What's new on Gnoseed

New deck: Azure AI Cloud Developer (AI-200)

Sun, 08 Nov 2026 12:52:44 GMT

105 cards across 5 modules.

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New deck: PostgreSQL Internals

Wed, 04 Nov 2026 12:00:59 GMT

112 cards across 7 modules.

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Claude Certified Developer — Foundations · 2026-10-21

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking 2026-10-21.

A request to the Messages API with anthropic-version: 2026-10-21 still sends temperature: 0. What happens?

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Claude Certified Developer — Foundations · claude-sonnet-5-5

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking claude-sonnet-5-5.

A request to Claude Sonnet 5.5 sends thinking: {"type": "disabled"} and gets a 400 error. How do you turn off up-front thinking on that model?

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Git & GitHub · 2.56

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking 2.56.

Git 2.56 runs git refs update refs/heads/main <new> <old>. What does Git check before it moves main to <new>?

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HTTP & Networking · RFC 10024

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking RFC 10024.

RFC 10024 defines X25519MLKEM768 as a hybrid key agreement group for TLS 1.3. What makes it hybrid, and when does the shared secret stay secure?

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Kubernetes Basics · 1.35

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking 1.35.

Two containers must share one GPU, chosen by its attributes with a CEL expression. Why does Dynamic Resource Allocation fit where a device plugin does not?

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Kubernetes Basics · 1.37

Thu, 29 Oct 2026 21:55:09 GMT

4 cards tracking 1.37.

You rotate the encryption-at-rest key, but objects already in etcd stay encrypted under the old one. What rewrites them?
kube-proxy in Kubernetes 1.37 warns when it starts with no proxy mode set. Which mode is the Linux default today, and which is it due to become?
Kubernetes 1.37 turns SELinuxMount on by default. Which Pod field restores the old recursive relabelling for a workload the change breaks?
Kubernetes 1.37 adds an Unused condition to every PVC. Besides a Running Pod, which Pod phase referencing the claim keeps that condition at False?

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K8s Ops: Scheduling & Resources · 1.35

Thu, 29 Oct 2026 21:55:09 GMT

3 cards tracking 1.35.

A node still runs cgroup v1, and its Kubernetes 1.36 kubelet configuration does not mention failCgroupV1. What happens when the kubelet starts?
What Kubernetes feature allows container resources to change without Pod restart?
Which Pod field controls whether resizing a container's resources requires a restart?

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MITRE ATT&CK · v20

Thu, 29 Oct 2026 21:55:09 GMT

2 cards tracking v20.

ATT&CK v20 added Direct Prompt Injection (T1699) and Indirect Prompt Injection (T1698) to the Enterprise matrix. Under which tactic do they sit, and how are they related?
An account has MFA turned on, yet an adversary who steals one of its application-specific passwords (ATT&CK T1697) can sign in. Why?

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OPA / Gatekeeper — Policy as Code · 1.21

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking 1.21.

OPA 1.21 loads a GitHub Actions workflow containing on: push through --data. What does that part of data look like now?

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OpenTelemetry · v1

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking v1.

OpenTelemetry's Go compile-time instrumentation reached v1. How does a Go service get zero-code instrumentation with it?

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Prometheus & Observability · 3.15

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking 3.15.

Prometheus 3.15 has been writing chunks with storage.tsdb.chunk_encoding.floats: xor2, and you must downgrade to a release without XOR2 support. What does the downgrade require?

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Terraform Associate: Fundamentals · 1.17

Thu, 29 Oct 2026 21:55:09 GMT

2 cards tracking 1.17.

Terraform 1.17 adds terraform plan -minimal-refresh. Which resource instances does that plan refresh?
Terraform 1.17 lets a required_providers entry take its source or version from a variable. What must be true of that variable?

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Web Security · RFC 10017

Thu, 29 Oct 2026 21:55:09 GMT

1 card tracking RFC 10017.

RFC 10017 (BCP 212) describes architectures for browser-based OAuth apps. Which one does it strongly recommend for business apps and apps handling personal data?

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New deck: Amazon EKS

Wed, 23 Sep 2026 14:01:42 GMT

97 cards across 6 modules.

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New deck: AWS IAM: Policies & Access Control

Tue, 22 Sep 2026 15:33:05 GMT

102 cards across 6 modules.

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Helm · 4.0

Mon, 14 Sep 2026 11:50:40 GMT

3 cards tracking 4.0.

Which helm upgrade flag rolls the release back to its previous revision when the upgrade fails?
What status does a release show after a helm upgrade fails and --rollback-on-failure was not set?
A release installed by Helm 3 is upgraded with Helm 4 and no extra flags. Does that upgrade use server-side apply?

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K8s Ops: Reliability & Security · 1.37

Mon, 14 Sep 2026 11:50:40 GMT

2 cards tracking 1.37.

A Pod mounts a podCertificate projected volume naming a signer. Who generates the private key and creates the PodCertificateRequest?
Which RBAC verb must a controller hold on a signer to create a ClusterTrustBundle linked to that signer?

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