Exam 1z0-908 topic 1 question 31 discussion

Why focus on QN = 5? It has the highest average latency (21.03 s), meaning it is the slowest-running query. Even though it executes only once, it takes too long and could be causing a bottleneck. Why focus on QN = 4? It has the second-highest average latency (10.32 s), which is still significant. It has higher execution count (200) than QN = 5, meaning it might be slowing down the system more frequently. Why not the other options? QN = 3: Though it has 120.24 ms lock latency, its execution time (523.32 ms) is much lower than QN = 4 and 5. QN = 1: Has a high execution count (381,268) but low average latency (31.44 ms). This means optimizing it won’t have as much impact as fixing QN = 4 and 5. QN = 2: Even though it has high lock latency (30.06 s), its execution time is very low (358.34 µs). Final Answer: ✅ B. QN = 5 ✅ D. QN = 4

E. high lock time -- query 2 A. Long execution time, somewhat locking. -- query 3 query 1 looks fine though there are many executions.