AWS CLOUD - ALC - TEST 12 : Question 1 of 67

You are the solutions architect and have decided to use Amazon SQS, what all care should you take when using SQS? You are the solutions architect and have decided to use Amazon SQS, what all care should you take when using SQS?

1 Mark(s)

Use Long polling to reduce your cost of using Amazon SQS
Design your applications to be idempotent
Use Dead-Letter Queues for messages that cant be processed (consumed) successfully.
Use Amazon SNS as backup for Amazon SQS i.e. make sure you send every message to SNS

In which scenarios is it possible that S3 can serve stale data? In which scenarios is it possible that S3 can serve stale data?

1 Mark(s)

GET after overwrite PUT
LIST after DELETE
GET after DELETE
GET after PUT of a new Object

Which are the different types of programmatic actors in Amazon SWF? Which are the different types of programmatic actors in Amazon SWF?

1 Mark(s)

deciders
activity workers
workflow starters
Activity tasks

Which of the below statements are true about Auto Scaling? Which of the below statements are true about Auto Scaling?

1 Mark(s)

Auto Scaling launches a new instance to replace the terminated instance.
When your instance is terminated, any associated EBS volumes are detached.
After an instance has been marked unhealthy, Auto Scaling will terminate the instance.
When your instance is terminated, any associated Elastic IP addresses are automatically associated with the new instance.

You are a solutions architect, your application needs to cache data in sorted order, also there are geospatial indexes. Which of the below are best suited for this? You are a solutions architect, your application needs to cache data in sorted order, also there are geospatial indexes. Which of the below are best suited for this?

1 Mark(s)

Amazon Redshift
Amazon EBS
Amazon ElasticCache using Memcached
Amazon ElasticCache using Redis

You are building a web application and want to use RDS as database layer, throughout the day you get consistent load and it is high I/O-intensive workload, which storage class will you choose for your RDS? You are building a web application and want to use RDS as database layer, throughout the day you get consistent load and it is high I/O-intensive workload, which storage class will you choose for your RDS?

1 Mark(s)

Provisioned IOPS
Magnetic
General Purpose (SSD) - GP2
S3 with High IO

What is a dead-letter queue in Amazon SQS? What is a dead-letter queue in Amazon SQS?

1 Mark(s)

A dead-letter queue is a queue that to which the message is forwarded after visibility timeout.
A dead-letter queue is a queue that other (source) queues can target for messages that cant be processed (consumed) successfully.
Once a queue is deleted it stays as dead-letter queue for 1 day
Once the message is processed it will be forwarded to dead-letter queue

How is fanout done in Amazon SNS? How is fanout done in Amazon SNS?

1 Mark(s)

Amazon SNS message is sent to a topic and then replicated and pushed to multiple Amazon SQS queues, HTTP endpoints, or email addresses.
Amazon SNS message is sent to a SWF topic and then SWF replicates and pushes it to HTTP endpoints, or email addresses
Amazon SNS message is sent to a SQS queue and then SQS replicates and pushes it to HTTP endpoints, or email addresses
Amazon SNS message is sent to multiple topics in SNS and then replicated and pushed to multiple Amazon SQS queues, HTTP endpoints, or email addresses

DNS servers uses which port? DNS servers uses which port?

1 Mark(s)

161
22
8080
53

Given Object URL http://my.buck.1.s3.amazonaws.com/obj1/test.doc? Given Object URL http://my.buck.1.s3.amazonaws.com/obj1/test.doc?

1 Mark(s)

my.buck.1 is the bucket and obj1/test.doc is the key
my.buck.1 is the bucket and test.doc is the key
buck is the bucket and obj1/test.doc is the key
obj1/test.doc is the bucket and my.buck.1 is the key

Which of the below statements about Message retention are true? Which of the below statements about Message retention are true?

1 Mark(s)

By default, a message is retained for 4 days. The minimum is 60 seconds (1 minute). The maximum is 14 days.
By default, a message is retained for 1 days. The minimum is 60 seconds (1 minute). The maximum is 1 month
By default, a message is retained for 14 days. The minimum is 30 seconds. The maximum is 1 year
By default, a message is retained for 1 day. The minimum is 30 seconds. The maximum is 14 days.

What can you cache using Amazon ElastiCache for Memcached? What can you cache using Amazon ElastiCache for Memcached?

1 Mark(s)

transaction information such as bank account balance
content in persistent data stores such as Amazon RDS, DynamoDB
dynamically generated web pages
transient session data

Which of the below are true about restoring EBS Volume from a Snapshot? Which of the below are true about restoring EBS Volume from a Snapshot?

1 Mark(s)

The data on EBS Volume is available immediately
EBS volumes that are restored from encrypted snapshots are automatically encrypted.
You can restore EBS Volumes using their name
EBS Volumes can be restored from EFS

The local secondary index must meet which of the following conditions? The local secondary index must meet which of the following conditions?

1 Mark(s)

The sort key of the base table is projected into the index, where it acts as a non-key attribute.
The sort key has to be of type integer
The partition key is the same as that of its base table.
The sort key consists of exactly one scalar attribute.

What are the possible reasons to configure cross-region replication on a S3 bucket? What are the possible reasons to configure cross-region replication on a S3 bucket?

1 Mark(s)

To backup data
Compliance requirements might dictate that you store data at even further distances.
You have compute clusters in two different regions that analyze the same set of objects.
To minimize latency in accessing objects.

Which all statements about S3 are true? Which all statements about S3 are true?

1 Mark(s)

S3 stores data in fixed size blocks
In S3 Object key can contain only numbers
In S3 Objects contain both data and metadata
S3 Objects are stored in buckets

Which of the below features can restrict access to S3? Which of the below features can restrict access to S3?

1 Mark(s)

S3 Bucket policy
Upload Objects using Pre-Signed URLs
Lifecycle policy for S3 buckets
Amazon S3 ACL on Bucket

Amazon CloudWatch offers which kind of monitoring? Amazon CloudWatch offers which kind of monitoring?

1 Mark(s)

CloudTrail Monitoring
Autoscaling Monitoring
Micro Monitoring
Detailed Monitoring
Basic Monitoring

Amazon ElasticCache supports which of the cache engines? Amazon ElasticCache supports which of the cache engines?

1 Mark(s)

Guava and CouchBase
Memcached and MemDB
Solr and CouchBase
Memcached and Redis

What is the order in which Amazon SQS Standard Queues deliver messages? What is the order in which Amazon SQS Standard Queues deliver messages?

1 Mark(s)

FIFO (First-In-First-Out)
The delivery order is not guaranteed
LIFO (Last-In-First-Out)

What will the load balancer do when the load balancer detects an unhealthy target? What will the load balancer do when the load balancer detects an unhealthy target?

1 Mark(s)

it stops routing traffic to that unhealthy target and then that instance will be isolated and will not be used even in case it becomes healthy again
it will terminate the unhealthy target and launch a new instance
it stops routing traffic to that unhealthy target and then it resumes routing traffic to unhealthy target only when it detects that the target is healthy again
it will keep sending traffic to the unhealthy target until it is up and running

Which of the below statements about Elastic Load Balancing are true? Which of the below statements about Elastic Load Balancing are true?

1 Mark(s)

Elastic Load Balancing can handle the varying load of your application traffic across multiple Availability Regions
Elastic Load Balancing can handle the varying load of your application traffic across multiple Availability Zones
Elastic Load Balancing can handle the varying load of your application traffic across multiple Regions and your private datacenter.
Elastic Load Balancing can handle the varying load of your application traffic across VPC.

Does Amazon ElastiCache for Redis support Multi-AZ operation? Does Amazon ElastiCache for Redis support Multi-AZ operation?

1 Mark(s)

No, with Amazon ElastiCache for Redis does not support Multi-AZ operation
Yes, with Amazon ElastiCache for Redis you can create a read replica in another AWS Availability Zone.
Yes, there will be multiple primary nodes created in each Zone. You can send write request to any of these primary nodes.
Yes, but it is supported within a single zone

You have a long running m3.large linux reserved instance in us-west-1a, which of the below modifications are allowed on this instance? You have a long running m3.large linux reserved instance in us-west-1a, which of the below modifications are allowed on this instance?

1 Mark(s)

Modify instance type to m3.xlarge
Modify instance type to t1.micro
Modify Availability Zone to us-west-1b
Modify instance type to m1.large

Which RDS engines support read replicas? Which RDS engines support read replicas?

1 Mark(s)

Oracle
Amazon Aurora
MySQL
MariaDB
PostgreSQL

What are the different types Elastic load balancer in a VPC? What are the different types Elastic load balancer in a VPC?

1 Mark(s)

Cross region load balancer
Internet-facing load balancer
Cross Zone load balancer
Internal load balancer

What is the responsibility of Deciders in Amazon SWF? What is the responsibility of Deciders in Amazon SWF?

1 Mark(s)

Decider is an implementation of a workflows coordination logic.
When the decider receives the decision task from Amazon SWF, it analyzes the workflow execution history to determine the next appropriate steps in the workflow execution.
Deciders control the flow of activity tasks in a workflow execution.
Decider initiates workflow executions

Which of the below statements about Amazon Auto Scaling are true? Which of the below statements about Amazon Auto Scaling are true?

1 Mark(s)

You can use Auto Scaling for balancing the load across multiple zone.
You can use Auto Scaling to dynamically scale your Amazon EC2 capacity up or down automatically according to conditions you define.
You can use Auto Scaling for Fleet Management of EC2 instances to help maintain the health and availability of your fleet.
With Application Auto Scaling, you can automatically scale resources for other AWS services beyond Amazon EC2.

Which of the below statements are true about Amazon RDS read replicas? Which of the below statements are true about Amazon RDS read replicas?

1 Mark(s)

You can create one or more replicas of a given source DB Instance
The read replica operates as a DB instance that allows only read-only connections, applications can connect to a read replica just as they would to any DB instance
Amazon RDS Read Replicas provide enhanced performance and durability for database (DB) instances.
Amazon RDS automatically sends write requests in parallel to each of the read replicas and primary DB instance

Which of the below is NOT a valid record for the amazon.com hosted zone? Which of the below is NOT a valid record for the amazon.com hosted zone?

1 Mark(s)

www.aws.amazon.com
www.amazon.com
www.amazon.ca
invalid.amazon.com

You are a solutions architect working on a Mobile application, the application is running slow and has response time over 5 seconds. After debugging you realized that the fetching of user profile information from the database is taking longer time. This user profile information rarely changes. Which of the below will help you application performance? You are a solutions architect working on a Mobile application, the application is running slow and has response time over 5 seconds. After debugging you realized that the fetching of user profile information from the database is taking longer time. This user profile information rarely changes. Which of the below will help you application performance?

1 Mark(s)

Amazon RDS
Amazon ElasticCache
DynamoDB
CloudWatch
Redshift

You are using Elastic Load Balancer and you have only one load balancer and one ec2 instance running. You have currently 5K active users, now you launch another instance, but immediately when you check the connections are not evenly distributed across the 2 nodes. The new node has less connections and is increasing slowly as new users connect, the old node still has around 5K connections, what could be the reason? You are using Elastic Load Balancer and you have only one load balancer and one ec2 instance running. You have currently 5K active users, now you launch another instance, but immediately when you check the connections are not evenly distributed across the 2 nodes. The new node has less connections and is increasing slowly as new users connect, the old node still has around 5K connections, what could be the reason?

1 Mark(s)

you need to restart the load balancer
you need to restart both the instances
enable CloudWatch
sticky session is enabled

You are working on a Government application which mandates that you cannot share the physical host, which type of instances can you use in this case? You are working on a Government application which mandates that you cannot share the physical host, which type of instances can you use in this case?

1 Mark(s)

Reserved instances
On demand instances
Dedicated instances
Spot instances

Which are must configuration for Website Hosting on S3? Which are must configuration for Website Hosting on S3?

1 Mark(s)

Enable Website Hosting on bucket & Configure Index Document Support
Make the objects that you want to serve publicly readable.
Configure bucket for HTTP
Make all files text readable

You are working on a web application which will potentially have thousands of concurrent users, which technology would be best suited to store session state for these users? You are working on a web application which will potentially have thousands of concurrent users, which technology would be best suited to store session state for these users?

1 Mark(s)

CloudWatch
Amazon RDS
Amazon DynamoDB
Redshift

Which of the below statements about Amazon SQS messages are true? Which of the below statements about Amazon SQS messages are true?

1 Mark(s)

By default, a message is retained for 4 days.
The maximum visibility timeout for a message is 1 month
The maximum message size is 256 KB.
A message can contain max up to 10 metadata attributes.

Auto Scaling Groups support which types of plans? Auto Scaling Groups support which types of plans?

1 Mark(s)

Reserved auto scaling
Manual auto scaling
Dynamic auto scaling
Spot auto scaling
Predictive auto scaling
Scheduled auto scaling

What will happen if you set the Amazon SQS message timer i.e. DelaySeconds parameter to 30 seconds? What will happen if you set the Amazon SQS message timer i.e. DelaySeconds parameter to 30 seconds?

1 Mark(s)

The queue will delete the message if not processed within 30 seconds
The message will be added to the queue after 30 seconds
The message isnt visible to consumers for the first 30 seconds during which the message stays in the queue
The consumer needs to process the message within 30 seconds

Which of the below statements are true about Amazon ElasticCache? Which of the below statements are true about Amazon ElasticCache?

1 Mark(s)

When you delete an ElastiCache for Redis cluster, your manual snapshots will also be deleted.
Creating a snapshot from a read replica is the best way to backup your data while minimizing performance impact.
You cannot copy snapshots from one region to another
Snapshots are available only for ElastiCache for Redis, they are not available for Memcached
While taking a snapshot, you may encounter increased latencies for a brief period at the node.

What is the default Visibility Timeout for SQS Service? What is the default Visibility Timeout for SQS Service?

1 Mark(s)

120 seconds
1 day
1 hour
30 seconds

What is connection draining in Elastic Load Balancer? What is connection draining in Elastic Load Balancer?

1 Mark(s)

If you use connection draining the existing connections are closed and new connections are opened
If you use connection draining then Load Balancer stops sending requests to instances that are de-registering or unhealthy, while keeping the existing connections open
If you use connection draining then Load Balancer terminates the unhealthy instances
If you use connection draining then Load Balancer stops sending requests to instances that are de-registering or unhealthy, and closes the existing connections

What are Inflight Messages in case of Amazon SQS? What are Inflight Messages in case of Amazon SQS?

1 Mark(s)

A message which is still on wire and is being transmitted to the queue
A message is considered to be in flight after its received from a queue by a consumer, and has been deleted from the queue.
A message is considered to be in flight after its received from a queue by a consumer, but not yet deleted from the queue.
A message is considered to be in flight if its in the queue but has not been received by a consumer

Which of the below services are provided by Amazon Route 53? Which of the below services are provided by Amazon Route 53?

1 Mark(s)

health-checking web services
Domain Name System (DNS) Service
domain name registration
load balancer service

You are solutions architect and are running ElasticCache clusters running the Memcached engine with auto discovery enabled, now due to load you have decided add more nodes, what all changes are required on Client side? You are solutions architect and are running ElasticCache clusters running the Memcached engine with auto discovery enabled, now due to load you have decided add more nodes, what all changes are required on Client side?

1 Mark(s)

You cannot add new nodes to Memcached cluster
Turn off Auto Discovery
No changes needed
You need to add new Nodes IP address to the client configuration files.

Which of the below are true about EBS Volumes? Which of the below are true about EBS Volumes?

1 Mark(s)

EBS volumes persist independently from the running life of an EC2 instance.
EBS Volume can be attached to more than one instance
To prevent data loss EBS volumes are automatically replicated across regions
Only one volume can be attached to a single instance.
You can dynamically grow EBS volumes

How to test Multi-AZ failover for RDS? How to test Multi-AZ failover for RDS?

1 Mark(s)

its not possible to test failover scenario
Reboot primary instance through the Amazon RDS Console.
Enable CloudWatch
Terminate the primary instance and update the connection string

You are building a web application and want to use RDS. The database will occasionally have burst of activity for small amount of time, Which Storage Type will you choose for your database service to minimize the cost? you will be storing 5 GB of data? You are building a web application and want to use RDS. The database will occasionally have burst of activity for small amount of time, Which Storage Type will you choose for your database service to minimize the cost? you will be storing 5 GB of data?

1 Mark(s)

General Purpose (SSD) - GP2
Magnetic
S3

Which of the below statements about Amazon SQS - Queue Name and Queue URL are true? Which of the below statements about Amazon SQS - Queue Name and Queue URL are true?

1 Mark(s)

queue URL includes queue name
you can change the queue name any time.
Whenever you want to perform an action on a queue, you need to provide its queue URL.
queue name should be unique within the scope of all your queues

You have image processing application which is up with 5 reserved instances, this application uses Amazon Kinesis which is a Queue, then your instances process items from the queue. Sometimes the processing can fail and its ok to start the processing again. Recently you observed the number of items in the Queue has gone up and you would like to add some additional instances to make processing faster. Which would be most cost effective way of handling such a load? You have image processing application which is up with 5 reserved instances, this application uses Amazon Kinesis which is a Queue, then your instances process items from the queue. Sometimes the processing can fail and its ok to start the processing again. Recently you observed the number of items in the Queue has gone up and you would like to add some additional instances to make processing faster. Which would be most cost effective way of handling such a load?

1 Mark(s)

use 5 more reserved instances
use spot instances when the queue builds up
use dedicated instances instead of reserved instances
use 5 reserved and 5 dedicated instances

You are building an application and you have a Amazon SQS queue, there is another user account from different business unit who wants to consume from the queue, what would be the best way to give access to your queue? You are building an application and you have a Amazon SQS queue, there is another user account from different business unit who wants to consume from the queue, what would be the best way to give access to your queue?

1 Mark(s)

Share your credentials and in other applications configure them so they can use your queue
Such Grant is not possible
instead use SNS
Create SQS policy and in that policy grant access to that account

Which of the following can subscribe as an endpoint to Amazon SNS topic? Which of the following can subscribe as an endpoint to Amazon SNS topic?

1 Mark(s)

Mobile app
DynamoDB
web server
email address
Amazon RDS
Amazon SQS queue

Which of the below are true about VM Import/Export functionality in aws? Which of the below are true about VM Import/Export functionality in aws?

1 Mark(s)

You cannot export a VM that was previously imported from your virtualization environment
You cannot import disks as Amazon EBS snapshots
You can import a VM from your virtualization environment to Amazon EC2 as an EC2 instance.
You can import a VM from your virtualization environment to Amazon EC2 as an Amazon Machine Image (AMI)

There are some sensitive documents which you want only authenticated users to be able to access, also if they do not access within a day then the links should become invalid, how can you achieve this? There are some sensitive documents which you want only authenticated users to be able to access, also if they do not access within a day then the links should become invalid, how can you achieve this?

1 Mark(s)

Use static web hosting
Generate Pre-signed URLs for a day
IAM Policies to restrict the access
Use logging to track usage

You are a solutions architect and have configured Elastic Load Balancer, but the Clients cannot connect to the load balancer and sometimes receive an HTTP: 503 Service Unavailable or HTTP: 504 Gateway Timeout error message. What could be the possible cause? You are a solutions architect and have configured Elastic Load Balancer, but the Clients cannot connect to the load balancer and sometimes receive an HTTP: 503 Service Unavailable or HTTP: 504 Gateway Timeout error message. What could be the possible cause?

1 Mark(s)

The load balancer security group configuration is incorrect.
An incorrectly configured network access control list (ACL)
The load balancer does not have a listener configured for the port that the client is attempting to connect to.
Auto scaling is not enabled
The instance does not have a public IP address

In your application you publish a message to a Amazon SNS topic every time a new image is uploaded. There are some independent processes which needs to be done such as generate thumbnails, perform image recognition, and store metadata about the image, which is the best way to achieve this? In your application you publish a message to a Amazon SNS topic every time a new image is uploaded. There are some independent processes which needs to be done such as generate thumbnails, perform image recognition, and store metadata about the image, which is the best way to achieve this?

1 Mark(s)

Copy the message to S3 and create multiple SQS Queues
Create multiple SNS topics and then create multiple SQS Queues
Replicate the SNS topic and create multiple SQS Queues
From the SNS topic fanout identical messages to multiple standard SQS queues.

In case of SQS what is the maximum allowed visibility timeout? In case of SQS what is the maximum allowed visibility timeout?

1 Mark(s)

14 hours
1 hour
12 hours
24 hours

Which of the below should be executed by the user data? Which of the below should be executed by the user data?

1 Mark(s)

Installation of necessary web server, php, and mysql packages
EBS Volume snapshot
The distribution software packages update
Start httpd service and turned on via chkconfig

For responses exceeding 512 bytes, DNS uses which protocol ? For responses exceeding 512 bytes, DNS uses which protocol ?

1 Mark(s)

UDP
TCP
HTTPS
HTTP

Which are the different host zones support by Route 53? Which are the different host zones support by Route 53?

1 Mark(s)

Zonal hosted zone
Public hosted zone
Local hosted zone
Regional hosted zone
Global hosted zone
Private hosted zone

You are developing a web application which has a userid which is unique across the system. There is a table user_info in DynamoDB which has the partition key userid, which operation will you use to fetch a record for a particular user from this table? You are developing a web application which has a userid which is unique across the system. There is a table user_info in DynamoDB which has the partition key userid, which operation will you use to fetch a record for a particular user from this table?

1 Mark(s)

Scan
Find
Search
Query

You have created a new account and are deploying an application in region us-west-2 (Oregon). You will have 50 web servers at peak all of which are EC2 instances. You are using auto scaling group, while testing you realize you are not able to auto scale to more than 20 instances, what could be the reason? You have created a new account and are deploying an application in region us-west-2 (Oregon). You will have 50 web servers at peak all of which are EC2 instances. You are using auto scaling group, while testing you realize you are not able to auto scale to more than 20 instances, what could be the reason?

1 Mark(s)

For Auto Scaling max limit is 20
You cannot launch more than 20 instances of the same type in the same region
Auto scaling is mis-configured, configure it to launch in multiple regions
The default EC2 instance limit per region is 20, you can request and raise it.

Amazon SNS follows which kind of design principle? Amazon SNS follows which kind of design principle?

1 Mark(s)

Multicast messaging
One to One messaging
Singleton messaging
Publish/Subscribe (Pub/Sub) messaging

In Amazon SNS once you create a topic automatically what gets created? In Amazon SNS once you create a topic automatically what gets created?

1 Mark(s)

Table in DynamoDB
ARN - Amazon Resource Names (ARN) is created
Default Amazon SQS queue is created
Default S3 bucket for the SNS topic

Which of the following will help reducing cost of Amazon SQS? Which of the following will help reducing cost of Amazon SQS?

1 Mark(s)

Use Long polling
To reduce costs, batch your message actions, actions like send, receive, and delete messages.
set visibility timeout to the maximum time
Set Message Timers to maximum

Which are suitable use cases for Glacier? Which are suitable use cases for Glacier?

1 Mark(s)

Primary storage for Database
real time data
Data which is rarely accessed
To mount operating system

You have a blogging application and are using DynamoDB for storing comments, the table has attributes BlogId(String) this is unique for every blog, Comment (String), PostedOn(Timestamp). You want to retrieve the comments in sorted order and as fast as possible, which attributes should be Partition Key and Sort Key? You have a blogging application and are using DynamoDB for storing comments, the table has attributes BlogId(String) this is unique for every blog, Comment (String), PostedOn(Timestamp). You want to retrieve the comments in sorted order and as fast as possible, which attributes should be Partition Key and Sort Key?

1 Mark(s)

BlogId,PostedOn
PostedOn,BlogId
Comment,PostedOn
BlogId,Comment

Amazon Route 53 supports which of the following DNS record types? Amazon Route 53 supports which of the following DNS record types?

1 Mark(s)

A (address record)
SOT (service of transfer)
MX (mail exchange record)
CNAME (canonical name record)
AAAA (IPv6 address record)
SOA (start of authority record)