Inspection of infrastructure in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Drone Path Calculation Output

What is the output of the following drone path calculation code snippet?

Drone Programming

path = [(0,0), (1,2), (3,5), (6,8)]
total_distance = 0
for i in range(len(path)-1):
    x1, y1 = path[i]
    x2, y2 = path[i+1]
    dist = ((x2 - x1)**2 + (y2 - y1)**2)**0.5
    total_distance += dist
print(round(total_distance, 2))

A 10.08

B 10.0

C 12.0

D 9.5

💡 Hint

Calculate the distance between each consecutive point and sum them.

The code calculates the Euclidean distance between each pair of consecutive points and sums them. The distances are approximately 2.24, 3.61, and 3.61, totaling about 9.46, rounded to 9.46.

🧠 Conceptual

intermediate

Understanding Drone Sensor Data Processing

Which option best describes how a drone processes sensor data to detect structural cracks during inspection?

A The drone uses image recognition algorithms to analyze photos taken and identify crack patterns.

B The drone uses sound waves to detect cracks without any image data.

C The drone ignores sensor data and relies on GPS coordinates only.

D The drone manually inspects cracks by sending a technician to the site.

💡 Hint

Think about how drones use cameras and software to analyze structures.

Drones typically use cameras and image recognition software to detect cracks by analyzing photos or video frames. Manual inspection or ignoring sensor data is not automated drone behavior.

🔧 Debug

advanced

Fix the Drone Battery Check Logic

What error does the following drone battery check code raise when executed?

Drone Programming

battery_level = 15
if battery_level < 20
    print("Battery too low for inspection flight.")
else:
    print("Battery level sufficient.")

A TypeError because battery_level is not an integer

B No error, prints 'Battery too low for inspection flight.'

C NameError because battery_level is undefined

D SyntaxError due to missing colon after if statement

💡 Hint

Check the syntax of the if statement.

The if statement is missing a colon at the end of the condition line, causing a SyntaxError.

📝 Syntax

advanced

Identify the Correct Drone Command Syntax

Which option shows the correct syntax to command a drone to hover at 10 meters altitude for 5 seconds?

A drone.hover(altitude:10, duration:5)

B drone.hover(10, 5 seconds)

C drone.hover(altitude=10, duration=5)

D drone.hover(altitude=10 duration=5)

💡 Hint

Look for proper function call syntax with named parameters.

Option C uses correct Python function call syntax with named arguments and proper commas. Other options have syntax errors or invalid parameter formats.

🚀 Application

expert

Calculate Number of Inspection Points

A drone inspects a bridge by taking photos every 3 meters along a 120-meter span. It also takes 2 photos at each end for detailed views. How many photos does the drone take in total?

A 40

B 42

C 44

D 46

💡 Hint

Divide the span by the photo interval, then add the extra photos at the ends.

The drone takes photos every 3 meters: 120 / 3 = 40 intervals, so 41 points including start and end. Adding 2 extra photos at each end adds 4 more photos. Total = 41 + 4 = 45. But since the 2 photos at each end replace the normal photo at those points, total photos = 41 + 2 + 2 - 3 (to avoid double counting) = 42.

Practice

1. What is the main purpose of using a drone's inspect() function in infrastructure inspection?

easy

A. To control the drone's speed during flight

B. To repair damaged parts of the infrastructure

C. To send the drone to a specific location for inspection

D. To charge the drone's battery automatically

Solution

1. Step 1: Understand the function purpose

   The inspect() function is designed to send the drone to a location for inspection.

2. Step 2: Compare options with function role

   Only To send the drone to a specific location for inspection matches the purpose of sending the drone to inspect infrastructure.

3. Final Answer:

   To send the drone to a specific location for inspection -> Option C

4. Quick Check:

   inspect() sends drone to location = A [OK]

Hint: Remember: inspect() means 'go check there' [OK]

Common Mistakes:

• Confusing inspect() with repair functions
• Thinking inspect() controls speed
• Assuming inspect() charges battery

2. Which of the following is the correct syntax to capture an image during a drone inspection?

easy

A. drone.captureImage()

B. drone.capture-Image()

C. drone.captureimage()

D. drone.capture_image()

Solution

1. Step 1: Identify correct method naming style

   In drone programming, method names use lowercase with underscores for readability.

2. Step 2: Match options to correct style

   drone.capture_image() uses capture_image(), which is the correct syntax.

3. Final Answer:

   drone.capture_image() -> Option D

4. Quick Check:

   Method names use underscores = D [OK]

Hint: Use underscores for multi-word method names [OK]

Common Mistakes:

• Using camelCase instead of snake_case
• Omitting underscores between words
• Using invalid characters like hyphens

3. What will be the output of this code snippet?

drone.inspect('bridge')
image = drone.capture_image()
print(image)

medium

A. SyntaxError

B. 'bridge_image.jpg'

C. None

D. 'image captured'

Solution

1. Step 1: Understand the inspect and capture_image functions

   The inspect('bridge') sends the drone to the bridge, and capture_image() takes a photo and returns the filename.

2. Step 2: Analyze the print output

   Printing image shows the filename string, which is 'bridge_image.jpg'.

3. Final Answer:

   'bridge_image.jpg' -> Option B

4. Quick Check:

   capture_image() returns filename = C [OK]

Hint: capture_image() returns filename string [OK]

Common Mistakes:

• Expecting a boolean or None instead of filename
• Confusing print output with status messages
• Assuming syntax error without checking code

4. Identify the error in this drone inspection code:

drone.inspect('tower')
image = drone.captureImage()
print(image)

medium

A. Method name should be capture_image(), not captureImage()

B. Missing parentheses after inspect

C. print() cannot print variables

D. inspect() requires two arguments

Solution

1. Step 1: Check method names for correct syntax

   The method captureImage() is incorrect; it should be capture_image() using underscores.

2. Step 2: Verify other code parts

   inspect('tower') is correct with parentheses and one argument; print() can print variables.

3. Final Answer:

   Method name should be capture_image(), not captureImage() -> Option A

4. Quick Check:

   Method names use underscores = A [OK]

Hint: Check method names carefully for underscores [OK]

Common Mistakes:

• Using camelCase instead of snake_case
• Thinking print() can't print variables
• Assuming inspect needs two arguments

5. You want the drone to inspect multiple infrastructure points and save images with names matching each point. Which code correctly does this?

points = ['bridge', 'tower', 'dam']
images = {}
for point in points:
    drone.inspect(point)
    images[point] = drone.capture_image()
print(images)

hard

A. {'bridge': 'bridge_image.jpg', 'tower': 'tower_image.jpg', 'dam': 'dam_image.jpg'}

B. ['bridge_image.jpg', 'tower_image.jpg', 'dam_image.jpg']

C. {'bridge_image.jpg', 'tower_image.jpg', 'dam_image.jpg'}

D. SyntaxError due to missing colon in for loop

Solution

1. Step 1: Understand the loop and dictionary usage

   The code loops over points, inspects each, and stores the image filename in a dictionary with the point as key.

2. Step 2: Predict the dictionary content after loop

   Each key is the point name, and value is the image filename matching that point, e.g. 'bridge_image.jpg'.

3. Final Answer:

   {'bridge': 'bridge_image.jpg', 'tower': 'tower_image.jpg', 'dam': 'dam_image.jpg'} -> Option A

4. Quick Check:

   Dictionary keys = points, values = filenames = B [OK]

Hint: Use dictionary to map points to images [OK]

Common Mistakes:

• Using list instead of dictionary for mapping
• Forgetting colon after for loop
• Confusing set notation with dictionary