Answer
Wait types show where SQL is spending time (CPU, I/O, locks). Examples: CXPACKET, PAGEIOLATCH, LCK_M_X.
Quick Answer
Wait types tell you what SQL Server is waiting for — PAGEIOLATCH (disk I/O), LCK_M_X (lock wait), CXPACKET (parallelism), SOS_SCHEDULER_YIELD (CPU pressure). When a query is slow, checking wait stats points directly at the bottleneck. It's the fastest way to know where to look.
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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