面试题与答案

Pega's architecture consists of the PegaRULES Process Commander (PRPC), Pega database, and PegaRULES runtime engine.

Example:

The PRPC is where business rules and processes are defined, while the runtime engine executes these processes.

Activities are procedural steps, while Flows represent a sequence of processing steps. Flows are more visual and can include decision and subflows.

Example:

An Activity may perform calculations, while a Flow guides the overall process flow.

The Pega Clipboard is used for debugging and monitoring, allowing developers to inspect and analyze data during runtime.

Example:

Developers can view property values, step page details, and analyze rule execution on the Clipboard.

Agents in Pega are background processes that perform tasks at scheduled intervals. They help automate and optimize system functions.

Example:

An Agent may be configured to send email notifications or perform data cleanup tasks regularly.

A Data Page is a reusable container for holding data retrieved from an external source. It enhances performance by caching and sharing data.

Example:

A Data Page can store customer information fetched from a database for quick access in multiple processes.

Pega provides a Case Management framework that allows organizations to define, automate, and optimize their unique business processes.

Example:

A case may represent a customer service request, and Pega guides the case through various stages until resolution.

Declarative Rules in Pega allow developers to specify what to do, rather than how to do it. Examples include Declare Expressions and Declare Constraints.

Example:

A Declare Expression may calculate a property value based on other property values without the need for custom code.

A Pega Class represents a category or type of work. It is used to organize and group rules and data instances related to a specific business concept.

Example:

In a banking application, a class 'LoanRequest' may contain rules and data instances related to loan processing.

Agents perform background processing, while Listeners wait for external events and trigger actions when specific conditions are met.

Example:

An Agent may process pending loan approvals, while a Listener may react to incoming emails and create corresponding cases.

A Work Item is a single task or assignment within a business process, while a Work Object represents the entire case or process instance.

Example:

In a customer service application, a Work Item could be a specific support ticket, and the Work Object is the overall customer service case.

Pega Guardrails are best practices and guidelines provided by Pega to ensure efficient and standardized application development.

Example:

Following Guardrails helps in creating applications that are maintainable, scalable, and adhere to Pega's recommended practices.

Pega provides robust security features, including authentication, authorization, and encryption. Access can be controlled through roles and privileges.

Example:

A manager role may have permission to approve high-value transactions, while a regular user role may only view transaction history.

Pega supports various decision rules, including Decision Tables, Decision Trees, and Decision Maps, which allow developers to model and implement complex decision logic.

Example:

A Decision Table may define eligibility criteria for a promotional offer based on customer attributes.

Pega provides a Mobile App Accelerator and responsive design features to create applications that work seamlessly on various devices. The Pega mobile app supports offline capabilities.

Example:

A field service application built with Pega can allow technicians to access and update work orders even without an internet connection.

The Pega Business Rules Engine allows business analysts to define, modify, and manage business rules without extensive coding. It promotes agility and adaptability.

Example:

Business analysts can use the Business Rules Engine to adjust decision logic for promotions without IT intervention.

Pega uses rule versioning to manage changes to individual rules, and application packaging for managing versions of entire applications. Versioning ensures traceability and rollback capabilities.

Example:

Rule versioning allows developers to track and revert changes made to a specific business rule.

Circumstancing in Pega allows for the creation of multiple rule instances with different behavior based on specified conditions. It enables rule specialization without modification.

Example:

A business rule may have different circumstanced versions for different regions or customer segments.

Declare Index in Pega is used to create indexes on properties, improving the performance of queries by allowing faster data retrieval.

Example:

A Declare Index may be created on a customer's last name to speed up searches for customers with specific last names.

Pega provides error handling through exception handling processes and logging through the use of logging activities. It allows developers to capture and analyze errors for debugging.

Example:

An error handling process may notify administrators when a critical system error occurs.