Cellular networks (4G, 5G) in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to identify the main purpose of 4G networks.

Computer Networks

4G networks primarily provide [1] connectivity for mobile devices.

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

Aslow

Bsatellite

Chigh-speed

Dwired

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'slow' because of confusion with older networks.

Selecting 'wired' since cellular networks are wireless.

4G networks are designed to provide high-speed wireless connectivity to mobile devices, enabling faster internet access and better streaming quality.

2fill in blank

medium

Complete the sentence to describe a key feature of 5G networks.

Computer Networks

5G networks offer [1] latency, which means faster response times for applications.

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

Alower

Bvariable

Chigher

Dunchanged

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'higher' latency, which would mean slower responses.

Selecting 'unchanged' because 5G improves many aspects.

5G networks provide lower latency, meaning the delay between sending and receiving data is much shorter, improving real-time applications like gaming and video calls.

3fill in blank

hard

Fix the error in the sentence about 4G technology.

Computer Networks

4G networks use [1] technology to transmit data over long distances.

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

Asatellite signals

Bradio waves

Cfiber optic

Dinfrared

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'fiber optic' which is used for wired internet.

Selecting 'infrared' which is short-range and not used in 4G.

4G networks transmit data using radio waves, which are electromagnetic waves suitable for wireless communication over distances.

4fill in blank

hard

Fill both blanks to complete the description of 5G network benefits.

Computer Networks

5G networks support [1] device connections and provide [2] data speeds compared to 4G.

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

Amore

Bfewer

Chigher

Dlower

Attempts:

3 left

💡 Hint

Common Mistakes

Selecting 'fewer' devices which is incorrect for 5G.

Choosing 'lower' speeds which contradicts 5G improvements.

5G networks can connect more devices simultaneously and offer higher data speeds than 4G, enabling better performance for many users and applications.

5fill in blank

hard

Fill all three blanks to complete the explanation of 5G technology features.

Computer Networks

5G uses [1] frequency bands, employs [2] antenna technology, and supports [3] network slicing.

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

Amillimeter wave

Bmassive MIMO

Cvirtual

Dcopper wire

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'copper wire' which is unrelated to wireless 5G.

Selecting 'physical' instead of 'virtual' for network slicing.

5G uses millimeter wave frequency bands for high data rates, massive MIMO antenna technology to improve signal quality and capacity, and virtual network slicing to create multiple separate networks on the same infrastructure.

Practice

1. What is the main advantage of 5G over 4G in cellular networks?

easy

A. Faster speeds and lower delay

B. Longer battery life for devices

C. Better voice call quality only

D. Uses older technology standards

Solution

1. Step 1: Understand 4G and 5G basics

   4G provides fast internet and good connectivity for most uses.

2. Step 2: Compare 5G features

   5G improves speed significantly and reduces delay (latency), allowing more devices to connect smoothly.

3. Final Answer:

   Faster speeds and lower delay -> Option A

4. Quick Check:

   5G speed & latency = Faster and lower [OK]

Hint: 5G is about speed and delay, not just calls [OK]

Common Mistakes:

• Thinking 5G only improves call quality
• Confusing battery life improvements with network speed
• Assuming 5G uses older technology

2. Which of the following is the correct way to describe 4G technology?

easy

A. A wired internet connection

B. A type of computer processor

C. A wireless network technology for mobile devices

D. A software application for phones

Solution

1. Step 1: Identify 4G technology type

   4G is a wireless network technology that connects mobile devices to the internet.

2. Step 2: Eliminate incorrect options

   It is not wired, not a processor, and not software but a network standard.

3. Final Answer:

   A wireless network technology for mobile devices -> Option C

4. Quick Check:

   4G = Wireless network tech [OK]

Hint: 4G connects phones wirelessly, not wired [OK]

Common Mistakes:

• Confusing 4G with hardware components
• Thinking 4G is software
• Assuming 4G means wired internet

3. Consider this code snippet simulating network speed check:

network = "5G"
speed = 1000 if network == "5G" else 100
print(speed)

What will be the output?

medium

A. 100

B. 1000

C. network

D. Error

Solution

1. Step 1: Check the network variable value

   The variable network is set to "5G".

2. Step 2: Evaluate the conditional expression

   Since network == "5G" is true, speed is assigned 1000.

3. Final Answer:

   1000 -> Option B

4. Quick Check:

   network == "5G" -> speed = 1000 [OK]

Hint: Check condition true? Then speed = 1000 [OK]

Common Mistakes:

• Assuming speed is 100 by default
• Confusing variable names with output
• Expecting syntax error due to inline if

4. This code tries to print the network type but has an error:

network = 4G
print(network)

What is the error and how to fix it?

medium

A. No error, code runs fine

B. print() function is missing parentheses

C. Variable name 'network' is invalid

D. 4G should be in quotes to be a string

Solution

1. Step 1: Identify the error in variable assignment

   4G is not in quotes, so Python treats it as a variable, causing an error.

2. Step 2: Fix by adding quotes

   Put "4G" in quotes to make it a string: network = "4G".

3. Final Answer:

   4G should be in quotes to be a string -> Option D

4. Quick Check:

   Strings need quotes in Python [OK]

Hint: Strings must be in quotes to avoid errors [OK]

Common Mistakes:

• Forgetting quotes around text
• Thinking print() needs no parentheses
• Assuming variable names can't be 'network'

5. A city wants to upgrade its cellular network to support many smart devices with very low delay. Which technology should they choose and why?

hard

A. 5G, because it supports more devices and has lower latency

B. 4G, because it is widely available and fast enough

C. 3G, because it uses less power

D. Wi-Fi, because it covers large outdoor areas

Solution

1. Step 1: Understand the city's needs

   The city needs to support many smart devices with very low delay (latency).

2. Step 2: Compare network technologies

   4G is fast but 5G supports many more devices simultaneously and has much lower latency. 3G is outdated and Wi-Fi does not cover large outdoor areas well.

3. Final Answer:

   5G, because it supports more devices and has lower latency -> Option A

4. Quick Check:

   Many devices + low delay = 5G [OK]

Hint: More devices + low delay = choose 5G [OK]

Common Mistakes:

• Choosing 4G for large device support
• Confusing Wi-Fi coverage with cellular
• Picking older 3G technology