Comm-Dev-101 Exam Questions Tutorials

The cartridge ' s root-levelpackage.jsonuses the " hooks " property to point to the hook registration file. In the standard SFRA cartridge structure, the hook-registration file resides under:

cartridge/scripts/hooks.json

Therefore, the correct relative path is:

{ " hooks " : " ./cartridge/scripts/hooks.json " }

Salesforce ' s SFRA hook documentation confirms thatpackage.jsonuses thehookskeyword to identify the hook file and that the referenced hook file then maps extension-point names to script implementations.

Option B omits thecartridgeportion of the normal directory structure, so it points to the wrong location. Option C uses JavaScript-object syntax rather than valid JSON because thehooksproperty name is unquoted. Apackage.jsonfile must contain valid JSON.

Thehooks.jsonfile contains entries with the extension-pointnameand correspondingscriptmodule. Once the cartridge is deployed and active on the appropriate cartridge path, registered hooks can participate in storefront or platform extension points.

Study Guide reference:Application Development — hook registration,package.json,hooks.json, cartridge structure, CommonJS hook modules, and extension points.

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B2C Commerce allowsmultiple modules to be registered for the same extension point, including multiple registrations in a singlehooks.jsonfile. Salesforce explicitly documents this behavior. When the extension point is invoked, all registered modules are executed rather than stopping after the first implementation.

Option B is incorrect as stated for modules registered together in one hook configuration: Salesforce states that the developer cannot explicitly control their execution order through the registration itself. Across cartridges, however, hook execution follows cartridge-path order, so cartridge precedence can affect the sequence in which implementations from different cartridges execute. Option C is also incorrect because Salesforce specifies that when multiple hook modules are called,the last hook ' s return valueis the return value that is ultimately used—not the first hook ' s return value. All registered implementations still execute even if earlier implementations return values.

This behavior is important when several cartridges extend the same business process. Developers must design hooks to coexist without assuming that their implementation is the only one registered.

Study Guide reference:Application Development — SFRA hooks,hooks.json, extension points, HookMgr, cartridge-path execution, and multiple hook implementations.

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TheFATALlogging level is the special severity level that thedw.system.LogAPI identifies as always enabled under normal logging operation. It represents severe conditions for which developers should always be able to emit diagnostic information.

Salesforce ' sdw.system.LogAPI documentation explicitly states thatFatal log messages are always enabledand can optionally be distributed through email notification configuration. INFO, by contrast, depends on the configured logging threshold and target settings. ERROR also participates in the configurable category hierarchy and does not carry the same API-level guarantee expressed for FATAL.

B2C Commerce custom logging uses a log4j-style hierarchy. Categories inherit logging behavior from parent categories unless a more specific rule applies. For example, an INFO threshold permits INFO, WARN, ERROR, and FATAL. A WARN threshold permits WARN, ERROR, and FATAL. Salesforce also supports configuring log targets separately from filters.

FATAL should be reserved for genuinely severe application conditions rather than routine diagnostic output, because excessive high-severity logging obscures operational incidents and reduces the diagnostic value of the logs.

Study Guide reference:Application Development —dw.system.Log, logging severity, custom log categories, FATAL logging, and production diagnostics.

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The B2C Commerce Service Framework provides arate limiterspecifically for controlling the maximum number of outbound service calls permitted during a defined time interval. This configuration belongs to theService Profileassociated with the service. The profile exposes values equivalent to the maximum permitted calls and the rate-limit interval in milliseconds.

Salesforce documents that the Service Profile controls timeout, rate-limit, and circuit-breaker behavior. The rate limiter is evaluated before every service invocation. If the configured maximum number of calls has already been reached within the interval, B2C Commerce prevents another remote request and returns service-unavailable behavior instead.

This mechanism counts service invocations irrespective of whether the previous remote calls succeeded or failed, which directly matches the requirement to restrict overall calls per second. A circuit breaker is different: it reacts specifically to accumulated failures. Option C incorrectly treats this as a general platform quota, while option A refers to configuration that is not the standard Service Framework mechanism.

Study Guide reference:Application Development — Service Framework, Service Profiles, rate limiting, circuit breakers, and external integration governance.

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