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

Postgres by default has built in connection pooling abilities?

2 / 20

Who is the Author of the Postgres 14 Internals book?

3 / 20

Each tablespaces can only be assigned for use by one database

4 / 20

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

5 / 20

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

6 / 20

Files are logically split into pages?

7 / 20

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

8 / 20

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

9 / 20

What column in system catalogs servers as the Primary Key

10 / 20

What is the name of the directory that contains the files related to the Postgres cluster?

11 / 20

What is the purpose of autovacuum?

12 / 20

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

13 / 20

What is the purpose of the template0 database?

14 / 20

What is the default standard size for a fork file?

15 / 20

TOAST tables reside in a seperate schema?

16 / 20

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

17 / 20

Postgres uses a thread based process model?

18 / 20

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

19 / 20

What is the purpose of wal writer?

20 / 20

System Catalog tables begin with which prefix?

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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

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

Select more than 1 answer below:

2 / 10

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

choose 3

3 / 10

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

4 / 10

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

5 / 10

What is the default Isolation Level?

6 / 10

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

7 / 10

Which of the below would best describe a dirty read?

8 / 10

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

9 / 10

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

10 / 10

The SQL standard specifies three isolation levels?

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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

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

2 / 10

The page header is located in the highest address?

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

indexes do not use row versioning?

7 / 10

Indexes values also support multi versioning with several versions of an index value existing at any point in time?

8 / 10

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

9 / 10

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

10 / 10

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

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