Pub/Sub & Streams interview questions

1. A.a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages
2. B.a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
3. C.the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list
4. D.listening to multiple channels at once by matching their names against a glob expression rather than naming each one

Answer + AI explanation with Pro

1. A.Pattern subscription
2. B.Acknowledgement
3. C.Consumer group
4. D.Publish-subscribe

Answer + AI explanation with Pro

1. A.Publish-subscribe — the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list
2. B.Publish-subscribe — a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
3. C.Publish-subscribe — a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages
4. D.Publish-subscribe — the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client

Answer + AI explanation with Pro

1. A.listening to multiple channels at once by matching their names against a glob expression rather than naming each one
2. B.a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
3. C.the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client
4. D.a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages

Answer + AI explanation with Pro

1. A.Consumer group
2. B.Pattern subscription
3. C.Pending entries list
4. D.Acknowledgement

Answer + AI explanation with Pro

1. A.Pattern subscription — the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client
2. B.Pattern subscription — listening to multiple channels at once by matching their names against a glob expression rather than naming each one
3. C.Pattern subscription — a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
4. D.Pattern subscription — the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list

Answer + AI explanation with Pro

1. A.listening to multiple channels at once by matching their names against a glob expression rather than naming each one
2. B.a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
3. C.the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list
4. D.the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client

Answer + AI explanation with Pro

1. A.Acknowledgement
2. B.Consumer group
3. C.Publish-subscribe
4. D.Pending entries list

Answer + AI explanation with Pro

1. A.Consumer group — a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
2. B.Consumer group — the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client
3. C.Consumer group — a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages
4. D.Consumer group — listening to multiple channels at once by matching their names against a glob expression rather than naming each one

Answer + AI explanation with Pro

1. A.a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages
2. B.the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client
3. C.a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
4. D.the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list

Answer + AI explanation with Pro

1. A.Pending entries list
2. B.Pattern subscription
3. C.Consumer group
4. D.Acknowledgement

Answer + AI explanation with Pro

1. A.Acknowledgement — a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages
2. B.Acknowledgement — listening to multiple channels at once by matching their names against a glob expression rather than naming each one
3. C.Acknowledgement — a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
4. D.Acknowledgement — the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list

Answer + AI explanation with Pro

1. A.listening to multiple channels at once by matching their names against a glob expression rather than naming each one
2. B.a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
3. C.the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client
4. D.a fire-and-forget messaging model where senders post to named channels and any connected listeners receive matching messages

Answer + AI explanation with Pro

1. A.Pending entries list
2. B.Publish-subscribe
3. C.Acknowledgement
4. D.Consumer group

Answer + AI explanation with Pro

1. A.Pending entries list — a set of clients that cooperatively divide entries of one stream so each entry is delivered to exactly one member
2. B.Pending entries list — the signal a client sends confirming it finished processing a delivered stream entry so it leaves the pending list
3. C.Pending entries list — listening to multiple channels at once by matching their names against a glob expression rather than naming each one
4. D.Pending entries list — the per-group record of delivered but not-yet-confirmed entries, used to recover messages from a crashed client

Answer + AI explanation with Pro