Prev Next

SAP / SAP Senior Level (10+ yrs) Interview questions

What is the difference between in-app and side-by-side extensibility?

In-app extensibility builds custom logic within the S/4HANA system itself, using SAP's released, stable extension points (key user tools, RAP-based custom fields/logic within the ABAP Cloud model). Side-by-side extensibility builds a separate application entirely, running on BTP, that integrates with S/4HANA via APIs rather than living inside the core system at all.

In-AppSide-by-Side
Lives within the S/4HANA system, using released extension points. A separate application on BTP, integrating via APIs.
Good for simpler extensions closely tied to core data/UI. Good for complex, independently-scaling, or non-SAP-specific logic.
Shares the core system's lifecycle/deployment. Independent lifecycle, deployed and scaled separately.

Both remain "clean" as long as they rely only on released extension points/APIs — the choice between them is architectural (how tightly coupled the logic needs to be to the core, how independently it needs to scale or evolve), not a question of which one is inherently more compliant.

Where does in-app extensibility's custom logic live?
What determines the choice between in-app and side-by-side extensibility?

More Related questions...

Why would an enterprise choose a multi-cloud approach over a single hyperscaler for its SAP landscape? What is a multi-cloud architecture strategy in the context of SAP landscapes? What are the trade-offs of running SAP S/4HANA across multiple cloud providers? How do you approach data residency and compliance requirements in a multi-cloud SAP architecture? What role does SAP BTP play in a multi-cloud strategy? How do you manage network connectivity and latency across a multi-cloud SAP landscape? What is vendor lock-in risk, and how does a multi-cloud approach mitigate it for SAP customers? What does "Clean Core" mean in the context of S/4HANA? Why has SAP shifted its architectural guidance toward a Clean Core philosophy? What are the risks of heavy customization (modification) to the SAP core system? How does Clean Core relate to upgradability and cloud readiness? What extensibility options are considered "clean" under this philosophy? How do you assess whether an existing customization violates Clean Core principles? What is the role of the ABAP Cloud programming model in enforcing Clean Core? How do you build a business case for remediating existing core modifications toward a Clean Core state? What is a hybrid SAP landscape? What architectural challenges arise from running SAP systems across on-premise and cloud simultaneously? How do you design data integration between an on-premise S/4HANA system and cloud-based extensions? What is the role of SAP Cloud Connector in a hybrid landscape? How do you manage identity and access management across a hybrid SAP landscape? What are the trade-offs of a phased (hybrid) transition versus a full "big bang" cloud migration? What is SAP BTP (Business Technology Platform)? What are cloud-native extensions in the context of SAP BTP? What is the difference between in-app and side-by-side extensibility? How do you decide which extensibility model to use for a given business requirement? What is the role of SAP Integration Suite in a BTP-based extension architecture? How do you design a scalable, multi-tenant extension application on BTP? What is the significance of the Kyma and Cloud Foundry runtime environments in SAP BTP? How do you approach API management and governance for extensions built on BTP? What are the architectural considerations for event-driven integration using SAP Event Mesh? What is side-by-side extensibility, and when is it the right architectural choice? What are the risks of over-relying on side-by-side extensions? How do you govern a growing portfolio of side-by-side extensions across an enterprise? How does side-by-side extensibility affect total cost of ownership over time? What is the role of API-first design in a side-by-side extensibility strategy? How do you manage versioning and lifecycle for side-by-side extension applications? What is an enterprise transformation roadmap in an SAP context? How do you build a business case for an S/4HANA transformation program? What are the key architectural decision points early in a transformation roadmap? How do you balance business value delivery against technical risk in a multi-year transformation program? What role does a Center of Excellence (CoE) play in a large-scale SAP transformation? How do you sequence a transformation roadmap across multiple business units or regions? What is a cutover strategy in an SAP implementation? What are the key risks to manage during a go-live cutover weekend? What is the difference between a "big bang" and a phased/wave-based go-live approach? How do you design a rollback/contingency plan for a cutover? What role does data migration play in cutover planning, and how do you mitigate its risks? How do you measure go-live success and hypercare effectiveness after cutover?
Show more question and Answers...


Comments & Discussions

Interviews Questions

About Javapedia.net

Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples.

This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company.

Follow Javapedia updates

contact: javatutorials2016[at]gmail[dot]com

Kindly consider donating for maintaining this website. Thanks.

Copyright © 2026, javapedia.net, all rights reserved. · .

DMCA.com Protection Status