Machine types and families (E2, N2, C2) in GCP - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding the main difference between E2 and N2 machine families

Which statement best describes the key difference between E2 and N2 machine types in Google Cloud Platform?

A E2 machines use custom CPUs optimized for cost efficiency, while N2 machines use newer Intel or AMD processors for better performance.

B E2 machines are designed for high-performance computing with GPUs, while N2 machines are only for general workloads without GPUs.

C E2 machines support only fixed machine types, while N2 machines support only custom machine types.

D E2 machines are only available in specific regions, while N2 machines are available globally.

💡 Hint

Think about the CPU types and cost-performance trade-offs between these families.

E2 machine types use cost-optimized CPUs and are designed for general workloads with good price-performance balance. N2 machines use newer Intel or AMD processors offering better performance for more demanding workloads.

❓ Architecture

intermediate

Choosing the right machine family for a CPU-intensive workload

You have a CPU-intensive application that requires consistent high performance. Which machine family should you choose to optimize performance without GPUs?

A C2 family, because it is designed for cost savings on general workloads.

B E2 family, because it offers the best CPU performance for intensive workloads.

C N2 family, because it uses newer Intel or AMD processors optimized for performance.

D E2 family, because it supports the highest number of vCPUs per instance.

💡 Hint

Consider which family uses the latest processors for CPU-intensive tasks.

N2 machines use newer Intel or AMD processors that provide better CPU performance for demanding workloads compared to E2 or C2.

❓ service_behavior

advanced

Behavior of C2 machine family under burst CPU load

What happens when a C2 machine type instance experiences a sudden burst of CPU load beyond its baseline capacity?

A The instance automatically scales up to more vCPUs to handle the burst without performance degradation.

B The instance throttles CPU usage to stay within its allocated capacity, potentially reducing performance temporarily.

C The instance switches to a lower-cost CPU mode to save money during the burst.

D The instance shuts down automatically to prevent overheating.

💡 Hint

Think about how fixed CPU capacity machines handle sudden load spikes.

C2 machines have fixed CPU capacity and do not auto-scale. Under burst load, they throttle CPU usage to stay within limits, which can reduce performance temporarily.

❓ security

advanced

Security implications of using E2 vs N2 machine types

Which security feature is uniquely available or enhanced in N2 machine types compared to E2 in Google Cloud Platform?

A N2 machines support Confidential Computing with AMD SEV, which is not available on E2 machines.

B E2 machines have built-in hardware encryption, but N2 machines rely only on software encryption.

C E2 machines automatically isolate network traffic at the hardware level, unlike N2 machines.

D N2 machines support Shielded VMs with advanced firmware security features, while E2 machines do not.

💡 Hint

Consider which machine family supports Confidential Computing features.

N2 machines support Confidential Computing using AMD SEV technology, providing enhanced memory encryption. E2 machines do not support this feature.

✅ Best Practice

expert

Optimizing cost and performance with mixed machine families

You need to deploy a scalable web application with variable workloads. Which strategy best balances cost and performance using E2, N2, and C2 machine types?

A Use N2 machines exclusively to simplify management and maximize performance regardless of cost.

B Use E2 machines for CPU-intensive tasks, N2 machines for memory-intensive tasks, and C2 machines for GPU workloads.

C Use only C2 machines for all workloads because they offer the best cost savings and performance balance.

D Use E2 machines for baseline workloads to save cost, N2 machines for moderate traffic spikes, and C2 machines for short CPU-intensive batch jobs.

💡 Hint

Think about matching machine types to workload characteristics and cost efficiency.

E2 machines are cost-effective for steady baseline workloads. N2 machines handle moderate spikes with better performance. C2 machines are optimized for short, CPU-heavy tasks. Combining them balances cost and performance.

Practice

1. Which Google Cloud machine family is best suited for cost-effective general use workloads?

easy

A. E2 family

B. N2 family

C. C2 family

D. M1 family

Solution

1. Step 1: Understand the purpose of each machine family

   The E2 family is designed for cost-effective general use, N2 balances power and memory, and C2 is optimized for CPU-heavy tasks.

2. Step 2: Match the workload type to the machine family

   Since the question asks for cost-effective general use, E2 is the best fit.

3. Final Answer:

   E2 family -> Option A

4. Quick Check:

   Cost-effective general use = E2 [OK]

Hint: E2 means economical general use machines [OK]

Common Mistakes:

• Confusing C2 as cost-effective instead of CPU-optimized
• Choosing N2 for cost savings instead of balance
• Selecting a non-existent machine family like M1

2. Which of the following is the correct way to specify a C2 machine type in a Google Cloud VM instance configuration?

easy

A. machineType: 'zones/us-central1-a/machineTypes/m1-standard-4'

B. machineType: 'zones/us-central1-a/machineTypes/e2-standard-4'

C. machineType: 'zones/us-central1-a/machineTypes/n2-standard-4'

D. machineType: 'zones/us-central1-a/machineTypes/c2-standard-4'

Solution

1. Step 1: Identify the correct machine family prefix for C2

   C2 machine types start with 'c2-', so the machine type string must include 'c2-standard-4'.

2. Step 2: Verify the full machineType format

   The format is 'zones/{zone}/machineTypes/{machineType}', so 'zones/us-central1-a/machineTypes/c2-standard-4' is correct.

3. Final Answer:

   machineType: 'zones/us-central1-a/machineTypes/c2-standard-4' -> Option D

4. Quick Check:

   C2 machine type string includes 'c2-' prefix [OK]

Hint: C2 machine types start with 'c2-' in the path [OK]

Common Mistakes:

• Using 'e2-' or 'n2-' prefix for C2 machines
• Incorrect zone or path format
• Using a non-existent machine family like 'm1-'

3. You launch a VM with machine type n2-standard-8. Which statement best describes this VM's characteristics?

medium

A. It is optimized for CPU-heavy workloads with 8 vCPUs.

B. It balances CPU and memory with 8 vCPUs and moderate RAM.

C. It is a cost-effective VM with limited CPU power.

D. It is a high-memory VM with 8 vCPUs and extra RAM.

Solution

1. Step 1: Understand the N2 machine family purpose

   N2 machines balance CPU power and memory, suitable for general workloads needing moderate resources.

2. Step 2: Analyze the machine type suffix

   'standard-8' means 8 virtual CPUs with balanced memory, not specialized for CPU-only or high-memory.

3. Final Answer:

   It balances CPU and memory with 8 vCPUs and moderate RAM. -> Option B

4. Quick Check:

   N2 = balanced CPU and memory [OK]

Hint: N2 means balanced CPU and memory machines [OK]

Common Mistakes:

• Confusing N2 with C2 which is CPU-optimized
• Thinking N2 is cost-effective like E2
• Assuming N2 is high-memory only

4. A user tries to create a VM with machine type c2-standard-16 but gets an error. Which is the most likely cause?

medium

A. The zone does not support C2 machine types with 16 vCPUs.

B. The machine type name is misspelled; it should be c2-standrd-16.

C. C2 machines cannot have more than 8 vCPUs.

D. The user must specify the machine type without the zone prefix.

Solution

1. Step 1: Check machine type naming and limits

   'c2-standard-16' is a valid machine type with 16 vCPUs; spelling is correct and allowed size.

2. Step 2: Consider zone availability

   Some zones do not support all machine types or sizes, so the error likely comes from zone limitations.

3. Final Answer:

   The zone does not support C2 machine types with 16 vCPUs. -> Option A

4. Quick Check:

   Zone support limits cause machine type errors [OK]

Hint: Check zone supports machine type size before creating VM [OK]

Common Mistakes:

• Assuming spelling error when name is correct
• Believing C2 max vCPUs is 8 (it's higher)
• Ignoring zone prefix requirement in machineType

5. You need to run a CPU-intensive data processing job that requires maximum CPU power but moderate memory. Which machine type should you choose to optimize performance and cost?

hard

A. e2-standard-16

B. n2-highmem-16

C. c2-standard-16

D. e2-highcpu-16

Solution

1. Step 1: Identify workload requirements

   The job is CPU-intensive needing maximum CPU power with moderate memory.

2. Step 2: Match machine family to workload

   C2 family is optimized for CPU-heavy workloads, while E2 is cost-effective general use and N2-highmem is for memory-heavy tasks.

3. Step 3: Choose the best machine type

   Among options, 'c2-standard-16' provides high CPU power with balanced memory, fitting the requirement best.

4. Final Answer:

   c2-standard-16 -> Option C

5. Quick Check:

   CPU-heavy job = C2 machines [OK]

Hint: Use C2 for CPU-heavy jobs, not E2 or N2-highmem [OK]

Common Mistakes:

• Choosing E2 for CPU-heavy instead of cost-effective use
• Picking N2-highmem which wastes cost on extra memory
• Selecting E2-highcpu which is less powerful than C2