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AWS SAA Exam Questions All Solved New Update (A+ Pass)
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AWS SAA Exam Questions All Solved New Update (A+ Pass) Describe 4 ec2 pricing options: On-demand, spot, reserved, dedicated - Answers -On-demand: pay by the hour or the second Spot: purchase unused capacity at a discount of up to 90% Reserved: Reserve capacity for 1 or 3 years for up to 7...

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  • October 3, 2024
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  • 2024/2025
  • Exam (elaborations)
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AWS SAA Exam Questions All Solved
New Update (A+ Pass)
Describe 4 ec2 pricing options:
On-demand, spot, reserved, dedicated - Answers -On-demand: pay by the hour or the second

Spot: purchase unused capacity at a discount of up to 90%

Reserved: Reserve capacity for 1 or 3 years for up to 72% discount

Dedicated: physical server dedicated for your use. Good if you have special licensing requirements.

what is bootstrap scripts? - Answers -a script that runs when the instance first runs

User Data and Metadata - Answers -User data are simply bootstrap scripts

Metadata is data about your EC2 instances. You can use bootstrap scripts to access metadata.

Describe 3 different networking devices - Answers -ENI: for basic networking.

Enhanced Networking: when you need speeds between 10 Gbps and 100 Gbps. Reliable, high
throughput.

EFA: High Performance Computing (HPC) and ML applications or if you need to do an OS-bypass.

What is placement groups and what are different types? - Answers -Placement groups is logical grouping
of EC2 instances. Only certain types of instances can be launched.

Cluster: low network latency, high network throughput. Within single zone. Homogenous instances are
recommended.

Spread: individual critical EC2 instances spread between different hardwares.

Partition: Multiple EC2 instances; HDFS, HBase, Cassandra

What is vCenter on AWS Cloud using VMware? - Answers -Extending your private VMware Cloud into
AWS public cloud

What is AWS Outposts? - Answers -Extending AWS to your data center to run AWS services on your on-
prem.

Rack for large deployments
Servers for smaller deployments

What is EC2 Hibernation? - Answers -Preserves RAM on persistent storage (EBS)

Explain difference between RDB's Multi AZ and Read Replica - Answers -Multi Availability Zone is used
for disaster recovery, and the AWS will take care of failing over if primary AZ fails.

Read Replica is a read-only copy of the database for performance enhancement. Read replica has its
own endpoint, so you will have to configure that in your application that connects to it. Read replica can
be in same AZ, cross-AZ or cross-region. Requires Automatic Backup enabled.

,AWS Aurora - Answers -2 copies of data contained in each AZ with minimum of 3 AZ. Can share
snapshots with other AWS accounts. Aurora replicas, MySQL replicas, Postgres replicas are available.
Auto failover is only available in Aurora replicas.

Aurora Serverless for intermittent unpredictable workloads.

Dynamo DB - Answers -Fully managed proprietary NoSQL database service that supports key-value and
document data structures.

Eventually consistent reads vs strongly consistent reads - Answers -Eventually: consistency across all
copies is usually reached within a second

Strongly: reflects all successful writes prior to the read

DynamoDB Accelerator (DAX) - Answers -fully managed, highly available, in-memory cache for
DynamoDB

provides up to 10x performance improvement

you specify the type and size of instances to use, and there is an associated hourly charge

What do you need to enable if you want ACID on DynamoDB? - Answers -DynamoDB Transactions.
ACID across 1 or more tables within a single AWS account and region. All-or-nothing transactions.

What is backup option for DynamoDB? - Answers -on-demand backup that allows full backup without
impact on production applications, in seconds. longer retention.

PITR (point in time recovery) can be enabled to create continuous incremental backups that can be used
to restore to any second in the last 35 days. Can export to s3.

DynamoDB global tables - Answers -Streams: FIFO sequence of data. Data is separated into shards for
manageability.

Global Tables: multi-master, multi-region replication. For multiregion redundancy for DR or HA. good for
globally distributed applications. based on dynamodb streams, so need streams enabled.

What is Amazon DocumentDB? - Answers -Document database service that supports MongoDB
workloads on AWS cloud

What is Cassandra? What is Amazon Keyspaces? - Answers -a distributed database (runs on many
machines) that uses NoSQL. used for big data. used by netflix.

keyspaces is Amazon's Apache Cassandra database service. It allows running Cassandra workloads on
AWS, fully managed.

What is Neptune? - Answers -Amazon's graph database service.

What is ledger database? what is Quantum ledger database (QLDB)? - Answers -Ledger database is a
cryptographically verifiable immutable nosql database. an update adds new record to the database. used
for cryptocurrencies, tracking shipping, tracking distribution of drugs.

QLDB: AWS's ledger database.

What is Amazon Timestream? - Answers -Time series data is data points that are logged over a series of
time e.g. temperature readings on the hour for years. IoT sensors, analytics.

, Amazon Timestream is Amazon's time series database service.

Name Relational db types - Answers -SQL, Oracle, mysql, postgres, mariadb, amazon aurora.

Creating VPC will automatically create which instances? - Answers -Network ACL, security group, and
route table.

What is the maximum number of ip address range in VPC? Minimum? - Answers -/28 to /16

Can a single subnet be associated with multiple AZ?
Can subnets in a single VPC be associated with multiple AZ? - Answers -No
Yes

How many IPs in a subnet are reserved for AWS internal use? - Answers -5

How many internet gateways can a VPC have? - Answers -1

How do you allow ec2 instance in private subnet to have internet access for patch updates but still
maintain privacy from internet? - Answers -Create NAT gateway, update private route table to route
internet traffic to the NAT gateway.

What is the difference between Network ACLs and Security groups? - Answers -Security groups are
stateful - if you send request from your instance, the response traffic for that request is allowed back in
regardless of inbound security group rules.

Network ACLs are stateless - responses to allow inbound traffic are subject to the rules for outbound
traffic and vice versa.

What is Network ACL? How many can one subnet have? - Answers -A "firewall" that controls traffic in and
out of one or more subnets. Only one Network ACL per subnet.

What are ephemeral ports? - Answers -A port temporarily used by the OS when a program requests any
available port
Ports 1024-65535

What are interface endpoints and gateway endpoints? - Answers -Types of VPC endpoints.
Interface endpoints enable connectivity to services over AWS Private Link.
Gateway endpoints targets specific IP routes in an Amazon VPC route table, used for traffic to
DynamoDB or S3.

How would you expose a service VPC to many customer VPCs? - Answers -AWS Private Link. Requires
Network LB on the service VPC and an ENI on the customer VPC.
No route tables, NAT gateways, internet gateways etc are needed.

What is AWS VPN CloudHub? - Answers -A hub-and-spoke model for connecting multiple remote branch
offices to an Amazon VPC

What is Direct Connect? - Answers -Cloud service to establish a dedicated network connection from on
prem to AWS. High throughput, stable, reliable compared to VPNs.

What is Transit Gateway? - Answers -Connects VPCs and onprem networks through a central hub.
Simplifies your network and puts an end to complex peering relationships. Acts as a cloud router - each
new connection is only made once.

What is AWS wavelength? - Answers -Mobile edge computing, 5G.

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