ISACA IoT Fundamentals Certification Sample Questions

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ISACA IoT Fundamentals Sample Questions:

01. In a road tunnel, smoke detectors and ventilation fans from several vendors report to one platform. After an incident, operators cannot tell whether a fan started before or after the nearest detector alarmed, because each device stamps its messages from its own unsynchronized clock.

Which requirement would allow the events to be correlated?

a) Every device sending its messages at a fixed interval

b) Every device keeping its clock aligned to a shared time reference

c) Every device reporting through the same gateway, protocol and platform message broker

d) Every device using the same message format

02. A greenhouse heater is controlled by a rule that turns it on when the temperature reading falls below the setpoint and off as soon as the reading rises above it. The technician notices the heater relay clicking on and off many times a minute whenever the greenhouse is near the setpoint.

Which change would BEST stop the rapid switching?

a) Switch on below one level and off above a slightly higher level

b) Sample the temperature more often so the rule responds sooner

c) Fit a more precise sensor and shorten its wiring

d) Move the setpoint a few degrees higher than before

03. Why do IoT deployments choose a connectivity technology by matching it to the deployment's profile rather than adopting one technology for everything?

a) Radios of one technology interfere with each other

b) Each technology is approved for one application domain, such as agriculture

c) A single technology would let any device join any network unchecked

d) Range, power use and data rate trade against each other

04. A district-heating operator gives tenants a portal showing hourly heat consumption for every apartment in a block, labeled only by apartment number, so that neighbors can compare their usage. A tenant notices that the figures show clearly which apartments are unoccupied on which evenings and for how long. No names, addresses or account details appear anywhere on the portal.

Which concept explains how figures that looked harmless became personal information?

a) Aggregation of the readings across every apartment in the block

b) Inference drawn from patterns and gaps in the readings

c) Linkage of the readings to a separate customer account database

d) Interception of the readings while they crossed the operator's network

05. Six humidity sensors in a single cold room all sit within direct radio reach of one mains-powered hub, and the operator wants the simplest design with the least delay. Which network arrangement is MOST appropriate?

a) A pair of hubs with the sensors split between them

b) A chain in which each sensor forwards to the next

c) A star in which every sensor sends directly to the one hub

d) A mesh in which each sensor relays for its neighbors

06. A ski lift operator changes its motor current sensors from sending every raw sample to sending one average value per minute, to reduce traffic to the platform. A week later, a maintenance engineer asks why a brief overload that tripped the lift does not appear in the platform's history.

Which effect of the change explains the missing event?

a) Short spikes inside each interval are smoothed away by the average

b) Averaging introduces a delay of a full interval before any value is visible

c) The platform cannot store averaged values alongside raw samples

d) The averaged values are rounded and lose precision

07. Two fish farms use connected sensors to run their aeration pumps. At the first farm, a site node reads the oxygen sensors and switches the pumps. At the second, every reading goes to a cloud service that sends back each pump command. One morning both farms lose their internet connection for several hours.

Which outcome is MOST likely?

a) Both farms stop, since the sensors at each farm cannot report without an internet link

b) Only the second farm keeps running, since the cloud holds its data

c) Both farms keep running, since the sensors themselves continue to sample the water as before

d) Only the first farm keeps running, since its decisions are made on site

08. A smart lock on a dental clinic's storeroom opens when it receives an encrypted unlock command from the receptionist's badge reader. An attacker who cannot read the encrypted traffic records one unlock command as it passes and re-sends the same bytes that night, and the lock opens.

Which change to the command design stops the recorded copy from working?

a) Signing each command with the badge reader's private key before it is sent

b) Including a one-time value in each command so a copy is rejected

c) Sending each unlock command twice so the lock can compare the two copies

d) Encrypting each command with a longer key so recordings take years to break

09. An IoT platform keeps a record for each sensor in a road tunnel. After a power cut, several sensors restart and are given different network addresses. Sensors that were moved to a new tunnel section also change address. Which value should the platform use to link each sensor to its record so that the records survive these changes?

a) The network address assigned to the sensor, recorded at first registration

b) The physical position in the tunnel recorded at installation time

c) The device's unique identity, such as its issued certificate

d) The gateway that currently forwards the sensor's traffic

10. A car park has long used a wired link so that a vehicle counter at the entrance updates a sign at the exit, with no person involved. The operator upgrades so that counts from all of its car parks reach a hosted service that analyzes occupancy across the city.

What does the upgraded arrangement add beyond the original machine-to-machine link?

a) Scale, since one platform now analyzes many sites

b) Automation, since the exit sign now updates with no person involved

c) A closed control loop, since the count now changes the sign

d) Sensing, since the entrance counter now measures vehicles automatically

Answers:

Question: 01 Answer: b	Question: 02 Answer: a	Question: 03 Answer: d	Question: 04 Answer: b	Question: 05 Answer: c
Question: 06 Answer: a	Question: 07 Answer: d	Question: 08 Answer: b	Question: 09 Answer: c	Question: 10 Answer: a

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