Multiple Data Sources — Spring Technical Interview Questions & Answers

Configuring and routing between two databases.

Multiple Data Sources

  • Multiple Data Sources (sb db datasources) is a Spring topic. In plain words you use it for a short Multiple Data Sources sb db datasources example in a small REST app. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Multiple Data Sources sb db datasources example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Multiple Data Sources (sb db datasources).
  • From the example next to this theory: Configuring and routing between two databases.
  • Trap: only saying “Multiple Data Sources sb db datasources” with no example. Fix that before you talk about advanced Spring.
  • Viva: what is Multiple Data Sources (sb db datasources)? Then show the smallest Multiple Data Sources sb db datasources example you can type. Then name the trap.

Technical Interview Tip: What is Multiple Data Sources (sb db datasources)? Show this: the smallest Multiple Data Sources sb db datasources example you can type. Trap: only saying “Multiple Data Sources sb db datasources” with no example.

Code Examples for Multiple Data Sources

Multiple Data Sources — working example

// application.properties
spring.datasource.url=jdbc:h2:mem:prep
spring.datasource.username=sa
spring.datasource.password=
spring.flyway.enabled=true

// JDBC sketch
// jdbcTemplate.query("SELECT id, email FROM users", mapper);

// Thymeleaf view name "home" -> templates/home.html
// <p th:text="${message}">msg</p>

Multiple Data Sources — boot wires DataSource/JDBC/Flyway from properties; Thymeleaf renders server-side HTML templates.

How to Explain Multiple Data Sources to an Interviewer

What is Multiple Data Sources (sb db datasources)?

Used for a short Multiple Data Sources sb db datasources example a small REST app Not just the heading

Give one small example of Multiple Data Sources (sb db datasources).

the smallest Multiple Data Sources sb db datasources example you can type Configuring and routing between two databases

What mistake do beginners make with Multiple Data Sources (sb db datasources)?

only saying “Multiple Data Sources sb db datasources” with no example Show the fix

Where do you use Multiple Data Sources (sb db datasources)?

a small REST app a short Multiple Data Sources sb db datasources example