Apache Kafka Practice

A Kafka message is composed of several essential components that work together to identify and structure the message within the Kafka ecosystem. It consists of a key, a value, and metadata that includes important information such as the topic and offset.

The key serves as a unique identifier for the message, allowing consumers to determine its order and partitioning. The value represents the actual content of the message, which can be any type of data such as a string, JSON, or binary data. Finally, the metadata, which includes the topic and offset, provides context about where the message resides within the system. The topic indicates which stream of messages the data belongs to, while the offset tells consumers the position of the message within that topic, crucial for maintaining order and tracking consumption.

The other options fall short in capturing the complete structure of a Kafka message. For instance, a single integer transaction ID does not encompass the broader aspects of identification and organization that a complete message requires. A message body without metadata lacks the contextual information that is vital for effective data processing and retrieval. Similarly, while a time-stamped log entry presents some relevant information, it does not fully represent the multifaceted nature of a Kafka message as it does not include key or value components that define the message