Speed control during mission in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the drone's speed to 5 meters per second.

Drone Programming

drone.set_speed([1])

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

A5

Bspeed

C10

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name instead of a number.

Setting speed to 0 which stops the drone.

The drone's speed is set by passing the desired speed value to set_speed(). Here, 5 means 5 meters per second.

2fill in blank

medium

Complete the code to increase the drone's speed by 2 meters per second.

Drone Programming

drone.set_speed(drone.speed [1] 2)

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

A/

B-

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using minus which decreases speed.

Using multiplication or division which changes speed incorrectly.

To increase speed, add 2 to the current speed using the plus operator +.

3fill in blank

hard

Fix the error in the code to set the drone speed only if it is less than 10.

Drone Programming

if drone.speed [1] 10:
    drone.set_speed(10)

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

A>

B==

C<

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using greater than which reverses the logic.

Using equality which only matches exactly 10.

The condition should check if the current speed is less than 10 using the < operator.

4fill in blank

hard

Fill both blanks to create a dictionary of speeds for each waypoint where speed is doubled if altitude is above 100.

Drone Programming

speeds = {wp: drone.speed [1] 2 for wp, alt in waypoints.items() if alt [2] 100}

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

A*

B+

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition instead of multiplication.

Using less than instead of greater than for altitude.

The speed is doubled using * and the altitude condition checks if altitude is greater than 100 using >.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping waypoint names in uppercase to their speeds if speed is above 3.

Drone Programming

speed_map = { [1]: [2] for [3], speed in drone_data.items() if speed > 3 }

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

Awp.upper()

Bspeed

Cwp

Daltitude

Attempts:

3 left

💡 Hint

Common Mistakes

Using altitude instead of waypoint name.

Using wrong variable names in the loop.

The key is the waypoint name in uppercase using wp.upper(), the value is the speed, and the loop variable for waypoint is wp.

Practice

1. What is the main reason to adjust the drone's speed during a mission?

easy

A. To save battery by flying as fast as possible

B. To change the drone's color

C. To make the drone hover in place

D. To fly slower near obstacles for safety

Solution

1. Step 1: Understand speed control purpose

   Speed control helps adjust how fast the drone flies to match mission needs.

2. Step 2: Identify safety reason

   Flying slower near obstacles reduces crash risk and improves control.

3. Final Answer:

   To fly slower near obstacles for safety -> Option D

4. Quick Check:

   Safety needs slower speed near obstacles = B [OK]

Hint: Slower speed near obstacles means safer flight [OK]

Common Mistakes:

• Thinking faster speed always saves battery
• Confusing speed control with hovering
• Believing speed changes drone color

2. Which of the following is the correct way to set the drone speed to 5 meters per second in code?

easy

A. setSpeed(drone, 5)

B. drone.speed = '5mps'

C. drone.setSpeed(5)

D. drone.speed(5)

Solution

1. Step 1: Identify correct method syntax

   The method to set speed is called on the drone object with a number argument.

2. Step 2: Check each option

   drone.setSpeed(5) uses drone.setSpeed(5) which is correct syntax for setting speed to 5.

3. Final Answer:

   drone.setSpeed(5) -> Option C

4. Quick Check:

   Method call with number argument = A [OK]

Hint: Use object.method(value) to set speed [OK]

Common Mistakes:

• Using string instead of number for speed
• Calling speed as a function instead of method
• Passing drone as argument instead of calling method on it

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

drone.setSpeed(3)
print(drone.speed)

medium

A. None

B. 3

C. Error: speed attribute not found

D. drone.setSpeed(3)

Solution

1. Step 1: Understand setSpeed effect

   Calling drone.setSpeed(3) sets the drone's speed attribute to 3.

2. Step 2: Print drone.speed value

   Printing drone.speed outputs the current speed value, which is 3.

3. Final Answer:

   3 -> Option B

4. Quick Check:

   Set speed to 3, print speed = 3 [OK]

Hint: setSpeed changes speed attribute; print shows it [OK]

Common Mistakes:

• Expecting method call to print
• Assuming speed attribute is missing
• Confusing method name with attribute

4. The following code is intended to set the drone speed to 10 m/s but causes an error. What is the problem?

drone.setspeed(10)

medium

A. Method name is case-sensitive; should be setSpeed

B. Speed value 10 is too high and causes error

C. Missing parentheses after method name

D. drone object is not defined

Solution

1. Step 1: Check method name spelling

   Method names are case-sensitive; 'setspeed' is incorrect, correct is 'setSpeed'.

2. Step 2: Confirm other options

   Speed 10 is valid, parentheses are present, and drone object assumed defined.

3. Final Answer:

   Method name is case-sensitive; should be setSpeed -> Option A

4. Quick Check:

   Case-sensitive method names cause errors = A [OK]

Hint: Check exact method name spelling and case [OK]

Common Mistakes:

• Ignoring case sensitivity in method names
• Assuming value too high causes error
• Forgetting parentheses after method

5. You want the drone to fly slower near obstacles and faster in open areas during a mission. Which code snippet correctly changes speed based on distance to obstacle?

distance = drone.getDistance()
if distance < 5:
    drone.setSpeed(2)
else:
    drone.setSpeed(8)

hard

A. Correctly sets speed slower near obstacles and faster otherwise

B. Sets speed faster near obstacles, which is unsafe

C. Uses wrong comparison operator; should be distance > 5

D. Does not change speed at all

Solution

1. Step 1: Understand distance check

   Code checks if distance to obstacle is less than 5 meters.

2. Step 2: Analyze speed settings

   If close (distance < 5), speed is set to 2 (slow). Else speed is 8 (fast). This matches safe speed control.

3. Final Answer:

   Correctly sets speed slower near obstacles and faster otherwise -> Option A

4. Quick Check:

   Distance check controls speed safely = C [OK]

Hint: Use if distance < threshold for slower speed [OK]

Common Mistakes:

• Reversing comparison operator
• Setting faster speed near obstacles
• Not calling setSpeed inside condition