Free Alibaba CEA-C01 Practice Test Questions and Answers (2026)

Enhanced SSDs (ESSDs) deliver the highest storage performance among ECS block storage options. Built on Alibaba Cloud's PL (Performance Level) architecture using NVMe and RDMA network infrastructure, ESSDs provide ultra-low latency, up to 1,000,000 IOPS, and maximum throughput of 4,000 MB/s per disk.

A. Hard Disk Drives (HDDs) offer basic, low-cost block storage with significantly lower IOPS and higher latency compared to ESSDs.

B. Standard SSD cloud disks provide reliable performance, but their maximum IOPS and throughput caps are substantially lower than ESSD performance levels.

D. Network Attached Storage (NAS) is a shared network file system (NFS/SMB protocol), not a high-performance block storage disk category for ECS.

- Alibaba Cloud Documentation: ECS Block Storage Performance Metrics, Section "ESSD Performance Levels" (Doc ID: ecs-disk-essd-perf)

- Alibaba Cloud Documentation: Disk Categories and Specifications, Section "Enhanced SSD (ESSD)" (Doc ID: ecs-disk-categories)

Alibaba Cloud Elastic Compute Service (ECS) is an Infrastructure-as-a-Service (IaaS) solution providing scalable, high-performance virtual machines (instances). ECS allows users to scale compute capacity—such as CPU, memory, and disk space—on demand to accommodate changing workloads.

A: OSS (Object Storage Service) is an object storage solution designed for unstructured data, not a virtual machine service.

C: RDS (Relational Database Service) is an automated relational database management service, not a general-purpose virtual machine provider.

D: CDN (Content Delivery Network) is a content acceleration service using edge nodes, not a scalable virtual machine service.

- Alibaba Cloud ECS Product Documentation, "What is Elastic Compute Service?", Section: Overview. https://www.alibabacloud.com/help/en/ecs/product-overview/what-is-ecs

Alibaba Cloud Object Storage Service (OSS) is an encrypted, secure, cost-effective, and highly reliable cloud storage service. It allows users to store and retrieve large volumes of unstructured data (objects) over the network from anywhere via HTTP/HTTPS APIs, supporting massive scalability and lifecycle management.

A. Elastic Compute Service (ECS) provides virtual computing servers and block storage rather than object storage capabilities.

C. ApsaraDB RDS (Relational Database Service) is a managed relational database service for structured data, not an object storage service.

D. Content Delivery Network (CDN) is used to cache and accelerate content distribution to end-users, relying on origin storage like OSS rather than serving as object storage itself.

- Alibaba Cloud Official Documentation, "What is Object Storage Service?", Product Overview / OSS Documentation. https://www.alibabacloud.com/help/en/oss/product-overview/what-is-oss

- Alibaba Cloud Academy Certification Courseware: ACA Cloud Computing Certification, Module: Storage Services (OSS).

A security group functions as a virtual stateful firewall for Elastic Compute Service (ECS) instances. It allows administrators to define inbound (ingress) and outbound (egress) network security rules to control access at the network interface level.

A. Billing management is handled by the Alibaba Cloud Expense Center and Billing Console, not network security groups.

C. Data storage is provided by storage services like cloud disks, Object Storage Service (OSS), or NAS.

D. Log monitoring and collection are managed by CloudMonitor and Simple Log Service (SLS), not security group firewall rules.

- Alibaba Cloud Documentation: Elastic Compute Service User Guide, Section "Overview of Security Groups" (Doc ID: ecs-sg-overview)

- Alibaba Cloud Documentation: VPC Security Architecture Guide, Section "Security Groups and Network ACLs" (Doc ID: vpc-sec-arch)

ApsaraDB for RDS High Availability (HA) edition provides data redundancy through continuous data replication between a primary instance and a secondary (standby) instance across distinct host hardware or Availability Zones. This real-time or near-real-time data synchronization ensures minimal data loss and automatic failover, establishing continuous operational data redundancy.

Option A: Backup is a point-in-time recovery mechanism rather than continuous active data redundancy across server nodes.

Option C: Scaling adjusts compute and storage capacity resources dynamically but does not provide architectural data replication or redundancy.

Option D: Snapshot creates static point-in-time disk images for disaster recovery rather than live operational data redundancy.

- Alibaba Cloud Documentation, "ApsaraDB for RDS High-Availability Edition Overview", Section: Architecture and Replication Mechanisms, Doc ID: rdshaoverview01.

- Alibaba Cloud Documentation, "ApsaraDB for RDS Data Security and High Availability Whitepaper", Section 2: Active-Standby Redundancy.

Alibaba Cloud SSL Certificates Service (Certificate Management Service) provides centralized provisioning, purchasing, deployment, and management of SSL/TLS certificates to secure network communications and enable HTTPS across Alibaba Cloud resources.

A. RAM manages user identities, roles, and access permissions for cloud resources, not digital SSL/TLS certificates.

C. OSS is an object storage service designed for storing unstructured file data, not managing digital certificates.

D. ECS provides compute virtual instances; while certificates can be installed on applications running in ECS, ECS itself is not a certificate management service.

- Alibaba Cloud Documentation, Certificate Management Service, "What is SSL Certificates Service?", Section: "Product Overview", Doc ID: cas/latest/what-is-cas.

Alibaba Cloud CloudMonitor offers real-time monitoring and alerting across cloud resources and applications. By continuously tracking performance metrics and automatically triggering alert rules or event notifications, CloudMonitor enables operations teams to immediately detect operational anomalies and rapidly resolve incidents before they escalate or degrade service availability.

B: CloudMonitor provides real-time metrics and instant alerts alongside historical data analysis, not exclusively historical context.

C: CloudMonitor automates metrics collection and alerting, eliminating time-consuming manual health checks.

D: Real-time alerting accelerates incident detection and response time, rather than slowing down reactions.

- Alibaba Cloud CloudMonitor Documentation, "Product Overview - What is CloudMonitor?", Section: Core Features. https://www.alibabacloud.com/help/en/cloudmonitor/latest/what-is-cloudmonitor

Elastic Container Instance (ECI) is an agile and immutable serverless container instance service provided by Alibaba Cloud. It enables users to run containers directly without provisioning, managing, or scaling underlying Virtual Machines or ECS servers.

B. ECS requires users to manage virtual servers, operating system updates, and compute infrastructure capacity.

C. RDS is a managed relational database service, not a serverless container execution environment.

D. OSS is a cloud object storage service for storing static files, not executing containerized workloads.

1. Alibaba Cloud Documentation - Elastic Container Instance (ECI) Overview, Section: "What is Elastic Container Instance".

2. Alibaba Cloud Documentation - Serverless Container Infrastructure, Section: "ECI Architecture and Core Features".

Alibaba Cloud Simple Log Service (SLS) is a complete, real-time log data processing engine. SLS provides end-to-end capabilities including automated log collection, transformation, indexing, querying, real-time analysis, visualization, and alerting across infrastructure, applications, and cloud services.

A. CloudMonitor focuses on infrastructure metric monitoring, health status, and resource alerts rather than real-time log ingestion, querying, and full lifecycle log analysis.

C. RAM is an access management service for user permissions and identity policies, not a logging and data analytics platform.

D. OSS is an object storage service suitable for long-term file archiving, but lacks built-in real-time log ingestion and interactive log query/analysis capabilities.

- Alibaba Cloud Official Documentation, "What is Simple Log Service?", SLS Product Overview. https://www.alibabacloud.com/help/en/sls/product-overview/what-is-sls

- Alibaba Cloud Documentation, "Log Collection and Real-time Querying", Simple Log Service Developer Guide.

Alibaba Cloud Server Load Balancer (SLB) distributes incoming application traffic across multiple backend Elastic Compute Service (ECS) instances. SLB supports Layer 4 (TCP/UDP) and Layer 7 (HTTP/HTTPS) load balancing protocols, allowing SSL offloading, certificate management, and secure HTTPS traffic distribution to maintain high availability and fault tolerance for web applications.

Option B: Object Storage Service (OSS) is an encrypted object storage service for unstructured data, not a load balancing service.

Option C: ApsaraDB for RDS is a managed relational database service and does not manage or balance incoming HTTPS web traffic.

Option D: Elastic Compute Service (ECS) provides virtual compute nodes that host applications, but does not natively distribute external network load across multiple instances.

- Alibaba Cloud Documentation, "Server Load Balancer (SLB) Product Overview", Section: Features - Layer 7 Load Balancing (HTTPS support), Doc ID: slboverview01.

- Alibaba Cloud Documentation, "ALB/CLB HTTPS Listener Configuration Guide", Section: SSL Certificate Management and Offloading.