Search and rescue assistance in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the drone's search mode.

Drone Programming

drone.[1]()

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

Atakeoff

Bland

Chover

Dshutdown

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'land' instead of 'takeoff' will stop the drone immediately.

The takeoff() command makes the drone start flying and begin the search.

2fill in blank

medium

Complete the code to check if the drone has found a person.

Drone Programming

if drone.detect_person() [1] True:

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

A==

B!=

C<

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' will check for no detection, which is wrong here.

The condition == True checks if the drone detected a person.

3fill in blank

hard

Fix the error in the code to send a rescue signal when a person is found.

Drone Programming

if drone.detect_person() == True:
    drone.[1]('rescue_signal')

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

Areceive

Bwait

Csend

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'receive' or 'wait' will not send the signal.

The send() method is used to send signals like 'rescue_signal'.

4fill in blank

hard

Fill both blanks to create a dictionary of detected persons with their distances.

Drone Programming

detected = {person: drone.[1](person) for person in drone.[2]()}

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

Adistance_to

Baltitude

Cdetected_persons

Dbattery_level

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'altitude' or 'battery_level' will not give correct distances or persons.

The drone calculates distance with distance_to() for each person in detected_persons().

5fill in blank

hard

Fill all three blanks to filter persons within 100 meters and prepare rescue messages.

Drone Programming

close_persons = {person: dist for person, dist in detected.items() if dist [1] 100}
messages = [f"Rescue needed for [2] at [3] meters" for person, dist in close_persons.items()]

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

A<

Bperson

Cdist

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' will select persons farther than 100 meters, which is wrong.

We select persons with distance less than 100 (<), then use person and dist to create messages.

Practice

1. What is the main purpose of a drone programmed for search and rescue assistance?

easy

A. To find missing persons and send their location quickly

B. To deliver packages to remote areas

C. To take aerial photos for tourism

D. To monitor weather patterns

Solution

1. Step 1: Understand the role of search and rescue drones

   These drones are designed to locate missing people or targets in emergency situations.

2. Step 2: Identify the key function

   The main function is to find and report the location quickly to help rescue teams.

3. Final Answer:

   To find missing persons and send their location quickly -> Option A

4. Quick Check:

   Search and rescue = find and report location [OK]

Hint: Search and rescue drones find and report targets fast [OK]

Common Mistakes:

• Confusing delivery drones with rescue drones
• Thinking drones only take photos
• Assuming drones monitor weather in rescue missions

2. Which of the following is the correct syntax to start a drone's search function in drone programming?

easy

A. startSearch()

B. search.start()

C. begin_search

D. searchStart[]

Solution

1. Step 1: Identify correct function call syntax

   Functions are called with parentheses like startSearch().

2. Step 2: Check other options for syntax errors

   search.start() is method call but not standard here; begin_search lacks parentheses; searchStart[] uses brackets incorrectly.

3. Final Answer:

   startSearch() -> Option A

4. Quick Check:

   Function calls use parentheses () [OK]

Hint: Function calls always use parentheses () [OK]

Common Mistakes:

• Omitting parentheses when calling functions
• Using brackets [] instead of parentheses
• Confusing method call syntax with function call

3. What will the following drone program output if the target is found at coordinates (10, 20)?

def search_area():
    target = (10, 20)
    found = True
    if found:
        return f"Target located at {target}"
    else:
        return "Target not found"

print(search_area())

medium

A. Target not found

B. Error: target undefined

C. Target located at (10, 20)

D. None

Solution

1. Step 1: Analyze the function logic

   The variable found is True, so the if condition is met.

2. Step 2: Determine the returned string

   The function returns the string with the target coordinates formatted inside.

3. Final Answer:

   Target located at (10, 20) -> Option C

4. Quick Check:

   found=True returns target location string [OK]

Hint: If found is True, function returns location string [OK]

Common Mistakes:

• Assuming found is False and returning 'Target not found'
• Confusing tuple printing with string output
• Expecting an error due to variable scope

4. Identify the error in this drone search code snippet:

def scan_area():
    target_found = False
    if target_found = True:
        print("Target found!")
    else:
        print("Searching...")

scan_area()

medium

A. Function scan_area is not called

B. Missing parentheses in print statements

C. Variable target_found is not defined

D. Using assignment '=' instead of comparison '==' in if condition

Solution

1. Step 1: Check the if condition syntax

   The condition uses '=' which assigns value, but it should compare using '=='.

2. Step 2: Verify other parts of the code

   Print statements have parentheses, function is called, and variable is defined correctly.

3. Final Answer:

   Using assignment '=' instead of comparison '==' in if condition -> Option D

4. Quick Check:

   Use '==' for comparison in if statements [OK]

Hint: Use '==' to compare, '=' is for assignment [OK]

Common Mistakes:

• Confusing '=' with '==' in conditions
• Forgetting to call the function
• Missing parentheses in print (Python 3)

5. You want a drone to scan multiple zones and report all found targets with their locations. Which code snippet correctly collects and returns all found targets in a dictionary with zone names as keys? Options: A)

def scan_zones(zones):
    results = {}
    for zone in zones:
        found = scan(zone)
        if found:
            results[zone] = found
    return results

B)

def scan_zones(zones):
    results = []
    for zone in zones:
        found = scan(zone)
        if found:
            results.append({zone: found})
    return results

C)

def scan_zones(zones):
    results = {}
    for zone in zones:
        found = scan(zone)
        results[zone] = found
    return results

D)

def scan_zones(zones):
    results = {}
    for zone in zones:
        if scan(zone):
            results.append(zone)
    return results

hard

A. Collects found targets in a list of dictionaries, not a single dict

B. Collects found targets in a dictionary with zone keys correctly

C. Adds all zones including those without targets (found may be False)

D. Uses append on a dictionary, which causes an error

Solution

1. Step 1: Understand the goal

   We want a dictionary with zones as keys and found targets as values, only if found.

2. Step 2: Analyze each option

   The snippet that adds only found targets to a dict is correct; the one that uses a list of dicts produces the wrong structure; the one that adds all zones includes those without targets; the one that tries to append to a dict causes an error.

3. Final Answer:

   Collects found targets in a dictionary with zone keys correctly -> Option B

4. Quick Check:

   Dict with keys for found targets only = Collects found targets in a dictionary with zone keys correctly [OK]

Hint: Use dict and add only found targets with keys [OK]

Common Mistakes:

• Adding all zones even if no target found
• Using list instead of dictionary for key-value pairs
• Trying to append to a dictionary (invalid)