Fill in the blank in context of software system architecture:
In _______ architecture, the processing of the data in a system is organized so that each processing component is discrete and carries out one type of data transformation. The data flows from one component to another for processing.

Question

Fill in the blank in context of software system architecture: 
In _______ architecture, the processing of the data in a system is organized so that each processing component is discrete and carries out one type of data transformation. The data flows from one component to another for processing.

Accepted Answer

The correct option is (1):
The **Pipe and filter** architectural pattern perfectly matches the description because its core structure is designed for sequential data processing. In this model, the "processing components" are called **filters**, and they are inherently discrete, self-contained units that each perform one specific type of data transformation, such as parsing, validation, or formatting. The connection between these filters is provided by **pipes**, which act as unidirectional conduits for the data stream to flow from the output of one filter directly to the input of the next. This arrangement ensures a clear separation of concerns, promotes high reusability of the filters, and facilitates the step-by-step, orderly transformation of input data into a final output, exactly as the question describes.

The incorrect option is (2):
Repository architecture, also known as data-centered architecture, focuses on a central, shared data store (the repository) that is accessed by multiple independent components. The primary design goal is data integrity and sharing, where active components interact *through* the passive, centralized data store. Unlike the pipeline model, there is no predetermined, linear flow of data transformation; components access and modify the data in a decoupled manner based on external or internal triggers. Therefore, it does not describe a sequential data flow passing from one discrete transformer to the next.

The incorrect option is (3):
Layered architecture structures a system into a hierarchy of conceptual layers (e.g., presentation, business, persistence) where a higher layer requests services from a lower layer. While components within a layer are discrete, the primary interaction is typically a structured request-response mechanism, such as a function call, between adjacent layers. This model is focused on separating structural responsibilities to manage system dependencies and complexity, not on streaming a single data set through a series of discrete, single-purpose data transformation steps.

The incorrect option is (4):
The Client-Server architectural pattern is fundamentally a distributed computing model that divides a system into a service **client** that requests resources and a service **server** that manages and provides them. This pattern is primarily concerned with distributing the responsibilities and computational workload across a network, focusing on remote communication and access. It does not specify or require a sequential structure where a single data set is processed through a chain of multiple, discrete transformation components.