Communication between drones in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Message Passing Output

What is the output of this drone communication code snippet?

Drone Programming

drone1 = {'id': 101, 'message': 'Hello'}
drone2 = {'id': 102, 'message': ''}
# drone2 receives message from drone1
drone2['message'] = drone1['message']
print(drone2['message'])

A null

B Hello

C '' (empty string)

D Error: KeyError

💡 Hint

Think about how drone2 gets the message from drone1.

The code assigns drone1's message to drone2's message, so drone2 prints 'Hello'.

🧠 Conceptual

intermediate

Communication Protocol Concept

Which communication protocol is best suited for drones to exchange short messages quickly and reliably over short distances?

A Wi-Fi

B Satellite

C Bluetooth

D Fiber Optic Cable

💡 Hint

Think about short-range wireless communication.

Bluetooth is designed for short-range, quick, and reliable wireless communication, ideal for drones nearby.

🔧 Debug

advanced

Fix the Drone Message Broadcast Bug

What error does this code raise when drones try to broadcast messages to each other?

Drone Programming

drones = [{'id': 1, 'msg': 'Hi'}, {'id': 2, 'msg': ''}]
for drone in drones:
    for other in drones:
        if drone != other:
            other['msg'] = drone['msg']
print(drones[1]['msg'])

A TypeError: unsupported operand type(s)

B IndexError: list index out of range

C No error, output is 'Hi'

D KeyError: 'message'

💡 Hint

Check the dictionary keys used in the code.

The key 'message' does not exist; the correct key is 'msg', so KeyError occurs.

📝 Syntax

advanced

Identify the Syntax Error in Drone Communication Loop

Which option contains the syntax error preventing the drone communication loop from running?

Drone Programming

for drone in drones
    print(drone['id'])

A for drone in drones\n print(drone['id'])

B for drone in drones:\nprint(drone['id'])

C for drone in drones:\n print(drone['id'])

D for drone in drones: print(drone['id'])

💡 Hint

Look for missing punctuation in the for loop.

Option A is missing the colon ':' after the for statement, causing a syntax error.

🚀 Application

expert

Calculate Total Messages Exchanged

Given 4 drones where each drone sends a message to every other drone exactly once, how many total messages are exchanged?

A 12

B 16

C 8

D 6

💡 Hint

Each drone sends messages to all other drones except itself.

Each of the 4 drones sends messages to 3 others, so 4 * 3 = 12 messages total.