Kafka is mostly written in which programming language?

Kafka is mostly written in which programming language?

• A. Java
• B. Scala
• C. Go
• D. Python

Answer: (B)

Kafka’s codebase runs on the Java Virtual Machine and is written primarily in Scala, with Java interop. Scala was chosen for its concise syntax and powerful support for functional programming and concurrency, which suits the needs of a distributed streaming system. The project began in the Scala ecosystem and, while Java code is also part of the codebase, the core components—handling the broker logic, partitioning, replication, and streaming APIs—are dominated by Scala. That combination on the JVM is why the most accurate way to describe Kafka’s main implementation language is Scala. Go and Python aren’t used for the core Kafka implementation, and while Java is present, it isn’t described as the majority language.

Kafka’s codebase runs on the Java Virtual Machine and is written primarily in Scala, with Java interop. Scala was chosen for its concise syntax and powerful support for functional programming and concurrency, which suits the needs of a distributed streaming system. The project began in the Scala ecosystem and, while Java code is also part of the codebase, the core components—handling the broker logic, partitioning, replication, and streaming APIs—are dominated by Scala. That combination on the JVM is why the most accurate way to describe Kafka’s main implementation language is Scala. Go and Python aren’t used for the core Kafka implementation, and while Java is present, it isn’t described as the majority language.