Free Salesforce B2C-Commerce-Developer Practice Exam with Questions & Answers | Set: 3

For improving client-side performance, several techniques are considered best practices:

Place CSS outside of templates (B): External CSS files can be cached by the browser, reducing the need to download them for every page load. This also separates content from style,

which aids in maintaining cleaner HTML and potentially speeds up page rendering times.

Compress CSS (C): Compressing CSS files reduces their size, leading to faster download times. This can be achieved through minification, which removes unnecessary characters from code without changing its functionality.

Combine several images into a single image (CSS sprites) (E): Using CSS sprites combines multiple images into one larger image that is downloaded as a single file. This reduces the number of HTTP requests needed for loading multiple images, thereby decreasing load times and improving performance.

For handling locale-specific information in Salesforce B2C Commerce, it is efficient to use localizable attributes for product data. This method allows the attribute value to be set differently for each locale directly within the product definition. Utilizing localizable attributes facilitates easy management and localization of product information within the same field across different regions or languages. This approach is more scalable and manageable compared to creating multiple fields for each locale or using separate resource bundles, which are typically more suited for static content that does not vary by product.

The technical report datapoint that best measures the performance of a controller’s script execution, excluding network factors and Web Adaptor processing, is:

Processing time (A): This measures the time taken by the server to execute the script, excluding all external factors such as network delay or client-side processing. It focuses solely on the server-side script execution time, providing a clear indication of the performance of the script itself.

Other options like Cache hit ratio (B), Call count (C), and Response time (D) measure different aspects of system performance and do not exclusively focus on the execution time of scripts on the server.

In Salesforce B2C Commerce, when you need to return a custom status code from a job step, you should use the dw.system.Status class to create and return a new status object with the appropriate status and custom status message. The correct code snippet is option B: var status = require('dw/system/status'); return new Status(Status.OK, 'NO_FILES_FOUND');. This snippet correctly creates a new status object indicating a successful completion (Status.OK) but also communicates the specific outcome of "NO_FILES_FOUND" by using the second parameter of the Status constructor to set a custom status message, aligning with the API's way of handling custom statuses.

In Salesforce B2C Commerce, when a custom log file reaches its file size limit, the system automatically handles the file to ensure continued logging without data loss:

Option C: The current log file is archived and a new log file is created is the correct response. This process is part of the log file rotation mechanism implemented in the platform, ensuring that log files are kept to a manageable size and archived for record-keeping before starting a new file. This helps in maintaining performance and manageability of log files.

Option A is incorrect because the log file is not deleted but archived. Option B and D are inaccurate descriptions of the logging system's behavior regarding file size limits.

In Salesforce B2C Commerce, encountering a quota limit typically suggests that a certain resource or operation limit set in Business Manager is being exceeded. This could be API calls, bandwidth, or CPU usage, among others. The best approach is to address the root cause of the quota overage. Rewriting or optimizing the code to reduce resource consumption or the frequency of operations can help stay within the quota limits. Changing configuration settings or removing limits might not always be possible due to governance or performance stability reasons. Taking no action could lead to continued interruptions in service or functionality. Therefore, the most effective and sustainable solution is to modify the code to adhere to established quotas.

For a developer to integrate an external application for managing store information with the B2C Commerce Staging instance, the appropriate technique is to use a POST request to the Stores Data OCAPI. This approach is used to create new store entries in the system. POST requests are standard for creating new resources in RESTful APIs, including the OCAPI used by Salesforce Commerce Cloud, which aligns with the method's definition and intended use for adding new data to a collection of resources.

For displaying a banner on two different category pages with independent configurations by the merchant, Option C is the best approach. This code snippet uses the <iscontent> tag with a global context and specifies the object directly using pdict.ProductSearchResult.category. This approach ensures that the content is dynamically associated with the category being viewed, allowing for specific content configuration for each category page through the Business Manager. It provides flexibility and precise control over the content displayed on each category page, aligning with best practices for dynamic content display in Salesforce B2C Commerce.

In Salesforce B2C Commerce, caching plays a vital role in enhancing performance by storing content that can be reused for multiple requests without the need to regenerate it. The Storefront Reference Architecture (SFRA) provides specific mechanisms to manage caching effectively through its server-side JavaScript controllers.

Here, we are considering different ways to implement caching for a route in an SFRA controller:

Option A:

server.get('Show', cache.applyDefaultCache, function (req, res, next) { // code });

This snippet correctly demonstrates the best practice for applying caching in SFRA. The cache.applyDefaultCache method is used as middleware in the route setup. This middleware approach is clean and in line with SFRA practices, allowing the caching behavior to be clearly defined and consistently applied before the controller logic executes.

Option B:

html

While this tag is used to define caching within ISML templates and specifies that the content should be cached for 24 hours, it does not affect the caching of controller responses directly. This snippet is not suitable for implementing caching in server-side routes but rather in the presentation layer for specific segments of a page.

Option C:

javascript

This snippet attempts to chain the caching method as an application after defining the route. This approach, however, is incorrect and does not conform to SFRA's practices or JavaScript's syntax. Middleware functions like cache.applyDefaultCache should be included as part of the route definition, not chained afterward.

Given the context and adherence to SFRA best practices, Option A is the correct and recommended way to add caching to an existing page. This method integrates caching as middleware, ensuring that it is processed appropriately within the request lifecycle and aligns with SFRA's structured approach to route management and caching.