Receiving telemetry data in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to receive telemetry data from the drone.

Drone Programming

telemetry = drone.[1]()

Drag options to blanks, or click blank then click option'

Aconnect

Bsend_command

Cget_telemetry

Ddisconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'send_command' instead of 'get_telemetry'.

Trying to use 'connect' to receive data.

The get_telemetry() method is used to receive telemetry data from the drone.

2fill in blank

medium

Complete the code to extract the drone's altitude from the telemetry data.

Drone Programming

altitude = telemetry.[1]['altitude']

Drag options to blanks, or click blank then click option'

Asend

Bstatus

Creceive

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'send' or 'receive' instead of 'data'.

Trying to access 'status' which is not the telemetry dictionary.

The telemetry data is stored in the data attribute, which is a dictionary containing keys like 'altitude'.

3fill in blank

hard

Fix the error in the code to correctly print the drone's battery level from telemetry.

Drone Programming

print('Battery level:', telemetry.[1]['battery'])

Drag options to blanks, or click blank then click option'

Adata

Bbattery

Cstatus

Dbattery_level

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to access 'battery' directly on telemetry.

Using 'battery_level' which is not an attribute.

The telemetry dictionary is accessed via the data attribute, which contains the 'battery' key.

4fill in blank

hard

Fill both blanks to create a dictionary of altitude and speed from telemetry data.

Drone Programming

info = {'altitude': telemetry.[1]['altitude'], 'speed': telemetry.[2]['speed']}

Drag options to blanks, or click blank then click option'

Adata

Bstatus

Cinfo

Dmetrics

Attempts:

3 left

💡 Hint

Common Mistakes

Using different attributes for altitude and speed.

Using 'status' or 'info' which do not hold telemetry data.

Both 'altitude' and 'speed' are keys inside the telemetry's data dictionary.

5fill in blank

hard

Fill all three blanks to filter telemetry data for altitude above 100 and speed below 50.

Drone Programming

filtered = {k: v for k, v in telemetry.[1].items() if telemetry.[1]['altitude'] [2] 100 and telemetry.[1]['speed'] [3] 50}

Drag options to blanks, or click blank then click option'

Adata

B>

C<

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'status' instead of 'data'.

Mixing up comparison operators.

The telemetry data is in data. We filter where altitude is greater than 100 and speed is less than 50.

Practice

1.

What does telemetry data from a drone usually include?

easy

A. Information about the drone's position and battery status

B. The drone's color and shape

C. The pilot's personal details

D. The weather forecast for the day

Solution

1. Step 1: Understand telemetry data purpose

   Telemetry data provides real-time information about the drone's current state.

2. Step 2: Identify typical telemetry contents

   Common telemetry includes position coordinates and battery level, not unrelated info like color or weather.

3. Final Answer:

   Information about the drone's position and battery status -> Option A

4. Quick Check:

   Telemetry = position + battery [OK]

Hint: Telemetry means drone status info like position and battery [OK]

Common Mistakes:

• Confusing telemetry with unrelated data like weather
• Thinking telemetry includes pilot personal info
• Assuming telemetry is about drone appearance

2.

Which of the following is the correct way to receive telemetry data from a drone object named drone?

?

easy

A. telemetry = drone.receiveTelemetry

B. telemetry = drone.get_telemetry()

C. telemetry = get_telemetry(drone)

D. telemetry = drone.telemetry()

Solution

1. Step 1: Identify method call syntax

   To call a method on an object, use dot notation with parentheses: object.method()

2. Step 2: Match method name exactly

   The correct method is get_telemetry(), so drone.get_telemetry() is correct.

3. Final Answer:

   telemetry = drone.get_telemetry() -> Option B

4. Quick Check:

   Method call syntax = drone.get_telemetry() [OK]

Hint: Use dot and parentheses to call get_telemetry() method [OK]

Common Mistakes:

• Missing parentheses when calling method
• Using wrong method name or syntax
• Trying to call method without object

3.

What will be the output of this code snippet?

drone = Drone()
telemetry = drone.get_telemetry()
print(telemetry['battery'])

Assume get_telemetry() returns {'position': (10, 20), 'battery': 85}.

medium

A. 10

B. (10, 20)

C. Error

D. 85

Solution

1. Step 1: Understand returned telemetry dictionary

   The telemetry dictionary has keys 'position' and 'battery' with values (10, 20) and 85 respectively.

2. Step 2: Access the 'battery' key value

   Printing telemetry['battery'] outputs 85, the battery percentage.

3. Final Answer:

   85 -> Option D

4. Quick Check:

   telemetry['battery'] = 85 [OK]

Hint: Access dictionary key 'battery' to get battery level [OK]

Common Mistakes:

• Confusing 'position' with 'battery' key
• Trying to print telemetry without key
• Assuming output is a tuple instead of number

4.

Find the error in this code that tries to print the drone's position from telemetry data:

telemetry = drone.get_telemetry()
print(telemetry.position)

medium

A. Accessing dictionary key with dot notation causes error

B. telemetry is not defined

C. Missing parentheses in get_telemetry call

D. print statement syntax is wrong

Solution

1. Step 1: Check how telemetry data is accessed

   Telemetry is a dictionary, so keys must be accessed with square brackets, not dot notation.

2. Step 2: Identify the error cause

   Using telemetry.position causes an AttributeError because dictionaries don't support dot notation.

3. Final Answer:

   Accessing dictionary key with dot notation causes error -> Option A

4. Quick Check:

   Dictionary keys need brackets, not dots [OK]

Hint: Use brackets [] to access dictionary keys, not dot . [OK]

Common Mistakes:

• Using dot notation on dictionary keys
• Forgetting parentheses on method call
• Assuming telemetry is an object with attributes

5.

You want to check if the drone's battery is below 20% and print a warning. Which code correctly does this using telemetry data?

telemetry = drone.get_telemetry()
?

hard

A. if telemetry['battery'] > 20:
print('Warning: Low battery!')

B. if telemetry.battery < 20:
print('Warning: Low battery!')

C. if telemetry['battery'] < 20:
print('Warning: Low battery!')

D. if drone.battery < 20:
print('Warning: Low battery!')

Solution

1. Step 1: Access battery level correctly from telemetry

   Telemetry is a dictionary, so use square brackets: telemetry['battery'].

2. Step 2: Write condition to check if battery is below 20

   The condition should be < 20 to detect low battery and print warning.

3. Final Answer:

   if telemetry['battery'] < 20: print('Warning: Low battery!') -> Option C

4. Quick Check:

   Check battery < 20 with brackets [OK]

Hint: Use telemetry['battery'] < 20 to check low battery [OK]

Common Mistakes:

• Using dot notation to access battery
• Checking battery > 20 instead of < 20
• Accessing battery directly from drone object