Cloud Engineer
Interview Questions.

What the interviewer is looking for: A strong answer will compare compute, networking, storage, and management aspects. Red flags include only listing features without comparison or showing a lack of familiarity with one of the platforms.

What the interviewer is looking for: The candidate should define AZs as isolated locations within a region and explain how distributing resources across them prevents single points of failure. A red flag would be confusing AZs with regions or not understanding their isolation.

What the interviewer is looking for: A good answer will cover CIDR blocks, subnets, route tables, internet gateways, and NAT gateways, explaining how they work together. A red flag is missing key components or not understanding how traffic flows.

What the interviewer is looking for: The candidate should discuss different types of load balancers (ALB, NLB), health checks, target groups, and auto-scaling integration. A red flag is not differentiating between load balancer types or not mentioning health checks.

What the interviewer is looking for: A strong answer defines IaC and highlights Terraform's benefits like multi-cloud support, declarative syntax, state management, and provider ecosystem. A red flag is not understanding the core concept of IaC or only listing features without context.

What the interviewer is looking for: The candidate should describe how state files track deployed infrastructure and discuss best practices like remote state, locking, and sensitive data handling. A red flag is not knowing what a state file is or suggesting storing it locally.

What the interviewer is looking for: A good answer will differentiate between roles for EC2 instances, users, cross-account access, and services, explaining the principle of least privilege. A red flag is confusing roles with users or not understanding trust policies.

What the interviewer is looking for: The candidate should explain NSGs for subnet/NIC-level traffic filtering and Azure Firewall for centralized, network-level protection with advanced features. A red flag is not understanding the scope or capabilities of each.

What the interviewer is looking for: A strong answer will include components like VPC, subnets across AZs, EC2 instances, ALB, Auto Scaling, and a managed database (e.g., RDS Multi-AZ). A red flag is missing key HA/FT components or not considering scalability.

What the interviewer is looking for: The candidate should clearly define what the cloud provider is responsible for (security OF the cloud) and what the customer is responsible for (security IN the cloud). A red flag is not understanding the distinction.

What the interviewer is looking for: The candidate should mention commands like top, htop, ps, and sar, and discuss steps like identifying processes, checking logs, and analyzing resource usage. A red flag is only suggesting a reboot or not having a structured approach.

What the interviewer is looking for: A good answer defines an image as a read-only template and a container as a runnable instance of an image, highlighting the immutability of images. A red flag is confusing the two or not understanding their relationship.

What the interviewer is looking for: The candidate should explain Pods as the smallest deployable unit, Deployments for managing Pod lifecycle, and Services for network access to Pods. A red flag is not understanding the hierarchical structure or purpose of each.

What the interviewer is looking for: A strong answer will outline stages like source control, build, test, and deploy, mentioning tools like Jenkins, GitLab CI, or AWS CodePipeline/CodeDeploy. A red flag is only listing tools without explaining the process.

What the interviewer is looking for: The candidate should describe a structured approach to problem-solving, including gathering information, isolating variables, testing hypotheses, and documenting findings. A red flag is not having a clear process or blaming external factors.

What the interviewer is looking for: A strong answer will explain Security Groups as stateful, instance-level firewalls and Network ACLs as stateless, subnet-level firewalls. A red flag is confusing their scope, statefulness, or rule processing.

What the interviewer is looking for: The candidate should discuss CloudWatch Metrics, Logs, Alarms, and Dashboards, explaining how they provide visibility and enable proactive responses. A red flag is only mentioning basic metrics without understanding alarms or logs.

What the interviewer is looking for: A strong answer will mention using IAM roles (for EC2 instances), temporary credentials, or environment variables, emphasizing avoiding hardcoded credentials. A red flag is suggesting storing AWS keys directly in the script.

What the interviewer is looking for: The candidate should use commands like 'find' with '-size' and '-exec' or 'xargs'. A red flag is an incorrect syntax, inefficient approach, or not understanding basic shell scripting concepts.

What the interviewer is looking for: A good answer will cover rightsizing, reserved instances/savings plans, spot instances, auto-scaling, shutting down idle resources, and leveraging managed services. A red flag is only mentioning one or two strategies.

What the interviewer is looking for: A strong answer will highlight benefits like automation, repeatability, version control, dependency management, and drift detection. A red flag is only mentioning automation without further detail.

What the interviewer is looking for: The candidate should define a subnet as a range of IP addresses within a VPC and explain its importance for organization, security (via NSGs/Security Groups), and availability (across AZs). A red flag is not understanding IP addressing basics or the purpose of segmentation.

What the interviewer is looking for: The candidate should describe a structured learning process, such as reading documentation, hands-on labs, online courses, and building small projects. A red flag is a lack of curiosity or a passive learning approach.

What the interviewer is looking for: A strong answer demonstrates self-awareness, an ability to accept feedback gracefully, and a willingness to learn and improve. A red flag is defensiveness, blaming others, or an inability to recall a specific instance.