Exam AZ-104 topic 4 question 54 discussion

Correct Answer: Box 1: 2 70% for 1h, and then 90% for 5 minutes. So, from the default of 1 it will scale out out 1 more. So, 2 in total. Box 2: 4 90% for 1h and then 25% for 9minutes. So, from the default of 1 it will it scale in to the max 5 (60/5 = 12, which means 6 times scale out, because we have 5 minutes period of cool down). Then when it drops to 25% for 9 minutes and it will scale in once after 5 mins (since the average of the last 5 minutes is under 30% ), so it will decrease by 1, so 4 in total. Then it will have a cooldown of 5 minutes before scaling in again, but since only 4 minutes left from 9 minutes (9-5 = 4), it won't scale in again. So, 4 in total. Reference: https://docs.microsoft.com/en-us/azure/azure-monitor/learn/tutorial-autoscale-performance-schedule https://docs.microsoft.com/en-us/azure/azure-monitor/autoscale/autoscale-understanding-settings

I think: 2 4

If after deployment CPU usage is 70 percent for one hour and then reaches 90 percent for five minutes, at the time the total number of instances will be ==2 ( default is 1, 90% 5mins +1 = 2) If after deployment the CPU maintains constant usage of 90 percent for one hour, and then the average CPU usage is below 25 percent for nine minutes, at the point the number of instances will be == 4 (max is 5, interval is 5mins so -1 = 4 )

WRONG 2 4

6/13/24 on exam

- 1 - 5

2 and 4

This question was in exam 15/01/24

Box 1: 5 If the scale out rule Tile is configured the same as the scale in tile, the CPU is set to 305 (regardless of the rule name [...(Maximum) CpuPercentage > 85], one could presume the value is set to 30, because the instruction say "The scale out rule is configured with the same duration and cool down tile as the scale in rule" . With this setting scaling out starts right away with 70% CPU utilization and reaches 5. Box 2-4

00:00 = 1 Minimum instance 80% . 80% . 80% . 80% 00:10 = +1 = 2 instances (observe for 10 mins) 80% . 80% . 80% . 80% 00:15 = 2 cool down for 5 mis (First answer) . 80% . 80% . 80% 00:25 = 00:10 (scale event) - 00:25 for the next instance to be added

We should take to account system file compatibility and we only know that VM1 and VM2 run same system.

We should take to account system file compatibility and we only know that VM1 and VM2 run same system.

Box 1: 2 Box 2: 4

Simular question was on todays exam. (7th April 2023)

mlantonis is right, i'm changing my answer to 2 and 4. I missed to notice "The scale out rule is configured with the same duration and cool down tile as the scale in rule." Another observation i made is Max statistic works differently than Avg for the duration. Box1: 2 - When CPU reaches 90%, Max doesn't need to wait for duration 5 min. to evaluate, so instance count goes to 2 right away. But cooldown=5 min, so instance count stays at 2 after CPU holds at 90% for 5 minutes. Box 2: 4 - When CPU goes below 25%, after 5 minutes count=4. Cool down 5 min, so instance count after CPU stays below 25% for 9 minutes is 4.

Box 1: 2, Box 2: 3 Right after the 60th min, average CPU usage is below 25%. So at 60.01 min, CPU count is 4. Allowing 5 min cool down period, next check is at 65.1 min. CPU count will decrease by 1 again. So when you check CPU count at 69th minute, it would be 3

1. 2 (min 1 + 1 scale out) 2. 4 (max 5 - 1 scale in)