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Migrate Data Solutions →mediumMultiple ChoiceObjective-mapped

PCD Migrate Data Solutions Practice Question

This PCD practice question tests your understanding of migrate data solutions. 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.

A company is using Database Migration Service to continuously migrate data from an on-premises PostgreSQL database to Cloud SQL for PostgreSQL. The source database is behind a firewall. Which two steps are required to establish connectivity? (Choose two.)

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

✓

Install Cloud SQL Auth Proxy on the source database server

Option A is correct because Cloud SQL Auth Proxy provides a secure way to connect to Cloud SQL from on-premises without requiring a public IP or firewall rules for the Cloud SQL instance. It uses a TLS tunnel to the Cloud SQL instance, which is ideal when the source database is behind a firewall and you need to establish outbound connectivity from the on-premises environment to Cloud SQL. This avoids exposing the Cloud SQL instance to the public internet. Option D is correct because VPC peering allows the customer's VPC to communicate with the Cloud SQL VPC privately, enabling Database Migration Service to access the Cloud SQL instance without traversing the public internet. This is a common configuration when using private IP for Cloud SQL.

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.

  • ✓

    Install Cloud SQL Auth Proxy on the source database server

    Why this is correct

    Auth Proxy creates an encrypted tunnel for DMS to connect to the source.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Open firewall ports for DMS public IPs

    Why it's wrong here

    DMS does not use public IPs for connectivity.

  • ✗

    Use Cloud Interconnect

    Why it's wrong here

    Cloud Interconnect is a dedicated connection, not required for DMS.

  • ✓

    Set up VPC peering between the customer's VPC and the Cloud SQL VPC

    Why this is correct

    VPC peering allows connectivity if the source is accessible via a VPC.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Configure a Cloud VPN tunnel to the source database

    Why it's wrong here

    Cloud VPN is not directly supported by DMS for connectivity.

Common exam traps

Common exam trap: answer the scenario, not the keyword

A common pitfall is thinking that DMS requires opening firewall ports for its public IPs or that a VPN tunnel is mandatory, when in fact Cloud SQL Auth Proxy or VPC peering are the correct connectivity methods for Google Cloud.

Detailed technical explanation

How to think about this question

Database Migration Service (DMS) uses a continuous migration approach by reading the PostgreSQL write-ahead log (WAL) from the source database. To establish connectivity, DMS requires either a Cloud SQL Auth Proxy (which creates an outbound TLS connection from the source to Cloud SQL) or a private IP connection via VPC peering (which requires the source to be in a network that can reach the Cloud SQL private IP). The Auth Proxy handles authentication and encryption, while VPC peering provides low-latency private connectivity without traversing the public internet.

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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

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 PCD question test?

Migrate Data Solutions — This question tests Migrate Data Solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Install Cloud SQL Auth Proxy on the source database server — Option A is correct because Cloud SQL Auth Proxy provides a secure way to connect to Cloud SQL from on-premises without requiring a public IP or firewall rules for the Cloud SQL instance. It uses a TLS tunnel to the Cloud SQL instance, which is ideal when the source database is behind a firewall and you need to establish outbound connectivity from the on-premises environment to Cloud SQL. This avoids exposing the Cloud SQL instance to the public internet. Option D is correct because VPC peering allows the customer's VPC to communicate with the Cloud SQL VPC privately, enabling Database Migration Service to access the Cloud SQL instance without traversing the public internet. This is a common configuration when using private IP for Cloud SQL.

What should I do if I get this PCD 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.

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Last reviewed: Jul 4, 2026

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This PCD 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 PCD exam.