MAQ Software interview questions and how to prepare

1. MAQ is building a cloud-based data ingestion and transformation pipeline for a large enterprise client, moving data from various on-premise systems (SAP, Oracle) to Azure Data Lake Storage, then processing it with Databricks and exposing it via Azure Synapse Analytics for Power BI dashboards. Design the high-level architecture for this pipeline, focusing on scalability, fault tolerance, and data security for PII.

   Software EngineerSystem Design, Azure, Data EngineeringTests: Evaluates candidate's knowledge of Azure data services, distributed systems, security best practices, and enterprise data architecture.

2. A MAQ client's Power BI dashboard, fed by an Azure SQL Database, is experiencing slow load times due to a complex DAX query that joins several large tables. The underlying SQL query runs fast. Describe your systematic approach to identify the bottleneck in the DAX query or Power BI report itself, and suggest specific optimization techniques you would apply.

   Software EngineerDebugging, Performance Optimization, Data AnalyticsTests: Assesses debugging methodology, understanding of Power BI/DAX performance, and data optimization strategies.

3. MAQ often develops custom APIs for clients to integrate disparate systems. Given a scenario where you need to build a secure .NET Core Web API that retrieves sensitive customer data from an Azure Key Vault and then encrypts parts of it before sending to a third-party analytics service via an asynchronous message queue, outline the key components and security considerations you would implement.

   Software EngineerAPI Development, Azure Security, Asynchronous MessagingTests: Checks knowledge of secure API design, Azure services (Key Vault, Service Bus), and data handling best practices.

4. A mission-critical Azure Function developed by MAQ for a financial services client intermittently fails to process transactions, but only under high load during end-of-quarter reporting. The logs show generic timeout errors but no specific code exceptions. Describe your strategy to diagnose and resolve this elusive performance issue in a production environment.

   Software EngineerDebugging, Azure Functions, Performance TroubleshootingTests: Evaluates systematic debugging, understanding of cloud-native performance issues, and production troubleshooting skills.

5. MAQ is asked to design a multi-tenant SaaS platform on Azure for small and medium businesses, offering a simplified version of their enterprise data analytics solutions. How would you architect the data layer to ensure strict data isolation between tenants while optimizing for cost and scalability? Assume clients will upload their own datasets.

   Software EngineerSystem Design, Multi-tenancy, Azure DataTests: Assesses understanding of multi-tenant architecture patterns, data isolation, and cost-effective cloud design.

6. You are tasked with implementing a feature for a client's SharePoint Online portal developed by MAQ. The feature requires a custom web part that fetches and displays real-time stock quotes from an external API, with caching implemented to avoid hitting API rate limits. Describe how you would build this using SharePoint Framework (SPFx) and Azure Functions, including considerations for security and user experience.

   Software EngineerSharePoint Development, API Integration, Caching, AzureTests: Tests knowledge of SPFx, external API integration, caching strategies, and secure development practices.

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