Practice Test

True or False: Distributed tracing helps in understanding the flow of data and execution of applications.

  • True
  • False

Answer: True

Explanation: Distributed tracing allows you to trace all requests from their source down to their lowest level of detail. This helps identify bottlenecks and pain points in your software system.

What is the primary purpose of AWS X-Ray?

  • a) Server virtualization
  • b) Managed database service
  • c) Error reporting
  • d) Distributed request tracing

Answer: d) Distributed request tracing

Explanation: AWS X-Ray is a service that gathers data about requests that your application serves, and provides tools you can use to view, filter, and gain insights into that data to identify issues and opportunities for optimization.

Can distributed tracing and AWS X-Ray be used together to monitor and troubleshoot applications and microservices?

  • a) Yes
  • b) No

Answer: a) Yes

Explanation: AWS X-Ray is a service that provides distributed tracing, helping developers analyze and debug production, distributed applications, such as those built using a microservices architecture.

True or False: AWS X-Ray only supports applications running on AWS.

  • True
  • False

Answer: False

Explanation: AWS X-Ray can support applications running both on AWS and on-premises. It provides an end-to-end view of requests as they travel through the application, and shows a map of the application’s underlying components.

Which AWS service helps you in analyzing and debugging your distributed microservices applications?

  • a) Amazon CloudFront
  • b) Amazon API Gateway
  • c) AWS X-Ray
  • d) Amazon Elasticsearch Service

Answer: c) AWS X-Ray

Explanation: AWS X-Ray helps developers analyze and debug distributed applications, such as those built using a microservices architecture.

Which of the following languages are supported by AWS X-Ray SDKs? (Multiple select)

  • a) Python
  • b) Java
  • c) Ruby
  • d) Swift

Answer: a) Python, b) Java, c) Ruby

Explanation: The AWS X-Ray SDKs currently support Java, .NET, Node.js, Python, Ruby, and Go.

True or False : Distributed tracing mainly focuses on tracing processing within a single request.

  • True
  • False

Answer: False

Explanation: Distributed tracing is designed to enable tracking requests as they propagate across multiple services, not just within a single service.

Is it true that distributed tracing allows individuals to monitor applications on a single machine only?

  • a) Yes
  • b) No

Answer: b) No

Explanation: Distributed tracing allows monitoring of applications across multiple machines, providing helpful insights into larger, complex systems.

Which AWS service allows you to collect, filter, and analyze APi call logs for AWS services?

  • a) AWS X-Ray
  • b) AWS Lambda
  • c) Amazon CloudTrail
  • d) Amazon CloudWatch

Answer: c) Amazon CloudTrail

Explanation: Amazon CloudTrail allows you to log, continuously monitor, and retain account activity related to actions across your AWS infrastructure.

True or False: AWS X-Ray supports tracing of SQL queries in your application.

  • True
  • False

Answer: True

Explanation: AWS X-Ray provides insights into SQL queries within your application by recording the SQL query in the X-Ray trace.

Interview Questions

What is distributed tracing in AWS?

Distributed tracing in AWS enables developers to analyze and debug their microservices applications by tracking each request made to these applications and recording detailed data about these requests like latency, state, CPU usage, etc.

Which AWS service is primarily used for distributed tracing?

AWS X-Ray is primarily used for distributed tracing for applications running in AWS.

Can you use AWS X-Ray with any AWS service?

You can use AWS X-Ray with any service that is integrated with it, for example, AWS Lambda, Amazon EC2, Amazon ECS, and many others.

What component of AWS X-Ray collects data and sends it to the X-Ray service?

The X-Ray SDK is the component that collects data and sends it to the X-Ray service.

What is a trace in AWS X-Ray?

In AWS X-Ray, a trace is a set of segment documents that provides a detailed map of the entire path that a request takes through an application.

What is a segment in AWS X-Ray?

A segment in AWS X-Ray provides the resource-level view of work done and includes details about the work, including start time, end time, and subsegments.

Can you use AWS X-Ray with applications that do not run on AWS?

Yes, you can use AWS X-Ray with applications that do not run on AWS.

What is a service graph in AWS X-Ray?

A service graph is a visual representation of your application showing the relationship between all its components.

Do you need to modify your code to trace requests in AWS X-Ray?

Yes, to trace requests to and from your application, you need to modify your code to include the AWS X-Ray SDK.

What is a subsegment in AWS X-Ray?

In AWS X-Ray, a subsegment provides more granular timing information and details about downstream calls, retries, and nested calls that your application makes.

How can one use sampling rules in AWS X-Ray?

Sampling rules in AWS X-Ray can be used to modify the amount of data that is collected by choosing which requests to trace.

Can AWS X-Ray trace SQL queries?

Yes, AWS X-Ray can trace SQL queries. The X-Ray SDK for Java can record SQL queries in subsegments as part of the segment data.

What do annotations in AWS X-Ray do?

Annotations in AWS X-Ray provide a way to add indexed metadata to a trace, allowing you to filter or group the traced requests based on the custom criteria.

What’s the maximum number of annotations and metadata that can be attached to an AWS X-Ray trace?

An AWS X-Ray trace can hold up to 50 annotations and metadata.

What are some data sources that can be included in AWS X-Ray tracing?

AWS X-Ray tracing can include data sources such as request and response data, HTTP method, user agent, and URL path, among others.

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