Microservices Monitoring, Logging, and Tracing 2

Question 1

In distributed tracing, what does a 'span' represent?

Accepted Answer

A single unit of work or operation within a request's journey

Answer

The total memory used by a service

Answer

A network firewall rule

Answer

A database backup window

Question 2

Which header is commonly propagated to correlate spans across services in W3C Trace Context?

Accepted Answer

traceparent

Answer

Authorization

Answer

Content-Type

Answer

Cache-Control

Question 3

What is the primary purpose of a correlation ID in microservices logging?

Accepted Answer

To link all log entries belonging to a single request across services

Answer

To encrypt log files at rest

Answer

To compress logs before storage

Answer

To rotate log files daily

Question 4

Which logging approach is most suitable for machine parsing and aggregation in microservices?

Accepted Answer

Structured logging in JSON format

Answer

Free-text plain logs only

Answer

Logging only to local console

Answer

Binary memory dumps

Question 5

In the RED method for monitoring services, what do R, E, and D stand for?

Accepted Answer

Rate, Errors, Duration

Answer

Read, Edit, Delete

Answer

Requests, Endpoints, Data

Answer

Resource, Event, Dependency

Question 6

What is a key benefit of centralized log aggregation (e.g., ELK or Loki)?

Accepted Answer

Searching and analyzing logs from all services in one place

Answer

Eliminating the need for any monitoring

Answer

Reducing the number of microservices

Answer

Replacing all databases

Question 7

Which open standard provides a vendor-neutral set of APIs for traces, metrics, and logs?

Accepted Answer

OpenTelemetry

Answer

OAuth2

Answer

GraphQL

Answer

gRPC