Wearable technology in Intro to Computing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a wearable device's main function.

Intro to Computing

def wearable_device():
    return [1]

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

A"Smartwatch"

BSmartwatch

CTrue

D12345

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string.

Returning a number instead of a string.

The function should return a string describing the device. Strings must be in quotes.

2fill in blank

medium

Complete the code to check if a wearable device is active.

Intro to Computing

is_active = [1]
if is_active:
    print("Device is on")

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

Afalse

B"yes"

C1

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string "yes" instead of the boolean True.

Using lowercase true or false which are not valid in Python.

Boolean True means the device is active. It must be capitalized in Python.

3fill in blank

hard

Fix the error in the code to correctly calculate battery percentage.

Intro to Computing

battery_level = 80
max_battery = 100
percentage = battery_level [1] max_battery * 100
print(percentage)

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

A/

B-

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of division.

Multiplying battery_level by max_battery directly.

To find the percentage, divide battery_level by max_battery, then multiply by 100.

4fill in blank

hard

Fill both blanks to create a dictionary of wearable devices and their battery levels.

Intro to Computing

devices = {"watch": [1], "earbuds": [2]

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

A85

B"active"

C90

D"off"

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings like "active" instead of numbers.

Mixing numbers and strings incorrectly.

Battery levels are numbers, so use 85 and 90 without quotes.

5fill in blank

hard

Fill both blanks to filter devices with battery above 50%.

Intro to Computing

filtered = {k: v for k, v in devices.items() if v [1] [2]
print(filtered)

# Expected output: {'watch': 85, 'earbuds': 90}

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

A>

B50

C<

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than or equal instead of greater than.

Using equality instead of comparison.

The code filters devices where battery level (v) is greater than 50.

Practice

1. What is wearable technology primarily used for?

easy

A. Large desktop computers used for gaming

B. Small computers worn on the body to help with tasks and health tracking

C. Software programs installed on smartphones

D. Traditional wristwatches that only tell time

Solution

1. Step 1: Understand the definition of wearable technology

   Wearable technology refers to small computers worn on the body.

2. Step 2: Identify the main uses

   They help track health, show notifications, and make tasks easier.

3. Final Answer:

   Small computers worn on the body to help with tasks and health tracking -> Option B

4. Quick Check:

   Wearable technology = Small body-worn computers [OK]

Hint: Wearables are small computers worn on the body [OK]

Common Mistakes:

• Confusing wearable tech with large desktop computers
• Thinking wearable tech is just software
• Assuming all watches are wearable tech

2. Which of the following is the correct example of wearable technology?

easy

A. Tablet

B. Desktop computer

C. Smartwatch

D. Printer

Solution

1. Step 1: Recall examples of wearable technology

   Wearable technology includes devices like smartwatches, fitness bands, and smart glasses.

2. Step 2: Match options to wearable devices

   Only the smartwatch is worn on the body and fits the wearable tech definition.

3. Final Answer:

   Smartwatch -> Option C

4. Quick Check:

   Wearable example = Smartwatch [OK]

Hint: Wearables are devices worn on the body like smartwatches [OK]

Common Mistakes:

• Choosing devices not worn on the body
• Confusing tablets or printers as wearable
• Ignoring the 'worn on body' part

3. Consider this simple flowchart for a fitness band: Start -> Measure Heart Rate -> Is Heart Rate > 100? -> Yes -> Alert User -> End What is the output if the heart rate measured is 85?

medium

A. No alert, process ends

B. Error message

C. Alert User

D. Measure Heart Rate again

Solution

1. Step 1: Follow the flowchart steps with heart rate 85

   The heart rate is measured as 85, which is not greater than 100.

2. Step 2: Check condition and output

   Since 85 <= 100, the 'Yes' branch is not taken, so no alert is sent and the process ends.

3. Final Answer:

   No alert, process ends -> Option A

4. Quick Check:

   Heart rate 85 ≤ 100 -> No alert [OK]

Hint: If heart rate ≤ 100, no alert is triggered [OK]

Common Mistakes:

• Assuming alert triggers for all heart rates
• Confusing the condition > 100
• Thinking process repeats automatically

4. A smartwatch program is supposed to display a notification when steps exceed 10,000. The code snippet is:

if steps > 10000
  display('Goal reached!')

What is the error in this code?

medium

A. Incorrect comparison operator

B. Steps variable is not defined

C. Wrong function name for display

D. Missing colon after if condition

Solution

1. Step 1: Check Python syntax for if statements

   Python requires a colon ':' at the end of the if condition line.

2. Step 2: Identify missing colon in the code

   The code has 'if steps > 10000' without a colon, causing a syntax error.

3. Final Answer:

   Missing colon after if condition -> Option D

4. Quick Check:

   Python if needs ':' after condition [OK]

Hint: Always put ':' after if conditions in Python [OK]

Common Mistakes:

• Forgetting the colon after if
• Assuming display() is invalid without checking
• Thinking comparison operator is wrong

5. A fitness band tracks steps and heart rate. It should alert the user if steps are below 5000 and heart rate is above 120. Which logic correctly implements this in Python? A) if steps < 5000 and heart_rate > 120: alert('Check your health!') B) if steps > 5000 or heart_rate < 120: alert('Check your health!') C) if steps < 5000 or heart_rate > 120: alert('Check your health!') D) if steps > 5000 and heart_rate < 120: alert('Check your health!')

hard

A. Alert if steps below 5000 AND heart rate above 120

B. Alert if steps above 5000 OR heart rate below 120

C. Alert if steps below 5000 OR heart rate above 120

D. Alert if steps above 5000 AND heart rate below 120

Solution

1. Step 1: Understand the alert condition

   The alert triggers only when both steps are below 5000 AND heart rate is above 120.

2. Step 2: Match the condition with Python logic

   Alert if steps below 5000 AND heart rate above 120 uses 'and' with steps < 5000 and heart_rate > 120, which matches the requirement exactly.

3. Final Answer:

   Alert if steps below 5000 AND heart rate above 120 -> Option A

4. Quick Check:

   Both conditions must be true -> use 'and' [OK]

Hint: Use 'and' to require both conditions true [OK]

Common Mistakes:

• Using 'or' instead of 'and' for both conditions
• Reversing comparison operators
• Confusing steps and heart rate conditions