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 a schema?

2 / 20

Which fork keeps track of available space within pages?

3 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

4 / 20

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

5 / 20

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

6 / 20

What is the name of the system catalog table for relations?

7 / 20

Which of the below objects can be referred to as relations?

choose 3

8 / 20

The information_schema schema provides information on Postgres release notes?

9 / 20

What column in system catalogs servers as the Primary Key

10 / 20

Each tablespaces can only be assigned for use by one database

11 / 20

What is the purpose of autovacuum?

12 / 20

pg_catalog schema is used to store system catalog tables?

13 / 20

Postgres by default has built in connection pooling abilities?

14 / 20

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

15 / 20

A single Postgres Instance can server only one database?

16 / 20

Postgres uses a thread based process model?

17 / 20

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

18 / 20

TOAST tables reside in a seperate schema?

19 / 20

Which of below are predefined schemas?

choose 2

20 / 20

What is the purpose of the template1 database?

Your score is

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

2 / 10

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

Select more than 1 answer below:

3 / 10

The SQL standard specifies three isolation levels?

4 / 10

Which of the below would best describe a dirty read?

5 / 10

Which of the below are valid Isolations Levels?

choose 2

6 / 10

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

7 / 10

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

choose 3

8 / 10

A phantom read anomaly occurs when?

9 / 10

Which parameters sets the database default isolation level?

10 / 10

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

Your score is

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

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

2 / 10

status of a subtransaction is written into CLOG?

3 / 10

The page header is located in the highest address?

4 / 10

Page header sizes can be easily displayed using the <choose from answers> extension

5 / 10

CLOG files are stored in which directory?

6 / 10

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

7 / 10

indexes do not use row versioning?

8 / 10

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

9 / 10

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

10 / 10

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

Your score is

0%