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

The information_schema schema provides information on Postgres release notes?

2 / 20

Who is the Author of the Postgres 14 Internals book?

3 / 20

Which of below are predefined schemas?

choose 2

4 / 20

Tablespaces can be used to segregate data based on performance needs?

5 / 20

Which fork contains the actual table data?

6 / 20

What is the purpose of wal writer?

7 / 20

Each tablespaces can only be assigned for use by one database

8 / 20

What command is used to create the Postgres cluster?

9 / 20

pg_catalog schema is used to store system catalog tables?

10 / 20

Each Database has its own System Catalog?

11 / 20

How many files or forks on disk will a 10Mb table with no index have?

12 / 20

What is the name of the system catalog table for relations?

13 / 20

Which fork is specific for unlogged tables?

14 / 20

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

15 / 20

Postgres server spawns a new backend session for each connection?

16 / 20

Tablespaces are used to define physical data layout?

17 / 20

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

18 / 20

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

19 / 20

How does Postgres know which schema to use if not specified?

20 / 20

What is the purpose of the visibility map?

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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

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

2 / 10

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

3 / 10

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

4 / 10

A phantom read anomaly occurs when?

5 / 10

What is the default Isolation Level?

6 / 10

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

7 / 10

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

8 / 10

The SQL standard specifies three isolation levels?

9 / 10

What is the acronym used for the attributes that ensure Data consistency, integrity and durability?

10 / 10

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

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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

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

2 / 10

psql provides a special mode that allows you to continue a transaction after a failure?

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

7 / 10

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

8 / 10

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

9 / 10

CLOG Pages are never cached in memory?

10 / 10

In Postgres, tables are often referred to as which of the below?

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