Careers in cloud computing

Centralize identity with SSO and MFA, use role-based access with least privilege and just-in-time elevation for admins, separate environments into accounts or subscriptions, enforce guardrail policies, log all administrative actions centrally and review access regularly. Interviewers want layered, identity-first design.

Zero trust means no implicit trust based on network location; every request is authenticated, authorized and evaluated using identity, device health and context. In practice it means strong identity, conditional access, segmentation, encryption and continuous monitoring. Avoid treating it as a single product.

It is a structured way to identify what can go wrong with a system and how to mitigate it, for example using STRIDE on a data flow diagram. Do it during design and when significant changes happen, with developers and owners involved. Mention that outputs should become tracked requirements.

Use TLS for data in transit, encryption at rest with managed keys, strict key access controls and rotation, and classification to decide where stronger controls apply. Mention that encryption does not replace access control and that key management is where designs often fail.

Understand their deadline, offer a lightweight review focused on the highest risks, provide pre-approved patterns they can adopt, and agree follow-up actions for later. This shows you enable the business rather than blocking it.

Group systems by function and sensitivity, place controls between segments with default deny, restrict administrative access through jump hosts or privileged access workstations, and use micro-segmentation where supported. Monitor traffic between segments. Interviewers look for defense in depth.

Describe the options, the criteria such as risk, cost, performance and complexity, what you chose and why, and how it worked out. Interviewers want structured reasoning and honesty about downsides.

Publish clear reference designs, automate checks with policy as code and posture management, include security in design reviews and pipelines, and track exceptions with owners and expiry dates. Enforcement through automation is more reliable than documents alone.

Check CPU, memory, disk I/O and network utilization with tools such as top, vmstat, iostat or Performance Monitor, identify the process responsible, review logs and recent changes, and compare with baseline. Explain how you would fix or escalate. Interviewers want a structured approach using evidence.

Test patches in a non-production environment first, schedule a maintenance window, take backups or snapshots, patch in stages, verify services afterward and have a rollback plan. Track compliance and handle emergency patches for actively exploited issues. This shows balance between security and uptime.

Describe the 3-2-1 approach of three copies, two media types and one offsite or immutable copy, with retention set by business needs. Stress that you test restores regularly, because an untested backup is not a backup. Mention recovery time and recovery point objectives.

Permissions are read, write and execute for owner, group and others. You would set the group owner with chgrp, grant group write with chmod g+w, and consider setgid on the directory so new files inherit the group. Mention ACLs for more complex needs and least privilege.

Group Policy centrally manages settings for users and computers in Active Directory, applied through objects linked to sites, domains and organizational units. Give an example such as enforcing password policy, mapping drives or deploying security baselines, and mention testing and gpresult for troubleshooting.

Check its status and logs with systemctl status and journalctl or the Windows event log, look for dependency, permission, configuration or port conflicts, check recent changes, fix and verify, then make sure it is enabled to start on boot. Document the cause.

Describe the manual process, why it was worth automating, the script or tool you wrote, how you tested it and the time or errors saved. Interviewers want to see initiative and safe automation practices.

Understand what they need to do, find a way to meet it with least privilege, such as installing the software for them or granting a specific permission, and follow the approval process. Explain the risk politely. This shows service mindset combined with security.

Keep runbooks, configuration records, network and server diagrams, and clear ticket notes that another admin could follow. Update documentation as part of each change. Interviewers value this because it shows you think about the team, not just yourself.

Start with default deny, allow only required traffic such as HTTPS from the internet to a load balancer or web tier, restrict the web tier to the application tier on specific ports, and the database only from the application tier. Log denies, document each rule's purpose and owner, and review regularly. Interviewers want least privilege and documentation.

An IDS monitors and alerts on suspicious traffic; an IPS sits inline and can block it. IPS reduces response time but can break legitimate traffic if tuned poorly, so rollouts often start in detection mode. Showing awareness of that trade-off is the key.

Check that the source is generating logs, the forwarder or agent is running, network paths and firewall ports are open, the collector is receiving, parsing is correct, and time stamps are right. Work step by step along the pipeline. Interviewers listen for structured troubleshooting.

Use a change request with justification, peer review, a test plan, a maintenance window, configuration backups before and after, and a rollback plan. Verify the change worked and update documentation. This shows you protect availability as well as security.

Phase 1 (IKE) authenticates the peers and builds a secure channel using agreed encryption, hashing, Diffie-Hellman group and pre-shared key or certificates. Phase 2 negotiates the IPsec security associations that protect the actual traffic, defined by the interesting traffic selectors. Mention that mismatched parameters or selectors are the most common failure.

Use hit counters and logs over a meaningful period to find unused rules, look for overly broad rules such as any-any, confirm with rule owners, disable before deleting, and document the change. Doing this regularly as a scheduled review is what interviewers want to hear.

Be honest: describe the change, the impact, how you detected and rolled back, how you communicated, and what process you improved afterward. Interviewers value ownership and learning over a perfect record.

Certificates bind identities to public keys, enabling TLS encryption, device and user authentication, VPNs and code signing. PKI manages issuing, renewal and revocation. Mention that expired certificates cause outages, so inventory and automated renewal are important.

Start from a recognized baseline such as CIS benchmarks, remove unused services and software, apply patches, enforce strong authentication and least privilege, configure host firewall and logging, and verify with a compliance scan. Document deviations. Interviewers want a baseline-driven, verifiable approach.

Authentication events, privilege use, process creation, service and configuration changes, security tool events and application logs, with accurate time sync and central forwarding. These support detection, investigation and compliance. Mention protecting logs from tampering.

Drift is when systems gradually move away from their approved configuration through manual changes. Detect it with regular compliance scans, configuration management tools and file integrity monitoring, and fix it by reapplying the baseline. Explain why automation reduces drift.

Give each account only the access needed to do its job. For service accounts, use dedicated accounts per service, deny interactive logon, use managed service accounts or vaulted credentials with rotation, and review permissions regularly. Show practical controls, not just the definition.

Confirm the scope, identify why such as legacy systems or exemptions, prioritize enforcing MFA for privileged access, apply compensating controls where it is not yet possible, and track remediation with a deadline. Report progress to management. This shows risk ownership.

Understand how people work, test settings with a pilot group, communicate changes in advance, provide alternatives where friction is high and measure the impact. Good answers show that unusable security leads to workarounds.

Describe how you verified it, reported it to the owner with evidence and a suggested fix, followed up and how it was resolved. Interviewers look for tact and responsible escalation.

Monitor critical system files, configurations and binaries for unexpected changes, alert on changes outside approved change windows, and tune it to avoid noise from normal updates. Tie alerts to change records so real anomalies stand out.

Start from business goals and capabilities, assess the current state, define a target architecture and a roadmap of steps, and evaluate options against cost, risk and value. Involve stakeholders and review regularly. Interviewers want to see business thinking, not just technology preferences.

Consider whether it differentiates the business, total cost including maintenance, time to value, skills available, integration, security and vendor lock-in. Build only what gives competitive advantage. Structured criteria are what interviewers want.

Consistent naming and versioning, clear contracts and documentation, strong authentication and authorization, pagination and error standards, backward compatibility and monitoring. Explain how standards help many teams integrate safely.

Make it visible in a register with impact, prioritize debt that blocks goals or creates risk, fund it as part of the roadmap and prevent new debt through standards and reviews. Show you treat it as a business decision.

Understand the problem it solves, evaluate it against criteria such as security, supportability and cost, consider a time-boxed pilot, and either update the standards or recommend an alternative with reasons. This shows openness with governance.

Identify critical services and their availability needs, remove single points of failure, use redundancy across zones, design for graceful degradation, test failover and backups, and monitor. Link design choices to recovery objectives.

Describe the stakeholders, how you built your case with evidence, addressed concerns and reached agreement, and the result. Influence is central to architecture roles, so interviewers listen closely.

Use diagrams at multiple levels of detail, record key decisions with context and alternatives, keep it versioned and close to the work, and update it when things change. Useful documentation is short and current.