190+ PostgreSQL MCQ With Online Practice Test

PostgreSQL, often referred to as Postgres, is a powerful open-source relational database management system (RDBMS) known for its scalability, robustness, and extensibility. It offers advanced features like ACID compliance, support for complex data types, and support for both SQL and NoSQL data. PostgreSQL is highly regarded for its performance, security, and reliability, making it a popular choice for applications ranging from small startups to large enterprises. Its active developer community continuously enhances and maintains the software. PostgreSQL is an excellent choice for data storage, analysis, and management in various domains, including web applications, data warehousing, and geospatial applications.

Practice Test

121. What is the primary purpose of connection pooling in PostgreSQL?

Answer: To efficiently manage and reuse database connections

122. Which PostgreSQL extension provides a popular connection pooler for PostgreSQL databases?

Answer: "pgBouncer"

123. What is the benefit of connection pooling for PostgreSQL databases?

Answer: Reducing the number of connections to the database, which conserves resources

124. What happens when a client application connects to a PostgreSQL database using connection pooling?

Answer: The connection is borrowed from the pool, and after use, it is returned to the pool for reuse

125. Which of the following statements about connection pooling in PostgreSQL is true?

Answer: It helps manage and control concurrent connections more effectively

126. What is a common method for configuring connection pooling in PostgreSQL using "pgBouncer"?

Answer: Editing the "pgbouncer.ini" configuration file

127. What happens to a database connection when a client application disconnects from the database in a connection pool setup?

Answer: The connection is returned to the pool for reuse

128. What is the primary advantage of connection pooling in a multi-user PostgreSQL environment?

Answer: It helps manage and optimize the usage of limited database connections

129. What is the purpose of connection pool maintenance in PostgreSQL?

Answer: To monitor and manage the pool's connections, ensuring their availability and efficiency

130. In a connection pool setup, what is "idle timeout"?

Answer: The duration a connection can remain idle in the pool before it's closed
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