of the EEPROM in the Arduino UNO/Nano control board MCU? ( )
A. 1KB
B. 2KB
C. 8KB
D. 16KB
Correct Answer: A
19. In Arduino C language, what does the descriptor int represent? ( )
A. Integer
B. Boolean
C. Single-precision floating-point
D. Byte
Correct Answer: A
20. The following Arduino C program runs, what will be the output result of the serial monitor? ( )
A. #
B. #####
C. ######
D. ##########
Correct Answer: B
2. Multiple Choice Questions (5 questions, 10 points total)
21. Regarding Ohm’s Law, which of the following statements are correct? ( )
A. The greater the current flowing through the conductor, the greater the voltage across the conductor
B. The greater the voltage across the conductor, the greater the current flowing through it
C. When the voltage across the adjustable resistor remains unchanged, increasing its resistance will decrease the current flowing through it
D. The resistance of the conductor is an inherent characteristic and does not change with the voltage and current
Correct Answer: A|B|C|D
22. For Arduino UNO/Nano control board, what functions does pin A0 have? ( )
A. Digital signal input
B. Digital signal output
C. Analog signal input
D. Analog signal output
Correct Answer: A|B|C
23. Which of the following are examples of closed-loop control? ( )
A. UAV attitude control
B. Bicycle riding posture control
C. Adaptive cruise control in cars
D. Servo motor angle control
Correct Answer: A|B|C|D
24. For Arduino UNO/Nano control board, what functions does pin 0 have? ( )
A. Digital signal reading
B. Digital signal output
C. Serial data reception
D. Serial data transmission
Correct Answer: A|B|C
25. In Arduino C language, which of the following are member functions of the Serial library? ( )
A. begin()
B. print()
C. println()
D. pinMode()
Correct Answer: A|B|C
3. True/False Questions (5 questions, 10 points total)
26. It is usually necessary to connect the photoresistor and resistor in series to read the ambient light value. ( )
Correct False
Correct Answer: Correct
27. After the Arduino UNO/Nano control board is powered off, the data stored in the EEPROM will not be lost. ( )
Correct False
Correct Answer: Correct
28. When powered externally, the normal voltage range for the external power supply of the Arduino UNO/Nano control board is 7V~12V. ( )
Correct False
Correct Answer: Correct
29. The rotation of the motor controlled by the H-bridge circuit is determined by the voltage level. ( )
Correct False
Correct Answer: Correct
30. In Arduino C language, variable names can include full-width characters. ( )
Correct False
Correct Answer: False
Preparation Materials:
Summary of Knowledge Points for Robot Level Exam (Level 1) + Sample Questions
Summary of Knowledge Points for Robot Level Exam (Level 2) + Sample Questions
Summary of Knowledge Points for Robot Level Exam (Level 3) + Sample Questions
Summary of Knowledge Points for Robot Level Exam (Level 4) + Sample Questions
National Youth Software Programming Level Exam (Python Level 1) Knowledge Points
National Youth Software Programming Level Exam (Python Level 2) Knowledge Points Summary + Sample Questions
National Youth Software Programming Level Exam (Python Level 3) Knowledge Points Summary + Sample Questions
End
ICode International Youth Programming Competition Learning Platform Reference Answers
