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| Section | Weight | Objectives |
|---|---|---|
| Enterprise Application Architectures and Cloud Technologies | 5% | - Evolution of enterprise application architectures - Cloud service models and deployment models - Core characteristics and value of cloud computing |
| Cloud-based Architecture Design of Conventional Applications | 50% | - Cloud resource planning and design principles
- Security architecture design on cloud
|
| HUAWEI CLOUD Innovations and Solutions | 5% | - Huawei Cloud ecosystem and tools - Emerging technologies integration (AI, Big Data, IoT) - Industry solutions and best practices |
| Cloud Native Application Architecture Design | 30% | - Cloud native concepts and technologies - Container and orchestration technology - Serverless architecture design and application scenarios - Microservice architecture design and practice
|
| HUAWEI CLOUD O&M Solution | 10% | - Automated operation and maintenance - Cloud monitoring and alerting system - Log management and analysis - Fault diagnosis and recovery mechanism |
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NEW QUESTION # 18
Web Application Firewall (WAF) can thoroughly inspect and protect service applications, intelligently recognize malicious request characteristics, and defend against unknown threats. Which of the following statements about WAF functions are correct?
Answer: B,D
Explanation:
"WAF supports three deployment modes: Cloud Mode - CNAME, Cloud Mode - Load balancer, and Dedicated Mode."
"WAF and CFW are different products provided by Huawei Cloud. WAF is used to protect your web services, while CFW is used to protect Internet border and VPC border traffic."
[WebSocket and SSE default support are established by current official Huawei WAF product documentation rather than this slide. ] Huawei source: Training PDF pp. 367, 369; official WAF protocol documentation Technical Deep Dive Huawei's V3.5 WAF chapter identifies three deployment modes: cloud mode with CNAME access, cloud mode through a load balancer and dedicated mode. Therefore option A is correct. These approaches differ in protected object, traffic path, billing and infrastructure integration. WAF protects HTTP/HTTPS web applications against malicious requests, including SQL injection, cross-site scripting and related application- layer attacks.
Option B is incorrect because network border protection belongs primarily to Cloud Firewall (CFW), while domain ICP filing is a separate regulatory or website-compliance process. Option C is incorrect because WAF is not a general-purpose Layer 2 Ethernet or Layer 4 arbitrary TCP/UDP firewall. Network protection and application security products have distinct responsibilities and inspection layers.
Option D is correct according to the relevant official Huawei WAF product documentation: WebSocket and Server-Sent Events are supported and enabled by default in the stated service behavior. WebSocket carries bidirectional messaging over an upgraded HTTP connection; SSE allows server-to-client event delivery.
Support for forwarding a protocol should not be treated as evidence that all its payloads undergo identical deep inspection to ordinary HTTP requests; the product documentation qualifies WebSocket inspection behavior.
In production, a design should choose WAF mode according to the origin location, traffic volume, performance requirements and acceptable configuration changes. Origin access should be restricted to avoid bypassing the protection point. WAF does not replace CFW, API authentication or application security testing. The two supported choices are A and D.
NEW QUESTION # 19
A Kubernetes cluster is made up of master nodes and worker nodes. A master node manages the whole cluster. Which of the following components run on a master node?
Select all that apply.
Answer: A,B
Explanation:
"A master node is the machine where the control plane components run, including API server, scheduler, controller manager, and etcd. In a production environment, multiple master nodes are deployed to ensure high cluster availability."
"A worker node is a compute node for running containerized applications in a cluster. Kubelet, kube-proxy, and container runtime are running on each worker node." Huawei source: Training PDF p. 415 Technical Deep Dive Huawei's Kubernetes architecture places the API server, scheduler, controller manager and etcd in the control plane. Option A is correct because kube-apiserver exposes the Kubernetes API and receives administrative and controller requests. Option D is correct because the scheduler chooses suitable nodes for pending pods based on available capacity and scheduling constraints.
Option B , Docker, is not a Kubernetes control-plane component. Docker is a container platform/runtime technology. Modern Kubernetes typically uses a compatible container runtime such as containerd, and the runtime is associated with workload execution rather than the API/scheduling control functions. Option C , kubelet, is primarily described by Huawei's diagram as a worker-node agent that manages containers and pods according to control-plane instructions.
There is a technical ambiguity: real Kubernetes control-plane hosts can also run kubelet to manage static pods and other node-local components. Therefore it would be inaccurate to claim kubelet never runs on a master.
The examination should ask which are control-plane components instead of which components merely run on a master host. Production Kubernetes commonly uses multiple control-plane nodes to avoid a single point of management failure, though application availability also depends on workers and data services. Useful validation commands include kubectl get nodes -o wide, kubectl cluster-info and kubectl get pods -n kube- system. Under the course's architectural classification, A and D are the defensible answers.
Technical commands / calculations from the reviewed batch
kubectl get nodes -o wide
kubectl get pods -n kube-system
kubectl cluster-info
NEW QUESTION # 20
A Dockerfile is a script used to configure Docker images. It contains instructions that can be executed independently. When the docker build command runs, the Docker engine executes these instructions in sequence. If an error occurs while an instruction is executed, the Docker engine skips that instruction and proceeds with the following ones. You only need to fix the instruction that reports an error. This greatly reduces O & M costs.
Answer: B
Explanation:
"A Dockerfile is a simple text file that contains a script of instructions for building a Docker image. Each instruction corresponds to a command a user could call on the command line, and each instruction produces a new image layer. When the docker build command is executed, the Docker engine executes the instructions in order to assemble a final, runnable image."
[Lab Guide] docker build -t httpd2:v1 .
Huawei source: Training PDF p. 410; Lab Guide p. 244
Technical Deep Dive
Dockerfile instructions are executed in order during a Docker image build. An instruction may produce filesystem changes or metadata for a new image layer, and later instructions may depend on earlier steps. The false assertion in the question is that Docker automatically skips an instruction that fails and continues building the rest of the image. Normal Docker build behavior is to stop when a required instruction fails.
For example, a Dockerfile containing FROM alpine, followed by RUN false and then RUN echo 'completed', will fail at RUN false because the command returns a nonzero status. The final echo statement is not run as though the failure were harmless. Developers must diagnose the cause, correct the Dockerfile or its dependencies, and rebuild the image. The Huawei Lab Guide illustrates building an Apache HTTP image from a Dockerfile using docker build -t httpd2:v1 . and does not describe silent skipping of failed instructions.
Docker layer caching may allow successful earlier build stages to be reused during a subsequent execution.
That reduces rebuild time, but it does not change the error-handling semantics. A reliable CI/CD pipeline should validate Dockerfile syntax, dependency resolution, build exit codes and the vulnerability state of the resulting image. Build stages should use deterministic versions and avoid introducing unnecessary secrets into image layers. The statement is therefore FALSE, option B; it overstates convenience and gives a fundamentally incorrect build-failure model.
Technical commands / calculations from the reviewed batch
FROM alpine:3.20
RUN echo 'Starting build'
RUN false
RUN echo 'Build completed'
# Build terminates at RUN false.
NEW QUESTION # 21
Database availability can be improved by using backups. Which of the following statements about database backups is false?
Answer: A
Explanation:
"By execution mode: automated backups (generated automatically based on backup policies) and manual backups (triggered by users)."
"By backup region: same-region backups (stored in the same region) and cross-region backups (stored in regions other than the current region)."
"By data volume: full backups and incremental backups."
Huawei source: Training PDF p. 289
Technical Deep Dive
Huawei V3.5 classifies database backups along three dimensions: execution mode, backup region and included data volume. Option B is true because same-region backups are stored in the source database's region, while cross-region copies are stored in a different region. Option C is true because backups can be automated under configured policies or initiated manually by an administrator. Option D is true because a full backup captures all selected data at a point in time while an incremental backup captures changes since a previous backup.
Option A is false according to the classification stated in the course. Relational and non-relational identify database data models, not a backup-method classification. A relational database and a document database may each have backups, but this does not transform relational/non-relational into a named backup execution or storage class.
Backups help recovery after accidental deletion, corruption and some types of attack. Their usefulness depends on retention periods, recovery testing, encryption, access controls and an appropriately chosen backup frequency. Incremental recovery may depend on a complete chain of prior backups; manual backups may have different retention rules from automatic backups. An important architectural distinction is that backups are not equivalent to continuous high availability: a standby replica can help preserve service during a node failure, whereas a backup is used to restore a prior data state. Production designs should define RPO and RTO, recovery steps and regional resilience. Therefore A is uniquely false under Huawei's V3.5 backup taxonomy.
NEW QUESTION # 22
After a company migrates its workloads to the cloud, multiple cloud servers in a virtual private cloud (VPC) need Internet access. However, the EIPs associated with the cloud servers might be attacked. An engineer suggests adding multiple EIPs when configuring DNAT rules. If one EIP is attacked, the other EIPs can continue to provide services and keep operations running normally.
Answer: B
Explanation:
"SNAT translates private IP addresses into EIPs, allowing traffic from a private network to go out to the Internet."
[Related section] DNAT maps an incoming EIP/port to a destination server; multiple EIPs in an SNAT rule are the documented outbound availability option.
Huawei source: Training PDF pp. 169-171; official NAT guidance
Technical Deep Dive
The scenario describes private ECSs requiring outbound Internet access, which is a Source Network Address Translation (SNAT) problem. Huawei NAT gateways can use one or more EIPs in supported SNAT configurations. If a particular public address is blocked or attacked, alternative EIPs may preserve outbound connectivity, subject to service behavior and security controls. DNAT has a different purpose: it maps incoming traffic targeting a public EIP and port to a specified private server and port.
The statement explicitly recommends configuring multiple EIPs in DNAT rules as the documented availability strategy for general outbound access, so it is FALSE. The relevant documented technique is configuring multiple EIPs in SNAT rules. It is important not to infer that attaching more EIPs to DNAT automatically provides seamless inbound service failover. Incoming clients must use an address and port that resolve and route to an available service endpoint, and DNAT port mapping has its own uniqueness constraints.
For Internet-facing applications, robust availability may require ELB, health checks, DNS failover, DDoS protection and redundant backends. For outbound access, NAT gateway EIP pools, route correctness and the limits of the gateway should be monitored. Architects should also assess whether an EIP block is due to anti- DDoS blackholing; multiple EIPs are not a substitute for an appropriate traffic-mitigation service. The question intentionally uses DNAT where SNAT is needed, making B correct.
NEW QUESTION # 23
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