Wearable technology in Intro to Computing - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is a key feature of wearable technology?

Wearable technology is designed to be worn on the body. Which of the following best describes a key feature of wearable technology?

A It must be connected to the internet at all times to work.

B It is designed to be worn and often tracks health or activity data.

C It is always a large device that cannot be carried easily.

D It only works when plugged into a computer.

💡 Hint

Think about devices like smartwatches or fitness bands.

Wearable technology is small devices worn on the body that often track health or activity data, like steps or heart rate.

❓ Comparison

intermediate

How does wearable technology differ from traditional computers?

Which option best explains how wearable technology differs from traditional desktop or laptop computers?

A Wearables are larger and less portable than traditional computers.

B Wearables always have a physical keyboard, unlike traditional computers.

C Wearables cannot connect to the internet, while traditional computers can.

D Wearables are designed to be worn and provide continuous data collection, unlike traditional computers.

💡 Hint

Consider portability and data collection features.

Wearables are small devices worn on the body and often collect data continuously, unlike traditional computers which are larger and not worn.

❓ trace

advanced

Trace the data flow in a wearable fitness tracker

Consider a wearable fitness tracker that measures steps and heart rate. Which sequence correctly shows the flow of data from measurement to user display?

A 1,2,3,4

B 2,1,3,4

C 1,3,2,4

D 3,1,2,4

💡 Hint

Think about the order from sensing to displaying data.

The sensors first detect data, then the processor handles it, stores it temporarily, and finally the data is displayed or synced.

❓ identification

advanced

Identify the main privacy concern with wearable technology

Wearable devices collect personal data continuously. What is the main privacy concern related to this?

A Personal data could be accessed or shared without permission.

B The devices use too much battery power.

C Wearables are too expensive for most people.

D The devices are difficult to wear comfortably.

💡 Hint

Think about data security and user control.

The main privacy concern is that personal data collected by wearables could be accessed or shared without the user's permission, risking privacy.

🚀 Application

expert

Which wearable technology feature best supports accessibility?

A wearable device helps a user with hearing loss by converting sounds into vibrations. Which feature best describes this?

A GPS tracking for location services

B Battery saving mode to extend usage

C Haptic feedback to provide sensory alerts

D Data synchronization with cloud storage

💡 Hint

Think about how the device communicates alerts without sound.

Haptic feedback uses vibrations to alert users, which is helpful for those with hearing impairments.

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