- A
Export the database using mysqldump and import into Cloud SQL; change charset after import.
Why wrong: This approach requires downtime and does not handle MyISAM conversion automatically.
- B
Use DMS continuous migration directly; DMS automatically converts MyISAM to InnoDB and changes charset.
Why wrong: DMS does not automatically convert MyISAM to InnoDB or change charset; these must be done beforehand.
- C
Convert MyISAM to InnoDB, change charset to utf8mb4, then use DMS continuous migration.
Correct: MyISAM to InnoDB conversion, utf8mb4 for full Unicode, and DMS continuous migration for minimal downtime.
- D
Use DMS one-time migration, convert MyISAM to InnoDB during migration.
Why wrong: One-time migration requires downtime; also MyISAM conversion must be done before migration.
PCD Migrate Data Solutions Practice Question
This PCD practice question tests your understanding of migrate data solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An organization is migrating a 5 TB MySQL database from on-premises to Cloud SQL. The source uses MyISAM tables and the utf8 charset. The target must support full Unicode (emojis). The migration should have minimal downtime. What should the organization do?
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
Convert MyISAM to InnoDB, change charset to utf8mb4, then use DMS continuous migration.
Option C is correct because Cloud SQL requires InnoDB tables (MyISAM is not supported) and utf8mb4 charset for full Unicode support including emojis. By first converting the tables and charset on-premises, then using Database Migration Service (DMS) continuous migration, you achieve minimal downtime through ongoing replication.
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.
- ✗
Export the database using mysqldump and import into Cloud SQL; change charset after import.
Why it's wrong here
This approach requires downtime and does not handle MyISAM conversion automatically.
- ✗
Use DMS continuous migration directly; DMS automatically converts MyISAM to InnoDB and changes charset.
Why it's wrong here
DMS does not automatically convert MyISAM to InnoDB or change charset; these must be done beforehand.
- ✓
Convert MyISAM to InnoDB, change charset to utf8mb4, then use DMS continuous migration.
Why this is correct
Correct: MyISAM to InnoDB conversion, utf8mb4 for full Unicode, and DMS continuous migration for minimal downtime.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use DMS one-time migration, convert MyISAM to InnoDB during migration.
Why it's wrong here
One-time migration requires downtime; also MyISAM conversion must be done before migration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that DMS can automatically fix source incompatibilities like MyISAM tables or charset issues, when in reality the source must be pre-configured to match Cloud SQL requirements.
Detailed technical explanation
How to think about this question
MyISAM tables lack transaction support and row-level locking, which Cloud SQL (InnoDB-based) requires; converting to InnoDB ensures ACID compliance and online DDL. The utf8 charset in MySQL supports only up to 3-byte characters, while utf8mb4 (4-byte) covers supplementary characters like emojis. DMS continuous migration uses MySQL binlog-based replication to keep the target in sync with minimal downtime, but the source must already meet Cloud SQL's prerequisites.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
- →
Migrate Data Solutions — study guide chapter
Learn the concepts, then practise the questions
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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: Convert MyISAM to InnoDB, change charset to utf8mb4, then use DMS continuous migration. — Option C is correct because Cloud SQL requires InnoDB tables (MyISAM is not supported) and utf8mb4 charset for full Unicode support including emojis. By first converting the tables and charset on-premises, then using Database Migration Service (DMS) continuous migration, you achieve minimal downtime through ongoing replication.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
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.
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