MySQL - Transactions and ACID properties MCQ

MySQL – Transactions and ACID properties MCQ

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1. What is the primary purpose of transactions in MySQL?

Data insertion

Data retrieval

Data analysis

Data integrity

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2. Which of the following represents the ACID properties of a transaction in a relational database?

CAID

ACID

ACDC

ADID

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3. In the context of transactions, what does the term “atomicity” refer to?

Ensuring data consistency

Treating a transaction as a single unit of work

Preventing data corruption

Managing concurrent transactions

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4. Which ACID property ensures that once a transaction is committed, its changes are permanent and will survive system failures?

Isolation

Durability

Consistency

Atomicity

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5. What is the primary role of the COMMIT statement in MySQL transactions?

To execute SQL statements

To roll back a transaction

To begin a transaction

To end a transaction

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6. Which ACID property guarantees that a transaction brings the database from one consistent state to another?

Atomicity

Durability

Isolation

Consistency

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7. What does the term “isolation level” refer to in the context of MySQL transactions?

The level of transaction complexity

The level of transaction visibility

The duration of a transaction

The level of transaction durability

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8. Which isolation level in MySQL allows transactions to read uncommitted changes made by other transactions?

SERIALIZABLE

REPEATABLE READ

READ UNCOMMITTED

READ COMMITTED

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9. What is the primary purpose of the ROLLBACK statement in MySQL transactions?

To undo a transaction

To save transaction changes

To execute SQL statements

To end a transaction

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10. Which ACID property ensures that concurrent transactions do not interfere with each other?

Consistency

Atomicity

Durability

Isolation

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11. What is the consequence of a transaction violating the consistency property in MySQL?

The transaction is made durable

The transaction is rolled back

The transaction is committed

The transaction is isolated from others

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12. How can transactions help maintain data integrity in a MySQL database?

By preventing concurrent access

By allowing unlimited concurrent access

By providing a unified view of data

By ensuring the execution of SQL statements

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13. What is the purpose of using explicit error handling mechanisms in MySQL transactions?

To optimize transaction performance

To improve data retrieval

To handle unexpected exceptions

To enforce consistency constraints

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14. Which isolation level in MySQL provides the highest level of isolation, preventing all types of conflicts with other transactions?

REPEATABLE READ

SERIALIZABLE

READ COMMITTED

READ UNCOMMITTED

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15. What is the role of the BEGIN statement in MySQL transaction management?

To roll back a transaction

To initiate a new transaction

To commit a transaction

To execute SQL statements

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16. What is the primary benefit of using the principle of least privilege when working with MySQL transactions?

Simplified error handling

Improved data durability

Enhanced transaction performance

Enhanced security

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17. Which MySQL function is used to begin a transaction explicitly?

SAVEPOINT

ROLLBACK

BEGIN

COMMIT

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18. How can transactions be optimized for performance in MySQL?

By extending transaction durations

By increasing isolation levels

By minimizing transaction duration

By using explicit error handling

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19. What is the primary purpose of the COMMIT statement in MySQL transactions?

To execute SQL statements

To begin a transaction

To save transaction changes

To end a transaction

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20. Which ACID property ensures that a transaction is treated as a single, indivisible unit of work?

Isolation

Atomicity

Durability

Consistency

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21. In MySQL, what is the primary purpose of the SAVEPOINT statement in transaction management?

To begin a new transaction

To commit a transaction

To mark a point within a transaction

To create a new database

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22. Which isolation level in MySQL allows transactions to read committed changes but prevents uncommitted changes from being read?

SERIALIZABLE

READ COMMITTED

REPEATABLE READ

READ UNCOMMITTED

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23. What is the primary role of the ROLLBACK TO statement in MySQL transactions?

To roll back to a specific savepoint

To begin a new transaction

To mark a point within a transaction

To commit a transaction

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24. Which best practice should be followed when working with transactions in MySQL?

Keep transactions long

Use transactions only when necessary

Minimize the use of explicit error handling

Set the highest isolation level for all transactions

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25. What is the primary purpose of using the ACID properties in MySQL transactions?

To ensure data accuracy and consistency

To optimize transaction performance

To improve data retrieval

To simplify error handling

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