The document provides an overview of AWS CloudWatch, a monitoring service for AWS resources, detailing its features, such as real-time monitoring of applications, the ability to set alarms, and integration with other AWS services. It also explains the difference between CloudWatch and CloudTrail, types of cloud services, how to use CloudWatch functions, and benefits such as insights into resource efficiency. Additionally, it covers practical aspects like creating dashboards, the use of canaries in monitoring, and the technical specifics of using the CloudWatch agent.

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50 Extraordinary AWS CloudWatch Interview
Questions & Answers
AWS CloudWatch Interview Questions
Amazon Web Services (AWS) is a cloud computing service provided by Amazon.
You can easily create, test, launch, and maintain your apps & services on Amazon
Web Services. Some important things to know about AWS CloudWatch:
AWS CloudWatch is a service that keeps an eye on the AWS resources you use and the
AWS apps you run. It can automatically set alarms, track and collect metrics, and respond
to changes in your AWS resources.
It is a management service tool designed for system architects, developers, and
administrators to monitor their Amazon web services applications
1. What is AWS CloudWatch?
Amazon Web Services (AWS) CloudWatch is a monitoring service for AWS resources
and the applications you run on the cloud platform. It provides data and operational
insights for resources such as Amazon Elastic Compute Cloud (EC2) instances, Amazon
DynamoDB tables, and Amazon RDS DB instances, as well as custom metrics generated
by your applications and services.
CloudWatch can monitor resources in real-time and send alerts when thresholds are
breached. It also provides a range of visualization and analysis tools to help you
understand and optimize your resources and applications.
2. Is CloudWatch free to use?
Yes, Amazon CloudWatch is available for free to use. Metrics for the majority of AWS
Services (EC2, S3, Kinesis, etc.) are sent directly and for free to CloudWatch. These
constraints on the free tier should be sufficient for many apps.
3. How do I use CloudWatch?
Create IAM users or roles that give the agent access to the server’s metrics and,
optionally, AWS Systems Manager integration. Get the agent bundle now. Specify the
metrics you wish to gather in the CloudWatch agent configuration file. Install the agent
on your servers, then launch it.
4. What is the difference between CloudWatch and CloudTrail?
AWS CloudWatch and AWS CloudTrail are both services provided by Amazon Web
Services (AWS), but they serve different purposes.

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AWS CloudWatch is a monitoring service for AWS resources and the applications you
run on the cloud platform. It provides real-time data and operational insights for
resources such as Amazon Elastic Compute Cloud (EC2) instances, Amazon DynamoDB
tables, and Amazon RDS DB instances, as well as custom metrics generated by your
applications and services. CloudWatch can monitor resources in real-time and send alerts
when thresholds are breached. It also provides a range of visualization and analysis tools
to help you understand and optimize your resources and applications.
On the other hand, AWS CloudTrail is a service that enables you to track changes to your
AWS resources and to troubleshoot issues. It provides a record of all API calls made to
your AWS accounts, including the request parameters, response elements, and any errors
that occurred. CloudTrail can be used to monitor and secure your AWS infrastructure, as
well as to ensure compliance with internal policies and regulations.
5. What is a CloudWatch Alarm?
The new CloudWatch Alarms feature helps in monitoring CloudWatch metrics and
receiving notifications when they fall outside of the levels (high or low thresholds) you
set. Each metric can have multiple Alarms, each with its own set of actions.
The status of a CloudWatch Alarm is always one of three: OK, ALARM, or
INSUFFICIENT DATA. The Monitor is in the OK state whenever the metric is within
the acceptable range that you have defined. When it reaches a certain threshold, it enters
the ALARM state. The monitor enters the INSUFFICIENT DATA state when the data
required to make the decision is missing or incomplete.
6. How does Amazon CloudWatch work?
Your applications and infrastructure resources may be monitored and managed using
Amazon CloudWatch, which offers a unified solution. It is a web service you can use to
gather metrics, understand your application and the infrastructure supporting it, and
automatically respond to changes. You can monitor AWS resources with Amazon
CloudWatch and adjust the monitoring to your company’s requirements.
7. List different types of Cloud Services
Cloud services can be broadly classified into three categories: infrastructure as a service
(IaaS), platform as a service (PaaS), and software as a service (SaaS). Here is a brief
overview of each type of cloud service:
1. Infrastructure as a Service (IaaS): IaaS is a type of cloud service that provides
infrastructure resources such as computing, storage, and networking on a pay-as-
you-go basis. IaaS providers typically offer a range of options for configuring and
customizing these resources to meet the needs of your applications and workloads.

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Examples of IaaS providers include Amazon Web Services (AWS), Microsoft
Azure, and Google Cloud Platform (GCP).
2. Platform as a Service (PaaS): PaaS is a type of cloud service that provides a
platform for developing, deploying, and managing applications on the cloud. PaaS
providers typically offer a range of tools and resources for building, testing, and
deploying applications, as well as services for managing and scaling them.
Examples of PaaS providers include AWS Elastic Beanstalk, Microsoft Azure App
Service, and Google App Engine.
3. Software as a Service (SaaS): SaaS is a type of cloud service that provides software
applications that can be accessed over the internet. SaaS providers typically offer
a range of applications that can be used for tasks such as productivity,
collaboration, customer relationship management, and more. Examples of SaaS
providers include Microsoft Office 365, Salesforce, and Google G Suite.
There are many other types of cloud services available, and the specific offerings can
vary significantly among different providers. Some other examples of cloud services
include data as a service (DaaS), security as a service (SECaaS), and communication as
a service (CaaS)
8. How can I monitor my AWS resources in near real-time?
You may gather and keep track of measurements in a timeframe that is close to real-time
by using AWS CloudWatch. The information regarding its metrics is kept as time-series
data points. In addition, each data point in a time series is accompanied by a timestamp
as well as a unit of measurement.
9. How to delete alarms in AWS CloudWatch Console?
Use the following command to delete the alarms in AWS CloudWatch Console:
aws cloudwatch delete-alarms --region us-east-2 --alarm-names ...
10. What is Power User Access in AWS?
The owner of the AWS resources will be comparable to an administrator user. It can
grant access to other users for the AWS resources that add, delete, change, or inspect the
resources. Administrator access is provided with Power User Access but without the
ability to control users and permissions.
In other words, a user who has Power User Access can create, delete, change, or view
the resources but cannot allow other users access.

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AWS CloudWatch Interview Questions:AWS Interview Questions
11. What are Cloudwatch Logs?
CloudWatch Logs is a tool that helps us monitor and troubleshoot our systems and
applications. It uses our already-established systems, applications, and custom log files.
In addition, it allows us to monitor our logs in real time for particular phrases, values, or
patterns.
12. What platforms are compatible with CloudWatch Logs Agent?
AWS CloudWatch Logs Agent is a software agent that enables you to send log data from
your on-premises servers, virtual machines, and containers to CloudWatch Logs. The
CloudWatch Logs Agent is compatible with the following platforms:
1. Amazon Linux AMI
2. CentOS
3. Debian
4. Oracle Linux
5. Red Hat Enterprise Linux (RHEL)
6. SUSE Linux Enterprise Server (SLES)
7. Ubuntu
The CloudWatch Logs Agent is also compatible with the following container platforms:
1. Amazon Elastic Container Service (ECS)
2. Amazon Elastic Container Service for Kubernetes (EKS)
3. Docker
You can install the CloudWatch Logs Agent on any of these platforms to send log data
to CloudWatch Logs. The agent can be installed and configured using the command line
or through configuration management tools such as AWS Systems Manager or Ansible.
Note that the CloudWatch Logs Agent is not compatible with Microsoft Windows. If you
want to send log data from a Windows machine to CloudWatch Logs, you can use the
CloudWatch Logs agentless integration, which uses the CloudWatch Logs API to send
log data directly from the Windows machine to CloudWatch Logs
13. Can you explain a metric in the context of CloudWatch?
A data point in a time series representing a particular measurement that occurs within
your AWS environment is referred to as a metric. To monitor your environment and

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determine any problems, you can use CloudWatch to gather and track metrics generated
by AWS resources.
14. What’s the difference between Google Stackdriver and Amazon CloudWatch?
Google Stackdriver and Amazon CloudWatch are both cloud-based monitoring and
logging services that provide tools and resources for monitoring and optimizing the
performance and availability of cloud resources and applications. However, there are
some key differences between the two services:
1. Provider: Stackdriver is a monitoring and logging service provided by Google
Cloud Platform (GCP), while CloudWatch is a service provided by Amazon Web
Services (AWS).
2. Supported resources: Stackdriver supports a wide range of Google Cloud Platform
resources, including Compute Engine, Kubernetes Engine, and App Engine, as
well as third-party services such as Amazon Web Services (AWS) and Azure.
CloudWatch supports a wide range of AWS resources, including Amazon Elastic
Compute Cloud (EC2), Amazon DynamoDB, and Amazon Relational Database
Service (RDS), as well as custom metrics generated by your applications and
services.
3. Features: Both Stackdriver and CloudWatch offer a range of features for
monitoring and analyzing resource performance and availability. However, there
are some differences in the specific features and capabilities offered by the two
services. For example, Stackdriver provides support for debugging and error
tracking, while CloudWatch offers more advanced visualization and analysis tools.
Overall, while both Stackdriver and CloudWatch are useful tools for monitoring and
optimizing the performance and availability of cloud resources and applications, they
have some differences in terms of the resources they support and the specific features
they offer
15. What are some of the benefits of using AWS CloudWatch?
You may use AWS CloudWatch to monitor your Amazon DynamoDB tables, Amazon
EC2 instances, and Amazon RDS DB instances, among other AWS resources, to gain
valuable insights into their efficiency and effectiveness.
CloudWatch tracks both AWS Lambda operations and Amazon API Gateway APIs.
CloudWatch allows you to configure alarms with instantaneous responses to changes in
your AWS infrastructure.
16. Is it possible for CloudWatch to automatically delete old logs?
No, CloudWatch does not automatically clean up old logs in the background. When you
no longer require the old logs, you must manually delete them from the system

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17. How to get additional lines of context in a CloudWatch Insights query?
In AWS CloudWatch Insights, you can use the context function to retrieve additional
lines of context around a specific event in your log data. The context function takes two
arguments: the number of lines of context to retrieve before and after the event.
Here is an example of a CloudWatch Insights query that retrieves three lines of context
before and after each event:
fields @timestamp, @message
| sort @timestamp desc
| limit 20
| context 3 3
This query will display the timestamp and message fields for the most recent 20 events
in your log data, sorted in descending order by timestamp. It will also display three lines
of context before and after each event.
You can adjust the number of lines of context by changing the arguments of
the context function. For example, to retrieve five lines of context before and after each
event, you can use the following query:
fields @timestamp, @message
| sort @timestamp desc
| limit 20
| context 5 5
18. How long do Cloudwatch Logs store our metadata?
We can keep a record of your information for as long as we think is necessary, which
gives us the freedom to change the LogGroup retention settings whenever we see fit. It
also allows us to keep a record of our metadata indefinitely.
19. What are CloudWatch Metric Streams?
CloudWatch Metric Streams is a feature that allows you to stream CloudWatch metrics
to a destination of your choice indefinitely with minimal setup and configuration. It is a

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fully managed solution that eliminates the need for you to write code or maintain
infrastructure. Users can configure a metric stream to destinations such as Amazon
Simple Storage Service with a few clicks (S3). To maintain your operational dashboards
up to date, users could also send the metrics to a number of third-party service providers.
20. What is Amazon CloudWatch Synthetics?
To monitor your endpoints and APIs, you can use Amazon CloudWatch Synthetics to
create canaries, which are configurable scripts that run on a schedule. The canaries take
the same routes and perform the same actions as customers, allowing you to continuously
validate your customer experience even if there is no customer traffic on your
applications. You can detect problems before your customers do by using canaries.
Synthetic Monitoring is an effective way of testing a website or web service by
simulating visitor requests to test for availability, performance, and functionality.
21. What are the Canaries in Amazon CloudWatch Synthetics?
Scripts written in Node.js or Python are known as Canaries. In your account, users create
Lambda functions that use Node.js or Python as a framework. Canaries support both the
HTTP and HTTPS protocols.
22. How do you integrate CloudWatch with EC2 instances?
Installing the CloudWatch agent on AWS EC2 instances allows you to integrate
CloudWatch with those instances. You can collect metrics and log files from your EC2
instances using the CloudWatch agent and then submit them to CloudWatch.
23. How Can I Implement CloudWatch Access Management Policies?
You can determine which CloudWatch operations a user associated with your AWS
Account can carry out using the integration that CloudWatch provides with AWS
Identity and Access Management (IAM). Using IAM to restrict who can view the data
in CloudWatch for particular resources is impossible. It is impossible to give a single
individual access to the CloudWatch data for, for example, just one group of instances
or a single LoadBalancer. All cloud resources that CloudWatch uses are subject to the
permissions that IAM grants. Furthermore, IAM roles are not supported by the Amazon
CloudWatch command line tools.
24. What are three things you can do in CloudWatch?
AWS CloudWatch is a monitoring service for AWS resources and the applications you
run on the cloud platform. Here are three things you can do with CloudWatch:

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1. Monitor resources in real-time: CloudWatch allows you to monitor the
performance and availability of your AWS resources in real-time. You can set
alarms to be triggered when thresholds are breached, and view real-time data and
operational insights for resources such as Amazon Elastic Compute Cloud (EC2)
instances, Amazon DynamoDB tables, and Amazon RDS DB instances.
2. Analyze and optimize resource performance: CloudWatch provides a range of
tools for analyzing and optimizing the performance of your resources. You can use
CloudWatch dashboards to visualize and compare metrics over time, and use
CloudWatch Insights to run ad-hoc queries and identify patterns in your log data.
3. Automate actions: CloudWatch can be integrated with other AWS services, such
as Amazon Simple Notification Service (SNS) and AWS Lambda, allowing you
to automate actions based on the results of CloudWatch alarms. For example, you
can use CloudWatch to trigger an SNS notification when an EC2 instance is
running low on available memory, or to automatically scale up or down your EC2
fleet based on changes in CPU utilization.
Overall, CloudWatch is a powerful tool for monitoring and optimizing the performance
and availability of your AWS resources and applications. It provides real-time data and
operational insights, as well as a range of tools for analysis and automation.
26. What is Amazon CloudWatch ServiceLens?
Amazon CloudWatch ServiceLens is a new feature that lets you visualize and analyze
the health, performance, and availability of your applications in one place. Amazon
CloudWatch ServiceLens is accessible in all public AWS Regions that offer AWS-X-
Ray.
AWS CloudWatch Interview Questions and Answers For Experienced
27. What is an AWS CloudWatch Alarm?
An AWS CloudWatch Alarm is a monitoring and management solution for AWS
resources. It enables the configuration of alarms based on individual indicators or as part
of a larger monitoring plan.
28. What does Amazon CloudWatch Synthetics work?
Canaries are pre-programmed scripts that run on a predetermined schedule. You can use
Amazon CloudWatch Synthetics to create canaries to monitor your endpoints and APIs.
The canaries travel the same routes as consumers and perform the same tasks, allowing
you to validate the quality of the user experience even when no actual customer activity
is occurring on your apps. You can detect problems before your clients do by using
canaries.
By simulating the queries of potential visitors, a method known as “synthetic
monitoring” can be used to evaluate the availability, performance, and functionality of a
website or online service.

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29. How do you create a dashboard in CloudWatch?
To create a dashboard in AWS CloudWatch, follow these steps:
1. Sign in to the AWS Management Console and navigate to the CloudWatch
console.
2. In the left navigation pane, click “Dashboards” to view the list of existing
dashboards.
3. Click the “Create dashboard” button.
4. Enter a name and optional description for your dashboard.
5. To add a widget to your dashboard, click the “Add widget” button and select the
type of widget you want to add. You can choose from a range of widget types,
including line and bar charts, gauges, and text widgets.
6. In the widget settings, specify the data source for the widget and use the query
builder to specify the CloudWatch metrics that you want to visualize. You can also
customize the display of the widget, including the time range, the display format,
and the visualization type.
7. Repeat steps 5 and 6 to add additional widgets to your dashboard.
8. When you are finished adding widgets, click the “Save dashboard” button to save
your dashboard.
30. How Do I Retrieve My Log Data on Amazon CloudWatch?
The Logs API on Amazon CloudWatch is where you can obtain your logged information.
Since it is an HTTP-based API, your logs are accessible from almost any computer,
anywhere globally. You can find the Logs section of the Amazon CloudWatch
dashboard. All your logs set up to be tracked and retrieved will be displayed here.
AWS Scenario Based Interview Questions
31. Which service in AWS is used for real-time monitoring?
CloudTrail is the tool used for continuous monitoring. The API calls your apps can be
tracked with CloudTrail. The logs also include details about each API request performed
by AWS services.
32. What Actions Can We Take From a Cloudwatch Alarm?
The following actions are possible in response to a cloud watch alarm:
• Share an email with the team.
• Schedule a Cron task to run.

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• Share on Slack or HipChat.
• Run a script on this machine, such as one that imports data into a spreadsheet.
33. What Thresholds Can I Set To Trigger A Cloudwatch Alarm?
If you have access to the AWS Management Console, you can also use it to create
Thresholds that will cause a Cloudwatch alarm to go off.
• Step 1: Find the alarm you’d like to set.
• Step 2: Select the threshold you want to add, then click Edit next to Thresholds.
• Step 3: Third, select the AWS region where your data is stored so that Amazon
can gauge the volume of data that satisfies this requirement.
34. What Types Of Cloudwatch Alarms Can Be Created?
Four types of Cloudwatch alarms can be created:
• A warning about a specific resource (e.g., a virtual machine).
• A regular notification for a specific metric (e.g., CPU usage).
• A user-defined alarm (for example, if your application runs slowly, the alarm will
trigger when the CPU reaches 80% and notify you immediately).
• A personalized alarm based on user-defined rules.
35. What Kinds Of Things Can I Do With Cloudwatch Logs?
Cloudwatch logs might help you determine why your program isn’t functioning as
intended. You can also use them to diagnose performance issues in your system.
Furthermore, Cloudwatch logs can be used to keep an eye on the status of your
infrastructure and spot problems before they affect performance.
36. What Log Monitoring Does Cloudwatch Provide?
CloudWatch Logs helps you display and troubleshoot your systems and applications
using your existing machine, software, and custom log files. CloudWatch Logs allows
you to monitor your logs in real time for specific phrases, values, or styles.
37. What Are Amazon Cloudwatch Logs?
Amazon CloudWatch Logs uses your existing machine, application, and custom log files
to reveal and troubleshoot your systems and programs. With CloudWatch Logs, you can
search your logs in near real-time for specific phrases, values, or patterns. For example,
you can set the alarm for the number of errors in your machine logs or view graphs of
net request latency from your utility logs. You can then examine the distinct log records
to determine the source of the problem. Log statistics can be stored and accessed
indefinitely in a long-lasting, low-cost garage, so you don’t have to worry about filling
up difficult drives.

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38. How Long Do Cloudwatch Logs Store My Data?
Your information will be kept in Cloudwatch Logs for up to 7 days. After that point, only
the most current logs will be kept, with older ones automatically deleted to save space.
39. How do you delete all log files from a specific group?
Using the AWS CloudWatch control panel, you can remove all logs for a particular group
at once. Select the log group you want to remove from the CloudWatch console, then
choose “Actions” from the context menu.
40. What is an AWS CloudWatch dashboard?
An AWS CloudWatch dashboard can visually show metrics and alarms for tracking your
AWS applications and resources. Data from AWS CloudWatch, Amazon EC2, Amazon
DynamoDB, Amazon RDS, and other AWS services can be shown in dashboards.
41. Does The Cloudwatch Logs Agent Support Team Roles?
Yes, IAM roles are supported by the Cloudwatch Logs Agent.
Your company’s log data can be available via the AWS IAM service and the Cloudwatch
Logs Agent. The AWS IAM service allows you to manage who can view which log
events and what permissions they have given you.
42. What Can I Measure With Amazon Cloudwatch Metrics?
With Amazon Cloudwatch Metrics, you may monitor the following:
• Utilization of Central Processing Units (how many CPU resources are used).
• Making Use of Memory (how much memory is being used).
• Disk I/O speed (the rate data passes through your discs in a second).
AWS CloudTrail Interview Questions
43. What is the AWS CloudWatch Agent?
The AWS CloudWatch Agent is software that can be deployed to any server, whether
hosted on Amazon EC2, Amazon ECS, or on-premises. Using the AWS CloudWatch
Agent, you can quickly gather and send system-level performance information from
specific AWS resources.
44. What Statistics Can I View And Graph In Cloudwatch?
CloudWatch lets you see and visualize numerous statistics. A few examples are as
follows:

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• Disk I/O Activity
• Memory Share
• CPU Usage
• Memory Usage
• Network Interface Usage.
45. How do I make use of my Cloudwatch logs?
Some of the many uses for CloudWatch logs include the following.
• Notify you of any SLA or quota breaches
• Maintain a close eye on crucial application and resource indicators.
• Check the status of your AWS infrastructure in one convenient location.
• Determine where your applications and services may have security holes and patch
them before the public discovers them.
46. If I disable monitoring for an Ec2 instance, will I lose the metrics data?
No, the metrics data will not be lost.
If you disable monitoring for an EC2 instance, the metrics you’ve collected are still safely
preserved in a SQL database as part of the AWS CloudTrail logs
47. What are the Applications of AWS?
• SaaS Hosting
• Website Hosting
• Search Engines
• Media Sharing
• Social Networking
• Academic Computing
• Social and Mobile Applications.
48. Is Amazon CloudWatch a SIEM?
Whereas a SIEM is primarily a security solution, AWS Cloudwatch is primarily a
monitoring and log analytics tool.
49. What is AWS SIEM called?
Organizations need comprehensive insight into their infrastructure and apps to quickly
make data-driven choices. For the AWS Control Tower, SIEM systems monitor
workloads in real-time, spot security concerns, and speed up the root-cause investigation.

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50. What is the AWS CloudWatch metric data retention period?
The time that AWS CloudWatch will keep your metric data once it has been collected
for you is known as the AWS CloudWatch metric data retention period. The user can
customize this duration.
AWS Cloud Watch MCQ Interview Questions
51. A solution architect is designing a new web application on AWS. To make the
application very popular, the architect focuses on software development and new
features without managing or provisioning instances. Which solution is best suited
for that?
A. AWS Lambda and Amazon CloudFront
B. AWS Lambda and Amazon API Gateway
C. Amazon EC2 and Amazon API gateway
D. Elastic Load Balancing with Amazon EC2 and Auto Scaling groups
Answer: B
52. You plan to design an application by encrypting all the data in an Amazon
Redshift cluster. How will you encrypt the data at rest?
A. Using the AWS KMS Default Customer master key
B. Placing the Redshift cluster in a private subnet
C. Encrypting the data using SSL/TLS
D. Encrypt the Amazon EBS volumes
Answer: A
53. An organization decides to build an Amazon Redshift cluster to host sensitive
data in their shared services VPC. What control does the organization implement
for networks accessing the cluster?
A. Providing access to networks that connect with share services through VPN.
B. Operating clusters in different VPCs and joining through VPC peering.
C. For users on the network, create a database user inside the Amazon Redshift cluster.
D. Defining a cluster security group for the cluster allowing access from the allowed
networks.

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Answer: D
54. An application saves the logs to an S3 bucket. A user needs to keep the logs for
one month for troubleshooting purposes and then clear the logs. What action will
enable this?
A. Configuring lifecycle configuration rules on the S3 bucket.
B. Creating an IAM policy for the S3 bucket.
C. Enabling CORS on the S3 bucket.
D. Adding a bucket policy on the S3 bucket.
Answer: A
55. A website experiences inconstant traffic, and the database cannot keep up with
the write requests during peak traffic times. What AWS Service helps to decouple
the web application from the database?
A. AWS Lambda
B. Amazon S3
C. Amazon EFS
D. Amazon SQS
Answer: D
Conclusion
AWS Cloud-Watch collects and reports metrics on various resources within your AWS
account. These data can be used to determine how your applications use resources. Based
on the AWS Cloudwatch real-world experience, this article will help you know the most
commonly asked AWS CloudWatch interview questions for your upcoming interview.
FAQ’S:
What is CloudWatch in AWS interview questions?
Amazon CloudWatch is a monitoring service for AWS resources and the applications
you run on AWS. You can use CloudWatch to collect and track metrics, collect and
monitor log files, and set alarms. CloudWatch can monitor AWS resources such as
Amazon EC2 instances and Amazon RDS DB instances, as well as custom metrics
generated by your applications and services, and any log files your applications generate.
Here are some example interview questions that might be asked about Amazon
CloudWatch:
What is Amazon CloudWatch used for?

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Can you explain how Amazon CloudWatch collects and tracks metrics?
How do you set up an alarm in Amazon CloudWatch?
How does Amazon CloudWatch integrate with other AWS services?
Can you explain how you would use CloudWatch Logs to monitor application logs?
How do you monitor custom metrics with CloudWatch?
How can you troubleshoot an issue using CloudWatch?
How can you export CloudWatch logs to other log management systems?
These are just a few examples of the types of questions you might be asked about
Amazon CloudWatch in an interview. It would be helpful to familiarize yourself with the
features and capabilities of the service and to have a few examples of how you have used
CloudWatch in the past (if possible).
What are 3 things you can do in CloudWatch?
Collect and Track Metrics: Amazon CloudWatch allows you to collect and track metrics
for your AWS resources, such as Amazon EC2 instances, Amazon RDS DB instances,
and Elastic Block Store (EBS) volumes. You can also use CloudWatch to collect custom
metrics generated by your applications and services.
Set Alarms: Amazon CloudWatch allows you to set alarms that can automatically react
to any threshold you specify. When an alarm is triggered, you can have CloudWatch send
notifications or automatically make changes to the resources being monitored. This can
help you proactively address potential issues.
Monitor Logs: Amazon CloudWatch allows you to monitor log files from your
applications and AWS resources. CloudWatch Logs lets you monitor, store, and access
your log files from Amazon EC2 instances, AWS CloudTrail, and other resources. This
allows you to troubleshoot issues more easily and perform analysis on your logs.
Those are some examples of what you can do with CloudWatch, but there are many other
things you can do depending on the use case, for example : 4. Custom Dashboards for
Visualizing Metrics and Logs
Event Management
Integration with other AWS Services like Lambda or SNS to automate actions based on
Alarm Triggers
CloudWatch Agent for real-time metric collection on on-premise instances.
CloudWatch Synthetics for monitoring of end-to-end experience of your application with
canaries and browser scripting And many more depending on the specific service and
use case you are trying to monitor and automate.
What is the use of CloudWatch in AWS?
Amazon CloudWatch is a monitoring service for AWS resources and the applications
that you run on AWS. It allows you to collect and track metrics, collect and monitor log
files, and set alarms. Some of the main uses of CloudWatch include:
Resource monitoring: CloudWatch allows you to monitor the performance and health of
your AWS resources, such as Amazon EC2 instances, Amazon RDS DB instances, and
Elastic Block Store (EBS) volumes.
Application monitoring: CloudWatch allows you to monitor the performance and health

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of your applications running on AWS, by collecting custom metrics from your
application and services.
Alarm management: CloudWatch allows you to set alarms that can automatically react
to any threshold you specify. When an alarm is triggered, you can have CloudWatch send
notifications or automatically make changes to the resources being monitored.
Logging: CloudWatch allows you to monitor log files from your applications and AWS
resources. CloudWatch Logs lets you monitor, store, and access your log files from
Amazon EC2 instances, AWS CloudTrail, and other resources. This allows you to
troubleshoot issues more easily and perform analysis on your logs.
Dashboard: Custom Dashboards to get a comprehensive view of all the metrics and logs
of your resources and applications, in a single place.
Automation : Using CloudWatch event and alarms, automate actions based on certain
triggers, like scaling up or down EC2 instances, or sending SNS notifications.
CloudWatch Agent for real-time metric collection on on-premise instances.
CloudWatch Synthetics for monitoring of end-to-end experience of your application with
canaries and browser scripting
The service is very useful for monitoring, troubleshooting and automation of your AWS
infrastructure and applications, allowing you to detect and fix issues quickly, and also
optimize cost and performance.
What are the 3 states of the CloudWatch metric alarm?
In Amazon CloudWatch, a metric alarm can have one of the following three states:
OK: This state indicates that the metric is within the specified thresholds. If an alarm is
in the OK state, no action is taken.
ALARM: This state indicates that the metric has breached one or more of the specified
thresholds. When an alarm is in the ALARM state, CloudWatch can take one or more
actions, such as sending a notification or taking an automated action.
INSUFFICIENT_DATA: This state indicates that CloudWatch has not received enough
data points to determine the alarm state. This state can occur if an alarm is created or
updated but the metric data is not yet available, or if the alarm has just been deleted.
Alarms are transitioned from OK to ALARM state and vice versa if the alarm’s threshold
is breached, if an alarm is deleted or if an alarm is updated.
CloudWatch Alarm is a powerful feature, that can help you to monitor your resources
and applications more effectively, proactively address potential issues, and automate
actions based on certain triggers. By combining with SNS, you can notify your teams,
on-call, or even send automated actions like scaling up instances. Alarms are an essential
part of your infrastructure and can save you time, money and prevent outages.