Altitude limits configuration in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this altitude check code?

Given the drone altitude limits set between 10 and 120 meters, what will the program print when the altitude is 130?

Drone Programming

min_altitude = 10
max_altitude = 120
current_altitude = 130
if current_altitude < min_altitude:
    print("Below minimum altitude")
elif current_altitude > max_altitude:
    print("Above maximum altitude")
else:
    print("Altitude within limits")

A Above maximum altitude

B Below minimum altitude

C Altitude within limits

D No output

💡 Hint

Check the condition that compares current altitude with max altitude.

The current altitude (130) is greater than the max altitude (120), so the program prints 'Above maximum altitude'.

❓ Predict Output

intermediate

What is the value of 'safe_to_fly' after running this code?

The drone must fly only if altitude is between 20 and 100 meters inclusive. What is the value of 'safe_to_fly' if altitude is 20?

Drone Programming

min_altitude = 20
max_altitude = 100
altitude = 20
safe_to_fly = min_altitude <= altitude <= max_altitude

A False

B True

C None

D Error

💡 Hint

Check if the altitude is within the inclusive range.

Since altitude is exactly the minimum limit (20), the condition is true and 'safe_to_fly' is True.

🔧 Debug

advanced

What error does this altitude validation code raise?

Identify the error when running this code that checks if altitude is within limits.

Drone Programming

min_altitude = 15
max_altitude = 90
altitude = 50
if altitude > min_altitude and altitude < max_altitude:
    print("Altitude OK")
else:
    print("Altitude out of range")

A NameError: name 'altitude' is not defined

B TypeError: unsupported operand type(s) for >

C SyntaxError: expected ':' after else

D No error, prints 'Altitude OK'

💡 Hint

Look carefully at the else statement syntax.

The else statement is missing a colon at the end, causing a SyntaxError.

❓ Predict Output

advanced

How many altitude values are stored after this configuration?

The code stores altitude limits in a dictionary for different zones. How many zones are configured?

Drone Programming

altitude_limits = {
    'zone1': (10, 50),
    'zone2': (20, 80),
    'zone3': (15, 60),
    'zone4': (5, 100)
}
print(len(altitude_limits))

A Error

B 3

C 5

D 4

💡 Hint

Count the number of keys in the dictionary.

There are 4 keys (zone1, zone2, zone3, zone4), so len() returns 4.

🧠 Conceptual

expert

Which option correctly describes the effect of this altitude limit code snippet?

Consider this code snippet that sets altitude limits and checks a drone's altitude: min_altitude = 30 max_altitude = 90 altitude = 90 if altitude >= min_altitude and altitude <= max_altitude: status = "Safe" else: status = "Unsafe" What is the value of 'status' and why?

A "Safe" because altitude equals the maximum limit and the condition includes equality

B "Safe" because altitude is greater than min_altitude only

C "Unsafe" because altitude equals max_altitude which is not allowed

D "Unsafe" because altitude must be strictly less than max_altitude

💡 Hint

Check the comparison operators used in the condition.

The condition uses >= and <= which include equality, so altitude equal to max_altitude is considered safe.

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