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 pg_default tablespace should never be used to create user tables?

2 / 20

What is the purpose of the template0 database?

3 / 20

A Postgres cluster consists of 2 or more physical servers accessing one Postgres Instance?

4 / 20

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

Choose 2 option

5 / 20

It is the postmasters job to listener for incoming connections?

6 / 20

The information_schema schema provides information on Postgres release notes?

7 / 20

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

8 / 20

Tablespaces are used to define physical data layout?

9 / 20

What is the purpose of the postgres database?

10 / 20

A schema can belong to more than one database?

11 / 20

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

12 / 20

What is the purpose of autovacuum?

13 / 20

Users should not modify the template0 database

14 / 20

The default Page size is 2k?

15 / 20

Which of below are predefined schemas?

choose 2

16 / 20

How many rows in a page does Postgres aim to have before considering TOAST?

17 / 20

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

18 / 20

What column in system catalogs servers as the Primary Key

19 / 20

Which fork is specific for unlogged tables?

20 / 20

Each tablespaces can only be assigned for use by one database

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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

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

2 / 10

The SQL standard specifies three isolation levels?

3 / 10

non-repeatable read anomaly occurs when?

4 / 10

What is the default Isolation Level?

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

A phantom read anomaly occurs when?

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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

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

2 / 10

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

3 / 10

UPDATE can be regarded as which 2 separate operations?

4 / 10

Information about subtransactions is stored under?

5 / 10

status of a subtransaction is written into CLOG?

6 / 10

Which 2 items does a Virtual XID consist of?

7 / 10

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

8 / 10

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

9 / 10

Each page has a layer that usually consists of?

choose 2

10 / 10

index row headers like table row headers contain xmin and xmax fields?

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