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

If we create a new tablespace which directory will symbolic links be created from?

2 / 20

Which of below are predefined schemas?

choose 2

3 / 20

Which of below are predefined schemas?

choose 3

4 / 20

What command is used to create the Postgres cluster?

5 / 20

To understand each other, a client and a server must use one and the same interfacing protocol?

6 / 20

TOAST tables reside in a seperate schema?

7 / 20

What 3 files/forks as a minimum make up a table on disk?

8 / 20

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

9 / 20

What is the purpose of wal writer?

10 / 20

When PostgreSQL is running what can it be referred to as?

Choose 2 option

11 / 20

To be able to restore data consistency, Postgres maintains

12 / 20

Users should not modify the template0 database

13 / 20

Each tablespaces can only be assigned for use by one database

14 / 20

Files are logically split into pages?

15 / 20

What is the process first launched at server start?

16 / 20

Tablespaces are used to define physical data layout?

17 / 20

What is the purpose of the template1 database?

18 / 20

Postgres server spawns a new backend session for each connection?

19 / 20

What is the purpose of the visibility map?

20 / 20

What is the name of the catalog that stores metadata for all cluster objects?

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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

Snapshot isolation is preferred but increases the number of required locks?

2 / 10

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

3 / 10

Which parameters sets the database default isolation level?

4 / 10

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

Select more than 1 answer below:

5 / 10

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

choose 3

6 / 10

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

7 / 10

The SQL standard specifies three isolation levels?

8 / 10

Data Consistency is best handled at the application layer rather than at the database layer?

9 / 10

Which of the below are valid Isolations Levels?

choose 2

10 / 10

A phantom read anomaly occurs when?

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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

When a transaction is committed Postgres uses a special <replace with answer> structure?

2 / 10

CLOG contains how many bits for each transaction?

3 / 10

Which 2 of the below represent transaction IDs used for row versioning?

4 / 10

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

5 / 10

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

6 / 10

Rows of TOAST tables are handled in such a way that they are never update?

7 / 10

When a row is created, its xmin value is set to the transaction ID of which command?

8 / 10

Postgres table physical data files are always cross compatible across platforms?

9 / 10

If a transaction aborts, all page changes are reverted(rolled back) in place?

10 / 10

Which function can we use to find the current transaction ID?

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