goto() command for navigation in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of goto() with simple coordinates

What will be the output of this drone navigation code snippet?

Drone Programming

drone.goto(10, 20, 5)
print(drone.position())

A (10, 20)

B (0, 0, 0)

C (10, 20, 5)

D Error: Invalid coordinates

💡 Hint

The goto() command moves the drone to the specified x, y, z coordinates.

The drone.goto(10, 20, 5) moves the drone to position (10, 20, 5). The position() method returns the current coordinates.

❓ Predict Output

intermediate

Effect of sequential goto() commands

What will be the drone's final position after running this code?

Drone Programming

drone.goto(5, 5, 5)
drone.goto(10, 0, 0)
print(drone.position())

A (5, 5, 5)

B (0, 0, 0)

C (15, 5, 5)

D (10, 0, 0)

💡 Hint

Each goto() command moves the drone to a new absolute position.

The drone first moves to (5, 5, 5), then moves to (10, 0, 0). The final position is the last goto() coordinates.

🔧 Debug

advanced

Identify the error in goto() usage

This code is intended to move the drone to (10, 10, 10). What error will it cause?

Drone Programming

drone.goto(10, 10)
print(drone.position())

A TypeError: missing 1 required positional argument 'z'

B SyntaxError: invalid syntax

C ValueError: coordinates must be positive

D No error, outputs (10, 10, 0)

💡 Hint

The goto() command requires three coordinates: x, y, and z.

The goto() function expects three arguments. Providing only two causes a TypeError for missing the z coordinate.

🧠 Conceptual

advanced

Understanding relative vs absolute goto()

Which statement correctly describes the difference between absolute and relative goto() commands?

A Absolute goto() moves the drone by offsets; relative goto() moves it to exact coordinates.

B Absolute goto() moves the drone to exact coordinates; relative goto() moves it by offsets from current position.

C Both absolute and relative goto() move the drone to exact coordinates but use different units.

D Relative goto() moves the drone to the origin; absolute goto() moves it randomly.

💡 Hint

Think about whether the drone moves to a fixed point or moves relative to where it is now.

Absolute goto() uses fixed coordinates. Relative goto() moves the drone by adding offsets to its current position.

❓ Predict Output

expert

Output after complex navigation sequence

What is the final position printed by this code?

Drone Programming

drone.goto(0, 0, 0)
drone.goto(5, 5, 5)
drone.goto(5, 10, 5)
drone.goto(10, 10, 10)
print(drone.position())

A (10, 10, 10)

B (5, 10, 5)

C (0, 0, 0)

D (15, 25, 20)

💡 Hint

Each goto() sets the drone's position absolutely, not cumulatively.

The drone moves step-by-step to each specified coordinate. The last goto() sets the final position.

Practice

1. What does the goto(x, y, z, speed) command do in drone programming?

easy

A. Moves the drone to the specified coordinates at the given speed.

B. Starts the drone's camera recording.

C. Lands the drone immediately.

D. Turns the drone around 360 degrees.

Solution

1. Step 1: Understand the purpose of goto()

   The goto() command is designed to move the drone to a specific location using coordinates.

2. Step 2: Analyze the parameters

   The parameters x, y, z represent the position in space, and speed controls how fast the drone moves there.

3. Final Answer:

   Moves the drone to the specified coordinates at the given speed. -> Option A

4. Quick Check:

   goto() moves drone = A [OK]

Hint: Remember: goto() moves drone to coordinates fast or slow [OK]

Common Mistakes:

• Confusing goto() with camera or landing commands
• Ignoring the speed parameter
• Thinking goto() rotates the drone

2. Which of the following is the correct syntax to move a drone to position (10, 20, 5) at speed 3 using goto()?

easy

A. goto(10, 20, 3, 5)

B. goto(10, 20, 5, 3)

C. goto(3, 10, 20, 5)

D. goto(5, 3, 10, 20)

Solution

1. Step 1: Identify parameter order

   The goto() command takes parameters in order: x, y, z, speed.

2. Step 2: Match values to parameters

   Given position (10, 20, 5) and speed 3, the correct call is goto(10, 20, 5, 3).

3. Final Answer:

   goto(10, 20, 5, 3) -> Option B

4. Quick Check:

   Order is x,y,z,speed = C [OK]

Hint: Remember parameter order: x, y, z, then speed [OK]

Common Mistakes:

• Mixing up speed with coordinate values
• Changing parameter order
• Using wrong numbers for coordinates

3. What will be the drone's final position after running this code?

goto(5, 5, 10, 2)
goto(10, 10, 5, 4)

medium

A. (0, 0, 0)

B. (5, 5, 10)

C. (15, 15, 15)

D. (10, 10, 5)

Solution

1. Step 1: Execute first goto()

   The drone moves to coordinates (5, 5, 10) at speed 2.

2. Step 2: Execute second goto()

   The drone then moves to (10, 10, 5) at speed 4, which is the final position.

3. Final Answer:

   (10, 10, 5) -> Option D

4. Quick Check:

   Last goto() position = A [OK]

Hint: Last goto() sets final position, earlier ones are overwritten [OK]

Common Mistakes:

• Adding coordinates instead of replacing
• Ignoring the second goto()
• Confusing speed with position

4. Identify the error in this code snippet:

goto(10, 20, speed=5, 3)

medium

A. Speed parameter is given before z coordinate.

B. No error; code is correct.

C. Using named argument for speed but position parameters are positional.

D. Missing one coordinate parameter.

Solution

1. Step 1: Check parameter usage

   The code mixes positional and named arguments incorrectly by placing speed=5 before the last positional argument.

2. Step 2: Understand Python argument rules

   Positional arguments must come before named arguments; here, 3 is positional after a named argument, causing a syntax error.

3. Final Answer:

   Using named argument for speed but position parameters are positional. -> Option C

4. Quick Check:

   Named args after positional = D [OK]

Hint: Named arguments must come after all positional ones [OK]

Common Mistakes:

• Placing named arguments before positional
• Assuming order doesn't matter
• Missing commas between parameters

5. You want the drone to inspect three points in order: (0,0,5), (10,0,5), and (10,10,5), each at speed 2. Which code correctly uses goto() to do this?

hard

A. goto(0, 0, 5, 2)
goto(10, 0, 5, 2)
goto(10, 10, 5, 2)

B. goto([0,0,5], 2)
goto([10,0,5], 2)
goto([10,10,5], 2)

C. goto(0, 0, 5)
goto(10, 0, 5)
goto(10, 10, 5)

D. goto(0, 0, 5, 2, 3)
goto(10, 0, 5, 2, 3)
goto(10, 10, 5, 2, 3)

Solution

1. Step 1: Check parameter correctness

   Each goto() call must have four parameters: x, y, z, and speed.

2. Step 2: Validate each option

   goto(0, 0, 5, 2) goto(10, 0, 5, 2) goto(10, 10, 5, 2) correctly uses four parameters per call. goto([0,0,5], 2) goto([10,0,5], 2) goto([10,10,5], 2) uses lists instead of separate coordinates. goto(0, 0, 5) goto(10, 0, 5) goto(10, 10, 5) misses speed. goto(0, 0, 5, 2, 3) goto(10, 0, 5, 2, 3) goto(10, 10, 5, 2, 3) has an extra parameter.

3. Final Answer:

   goto(0, 0, 5, 2) goto(10, 0, 5, 2) goto(10, 10, 5, 2) -> Option A

4. Quick Check:

   Correct parameters and order = B [OK]

Hint: Use four parameters: x, y, z, speed for each goto() [OK]

Common Mistakes:

• Passing coordinates as a list instead of separate values
• Omitting speed parameter
• Adding extra parameters