Aws Interview Questions

 1)..
three tier architecture in aws?
1)How to create 3 tier architecture into aws?
vpc
availability zones
ec2 servers
autoscalling group
load balancer 
6 -subnets
2 -public subnets
4-private subnets 


2).explain in network flow in three tier architecture in amazon
web service?
when user access the url then traffic would reach the load balancer
the application load balancer will receive the traffic 
which u specified which port or port type ,it will route to the
traffic to application tier
this request served from the application using the database 
in the backend 
3)..
what would be the operation networking setup which not exposed to the
customers but required for operations like patching????
which is required for the patching of the server
downloading applications-related packages from the internet
and third party integrations like payment gateways
here same routes are using here ...
4
).why does public subnet assign public ip to a server and 
a private doesn't?
the subnet is public because we have named it 

but one point we need to note this 

the subnet is always private and enable the automatic 
public assignment by updating the subnet settings in the action
pane
if you want to access the interent from private subnet we need to attach the natgateway
we need to enable auto assign public into action 
4)..How the network logging can be configured in vpc?
using vpc flow logs 

5)..what would be the routing  for public subnets?
its a internet gateway 

6)..what does route does ?

7).. How aws three tier architecture is working ?



----------------------------------------

Aws Interview Questions:

1). what are the networking challenges in a cloud environment ?
2). Describe the concept of virtual private cloud and
its advantages ..
3). How does load balancing contribute to scalability and fault tolerance?
4). what are the differences between a vpn and vpc ?
--------------------------------------------


1).What is the glacier?
2). How to recover or restore the data form glacier into aws?
3).Cloud computing models or services in aws cloud ?

.IAAS 

Best example for IAAS is : AWS , Ec2 Service and 
PAAS 

Best example for PAAS is : elastic Beanstalk , open shift

SAAS

Best Example of SAAS : google drive and drop box , Gmail ..

---------------------------------------------------------------------------------


Aws Interview Questions ::::::::::::

1)..

Explian the three basic types of cloud services and the aws products that are build based on them?

Computing : EC2, elastic Beanstalk , lamda , autoscalling,light sail..

storage : s3,glacier ,ebs and efs ..

Networking : vpc, cloudfront and route53..


2)..

How do you upgrdae or downgrade a system with near zero-downtime?

open ec2 console
choose os ami
launch an instmaces with new instance type
install all the updates
insatll applications
test the instances to see if its working'
if working, deploy the new instance and replace the older one
once its deployed , you can upgrade or downgrade the system with near zero time..

3)..

what are the aws security logging capabilities?

1).Cloud trail

2)config service 


4)..

what is DDOS attack and what services can minimize them?

waf
shield
cloud front'
route53
vpc

5)..

what are the different types of virtualization in AWS, and what are the differences between them?

para virtualization

HVm

para virtualization on hvm

6)..

Name of the some aws services that are not region specific in aws?

iam
s3 
route53
waf
cloud front


7)..

what are the different types of ec2 instances based on their cost/

on demand 

reserved instances 

spot instances
saving plans

dedicated host

ec2 reserved capacity

8)..

what are the common types of AMI design?

9)..

How can you recover the /login into ec2 instance for which you have lost key ?

10)..

What are the security features in Aws VPC?

security group
NACL -network access control list 
flow logs 

11)..

How can you add an existing instances to a new autoscalling group?

first login to the ec2 console

go to the server 

choose the action ''

go to the instance settings

attach to the autoscalling group

attach to the existing autoscalling group or create new ..

12).

How to attach the security groups ?
















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