Tech Docs
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Candidates say take-home projects are stretching from short work samples into 10-, 20-, even 50-hour assignments. Here is where a useful skills test ends and unpaid interview work begins.
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Linux Command #47 explains newgrp: switching the current group in a shell, newgrp -, verifying with id, file group ownership, membership rules, and safe troubleshooting.
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Lockout/tagout explained in plain language: hazardous energy, locks vs. tags, stored energy, verification, tryout, and how LOTO applies in data centers, Bitcoin mining sites, fabs, and industrial maintenance.
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OSNTC.019 explains Spanning Tree Protocol: Layer 2 loops, broadcast storms, root bridge election, BPDUs, path cost, port roles, RSTP, and basic switch verification.
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U.S. software stocks have reached fresh 2026 highs as investors rethink fears that AI would rapidly destroy traditional software companies.
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Elementary Overview and Review Direct Memory Access (DMA) is a hardware engine that moves data between memory and peripherals without making the CPU copy every byte itself. In OSFEC.002, we used tasks, priorities, interrupts, and timing to keep firmware responsive; in OSFEC.005, we built a safer firmware update path. DMA adds another production tool: let…
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Learn a focused I²C troubleshooting workflow: verify SDA/SCL, pull-ups, addresses, ACK/NACK, logic-analyzer captures, and common firmware-to-peripheral faults.
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Learn hardware/firmware compatibility for firmware technicians: board revisions, MCU device IDs, bootloader requirements, image verification, board-specific settings, and field validation.
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Learn optical amplification engineering with EDFA, Raman gain, ASE noise, noise figure, OSNR, gain flatness, and DWDM span planning.
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Learn how production embedded bootloaders safely update firmware using image headers, integrity checks, signed images, A/B slots, rollback, version control, recovery paths, and release verification.
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Learn fiber fusion splicing step by step: strip, clean, cleave, align, fuse, protect, route, test, troubleshoot, and verify splice quality.
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What is a vCPU? Learn how virtual CPUs relate to physical CPU sockets, cores, threads, Hyper-Threading, hypervisors, cloud VMs, oversubscription, and CPU scheduling.
