Altitude limits configuration in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the maximum altitude limit to 120 meters.

Drone Programming

drone.set_max_altitude([1])

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

A150

B120

C100

D200

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value lower or higher than 120 will not set the correct altitude limit.

The maximum altitude is set by passing the value 120 to the set_max_altitude method.

2fill in blank

medium

Complete the code to check if the current altitude exceeds the minimum altitude limit of 10 meters.

Drone Programming

if drone.current_altitude [1] 10:

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' would check if altitude is below 10 meters, which is incorrect here.

The condition checks if the current altitude is greater than 10 meters, meaning it exceeds the minimum altitude limit.

3fill in blank

hard

Fix the error in the code to correctly set both minimum and maximum altitude limits.

Drone Programming

drone.set_altitude_limits(min=[1], max=120)

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

A5

B150

C-10

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting a negative minimum altitude causes errors.

The minimum altitude limit should be 0 meters or higher. Negative values like -10 are invalid.

4fill in blank

hard

Fill both blanks to create a dictionary of altitude limits with keys 'min' and 'max'.

Drone Programming

altitude_limits = {'min': [1], 'max': [2]

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

A0

B120

C100

D-5

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative values or wrong maximum altitude values.

The minimum altitude is 0 meters and the maximum altitude is 120 meters as per configuration.

5fill in blank

hard

Fill all three blanks to filter altitude readings between minimum and maximum limits.

Drone Programming

valid_altitudes = [alt for alt in readings if alt [1] min_limit and alt [2] max_limit and alt != [3]]

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

A>

B<

CNone

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operators or not excluding None values.

The code filters altitudes greater than min_limit, less than max_limit, and excludes None values.

Practice

1. What is the main purpose of using setAltitudeLimits(min, max) in drone programming?

easy

A. To control the drone's speed

B. To set the minimum and maximum altitude the drone can fly

C. To change the drone's camera angle

D. To start the drone's engine

Solution

1. Step 1: Understand the function name and parameters

   The function setAltitudeLimits(min, max) clearly suggests setting limits related to altitude using minimum and maximum values.

2. Step 2: Match the function purpose with options

   Among the options, only setting altitude boundaries matches the function's name and parameters.

3. Final Answer:

   To set the minimum and maximum altitude the drone can fly -> Option B

4. Quick Check:

   Altitude limits = min and max altitude [OK]

Hint: Look for min and max altitude in the function name [OK]

Common Mistakes:

• Confusing altitude limits with speed control
• Thinking it controls camera or engine
• Ignoring parameter names min and max

2. Which of the following is the correct syntax to set altitude limits from 10 to 100 meters?

easy

A. setAltitudeLimits(10, 100);

B. setAltitudeLimits[10, 100];

C. setAltitudeLimits{10, 100};

D. setAltitudeLimits 10, 100;

Solution

1. Step 1: Identify correct function call syntax

   Function calls use parentheses () with arguments separated by commas.

2. Step 2: Check each option's syntax

   setAltitudeLimits(10, 100); uses parentheses and commas correctly. Options B and C use brackets or braces which are invalid for function calls. setAltitudeLimits 10, 100; misses parentheses.

3. Final Answer:

   setAltitudeLimits(10, 100); -> Option A

4. Quick Check:

   Function call syntax = parentheses ( ) [OK]

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

Common Mistakes:

• Using square brackets or braces instead of parentheses
• Omitting parentheses around arguments
• Missing commas between arguments

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

setAltitudeLimits(50, 200);
print(getAltitudeLimits());

Assuming getAltitudeLimits() returns the current limits as a list [min, max].

medium

A. Error: function not defined

B. [200, 50]

C. [50, 200]

D. [0, 0]

Solution

1. Step 1: Understand the function calls

   setAltitudeLimits(50, 200) sets the limits to minimum 50 and maximum 200. getAltitudeLimits() returns the current limits as a list [min, max].

2. Step 2: Predict the output of print statement

   Since limits were set to 50 and 200, the output will be [50, 200].

3. Final Answer:

   [50, 200] -> Option C

4. Quick Check:

   Set then get limits = [50, 200] [OK]

Hint: Set limits first, then get returns same values [OK]

Common Mistakes:

• Swapping min and max values in output
• Assuming default limits without setting
• Thinking function returns error

4. Identify the error in this code snippet:

setAltitudeLimits(150, 100);
print(getAltitudeLimits());

Assuming setAltitudeLimits(min, max) requires min < max.

medium

A. Minimum altitude is greater than maximum altitude

B. Missing semicolon after setAltitudeLimits

C. getAltitudeLimits() is not defined

D. No error, code runs fine

Solution

1. Step 1: Check the order of min and max values

   The code calls setAltitudeLimits(150, 100) where min=150 and max=100, which violates the rule min < max.

2. Step 2: Identify the error caused by invalid limits

   Since min is greater than max, this is an error in setting altitude limits.

3. Final Answer:

   Minimum altitude is greater than maximum altitude -> Option A

4. Quick Check:

   min < max required, here min=150 > max=100 [OK]

Hint: Min altitude must be less than max altitude [OK]

Common Mistakes:

• Ignoring min < max rule
• Thinking semicolon is mandatory in all languages
• Assuming getAltitudeLimits() is undefined

5. You want to configure altitude limits so the drone flies only between 20 and 120 meters. Which code snippet correctly applies this and prevents invalid input?

hard

A. setAltitudeLimits(120, 20);

B. setAltitudeLimits(max, min); // with min=20, max=120

C. if (min > max) { setAltitudeLimits(min, max); }

D. if (min < max) { setAltitudeLimits(min, max); } else { print('Invalid limits'); } // with min=20, max=120

Solution

1. Step 1: Check condition to validate inputs

   We must ensure min is less than max before setting limits to avoid errors.

2. Step 2: Analyze each option's logic

   if (min < max) { setAltitudeLimits(min, max); } else { print('Invalid limits'); } // with min=20, max=120 checks if min < max and sets limits only if true, else prints error. Options A and B swap min and max incorrectly. if (min > max) { setAltitudeLimits(min, max); } uses wrong condition min > max.

3. Final Answer:

   if (min < max) { setAltitudeLimits(min, max); } else { print('Invalid limits'); } // with min=20, max=120 -> Option D

4. Quick Check:

   Validate min < max before setting limits [OK]

Hint: Always check min < max before setting limits [OK]

Common Mistakes:

• Swapping min and max values
• Using wrong condition for validation
• Not handling invalid input cases