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Plan and manage database infrastructure →hardMultiple ChoiceObjective-mapped

PCDE Plan and manage database infrastructure Practice Question

Q: How is Plan and manage database infrastructure tested on the PCDE exam?

Plan and manage database infrastructure — This question tests Plan and manage database infrastructure — Read the scenario before looking for a memorised answer..

Q: What is the correct answer to this Plan and manage database infrastructure PCDE question?

The correct answer is: Add a new cluster in a European region (e.g., europe-west1). — Adding a new cluster in a European region (e.g., europe-west1) is correct because it places data physically closer to users, reducing network latency for read operations. In a multi-region deployment, the application can read from the nearest cluster, achieving low-latency reads without changing the existing cluster's configuration. This approach leverages geographic proximity to minimize round-trip time (RTT) for European users.

Q: Why do candidates get Plan and manage database infrastructure questions wrong on the PCDE exam?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

This PCDE practice question tests your understanding of plan and manage database infrastructure. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

gcloud bigtable instances describe my-instance --format=json
Output:
{
  "instanceType": "PRODUCTION",
  "clusters": [
    {
      "id": "cluster-a",
      "zone": "us-central1-a",
      "serveNodes": 3,
      "defaultStorageType": "HDD",
      "location": "us-central1-a"
    }
  ]
}

Refer to the exhibit. The application requires low-latency reads for users in Europe. The current cluster is in us-central1. What should they do?

Question 1hardmultiple choice

Full question →

Exhibit

gcloud bigtable instances describe my-instance --format=json
Output:
{
  "instanceType": "PRODUCTION",
  "clusters": [
    {
      "id": "cluster-a",
      "zone": "us-central1-a",
      "serveNodes": 3,
      "defaultStorageType": "HDD",
      "location": "us-central1-a"
    }
  ]
}

A
Add a new cluster in a European region (e.g., europe-west1).
Adding a cluster in Europe allows reads to be served from a nearby location, reducing latency.
B
Increase the number of nodes in the existing cluster.
Why wrong: More nodes improve throughput but not latency across continents.
C
Use a multi-cluster instance with existing cluster.
Why wrong: The instance is already multi-cluster capable but only one cluster exists; adding a second cluster in Europe is needed.
D
Change the storage type to SSD in the existing cluster.
Why wrong: SSD will improve latency, but the users are in Europe; geographical distance remains a factor.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Add a new cluster in a European region (e.g., europe-west1).

Adding a new cluster in a European region (e.g., europe-west1) is correct because it places data physically closer to users, reducing network latency for read operations. In a multi-region deployment, the application can read from the nearest cluster, achieving low-latency reads without changing the existing cluster's configuration. This approach leverages geographic proximity to minimize round-trip time (RTT) for European users.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Add a new cluster in a European region (e.g., europe-west1).
Why this is correct
Adding a cluster in Europe allows reads to be served from a nearby location, reducing latency.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the number of nodes in the existing cluster.
Why it's wrong here
More nodes improve throughput but not latency across continents.
✗
Use a multi-cluster instance with existing cluster.
Why it's wrong here
The instance is already multi-cluster capable but only one cluster exists; adding a second cluster in Europe is needed.
✗
Change the storage type to SSD in the existing cluster.
Why it's wrong here
SSD will improve latency, but the users are in Europe; geographical distance remains a factor.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Google Cloud often tests the misconception that scaling up (more nodes or faster storage) can solve geographic latency issues, when in fact only adding a regional cluster addresses the fundamental physics of network propagation delay.

Detailed technical explanation

How to think about this question

In distributed databases like Cloud Spanner or CockroachDB, read latency is heavily influenced by the physical distance between the client and the serving node due to the speed of light (approximately 200 km/ms in fiber). Adding a cluster in europe-west1 allows reads to be served from that region, reducing RTT from ~100 ms (transatlantic) to <10 ms. This is achieved through multi-region configurations that use synchronous replication for writes but allow local reads via follower reads or leaseholder placement, depending on the database engine.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this PCDE question test?

Plan and manage database infrastructure — This question tests Plan and manage database infrastructure — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Add a new cluster in a European region (e.g., europe-west1). — Adding a new cluster in a European region (e.g., europe-west1) is correct because it places data physically closer to users, reducing network latency for read operations. In a multi-region deployment, the application can read from the nearest cluster, achieving low-latency reads without changing the existing cluster's configuration. This approach leverages geographic proximity to minimize round-trip time (RTT) for European users.

What should I do if I get this PCDE question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

About these practice questions

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Last reviewed: Jun 30, 2026

Question Discussion

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This PCDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCDE exam.