Deploy and Configure an Azure Virtual Machine Scale Sets AZ-104 Practice Questions (Page 5)

Questions 21–25

1. 21expert · hard

   Your Virtual Machine Scale Set is experiencing performance issues. You have configured autoscale rules based on CPU, but the scale set is not scaling out as expected. You need to determine if the autoscale rules are working correctly. What should you do?

   • ACheck the CPU metrics for the scale set instances to see if they are above the threshold
   • BReview the load balancer health probe logs to see if instances are healthy
   • CCheck the NSG rules to see if they are blocking autoscale traffic
   • DCheck the autoscale run history to see if any scale-out events have occurred
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2. 22application · medium

   Your Virtual Machine Scale Set is configured with autoscale rules that scale out when average CPU usage exceeds 75% for 10 minutes. During a recent load test, the scale set scaled out to 8 instances, but after the load subsided, the instance count remained at 8 for over an hour. You need to ensure the scale set scales back in when demand drops. What should you configure?

   • AA schedule-based rule that scales in at a specific time each day
   • BA scale-out rule that scales out when CPU usage exceeds 90% for 5 minutes
   • CA rule that scales in when the number of instances exceeds the maximum limit
   • DA scale-in rule that scales in when average CPU usage drops below 30% for 10 minutes
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4. 23foundation · easy

   You need to set up autoscale for a scale set so that it adds one instance when CPU usage exceeds 80% for 10 minutes. Which Azure resource do you configure?

   • ALoad balancer rule
   • BNetwork security group
   • CScale set extension
   • DAutoscale settings
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5. 24application · medium

   You are deploying a Virtual Machine Scale Set that will host a stateless web application. The scale set must be reachable from the internet on port 443 and must distribute traffic across all instances. You also need to ensure that only HTTPS traffic is allowed to the scale set. What should you configure?

   • AAttach an internal Azure Load Balancer to the scale set and place the scale set in a subnet with an NSG that allows TCP 443 from the internet.
   • BAssign each scale set instance a public IP address and configure the Azure Application Gateway to route traffic to those IPs.
   • CCreate a public Azure Load Balancer, add a load-balancing rule for port 80, and rely on the NSG to redirect HTTP to HTTPS.
   • DAttach a public Azure Load Balancer to the scale set, add an inbound NAT rule for port 443, and apply an NSG that allows only TCP 443 from the internet.
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6. 25application · medium

   A Virtual Machine Scale Set has an instance that is running an outdated application version. You need to update that specific instance to the latest version without affecting other instances. What should you do?

   • AUse 'az vmss restart' to restart the specific instance.
   • BUse 'az vmss delete-instances' to delete the instance and then increase the instance count.
   • CUse 'az vmss update-instances' to update the specific instance to the latest model.
   • DUse 'az vmss reimage' to reimage the specific instance.
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