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

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

2 / 20

Users should not modify the template0 database

3 / 20

Which of below are predefined schemas?

choose 3

4 / 20

What column in system catalogs servers as the Primary Key

5 / 20

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

6 / 20

Postgres by default has built in connection pooling abilities?

7 / 20

What is the purpose of autovacuum?

8 / 20

What is the default standard size for a fork file?

9 / 20

What is another name for the postgres process?

10 / 20

What command is used to create the Postgres cluster?

11 / 20

Postgres server spawns a new backend session for each connection?

12 / 20

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

13 / 20

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

14 / 20

Each Database has its own System Catalog?

15 / 20

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

16 / 20

What is a schema?

17 / 20

pg_catalog schema is used to store system catalog tables?

18 / 20

TOAST tables reside in a seperate schema?

19 / 20

Which fork contains the actual table data?

20 / 20

What is the purpose of wal writer?

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0%

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

Which of the below are valid Isolations Levels?

choose 2

2 / 10

Which of the below would best describe a dirty read?

3 / 10

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

4 / 10

Which parameters sets the database default isolation level?

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

choose 3

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0%

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

Each page has a layer that usually consists of?

choose 2

2 / 10

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

3 / 10

CLOG files are stored in which directory?

4 / 10

CLOG contains how many bits for each transaction?

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

indexes do not use row versioning?

10 / 10

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

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