Answer
DLQs store messages that fail processing.
Used for debugging and preventing message loss.
Quick Answer
Dead-letter queue (DLQ) is where messages go after failing to process successfully N times. Instead of dropping failed messages or blocking the queue, move them to a DLQ for manual inspection. You can inspect why they failed, fix the bug, and replay them. Essential for debugging and ensuring no data is silently lost in message-driven systems.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ