Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

You will need to score 80% or over to pass!

Created by Paul Sammy

PostgreSQL 14 Internals Chapter 1

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 1.

1 / 20

1. What is the point of the pg_global tablespace?

2 / 20

2. What command is used to create the Postgres cluster?

3 / 20

3. Which 3 databases exist directly after cluster initialization?

choose 3 options

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4. Which fork contains the actual table data?

5 / 20

5. What column in system catalogs servers as the Primary Key

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6. System Catalog tables begin with which prefix?

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7. What is the name of the mechanism used to store a row bigger than a page size?

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8. It is the postmasters job to listener for incoming connections?

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9. What is the purpose of the public schema?

10 / 20

10. Each Database has its own System Catalog?

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11. Which fork keeps track of available space within pages?

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12. A single Postgres Instance can server only one database?

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13. The pg_default tablespace should never be used to create user tables?

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14. Tablespaces are used to define physical data layout?

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15. Some System Catalog tables are common to all databases in the cluster?

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16. A schema can belong to more than one database?

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17. What is the name of the 2 default tablespaces created after initialization?

choose 2

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18. Which of below are predefined schemas?

choose 2

19 / 20

19. The default Page size is 2k?

20 / 20

20. Which of the below objects can be referred to as relations?

choose 3

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Created by Paul Sammy

PostgreSQL 14 Internals Chapter 2

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 2.

1 / 10

1. Which of the below would best describe a dirty read?

2 / 10

2. The more locks a transaction acquires, the better it is isolated from other transactions?

3 / 10

3. At any moment the database system can contain several versions of one and the same row?

4 / 10

4. which of the below statements will start a transaction as Read Repeatable?

5 / 10

5. Lost updates are forbidden by the standard at all isolation levels?

6 / 10

6. Based on Snapshot Isolation use of MVCC which of the below are permitted?

choose 3

7 / 10

7. Which parameters sets the database default isolation level?

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8. The SQL standard specifies three isolation levels?

9 / 10

9. What are some of database features we can use to avoid a non repeatable read?

Select more than 1 answer below:

10 / 10

10. Which isolation level in theory could mean an application does not have to consider isolation anomalies?

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Created by Paul Sammy

PostgreSQL 14 Internals Chapter 3

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 3.

1 / 10

1. virtual IDs exist only in PGDATA/pg_vxid when not cached?

2 / 10

2. indexes do not use row versioning?

3 / 10

3. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

4 / 10

4. Page free space can often become fragmented?

5 / 10

5. The page header stores checksum and the sizes of the other parts of the page?

6 / 10

6. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

7 / 10

7. a transaction containing a savepoint is will still be considered as only a single transaction?

8 / 10

8. If a transaction is read only which kind of Transaction ID is it allocated?

9 / 10

9. CLOG contains how many bits for each transaction?

10 / 10

10. Which 2 items does a Virtual XID consist of?

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