Apache Activemq Interview Questions and Answers (2024)
- Q: What Is ActiveMQ?
- Q: What is topic in ActiveMQ?
- Q: What is difference between ActiveMQ and AMQP?
- Q: Which open wire protocols ActiveMQ supports?
- Q: What are the advantages of combination of topics and queues over conventional topics?
Q: What Is ActiveMQ?
Ans:
Apache ActiveMQ is a Java-written open source message broker with Java Message Service (JMS) client.
Q: What is topic in ActiveMQ?
Ans:
Q: What is difference between ActiveMQ and AMQP?
Ans:
Advanced Message Queue Protocol (AMQP) is a standard for the interoperability of messaging clients and brokers. AMQP is a client-to-message broker communication wire-level protocol specification.AMQP is just a messaging
protocol and ActiveMQ is Messaging System.
Q: Which open wire protocols ActiveMQ supports? Ans:
It supports below open wire protocols:- OpenWire
- Stomp
- MQTT
Q: What are the advantages of combination of topics and queues over conventional topics?
Ans:
- Even if a consumer is offline, there will be no lost messages. ActiveMQ copies all messages to the queues that have been registered.
- If a consumer is unable to handle a message, a dead letter queue will be put on. The consumer can be resolved and the message can be transferred to his own dedicated queue without impacting the other consumer.
- To implement a load balancing mechanism we can register multiple instances of a consumer on a queue.