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DCI practice questions - frequently asked questions

Plain answers about how DCI Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real DCI exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The DCI exam spans 22 domains: SAFETY; BASIC ELECTRICITY; DATA CABLING INTRODUCTION; DATA COMMUNICATIONS BASICS; CABLING SPECIFICATIONS AND STANDARDS; BASIC NETWORK DESIGN: ARCHITECTURE AND IMPLEMENTATION; CABLE CONSTRUCTION; CABLE PERFORMANCE CHARACTERISTICS; NATIONAL ELECTRICAL CODE® and UNDERWRITERS LABORATORIES® REQUIREMENTS; TELECOMMUNICATIONS CABLING SYSTEM STRUCTURE; DATA CABLING INSTALLER TOOLS; TRANSMISSION MEDIA FOR NETWORKING AND TELECOMMUNICATIONS; WORK AREA TELECOMMUNICATIONS OUTLET AND CONNECTORS; LOCAL AREA NETWORK INTERCONNECTION AND INTERNETWORKING; WIRELESS HETEROGENEOUS CABLING NETWORKS; CABLING SYSTEM COMPONENTS; CABLING SYSTEM DESIGN; CABLING INSTALLATION; CONNECTOR INSTALLATION; CABLING TESTING AND CERTIFICATION; CABLING TROUBLESHOOTING; DOCUMENTATION. Every practice question on this site is tagged to one of these domains.

The DCI exam has 75 questions and is completed in 2 hours. Our timed practice mirrors that length and pacing, so exam day feels familiar.

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