12 real Patterns questions from the Message Queues bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Decoupling?
Junior
A.writing messages to a database table in the same transaction as state changes, then relaying them to avoid lost or dual-written events
B.a design where components communicate by emitting and reacting to notifications of state changes rather than direct calls
C.separating senders from receivers through an intermediary so neither needs the other to be available at the same moment
D.using a queue to absorb traffic spikes by holding work until slower consumers can drain it
A.Event-driven architecture — separating senders from receivers through an intermediary so neither needs the other to be available at the same moment
B.Event-driven architecture — writing messages to a database table in the same transaction as state changes, then relaying them to avoid lost or dual-written events
C.Event-driven architecture — using a queue to absorb traffic spikes by holding work until slower consumers can drain it
D.Event-driven architecture — a design where components communicate by emitting and reacting to notifications of state changes rather than direct calls
11. Which term means: "writing messages to a database table in the same transaction as state changes, then relaying them to avoid lost or dual-written events"?
A.Outbox pattern — separating senders from receivers through an intermediary so neither needs the other to be available at the same moment
B.Outbox pattern — a design where components communicate by emitting and reacting to notifications of state changes rather than direct calls
C.Outbox pattern — writing messages to a database table in the same transaction as state changes, then relaying them to avoid lost or dual-written events
D.Outbox pattern — using a queue to absorb traffic spikes by holding work until slower consumers can drain it
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