
MIDTERM EXAMINATION ELXTECH 213 EMBEDDED SYSTEMS
Authored by Eric Pardiñan
Professional Development
University
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which microcontroller family does the ESP32 belong to?
AVR
ARM Cortex M0
Xtensa
PIC
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What feature makes ESP32 ideal for IoT?
Built-in WiFi and Bluetooth
Built-in relay control
Uses 5V logic only
Requires a sound module
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The function tone(pin, frequency, duration) is used to control what component?
Servo motor
Piezo buzzer
Relay coil
HC-06 module
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the mobile app controlled servo motor activity, what data does the HC-06 Bluetooth module send to the Arduino to control the servo?
A voltage reference that rotates the servo automatically
An angle value that determines the servo position
Binary audio signals from the microphone
WiFi credentials for pairing
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In generating melodies using Arduino, changing frequency affects:
Loudness
Pitch
Voltage
Delay
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A relay isolates which two circuits?
Two grounds
Low-voltage and high-voltage
Two high-voltage lines
Internet networks
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ESP32 typically operates at:
12V
9V
5V logic
3.3V logic
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