Edge computing basics in Intro to Computing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is edge computing?

Edge computing means processing data near where it is created instead of sending it far away to a central place. It helps make things faster and saves internet traffic.

beginner

Why is edge computing useful?

It reduces delay (latency), saves bandwidth, and can keep data private by processing it locally instead of sending it to a far server.

beginner

Give a real-life example of edge computing.

A smart security camera that detects motion and alerts you immediately without sending video to a far server first is using edge computing.

intermediate

What is the difference between edge computing and cloud computing?

Cloud computing processes data in big data centers far away. Edge computing processes data close to the device or user, near the 'edge' of the network.

beginner

What kind of devices are used in edge computing?

Devices like routers, gateways, small servers, or smart devices themselves can do edge computing by processing data locally.

What does edge computing mainly aim to reduce?

A Battery life

B Number of devices

C Delay in data processing

D Screen size

Edge computing reduces delay (latency) by processing data near the source.

Which of these is an example of edge computing?

A Processing data on a local smart thermostat

B Watching videos online

C Storing data on a USB drive

D Sending all data to a cloud server for processing

Processing data on a local device like a smart thermostat is edge computing.

Edge computing helps save which of the following?

A Number of users

B Electricity in data centers only

C Screen resolution

D Internet bandwidth

By processing data locally, edge computing reduces the amount of data sent over the internet, saving bandwidth.

Where is data processed in cloud computing compared to edge computing?

A Cloud: far away; Edge: locally

B Cloud: locally; Edge: far away

C Both locally

D Both far away

Cloud computing processes data in distant data centers; edge computing processes data near the source.

Which device is least likely to perform edge computing?

A Smartphone

B Cloud data center

C Local router

D Smart security camera

Cloud data centers are centralized and not considered edge devices.

Explain edge computing in your own words and why it is important.

Think about how your smart devices work faster by handling data nearby.

Describe a real-world example where edge computing is used and how it benefits users.

Imagine a device that reacts quickly without waiting for the internet.

Practice

1. What is the main idea of edge computing?

easy

A. Using only wired internet connections

B. Sending all data to a central cloud server

C. Processing data near where it is created

D. Storing data only on personal devices

Solution

1. Step 1: Understand the location of data processing

   Edge computing means data is processed close to the source, not far away.

2. Step 2: Compare options with this idea

   Only Processing data near where it is created matches this idea; others describe cloud or unrelated concepts.

3. Final Answer:

   Processing data near where it is created -> Option C

4. Quick Check:

   Edge computing = local data processing [OK]

Hint: Edge means close to the source, not far away [OK]

Common Mistakes:

• Confusing edge computing with cloud computing
• Thinking edge means storing data only on devices
• Assuming edge requires wired connections

2. Which of the following is the correct way to describe edge computing?

easy

A. Data is processed on or near the device generating it

B. Data is sent to a distant server for processing

C. Data is never processed, only stored

D. Data is processed only in large data centers

Solution

1. Step 1: Identify the processing location in edge computing

   Edge computing processes data on or near the device creating it.

2. Step 2: Match this with the options

   Data is processed on or near the device generating it correctly states this; others describe cloud or incorrect ideas.

3. Final Answer:

   Data is processed on or near the device generating it -> Option A

4. Quick Check:

   Edge computing = local processing [OK]

Hint: Edge means near the device, not far away [OK]

Common Mistakes:

• Choosing cloud processing as edge computing
• Thinking data is only stored, not processed
• Confusing edge with centralized data centers

3. Consider this flowchart for edge computing:



What is the main benefit shown by this flow?

medium

A. Faster response by processing data locally

B. More data sent to cloud for storage

C. Data is never sent to cloud

D. Devices do not generate data

Solution

1. Step 1: Analyze the flowchart steps

   Data is generated by device, processed locally, then only summary is sent to cloud.

2. Step 2: Understand the benefit

   Processing locally means faster response and less data sent over internet.

3. Final Answer:

   Faster response by processing data locally -> Option A

4. Quick Check:

   Local processing = faster response [OK]

Hint: Local processing speeds up response time [OK]

Common Mistakes:

• Thinking all data is sent to cloud
• Assuming devices do not generate data
• Ignoring local processing step

4. A developer wrote this description:

Edge computing sends all data to the cloud for processing.

What is wrong with this statement?

medium

A. Edge computing only stores data, no processing

B. Edge computing processes data locally, not all in cloud

C. Edge computing never uses cloud at all

D. Edge computing requires wired connections

Solution

1. Step 1: Identify the key feature of edge computing

   Edge computing processes data near the source, not sending all data to cloud.

2. Step 2: Compare with the statement

   The statement says all data is sent to cloud, which is incorrect for edge computing.

3. Final Answer:

   Edge computing processes data locally, not all in cloud -> Option B

4. Quick Check:

   Edge computing ≠ all cloud processing [OK]

Hint: Edge means local processing, not full cloud sending [OK]

Common Mistakes:

• Believing edge computing never uses cloud
• Thinking edge only stores data
• Assuming edge requires wired internet

5. A smart traffic light uses edge computing to decide when to change lights quickly. Which of these is the best reason to use edge computing here?

hard

A. To process data only during off-peak hours

B. To send all video footage to a distant cloud for storage

C. To avoid using any internet connection at all

D. To reduce delay by processing data near the traffic light

Solution

1. Step 1: Understand the need for quick decisions

   Traffic lights must respond fast to changing conditions to keep traffic safe.

2. Step 2: Identify edge computing benefit

   Processing data near the traffic light reduces delay and speeds up decisions.

3. Step 3: Evaluate options

   To reduce delay by processing data near the traffic light matches this benefit; others do not support fast local processing.

4. Final Answer:

   To reduce delay by processing data near the traffic light -> Option D

5. Quick Check:

   Edge computing = faster local decisions [OK]

Hint: Edge computing cuts delay by local processing [OK]

Common Mistakes:

• Thinking all data must be sent to cloud
• Assuming no internet is used at all
• Believing processing only happens off-peak