Receiving telemetry data in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of telemetry data parsing

What is the output of this code that parses telemetry data from a drone?

Drone Programming

telemetry = {'altitude': 1200, 'speed': 45, 'battery': 78}
status = f"Altitude: {telemetry['altitude']}m, Speed: {telemetry['speed']}km/h, Battery: {telemetry['battery']}%"
print(status)

A Altitude: 1200, Speed: 45, Battery: 78

B Altitude: 1200m Speed: 45km/h Battery: 78%

C Altitude: 1200m, Speed: 45km/h, Battery: 78%

D Altitude: 1200m, Speed: 45km/h, Battery: 100%

💡 Hint

Look carefully at the formatting in the f-string and the values accessed from the dictionary.

The code uses an f-string to format the telemetry dictionary values with units and percentage signs. Option C matches the exact output.

🧠 Conceptual

intermediate

Understanding telemetry data update frequency

If a drone sends telemetry data every 500 milliseconds, how many telemetry updates will be received in 5 seconds?

A 10

B 20

C 5

D 50

💡 Hint

Calculate how many 500ms intervals fit into 5 seconds.

5 seconds = 5000 milliseconds. 5000 / 500 = 10 intervals. But each interval sends one update, so 10 updates.

🔧 Debug

advanced

Identify the error in telemetry data extraction

What error does this code raise when trying to access telemetry data?

Drone Programming

telemetry = {'altitude': 300, 'speed': 60}
print(telemetry['battery'])

A KeyError

B TypeError

C ValueError

D IndexError

💡 Hint

Check if the key 'battery' exists in the dictionary.

The dictionary does not have the key 'battery', so accessing it raises a KeyError.

📝 Syntax

advanced

Syntax error in telemetry data processing

Which option contains the correct syntax to update the battery level in the telemetry dictionary?

Drone Programming

telemetry = {'altitude': 500, 'speed': 30, 'battery': 90}

A telemetry->battery = 85

B telemetry.battery = 85

C telemetry['battery'] := 85

D telemetry['battery'] = 85

💡 Hint

Remember how to update dictionary values in Python.

Option D uses the correct syntax to update a dictionary key's value. Other options are invalid syntax in Python.

🚀 Application

expert

Calculate average speed from telemetry data list

Given a list of telemetry speed readings, which option correctly calculates the average speed?

Drone Programming

speeds = [40, 45, 50, 55, 60]

A average = sum(speeds) // len(speeds)

B average = sum(speeds) / len(speeds)

C average = max(speeds) - min(speeds)

D average = speeds[len(speeds)//2]

💡 Hint

Average speed is total speed divided by number of readings.

Option B correctly calculates the average by dividing the sum of speeds by the count. Option B does integer division, which may lose precision. Options C and D do not calculate average.