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

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

2 / 20

Which fork is specific for unlogged tables?

3 / 20

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

4 / 20

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

5 / 20

Who is the Author of the Postgres 14 Internals book?

6 / 20

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

7 / 20

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

8 / 20

A schema can belong to more than one database?

9 / 20

pg_catalog schema is used to store system catalog tables?

10 / 20

Which of below are predefined schemas?

choose 3

11 / 20

Tablespaces are used to define physical data layout?

12 / 20

What is the process first launched at server start?

13 / 20

What is the purpose of wal writer?

14 / 20

Postgres server spawns a new backend session for each connection?

15 / 20

A single Postgres Instance can server only one database?

16 / 20

What is the purpose of the template0 database?

17 / 20

What is the purpose of autovacuum?

18 / 20

TOAST tables reside in a seperate schema?

19 / 20

Which fork contains the actual table data?

20 / 20

What command is used to create the Postgres cluster?

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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

A phantom read anomaly occurs when?

2 / 10

The SQL standard specifies three isolation levels?

3 / 10

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

4 / 10

Which of the below are valid Isolations Levels?

choose 2

5 / 10

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

6 / 10

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

7 / 10

What is the default Isolation Level?

8 / 10

Which parameters sets the database default isolation level?

9 / 10

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

10 / 10

Which of the below would best describe a dirty read?

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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

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

2 / 10

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

3 / 10

The page Special Space is located at the start of the page with highest address

4 / 10

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

5 / 10

Information about subtransactions is stored under?

6 / 10

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

7 / 10

CLOG contains how many bits for each transaction?

8 / 10

status of a subtransaction is written into CLOG?

9 / 10

at any one time Postgres can have several versions of a row?

10 / 10

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

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