Below are the questions for Azure interview :-
Q #1 What all could be the backend of Basic Load balancer.
Q #2 Customer wanted very low latency between the Azure VM as that’s the need or requirement of the app. What all could you suggest.
Q #3 What is the best way to check which NSG rule is blocking the traffic.
Q #4 How to enable Hybrid benefit in Azure or how can I deploy VM using HUB ?
Q #4 What is scaling , Types and how can you use it to benefit your app?
Q #6 Can you change the Name of the Azure VM on the portal? If yes how ?
Q #7 Can you add the existing machine in the AV-set ? if yes how ?
Q #8 Difference between Managed disk and Unmanaged Disk ?
Q #9 If you want to load balance between AV-Zones what kind of Azure Load balancer you need ?
Q #10 If I create a standard managed disk from an existing VHD that's 80 GB, how much will that cost me?
Lets discuss the Answers -
Q #1 What all could be the backend of Basic Load
balancer
Single VM , multiple VM only if part of AV-set & VMSS
Q #2 Customer wanted
very low latency between the Azure VM as that’s the need or requirement of the
app. What all could you suggest
PPG , Accelerated networking & RSS ( Receive Side
Scaling)
A proximity placement group is an Azure Virtual Machine
logical grouping capability that you can use to decrease the inter-VM network
latency associated with your applications. When the VMs are deployed within the
same proximity placement group, they are physically located as close as
possible to each other. Proximity placement groups are particularly useful to
address the requirements of latency-sensitive workloads.
Accelerated networking enables single root I/O
virtualization (SR-IOV) to a VM, greatly improving its networking performance.
This high-performance path bypasses the host from the datapath, reducing
latency, jitter, and CPU utilization, for use with the most demanding network
workloads on supported VM types.
Accelerated networking enables on supported VM types &
for all other Windows VMs, using Receive Side Scaling (RSS) can reach higher
maximal throughput than a VM without RSS.
https://youtu.be/s2MvpRG9bQo
- Accelerated Networking
Q #3 What is the best
way to check which NSG rule is blocking the traffic.
Use the inbuilt feature of Azure monitor called network
watcher under network and diagnostic tools you will find IP flow verify . This
feature can you give exact rule which is blocking the traffic.
Q #4 How to enable
Hybrid benefit in Azure or how can I deploy VM using HUB ?
You can create from marketplace and use save money options and if you want to utilize
the HUB for existing one you can use configuration option on VM pane and use
HUB
Q #5 What is scaling ,
Types and how can you use it to benefit your app?
Q #6 Can you change
the Name of the Azure VM on the portal? If yes how ?
Q #7 Can you add the
existing machine in the AV-set ? if yes how ?
Q #8 Difference
between Managed disk and Unmanaged Disk ?
Managed Disks = are managed
by Microsoft Azure and you don't need any storage account while created new
disk. Since the storage account is managed by Azure you do not have full
control of the disks that are being created.
Un-managed Disks = is
something which requires you to create a storage account before you create any
new disk. Since, the storage account is created and owned by you, you have full
control over all the data that is present on your storage account.
Additionally, you also need to take care of encryption, data recovery plans
etc.
New features or
benefits of Managed disk :-
1.Simple
and scalable VM deployment: Managed Disks will allow you to create up to 10,000
VM disks in a subscription, which will enable you to create thousands of VMs in
a single subscription.
2.Better
reliability for Availability Sets: Managed Disks provides better reliability
for Availability Sets by ensuring that the disks of VMs in an Availability Set
are sufficiently isolated from each other to avoid single points of failure.
3.
Highly durable and available
4.
Granular access control: You can use
Azure Role-Based Access Control (RBAC) to assign specific permissions for a
managed disk to one or more users. Managed Disks exposes a variety of
operations, including read, write (create/update), delete, and retrieving a
shared access signature (SAS) URI for the disk.
5.
Azure Backup service support: Use Azure
Backup service with Managed Disks to create a backup job with time-based
backups, easy VM restoration and backup retention policies
Q #9 If you want to
load balance between AV-Zones what kind of Azure Load balancer you need ?
we need Standard LB which is compatible as per zones and
standard IP if its public LB.
Q #10 If I create a
standard managed disk from an existing VHD that's 80 GB, how much will that
cost me?
A standard
managed disk created from an 80-GB VHD is treated as the next available
standard disk size, which is an S10 disk. You're charged according to the S10
disk pricing.
