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

What is the default standard size for a fork file?

2 / 20

What is the name of the 2 default tablespaces created after initialization?

choose 2

3 / 20

A schema can belong to more than one database?

4 / 20

What is another name for the postgres process?

5 / 20

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

6 / 20

A single Postgres Instance can server only one database?

7 / 20

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

8 / 20

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

9 / 20

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

10 / 20

Each Database has its own System Catalog?

11 / 20

Which fork keeps track of available space within pages?

12 / 20

What is the process first launched at server start?

13 / 20

What is the point of the pg_global tablespace?

14 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

15 / 20

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

16 / 20

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

17 / 20

Tablespaces are used to define physical data layout?

18 / 20

What is the purpose of wal writer?

19 / 20

It is the postmasters job to listener for incoming connections?

20 / 20

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

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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

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

3 / 10

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

Select more than 1 answer below:

4 / 10

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

5 / 10

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

6 / 10

The SQL standard specifies three isolation levels?

7 / 10

Which parameters sets the database default isolation level?

8 / 10

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

9 / 10

What is the default Isolation Level?

10 / 10

A phantom read anomaly occurs when?

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

2 / 10

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

3 / 10

When a row is created, its xmin value is set to the transaction ID of which command?

4 / 10

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

5 / 10

Page free space can often become fragmented?

6 / 10

Tuples can also be referred to as columns?

7 / 10

UPDATE can be regarded as which 2 separate operations?

8 / 10

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

9 / 10

Each page has a layer that usually consists of?

choose 2

10 / 10

The page header is located in the highest address?

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