Red Hat DevSecOps & Supply Chain Security interview questions

Three terms that get used interchangeably and answer three different questions. The one that makes them operational is the admission rule at the end: no provenance, no deploy.

Most clusters fail an RBAC review on the same handful of patterns. Naming them concretely, plus the namespace-first design that prevents them, is what separates operators from tutorial readers.

Naming the replacement is the floor of this question. What scores is the audit-then-warn-then-enforce sequence and an honest answer about the vendor chart you cannot fix.

Signing proves what shipped, not what runs. The strong answer covers syscall-level detection, the signals that matter, tuning against alert fatigue, and the response path once a sensor fires.

Break-glass exists to restore login when the identity provider is the thing that died. Few accounts, sealed hardware factors, an alert on every authentication, a printed runbook and a quarterly drill.

Escapes ride kernel bugs, privileged configuration and host mounts, not namespace magic. Cut the syscall and capability surface first, sandbox only what the trust boundary demands, and build nodes expecting compromise.

An agent is a workload that acts on behalf of a person, holds credentials for several systems, and decides what to call based on text it read. Every one of those properties breaks an assumption in your existing access model.

Experienced answers are ordered and verifiable: minimal base, benchmark applied as code, identity and exposure next, then continuous proof it stayed that way. Checklists recited out of order are the tell.

Easy to define and easy to fail. The scoring half is where each gate sits, what it does to build time, and the honest admission of what the whole set misses.

Everyone endorses least privilege; few can describe how they would measure over-permission across a fleet. The scoring answer names the evidence source, the tiered remediation, and the break-glass hatch that makes it survivable.

Reciting injection classes you cannot fix is the trap. The scored move maps each risk category to a lever an ops or platform engineer owns, from response headers to metadata endpoints.

Miners prove unauthorized workload execution, not a particular intrusion sequence. Parallel identity and network containment, backup control-plane protection, rebuild-don't-clean, and restore points older than patient zero.

Push approval is a weak factor and fatigue is its predictable failure mode. Stop the campaign with number matching and rate limits; end the attack class with passkeys, device gating and a hardened helpdesk.

Volumetric floods die at the anycast edge; everything else reaches your origin anyway. The origin leak, expensive endpoints and unproxied surfaces decide whether a CDN is armour or decoration.

Four scanners, four different things they see, and one rule that decides whether any of them help: a finding that arrives at the release gate is an argument, and the same finding on a pull request is a ten-minute fix.

Encryption is the part people focus on and the least interesting part. What you are buying is short-lived credentials, a revocation path and an audit trail, none of which an environment variable can give you.

Measuring the whole codebase gives a team an unpayable debt and a gate they turn off. Measuring only the lines changed in this pull request gives them a gate they can pass today.

Workload authentication, traffic encryption and authorization need separate verification. Admission and RBAC constrain who can deploy a workload that bypasses those controls.

The single highest-value security change available to most pipelines, and the reason it works is worth understanding rather than configuring. It removes the secret rather than protecting it.

Tool selection is the shallow half of secrets questions. Senior answers live in the mechanics: dual-validity windows, consumer caching, and revocation you have actually tested rather than assumed.

The reframe that scores: many controls contain machine-checkable assertions; others require human evidence. Guardrails prevent, gates stop pipelines, drift detection watches live state, and evidence falls out as a byproduct.

VPN grants a network, ZTNA brokers an application. The strong answer covers the engineer-specific protocols nobody mentions, device posture for contractors, and the break-glass path when the IdP is down.