Altitude control in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the drone's target altitude to 100 meters.

Drone Programming

drone.set_target_altitude([1])

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

A100

B200

C0

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Using 50 or 200 instead of 100.

Setting altitude to 0 which means ground level.

The target altitude should be set to 100 meters as specified.

2fill in blank

medium

Complete the code to check if the drone's current altitude is above 80 meters.

Drone Programming

if drone.current_altitude [1] 80:

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

A<

B<=

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' which checks if altitude is below 80.

Using '==' which checks for exact equality.

The condition checks if the current altitude is greater than 80 meters.

3fill in blank

hard

Fix the error in the code to correctly increase the drone's altitude by 10 meters.

Drone Programming

drone.altitude = drone.altitude [1] 10

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

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' which decreases altitude.

Using '*' or '/' which are not for simple addition.

Use '+' to add 10 meters to the current altitude.

4fill in blank

hard

Fill both blanks to create a dictionary of altitudes for waypoints where altitude is above 50 meters.

Drone Programming

altitudes = {wp: drone.get_altitude(wp) [1] wp in waypoints if drone.get_altitude(wp) [2] 50}

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

Afor

Band

C>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'and' instead of 'for' in the loop.

Using '==' instead of '>' for filtering.

The dictionary comprehension uses 'for' to loop and '>' to filter altitudes above 50.

5fill in blank

hard

Fill all three blanks to create a dictionary of waypoints with altitudes above 30 meters, using uppercase waypoint names.

Drone Programming

high_points = [1]: drone.get_altitude([2]) for [3] in waypoints if drone.get_altitude([3]) > 30}

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

Awp.upper()

Bwp

Dpoint

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Not converting waypoint names to uppercase.

The dictionary keys are uppercase waypoint names, values are altitudes, and 'wp' is the loop variable.

Practice

1. What is the main purpose of altitude control in drone programming?

easy

A. To keep or change the drone's height safely

B. To control the drone's speed horizontally

C. To manage the drone's battery life

D. To adjust the drone's camera angle

Solution

1. Step 1: Understand altitude control function

   Altitude control is about managing the drone's height above ground.

2. Step 2: Compare options to this function

   Only To keep or change the drone's height safely talks about height control, others focus on speed, battery, or camera.

3. Final Answer:

   To keep or change the drone's height safely -> Option A

4. Quick Check:

   Altitude control = height management [OK]

Hint: Altitude control means managing drone height safely [OK]

Common Mistakes:

• Confusing altitude with speed control
• Thinking altitude control manages battery
• Mixing altitude control with camera settings

2. Which of the following is the correct syntax to set a target altitude of 100 meters in a drone program?

easy

A. altitude = 100m

B. setAltitude(100)

C. targetAltitude = '100'

D. set_altitude = 100

Solution

1. Step 1: Identify correct function call syntax

   Function calls use parentheses with numeric values, like setAltitude(100).

2. Step 2: Check other options for syntax errors

   altitude = 100m uses invalid unit '100m' without quotes or function; C uses string instead of number; D assigns value but not a function call.

3. Final Answer:

   setAltitude(100) -> Option B

4. Quick Check:

   Function call with number = setAltitude(100) [OK]

Hint: Function calls use parentheses with numbers, not strings or units [OK]

Common Mistakes:

• Using units like '100m' directly in code
• Assigning string instead of number for altitude
• Confusing assignment with function call

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

current_altitude = 50
set_target = 100
if current_altitude < set_target:
    print('Ascending')
else:
    print('Holding position')

medium

A. Holding position

B. Descending

C. Ascending

D. Error

Solution

1. Step 1: Compare current altitude and target

   current_altitude is 50, set_target is 100, so 50 < 100 is True.

2. Step 2: Determine which print runs

   Since condition is True, it prints 'Ascending'.

3. Final Answer:

   Ascending -> Option C

4. Quick Check:

   50 < 100 means Ascending [OK]

Hint: If current altitude less than target, drone ascends [OK]

Common Mistakes:

• Confusing less than with greater than
• Expecting 'Holding position' when ascending
• Thinking code has syntax error

4. Identify the error in this altitude control code snippet:

def adjust_altitude(current, target):
    if current > target
        return 'Descending'
    else:
        return 'Ascending'

medium

A. Indentation error in else block

B. Wrong comparison operator

C. Function missing return statement

D. Missing colon after if condition

Solution

1. Step 1: Check syntax of if statement

   The if line lacks a colon at the end, which is required in Python.

2. Step 2: Verify other parts

   Comparison operator and return statements are correct; indentation is consistent.

3. Final Answer:

   Missing colon after if condition -> Option D

4. Quick Check:

   Python if needs colon ':' [OK]

Hint: Python if statements always end with a colon ':' [OK]

Common Mistakes:

• Forgetting colon after if condition
• Assuming wrong operator causes error
• Misreading indentation as error

5. You want the drone to hover steadily at 120 meters. Which code snippet correctly adjusts motor power based on current altitude to maintain this target?

def control_altitude(current):
    target = 120
    if current < target:
        power = 70
    elif current > target:
        power = 30
    else:
        power = 50
    return power

print(control_altitude(120))

hard

A. 50

B. 70

C. 30

D. 120

Solution

1. Step 1: Understand the target and current altitude

   Target is 120 meters; current altitude passed is 120.

2. Step 2: Follow the if-elif-else logic

   Since current equals target, the else block runs, setting power to 50.

3. Final Answer:

   50 -> Option A

4. Quick Check:

   Hover power at target altitude = 50 [OK]

Hint: At target altitude, motor power is set to hover value [OK]

Common Mistakes:

• Choosing power for ascending or descending instead of hover
• Confusing comparison operators
• Returning altitude instead of power