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

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

2 / 20

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

3 / 20

What is the purpose of the public schema?

4 / 20

What is the purpose of autovacuum?

5 / 20

Tablespaces are used to define physical data layout?

6 / 20

What is the purpose of the template1 database?

7 / 20

Postgres by default has built in connection pooling abilities?

8 / 20

Which fork contains the actual table data?

9 / 20

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

10 / 20

What is the name of the mechanism used to store a row bigger than a page size?

11 / 20

The information_schema schema provides information on Postgres release notes?

12 / 20

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

13 / 20

What is the purpose of the visibility map?

14 / 20

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

15 / 20

pg_catalog schema is used to store system catalog tables?

16 / 20

To be able to restore data consistency, Postgres maintains

17 / 20

Which of below are predefined schemas?

choose 3

18 / 20

System Catalog tables begin with which prefix?

19 / 20

What is the purpose of the postgres database?

20 / 20

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

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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

The SQL standard specifies three isolation levels?

3 / 10

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

4 / 10

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

5 / 10

Which of the below are valid Isolations Levels?

choose 2

6 / 10

Which parameters sets the database default isolation level?

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

choose 3

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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

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

Information about subtransactions is stored under?

6 / 10

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

7 / 10

Which of the below are true about a Pages Item Pointer?

8 / 10

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

9 / 10

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

10 / 10

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

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