50 IBM A1000-123 Practice Questions: Question Bank 2025

A team is new to IBM Cloud and needs to understand the hierarchy used to organize resources for billing, access control, and isolation. Which structure best represents IBM Cloud's resource organization model?

A developer wants to deploy an application without managing servers and expects the platform to automatically scale based on demand. Which IBM Cloud compute option best fits this requirement?

A company wants to securely store application secrets (API keys, passwords, certificates) and tightly control access via IAM. Which IBM Cloud service is the most appropriate?

An application team reports intermittent failures when calling an IBM Cloud service API. You need request/response visibility and centralized logs to correlate errors across components. What is the best first step?

A microservices application must run in containers, support rolling updates, and provide service discovery. Which IBM Cloud approach best meets these needs with the least custom orchestration work?

A company must ensure developers can deploy resources only into a specific resource group and cannot create IAM policies. Which access control approach best satisfies this requirement?

A workload running on IBM Cloud Virtual Servers for VPC must access a database privately without traversing the public internet. Which design is the best practice?

A team notices increased response times after a new release. They want to identify whether latency comes from the application code, downstream services, or network calls. Which monitoring capability is most appropriate?

A regulated enterprise requires that encryption keys be protected so that cloud operators cannot access key material, and that cryptographic operations occur inside tamper-resistant hardware. Which IBM Cloud capability best meets this requirement?

A production environment experiences a sudden spike in outbound traffic and costs. You suspect a misconfigured service is making excessive external calls. What is the most effective approach to identify and contain the issue while maintaining operational best practices?

A developer is building a cloud-native app on IBM Cloud and wants to package the app and all dependencies in a portable unit that can run consistently across environments. Which approach best meets this requirement?

A team needs to run a short-lived batch job in IBM Cloud that processes messages from a queue and exits when complete. They want minimal cluster management overhead. Which implementation approach is most appropriate?

An IBM Cloud account owner wants to ensure that administrators can manage infrastructure but cannot read application secrets. Which practice best supports this goal?

A microservices application is deployed across multiple regions in IBM Cloud for resiliency. Users report intermittent latency spikes. The team wants to determine whether spikes correlate to a specific region and service dependency. What is the BEST monitoring approach?

A company wants to enforce that only approved container images can be deployed to production in IBM Cloud Kubernetes-based environments. Which control is most appropriate?

A team is provisioning IBM Cloud resources using Infrastructure as Code (IaC). They notice that repeated runs sometimes overwrite manual changes made in the console. What is the BEST practice to avoid configuration drift and unexpected changes?

A security engineer must demonstrate that access to sensitive IBM Cloud resources is auditable and can be reviewed for compliance. Which capability best supports this requirement?

A web application hosted in IBM Cloud experiences periodic CPU saturation on its compute instances, but memory remains stable. The team wants to reduce cost while maintaining performance during peak demand. What is the BEST optimization strategy?

A regulated enterprise must ensure that encryption keys used for sensitive data are controlled by the organization, rotated, and access is tightly governed. Which approach is MOST appropriate?

A company runs multiple microservices where one critical service occasionally slows down, causing cascading timeouts across other services. They want to improve resiliency and user experience without rewriting all services. Which design pattern is MOST appropriate to implement first?

A developer is new to IBM Cloud and wants a quick way to understand what IBM Cloud Resources exist in their account and how they are organized for billing and access control. Which concept best explains this organization?

A team needs to provision IBM Cloud infrastructure and services consistently across development, test, and production environments. They also want repeatable deployments and peer review via source control. What is the recommended approach?

A security reviewer asks how IBM Cloud ensures that only authorized users can manage a specific service instance (for example, a database) without giving them broader permissions in the account. What should you configure?

A web application running on IBM Cloud experiences intermittent timeouts, but only during traffic spikes. The team wants to correlate application logs with platform metrics to identify whether the bottleneck is CPU, memory, or a downstream service. Which approach is most appropriate?

A company must ensure that application data stored in object storage is protected even if storage media is compromised. Which control best addresses this requirement?

A team is implementing a new microservices workload. They want automated rollouts, self-healing, and the ability to scale services independently. Which IBM Cloud compute approach best fits these needs?

An application must remain available if a single zone becomes unavailable. The design must also minimize changes to the application code. Which architecture best meets this requirement on IBM Cloud?

A security team requires that workloads running in Kubernetes only pull container images that are scanned and approved. Which is the best practice to enforce this control?

After migrating to IBM Cloud, an operations team notices frequent short-lived CPU spikes causing autoscaling to oscillate (rapid scale-out then scale-in), impacting performance and cost. What is the most appropriate tuning action?

A regulated workload must demonstrate separation of duties: developers can deploy applications, but only a security team can manage encryption keys and key policies. Which design best supports this requirement?

A team is new to IBM Cloud and wants to understand how resources such as Kubernetes clusters, databases, and access policies are logically grouped for billing and access control. Which IBM Cloud concept best fits this need?

A developer must provide an application with an API key that can be rotated without changing the developer's personal credentials. What is the recommended approach on IBM Cloud?

An application experiences short bursts of traffic and the team wants to avoid managing servers while scaling automatically. Which IBM Cloud compute option best matches this requirement?

A support engineer needs to quickly verify whether a problem is localized to a single availability zone or affects an entire region. Which design choice most directly helps make this determination?

A company must ensure that only traffic from their corporate IP ranges can access a web application hosted on IBM Cloud. Which control is the most appropriate first line of defense?

A microservices team wants to separate duties so that developers can deploy workloads but cannot modify IAM policies or billing settings. What is the best approach?

An application running in IBM Cloud must consume credentials (database password, API token) without hardcoding them in the source code or container image. Which approach is best practice?

A team is diagnosing intermittent latency in an IBM Cloud-hosted API. They need to correlate request traces with container logs and platform metrics to find the bottleneck. What is the most effective monitoring approach?

A regulated workload requires encryption keys that are controlled by the customer, with strict separation so that cloud operators cannot directly access the keys. Which capability best meets this requirement?

A production application must remain available if an entire availability zone becomes unavailable. The application is currently deployed to a single zone and uses a single database instance. Which architecture change best addresses this requirement with the least single points of failure?

A team is new to IBM Cloud and wants a simple way to organize resources by environment (dev/test/prod) and control who can deploy to each environment. Which IBM Cloud capability best supports this?

An application running on IBM Cloud needs to call a third-party REST API. The security team requires that the API key is never stored in source code and is rotated periodically. What is the recommended approach?

A developer reports their IBM Cloud CLI commands are failing with authorization errors when trying to manage resources in an account. They can log in successfully, but cannot create or update resources. What is the most likely cause?

A microservices application experiences intermittent latency spikes. The team wants to correlate application request traces with infrastructure metrics and logs to find the root cause. Which approach best supports this on IBM Cloud?

A company must ensure that only private network paths are used between workloads and IBM Cloud services, avoiding exposure to the public internet. Which IBM Cloud networking feature best addresses this requirement?

A security auditor asks for proof that administrative actions on IBM Cloud resources are tracked and reviewable. Which capability should the team use to meet this audit requirement?

A team wants consistent, repeatable deployments of IBM Cloud infrastructure across multiple environments using a declarative approach. Which solution is most appropriate?

A containerized application in a private subnet needs to download updates from an external repository, but inbound access from the internet must remain blocked. Which design best meets this requirement?

A regulated workload requires encryption of data at rest using customer-managed keys and the ability to revoke access to data by disabling the key. Which solution best fulfills this requirement on IBM Cloud?

An SRE team needs an alert that triggers only when a service is unhealthy from the end-user perspective, not just when CPU is high. The service is behind a load balancer and uses multiple instances. Which monitoring strategy is most appropriate?