Range finder for terrain following in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read the distance from the range finder sensor.

Drone Programming

distance = sensor.[1]()

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Ameasure

Bget_distance

Cread_distance

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist on the sensor object.

Confusing the method with one that sets values instead of reading.

The method read_distance() correctly reads the distance from the range finder sensor.

2fill in blank

medium

Complete the code to check if the drone is too close to the ground.

Drone Programming

if distance [1] safe_height:

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A<

B>=

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>=' instead of '<' which reverses the logic.

Using '==' which only checks for exact equality.

The condition distance < safe_height checks if the drone is closer than the safe height to the ground.

3fill in blank

hard

Fix the error in the code to update the drone's altitude safely.

Drone Programming

drone.altitude [1] safe_height

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A==

B-=

C+=

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' which is a comparison, not assignment.

Using '+=' or '-=' which modifies the value instead of setting it.

To set the drone's altitude to the safe height, use the assignment operator '='.

4fill in blank

hard

Fill both blanks to create a dictionary of distances for each sensor if the distance is less than the threshold.

Drone Programming

distances = {sensor_id: [1] for sensor_id, [2] in sensors.items() if [1] < threshold}

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Adistance

Bdistance_value

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent variable names causing errors.

Using the same variable name for both keys and values.

The dictionary comprehension uses distance_value as the value and variable for sensor readings.

5fill in blank

hard

Fill all three blanks to filter sensors and create a dictionary with sensor names in uppercase and distances greater than minimum distance.

Drone Programming

filtered = { [1]: [2] for [3], [2] in sensor_data.items() if [2] > min_distance }

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Asensor.upper()

Bdistance

Csensor

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing variable names causing confusion.

Not converting sensor names to uppercase.

The dictionary keys are sensor names in uppercase (sensor.upper()), values are distances (distance), and the loop variable for sensor names is sensor.