CWISA-102 Sample Questions & Answers

A solutions architect is designing an IoT system for a fleet of delivery vehicles. The system needs to report the vehicle's location, speed, and cargo temperature to a central server in real-time. Which TWO of the following wireless technologies are most appropriate for this application? (Select TWO)

True or False: In radio communications, Chirp Spread Spectrum (CSS) modulation achieves processing gain and robustness against interference by rapidly changing the carrier frequency of a signal across a wide band of frequencies in a pseudorandom sequence.

Company Background:
SmartBuild Inc. is developing a comprehensive smart building solution for a new 50-story corporate headquarters. Their goal is to integrate lighting, HVAC, occupancy sensing, and access control into a single, cohesive system. The building features a steel frame and concrete floors, which are known to cause significant RF attenuation.

Current Situation:
The project team has selected a variety of best-in-class IoT devices from different manufacturers. The lighting system uses Zigbee, the occupancy sensors are Bluetooth Mesh, and the HVAC controllers use a proprietary 802.15.4 protocol. The access control system is wired but needs to receive occupancy data to unlock doors during emergencies.

Requirements and Constraints:
The primary requirement is to create a unified management and automation platform that can control all systems seamlessly. The solution must be resilient to RF interference from the building's dense Wi-Fi deployment and the physical structure. A key use case is to automatically dim lights and reduce HVAC in unoccupied areas, based on data from the Bluetooth sensors. All communication must be secured with modern encryption standards.

Question:
Given the heterogeneous device environment and challenging RF conditions, which implementation strategy should SmartBuild Inc. prioritize to ensure a successful deployment?

A developer is writing a script to pull configuration data from a network of IoT gateways. The data must be returned in a format that is both human-readable and easily parsed by machines, with a strong emphasis on hierarchical structure and the use of data models. Which data structure format would be the most appropriate choice?

When planning an RTLS deployment in a warehouse, the project manager must choose a location determination method. The requirement is to pinpoint the location of an asset within a 2D space using its distance from three known reference points (anchors). What is this specific location method called?

An administrator is setting up a secure data transfer mechanism for IoT devices. The chosen messaging protocol is MQTT. To ensure that messages are delivered at least once, but may be delivered more than once in certain failure scenarios, which Quality of Service (QoS) level must be configured?

A key difference between Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Access (OFDMA) is that OFDMA allows for the subdivision of a channel to serve multiple users simultaneously. How does OFDMA achieve this?

You are tasked with documenting a newly implemented smart factory solution. The documentation must include a diagram that clearly shows the physical location of all gateways, sensors, and servers, as well as the wired and wireless connections between them. Which part of the solution documentation would contain this information?

A project requires an IoT communication protocol that operates over UDP, is extremely lightweight for constrained devices (CoAP), and follows a client/server model similar to HTTP, including methods like GET, POST, PUT, and DELETE. Which protocol fits this description?

A city is planning a smart parking solution. They need to identify which parking spaces are occupied. The system must have low infrastructure costs and the sensors must be battery-powered for several years. The city has decided against using a licensed cellular technology. Which TWO of the following technologies would be strong candidates for this use case? (Select TWO)