CWNP CWISA-102 CWISA Exam Practice Test Instant Access

Question 1

In the simplified three-layer model for wireless IoT, what is the universal primary function of the Perception layer?

AGathering and transmitting data to be used for actions, analysis or reporting

BAnalyzing data for actions and reporting using AI and ML

CDecrypting local data to send across the unencrypted IoT network

DProviding the network across which data can be transmitted to the cloud

Answer : A

Perception Layer:The foundation of an IoT system, it consists of sensors and actuators that:

Sense:Collect data about the environment or object being monitored.

Actuate:Potentially make changes based on commands (e.g., a smart valve opening/closing).

Transmit:Send gathered data to upper layers for processing.

Question 2

What function does the IEEE perform in relation to wireless technologies?

APromotes technology and standards development

BDesigns wireless chipsets

CCertified equipment to be compatible

DBrings wireless products to market

Answer : A

IEEE's Role:The Institute of Electrical and Electronics Engineers (IEEE) is a global organization critical in developing and promoting technical standards across various fields, including wireless technologies.

Standards Work:IEEE creates wireless technology standards like:

IEEE 802.11:Wi-Fi standards

IEEE 802.15.4:Basis for ZigBee, Thread, and other low-power networks

References

IEEE:https://www.ieee.org/

Question 3

How does OFDMA differ from OFDM?

ASubcarriers of OFDMA can contain data destined for a different receiver

BOFDMA offers greater range by using multiple channels at once

COFDMA allows multiple devices to transmit simultaneously on the same frequency

DOFDMA uses multiple radios to achieve higher throughput

Answer : C

OFDM vs. OFDMA:

OFDM (Orthogonal Frequency-Division Multiplexing):Divides a channel into multiple subcarriers for data transmission.

OFDMA (Orthogonal Frequency-Division Multiple Access):Extends OFDM by allowing multiple users to share subcarriers simultaneously, improving efficiency and spectral utilization.

References

OFDM:https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

OFDMA:https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiple_access

Question 4

What software is typically stored in ROM and is used to initialize a device?

AFirmware

BApplication

CContainer

DService

Answer : A

Firmware Definition:Firmware is a type of software embedded in hardware devices. It provides low-level instructions that control the basic operations and initialization of the device.

ROM Storage:Firmware is typically stored in Read-Only Memory (ROM) or other forms of non-volatile memory, meaning it persists even when the device is powered off.

Functions:

Booting:Initiates the hardware and loads the operating system.

Hardware Control:Provides an interface between the hardware and the operating system.

BIOS:The firmware on PCs is often referred to as BIOS (Basic Input/Output System).

References

Firmware Reference:https://en.wikipedia.org/wiki/Firmware

ROM:https://en.wikipedia.org/wiki/Read-only_memory

Question 5

Which one of the following location tracking technologies is most energy efficient in typical implementations?

ABLE Beacons

BCellular

CGPS

DWi-Fi

Answer : A

BLE Beacon Power Efficiency:Bluetooth Low Energy (BLE) beacons are designed for low power consumption.Their primary function is to periodically broadcast short data packets (advertising their presence).

Other Technologies:

Cellular:More power-hungry due to long-range communication and complex protocols.

GPS:Power intensive,especially when actively tracking location.

Wi-Fi:

Question 6

What is the most common difference between a single board computer (SBC) and a controller board?

ASBCs typically have connectors for display and input devices while controller boards do not

BController boards have I/O headers and SBCs do not

CSBCs always have connectors for M2 devices and controller boards do not

DController boards have more powerful processors than most SBCs

Answer : A

SBCs (Single Board Computers):Designed as standalone, small-form-factor computers. They often include:

Display Interfaces:HDMI, DisplayPort, etc.

Input Connections:USB for keyboards, mice, etc.

General Purpose Functionality:Can run a full operating system for wider applications.

Controller Boards:Focus on controlling specific hardware or systems.

Limited direct I/O:Limited connectors for displays/input devices.

Specialized tasks:Designed for embedded applications within larger systems.

References

SBC Examples:https://www.raspberrypi.org/,https://www.beagleboard.org/

Controller Board Examples:https://www.arduino.cc/

Question 7

What is the most important consideration when deciding whether to implement a wired or wireless solution?

AThe distance between nodes

BThe availability of PoE

CThe applications being used

DBusiness and system requirements

Answer : D

Requirements Drive Decisions:The decision between wired or wireless must align with the solution's overall purpose, performance targets, and operational constraints.

Key Considerations:

Reliability:Does the application require guaranteed connectivity? (Wired may be favored).

Installation Cost:Can extensive cabling be done, or is it prohibitively expensive? (Wireless may be favored).

Flexibility and Scalability:Is node placement likely to change in the future? (Wireless may be favored).

Other Factors are Important, But Secondary:Distance, PoE availability, specific applications all matter, but they are assessedwithin the contextof the overarching business needs.

References:

Wireless vs. Wired Network Design:Comparisons of pros and cons, highlighting how use cases guide the choice.

IoT Solution Planning:Materials on defining requirementsbeforeselecting technology.

CWNP CWISA-102 Certified Wireless IoT Solutions Administrator Exam CWISA Exam Practice Test