100+ Free Alibaba ACA Cloud Operator Practice Questions

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Question 1

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An ECS instance is unresponsive over SSH and the operator wants to recover it without losing data. Which Alibaba Cloud ECS console action should be tried first?

Release the instance

Use Send Remote Command via Cloud Assistant to run a diagnostic shell script

Reinstall the operating system from an image

Replace the system disk immediately

to track

2026 Statistics

Key Facts: Alibaba ACA Cloud Operator Exam

50 / 90 min

Questions / Time

Alibaba Cloud

80/100

Passing Score

Alibaba Cloud

$120

Exam Fee (USD)

Alibaba Cloud

2 years

Cert Validity

Alibaba Cloud

Online

Delivery Mode

Alibaba Cloud Academy

Associate

Tier

Alibaba Cloud

ACA Cloud Operator is Alibaba Cloud's associate-level operations exam: 50 questions in 90 minutes with a passing score of 80/100 and a US$120 fee. The certification is valid for 2 years and is delivered online through the Alibaba Cloud certification portal. Topic focus is on day-2 operations: ECS recovery, snapshots, custom images, CloudMonitor + SLS, OOS automation, HBR backup, RDS administration, OSS management, RAM/KMS security, and cost levers like Reserved Instances and Savings Plans.

Sample Alibaba ACA Cloud Operator Practice Questions

Try these sample questions to test your Alibaba ACA Cloud Operator exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1An ECS instance is unresponsive over SSH and the operator wants to recover it without losing data. Which Alibaba Cloud ECS console action should be tried first?

A.Release the instance

B.Use Send Remote Command via Cloud Assistant to run a diagnostic shell script

C.Reinstall the operating system from an image

D.Replace the system disk immediately

Explanation: Cloud Assistant runs commands on a running ECS instance without SSH using the guest agent, so an operator can collect logs, restart sshd, or check the network stack while preserving data on system and data disks.

2An operator needs to take a consistent snapshot of an ECS Linux instance running MySQL with active writes. Which approach gives the most application-consistent snapshot?

A.Take a normal snapshot of the system disk during peak load

B.Trigger an Application Consistent Snapshot using Cloud Assistant pre/post scripts to flush MySQL

C.Use ApsaraDB for RDS snapshot on the ECS instance

D.Detach the data disk before taking the snapshot

Explanation: Application-consistent snapshots use Cloud Assistant to run FLUSH TABLES WITH READ LOCK or freeze the filesystem before the snapshot and unfreeze after, producing a snapshot that is consistent at the application layer rather than only crash-consistent.

3An operator wants every ECS launched from a custom image to install the Cloud Monitor agent at first boot. Which mechanism is purpose-built for this?

A.A Function Compute trigger on the image

B.ECS user data with a cloud-init shell script

C.OOS template scheduled to run hourly

D.Manual SSH after boot

Explanation: ECS user data is executed by cloud-init on first boot and is the standard way to inject initialization scripts that install agents, configure SSH, or set hostnames.

4An operator needs to apply the same configuration change to 50 ECS instances tagged env=prod. Which is the most efficient batch operation?

A.SSH into each instance manually

B.Use Cloud Shell with the Alibaba Cloud CLI ecs run-command targeting the tag

C.Open 50 console tabs and use Send Remote Command on each

D.Create 50 OOS executions, one per instance

Explanation: The Alibaba Cloud CLI from Cloud Shell can target ECS instances by tag and call run-command (Cloud Assistant) to execute the same script across the entire fleet in a single API call.

5An operator forgets the root password on a Linux ECS instance. What is the recommended way to recover access via the console?

A.Release and recreate the instance

B.Use the ECS Reset Password feature, then restart the instance

C.Submit a support ticket and wait

D.Detach the system disk and edit /etc/shadow

Explanation: ECS Reset Password rewrites the OS credential through Cloud Assistant; it requires a restart on most images for the change to take effect, and it preserves data.

6An operator wants every new ECS in a tagged scaling group to keep the same disk performance during a system disk replacement. Which feature should they configure on the new system disk?

A.Encrypted disk only

B.ESSD with the same PL (performance level) and capacity

C.Standard SSD on a separate zone

D.ESSD AutoPL with capacity reduced

Explanation: ESSD performance is governed by capacity and the configured performance level (PL0 to PL3); to preserve IOPS/throughput after replacement, match capacity and PL.

7Which ECS console feature lets an operator create a custom image directly from a running instance for golden-image baking?

A.Snapshot of the system disk only

B.Create Custom Image from Instance (which snapshots all disks and packages them as an image)

C.Export the instance to OSS as a tar file

D.Image Builder Pipeline

Explanation: Create Custom Image from Instance captures system and data disk snapshots and bundles them into a reusable ECS image; this is the standard golden-image workflow.

8An ECS instance must be redeployed to fix an underlying host hardware issue without changing its IP. Which action should the operator take?

A.Stop the instance, then start it (which migrates it to a healthy host on next start)

B.Release the instance and recreate

C.Resize the instance to a different family

D.Change the security group

Explanation: Stop then Start triggers ECS to schedule the instance on a different physical host while keeping the instance ID, primary private IP, and disks intact, which is the standard host-evacuation workflow.

9Which CloudMonitor feature collects host-level CPU, memory, disk, and network metrics from inside the ECS guest OS?

A.Basic ECS monitoring (hypervisor-side)

B.CloudMonitor agent (host monitoring)

C.ActionTrail

D.Cloud Config

Explanation: Basic ECS monitoring exposes hypervisor-visible metrics (CPU, network, disk I/O) but cannot see memory or per-process detail; the CloudMonitor agent runs in the guest and reports memory, processes, and per-mountpoint disk usage.

10An operator wants CloudMonitor to alert when an ECS instance memory usage exceeds 85% for 3 consecutive 1-minute intervals. Which alarm rule field controls this behavior?

A.Statistic and Period only

B.Threshold, Comparison, and Trigger Conditions (consecutive periods)

C.Webhook URL

D.Effective Period

Explanation: CloudMonitor alarm rules combine a metric/statistic, a threshold and comparison operator, and a Trigger Condition that requires N consecutive periods at or beyond the threshold before the alarm fires; this avoids spiky false positives.

About the Alibaba ACA Cloud Operator Exam

The Alibaba Cloud Certified Associate (ACA) Cloud Operator credential validates day-to-day operations skills on Alibaba Cloud, including ECS lifecycle management (snapshots, custom images, password reset, host migration via stop/start, Cloud Assistant batch ops), CloudMonitor and Simple Log Service (SLS) for observability, Operation Orchestration Service (OOS) for runbooks and patching, Cloud Backup (HBR) for ECS/file/SQL Server/Oracle/SAP HANA backup, RAM identity, KMS, ActionTrail, Cloud Config compliance, ApsaraDB for RDS operations, OSS bucket management, and cost optimization with Reserved Instances, Savings Plans, Spot ECS, and lifecycle policies. The exam targets cloud operators with 6+ months of Alibaba Cloud hands-on experience.

Questions

50 scored questions

Time Limit

90 minutes

Passing Score

80/100

Exam Fee

$120 USD (Alibaba Cloud)

Alibaba ACA Cloud Operator Exam Content Outline

25%

ECS Day-2 Operations

Snapshots (incl. application-consistent), custom images, password reset, instance redeploy via stop/start, user-data with cloud-init, Cloud Assistant Send Remote Command, batch ops with Cloud Shell + CLI, ESSD performance levels, Auto Scaling self-healing

20%

Monitoring, Logging, and Observability

CloudMonitor host monitoring, custom metrics, alarm rules, alarm history, dashboards, contact groups; Simple Log Service (SLS) Projects/Logstores, Logtail JSON plugin, log shipping to OSS and MaxCompute, SLS Alert Center

15%

Automation and Orchestration

Operation Orchestration Service (OOS) YAML/Python templates, Patch Manager, approval steps, timer triggers, EventBridge → Function Compute event-driven ops, ROS for alarms-as-code

15%

Backup, Recovery, and DR

Hybrid Backup Recovery (HBR / Cloud Backup) for ECS, file, SQL Server, Oracle, SAP HANA Backint; snapshot policies, snapshot consistency groups, cross-region snapshot copy, GFS retention, restore jobs

15%

Security Operations and Compliance

RAM users/groups/roles, policy versions, MFA enforcement, acs:SourceIp condition, ActionTrail audit, KMS envelope encryption, SSL Certificates Service, Security Center, Cloud Config rules and remediation, Cloud SSO with Resource Directory

10%

Networking, ApsaraDB, OSS, and Cost

Security group/route table updates, EIP attach/detach, ALB/CLB HTTPS listeners, CEN Transit Router; RDS PITR, parameter templates, slow query log via DAS, read replicas; OSS lifecycle, versioning, CRR/SRR, WORM, image processing; Reserved Instances, Savings Plans, Spot ECS, right-sizing, OSS Cold Archive

How to Pass the Alibaba ACA Cloud Operator Exam

What You Need to Know

Passing score: 80/100
Exam length: 50 questions
Time limit: 90 minutes
Exam fee: $120 USD

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

Alibaba ACA Cloud Operator Study Tips from Top Performers

1Spin up a low-cost ECS and practice the full lifecycle: snapshot, custom image, stop/start (host evacuation), Reset Password, Send Remote Command, and release

2Configure a CloudMonitor alarm on memory >85% with 3 consecutive 1-minute periods and route it to a contact group to internalize alarm-rule mechanics

3Build a 3-step OOS template (RunCommand → CreateSnapshot → RebootInstance) and add an Approval action to feel the runbook gate pattern

4Practice SLS end-to-end: install Logtail with a JSON plugin, ship to OSS, and write a 1-minute SLS Alert on error count > 100

5Set up an HBR Cloud Backup plan with GFS retention (7 daily / 4 weekly / 12 monthly / 5 yearly) on a test ECS to learn the restore flow

6Practice the RAM patterns: groups for teams, roles for ECS, acs:SourceIp condition, MFA enforcement, policy versions for safe rollback

7Configure an OSS lifecycle policy that transitions to IA → Archive → Cold Archive and enable versioning to see delete markers

8Take 2-3 timed full-length practice exams under 90 minutes targeting 85%+ before scheduling

Frequently Asked Questions

What is the ACA Cloud Operator exam format?

The Alibaba Cloud Certified Associate (ACA) Cloud Operator exam has 50 questions, a 90-minute time limit, and a passing score of 80 out of 100. Questions are multiple choice and multiple response. The exam costs US$120 and is delivered online through the Alibaba Cloud certification portal. The certification is valid for 2 years.

Who should take ACA Cloud Operator?

Cloud operators, system administrators, DevOps engineers, and SRE candidates who run workloads on Alibaba Cloud. Alibaba Cloud recommends 6+ months of hands-on operations experience with ECS, CloudMonitor, SLS, OOS, RAM, and Cloud Backup before sitting the exam.

How does ACA Cloud Operator differ from ACA Cloud Computing?

ACA Cloud Computing focuses on understanding the core services (ECS, VPC, RDS, OSS) and is broader and more conceptual. ACA Cloud Operator focuses on operating and maintaining those services in production: snapshots and custom images, CloudMonitor alarms and SLS log analysis, OOS runbooks and patching, HBR backups, RAM and KMS hygiene, and cost optimization.

What is the next step after ACA Cloud Operator?

Most candidates progress to ACP Cloud Computing (Alibaba Cloud Certified Professional) for deeper architecture and operations, or to ACP Cloud Security or ACP Big Data depending on specialization. The Cloud Operator track maps cleanly into the ACP Cloud Computing curriculum.

What services should I focus on most for this exam?

Spend the most time on ECS day-2 operations (snapshots, custom images, Cloud Assistant, user-data, instance redeploy via stop/start), CloudMonitor (alarm rules with consecutive periods, custom metrics, contact groups), SLS (Projects/Logstores, Logtail, log shipping), OOS (templates, Patch Manager, approval steps, timer triggers), and HBR (Cloud Backup) for ECS/file/SQL/Oracle/SAP HANA. RAM, KMS, ActionTrail, and Cloud Config round out security operations.

Is the exam available in English?

Yes. Alibaba Cloud offers the ACA Cloud Operator exam in both English and Simplified Chinese through the Alibaba Cloud Academy / certification portal. Online proctored delivery is the standard format.

How long should I study for ACA Cloud Operator?

Most candidates with prior cloud operations experience need 4-6 weeks at 6-8 hours per week (about 30-50 hours). Hands-on practice in an Alibaba Cloud account is essential: take snapshots, build custom images, configure Logtail, write a small OOS template, and configure HBR backup plans. Aim for 85%+ on full-length practice exams before scheduling.