1Z0-922 MySQL Implementation Associate Practice Questions
Prepare for 1Z0-922 with more than an answer.
- Time limit
- 90 minutes
- Questions on the exam
- 50
- Passing score
- 60%
- Level
- Associate
Domains covered on the exam 10
- Introduction to MySQL Enterprise Edition10%
- MySQL Installation and Architecture10%
- Designing Databases10%
- Implementing MySQL Security10%
- Using MySQL Enterprise Security Tools10%
- Backing Up MySQL10%
- Implementing MySQL Replication10%
- Enabling MySQL High Availability10%
- Monitoring MySQL10%
- Using HeatWave cluster10%
- 1
A developer is designing a table to store event logs for a globally distributed application. The application requires the exact time an event occurred to be recorded, and it must automatically adjust to the time zone of the connecting client when queried. Which MySQL data type should be used for this column?
Show answer details
Correct answer: B
The TIMESTAMP data type automatically converts values from the current time zone to UTC for storage, and back from UTC to the current time zone for retrieval. DATETIME does not perform any time zone conversions; it stores the literal value exactly as provided.
- 2
When designing an InnoDB table, understanding how indexes are structured is critical for query optimization. Which TWO of the following statements are correct regarding InnoDB indexes? (Select TWO)
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Correct answer: A, C
In InnoDB, the primary key acts as a clustered index, meaning the actual row data is stored in the leaf nodes of the primary key's B-tree. Secondary indexes do not contain the full row data; instead, their leaf nodes contain the primary key value, which is used to look up the row in the clustered index.
In InnoDB, the primary key acts as a clustered index, meaning the actual row data is stored in the leaf nodes of the primary key's B-tree. Secondary indexes do not contain the full row data; instead, their leaf nodes contain the primary key value, which is used to look up the row in the clustered index.
- 3
A database developer is analyzing a slow-performing query that joins three large tables. The
EXPLAINoutput reveals that one of the derived tables showsUsing filesortin the Extra column. What does this indicate about the query execution?Show answer details
Correct answer: B
Using filesortindicates that MySQL must perform an additional sorting phase to satisfy anORDER BYorGROUP BYclause, because it could not utilize an existing index to retrieve the rows in sorted order. Despite the name, "filesort" often happens entirely in memory (using the sort buffer) and does not strictly mean disk I/O is occurring, though it is a performance overhead. - 4
You have a
customerstable and anorderstable. You need to write a query that returns a list of ALL customers, including those who have never placed an order.Which type of JOIN is required to accomplish this?
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Correct answer: B
A LEFT JOIN returns all records from the left table (customers), and the matched records from the right table (orders). If a customer has no orders, the result will contain NULL values for the order columns, ensuring the customer is still included in the final output.
flowchart LR C[customers table] --> |LEFT JOIN| O[orders table] note[Returns ALL customers, even those without matching orders] - 5
A database architect is evaluating whether to upgrade an open-source database environment to MySQL Enterprise Edition. Which of the following features is exclusively available in the Enterprise Edition and NOT in the Community Edition?
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Correct answer: B
The Thread Pool Plugin is an exclusive feature of MySQL Enterprise Edition designed to improve performance and scalability by managing the number of concurrent threads executing queries. InnoDB, Group Replication, and the JSON data type are available in both Community and Enterprise editions.
- 6
While planning a deployment for a highly regulated financial institution, a security consultant must select tools to meet strict compliance requirements. Which TWO of the following are components of the MySQL Enterprise product suite? (Select TWO)
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Correct answer: A, C
MySQL Enterprise Audit is a commercial extension that provides policy-based auditing compliance. MySQL Enterprise Backup is also an enterprise-only tool for hot physical backups. MySQL Shell, MySQL Router, and MySQL Workbench (Community Edition) are available in the open-source Community tier.
MySQL Enterprise Backup is a commercial extension that provides policy-based auditing compliance. MySQL Enterprise Backup is also an enterprise-only tool for hot physical backups. MySQL Shell, MySQL Router, and MySQL Workbench (Community Edition) are available in the open-source Community tier.
