Pre-flight checklist automation in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of battery check function

What is the output of this pre-flight battery check function when battery level is 75%?

Drone Programming

def check_battery(level):
    if level < 20:
        return "Battery too low"
    elif level < 50:
        return "Battery low"
    else:
        return "Battery sufficient"

print(check_battery(75))

A "Battery critical"

B "Battery low"

C "Battery too low"

D "Battery sufficient"

💡 Hint

Think about the battery level ranges and which message matches 75%.

The function returns "Battery sufficient" for levels 50 and above. Since 75 is above 50, it returns "Battery sufficient".

🧠 Conceptual

intermediate

Understanding sensor status check

If a drone's sensor status is represented by a dictionary {'GPS': True, 'Camera': False, 'Lidar': True}, which sensor is NOT ready for flight?

A Camera

B GPS

C Lidar

D All sensors are ready

💡 Hint

True means ready, False means not ready.

The 'Camera' sensor has a value False, meaning it is not ready for flight.

🔧 Debug

advanced

Identify the error in the checklist loop

What error does this code raise when running the pre-flight checklist loop? checklist = ['Battery', 'GPS', 'Camera'] for item in checklist print(f"Checking {item}...")

Drone Programming

checklist = ['Battery', 'GPS', 'Camera']
for item in checklist
    print(f"Checking {item}...")

A TypeError: 'list' object is not callable

B SyntaxError: expected ':' after for loop

C IndentationError: unexpected indent

D NameError: checklist is not defined

💡 Hint

Check the syntax of the for loop header.

The for loop is missing a colon ':' at the end of the line, causing a SyntaxError.

📝 Syntax

advanced

Correct dictionary comprehension for sensor readiness

Which option correctly creates a dictionary showing sensor readiness from a list of sensors with their status?

Drone Programming

sensors = [('GPS', True), ('Camera', False), ('Lidar', True)]

A {sensor: status for sensor, status in sensors if status == True}

B {sensor: status if status == True for sensor, status in sensors}

C {sensor: status for sensor, status in sensors if status}

D {sensor: status for sensor, status in sensors}

💡 Hint

Remember the syntax for filtering in dictionary comprehensions.

Option C correctly filters sensors with status True and creates the dictionary. Option C is invalid syntax, B is invalid, C includes all sensors regardless of status.

🚀 Application

expert

Final checklist status after automation run

Given this automation code, what is the final value of the variable 'ready' after running? checklist = {'Battery': True, 'GPS': True, 'Camera': False, 'Lidar': True} ready = all(checklist.values()) # What does 'ready' hold?

Drone Programming

checklist = {'Battery': True, 'GPS': True, 'Camera': False, 'Lidar': True}
ready = all(checklist.values())

A False

B None

C True

D Raises an error

💡 Hint

The all() function returns True only if all values are True.

Since 'Camera' is False, all(checklist.values()) returns False, so 'ready' is False.