Interview Questions for Azure Logic Apps—Set-II
Here is the updated set of questions and answers that can be helpful for Azure Logic Apps developers:
Previous Questions and Answers—Set-I 👉 https://biztalktechie.com/interview-questions-for-azure-logic-apps-developers/
Table of Contents
Beginner Level
- What is Azure Logic Apps used for?
- It automates workflows across systems, apps, and services using a visual designer.
- How do triggers and actions work in Logic Apps?
- A trigger starts the workflow, and actions are the steps performed after the trigger.
- What is the difference between a consumption plan and a standard plan in Logic Apps?
- The consumption plan is pay-per-execution, while the standard plan offers fixed pricing with isolated environments.
- What is a connector in Azure Logic Apps?
- A connector is a prebuilt API that allows communication with a service (e.g., Office 365, SQL Server).
- Can Logic Apps be version-controlled?
- Yes, using Visual Studio Code or Azure DevOps for integration.
- How can you export a Logic App template?
- By exporting the ARM template from the Azure portal.
- What is the role of the Azure gateway in Logic Apps?
- It enables secure communication between on-premise data sources and Logic Apps.
- What types of triggers exist in Logic Apps?
- Polling triggers (check at intervals) and push triggers (instant initiation).
- What are parallel actions in Logic Apps?
- They allow simultaneous execution of actions in a workflow to improve performance.
- How can you rerun a Logic App?
- Through the Azure portal, in the ‘Run History’ section.
Intermediate Level
- How do you handle errors in Logic Apps?
- Using the ‘Scope’ action with configured ‘Run After’ settings for success or failure.
- What is the retry policy in Logic Apps?
- It’s a setting that defines how many times Logic Apps should retry an action in case of failure.
- How do you manage long-running workflows in Logic Apps?
- By using asynchronous patterns and timeouts to split the workflow into manageable chunks.
- What is the benefit of using Managed Service Identity (MSI) in Logic Apps?
- MSI allows Logic Apps to authenticate with Azure services without hardcoding credentials.
- What are ‘Expressions’ in Logic Apps?
- Expressions are formulas written in Workflow Definition Language (WDL) to manipulate data and control flow.
- Can you call a Logic App from another Logic App?
- Yes, by using the ‘HTTP’ or ‘Logic Apps’ connector.
- What is the difference between built-in connectors and managed connectors?
- Built-in connectors are hosted within Logic Apps, while managed connectors are externally managed by Microsoft.
- How do you implement conditional logic in a Logic App?
- Using the ‘Condition’ action to perform different actions based on specified conditions.
- What are scoped actions in Logic Apps?
- Scoped actions like ‘For Each’ or ‘Until’ control the iteration and looping of actions within workflows.
- Can Logic Apps use custom connectors?
- Yes, you can create and use custom connectors for APIs not natively supported by Logic Apps.
Advanced Level
- How do you handle concurrency control in Logic Apps?
- By configuring the ‘Concurrency Control’ setting for actions like ‘For Each’ loops.
- What is the difference between synchronous and asynchronous patterns in Logic Apps?
- Synchronous processes occur instantly, while asynchronous processes are queued and handled later.
- What is the difference between Logic Apps and Azure Functions?
- Logic Apps are designed for orchestrating workflows, while Functions provide custom code execution within workflows.
- How can you manage stateful versus stateless workflows in Logic Apps?
- Stateful workflows save the state between executions, while stateless ones do not retain any state.
- What is the use of Azure API Management in Logic Apps?
- API Management is used to secure, manage, and expose Logic App workflows as APIs.
- What is the purpose of batching in Logic Apps?
- Batching allows grouping multiple messages for processing in one go, often used in EDI scenarios.
- How do you optimize the performance of Logic Apps?
- By minimizing the number of actions, using parallel execution, reducing loop iterations, and leveraging efficient connectors.
- What is Azure Logic Apps’ integration with Azure Monitor?
- It provides monitoring and alerting capabilities for workflow health and execution.
- How do you ensure idempotency in Logic Apps?
- By handling duplicates, using deduplication patterns, and ensuring the workflow produces the same outcome no matter how many times it’s executed.
- What are the common use cases for Logic Apps in enterprise integration?
- B2B communication, API orchestration, IoT data ingestion, and system-to-system automation.
Expert Level
- How does Logic Apps handle large message payloads?
- Logic Apps supports large messages with limits up to 1 GB and handles them via chunking.
- What is the benefit of using Azure Key Vault in Logic Apps?
- It secures sensitive information like credentials, keys, and connection strings.
- What is the importance of Logic App diagnostics?
- Diagnostics provide insight into workflow health, performance, and troubleshooting.
- How would you architect a scalable Logic Apps solution?
- By designing modular workflows, using retry policies, optimizing connectors, and utilizing the standard pricing plan for larger loads.
- Can Logic Apps use custom code?
- Yes, custom code can be executed by calling Azure Functions or using inline code actions.
- What is the difference between the Logic Apps designer and code view?
- The designer provides a visual interface, while the code view allows editing the underlying JSON or ARM template.
- How do you manage secure communication between Logic Apps and APIs?
- By using OAuth, API keys, or Managed Identities for API authentication.
- What is the role of Webhooks in Logic Apps?
- Webhooks enable event-driven automation by subscribing to HTTP endpoints for real-time updates.
- How do you handle timeouts in Logic Apps?
- Using the ‘Timeout’ settings for each action or trigger to define how long the workflow should wait.
- What is an AS2 connector in Logic Apps?
- It enables secure B2B data exchange using the AS2 messaging protocol, often used in supply chain scenarios.
Special Scenarios and Use Cases
- How do you implement approval workflows in Logic Apps?
- Using actions like ‘Send Approval Email’ with conditional logic to route approvals based on responses.
- What are hybrid connectors, and why are they important?
- Hybrid connectors allow communication between on-premise systems and cloud services, enabling hybrid architecture.
- How does Logic Apps handle message transformation?
- Using built-in transformations like XML to JSON or custom scripts via Azure Functions.
- How can you build Logic Apps in a CI/CD pipeline?
- By using Azure DevOps or GitHub Actions to automate the deployment of Logic Apps via ARM templates.
- How does Logic Apps handle complex conditions?
- By nesting conditions or using ‘Switch’ statements for multi-branching logic.
- What is the benefit of JSON and XML data in Logic Apps?
- JSON and XML are flexible data formats that Logic Apps can easily manipulate and transform.
- How do you integrate Logic Apps with Power Automate?
- Logic Apps can be triggered or called from Power Automate to extend functionality across systems.
- How can Logic Apps be used in the Internet of Things (IoT)?
- By ingesting IoT data, processing it with Logic Apps, and triggering downstream systems for automation.
- What is the difference between Azure Logic Apps and Microsoft Flow (now Power Automate)?
- Logic Apps are enterprise-level workflow services, while Power Automate is more user-friendly, focusing on business users.
- How does Logic Apps handle distributed transactions?
- Using scoped transactions or leveraging other services like SQL Server for handling distributed workflows.