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A developer accesses logs in a Log Service Logstore via the API. The error code returned by the server is 404. Which of these could be the cause?

A.

The log project (Project) does not exist

B.

The requested digital signature does not match

C.

Server internal error

D.

Server is busy: please try later

When versioning is enabled for an OSS Bucket, previous versions of objects will be retained, using storage space and incurring additional costs. How can you save space and reduce costs, while retaining some of the benefits of object versioning?

A.

Avoid using version management.

B.

Use the Function Compute Service to regularly check for and delete old versions of objects.

C Use OSS s built in lifecycle management capabilities to automatically delete old versions of objects after a set time.

C.

Use OSS's built in lifecycle management capabilities to move old versions of objects to Archival Storage.

A developer have written a web application using a microservice architecture, in such a architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain consist of?

A.

3

B.

4

C.

5

D.

6

Which of the following descriptions of Alibaba Cloud ECS storage are correct? (Number of correct answers: 3)

A.

Alibaba Cloud provides a wealth of block storage products for ECS, including Cloud Disks (virtualized storage) and Local Disks (physically attached to the server(s) that host your ECS Instances).

B.

Both Local Disks and Cloud Disks use a multi-copy distributed storage mechanism, which has low latency, high performance, durability, and high reliability, and supports creation, expansion and release at any time.

C.

Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State ) Cloud Disks, and high-efficiency Cloud Disks.

D.

Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system.

Which of the following OSS tools are GUI-based? (Number of correct answers:2)

A.

Web Console

B.

ossf s

C.

ossbrowser

D.

ossutil

The event monitoring feature in CIoudMonitor provides custom event monitoring functions. Which of the following data reporting methods are included? (Number of correct answers: 3)

A.

Report event monitoring through the Python SDK

B.

Report event monitoring through the Java SDK

C.

Report event monitoring data via HTTP

D.

Report event monitoring data through the command line (CU)

What are the required parameters for the Python SDK to create a client to access Alibaba Cloud's API? (Number of correct answers: 3)

A.

access.keyjd

B.

access.key.secret

C.

regionjd

D.

zone jd

E.

vpcjd

Which of the following options describes the basic concepts of Alibaba Cloud Tracing Analysis correctly? (Number of correct answers: 3)

A.

Alibaba Cloud Tracing Analysis model relies on OpenTracing

B.

In the OpenTracing standard, a call chain can be regarded as a directed acyclic graph (DAG) composed of multiple Spans. The relationship between spans is named References

C.

In the OpenTracing standard, each Span represents a named and timed non-continuous execution segment in the call chain

D.

In some cases, timing diagrams based on the timeline are used to show the call chain

You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)

A.

Event Notifications can cross regions.

B.

Message Service provides synchronous notifications to ensure the consistency between the message acknowledgment and event processing.

C.

The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retried based on the specified retry policy.

D.

The consumer type of the event notification message can be HTTP Server, Queue, or Topic.

Alibaba Cloud Log Service is a Pay-As-You-Go service. The billing unit is 7 day, and the configuration can be adjusted at any time: fees are charged according to actual usage. Which of the following are the main charges for Log Service? (Number of correct answers: 3)

A.

Read and write traffic

B.

Storage capacity

C.

Index traffic after index configuration

D.

Query analysis