100+ Module Lead Interview Questions and Answers

Answers to interview questions for Module Lead position

• 1) Azure storage architecture includes Blob storage and Cloud Services

• 2) Web API integration for email and SMS applications involves sending requests to the API endpoints

• 3) .NET Core aspects for solid programming implementation and integration concepts include dependency injection and middleware

• 4) Encryption is the process of converting data into a secure form, while encoding is the process of converting data into a speci...read more

Questions related to Power BI

• Calculate function is used to create new columns based on a formula while filter function is used to filter data based on a condition.

• Pivot table is used to summarize and aggregate data while unpivot table is used to transform data from wide to long format.

• Optimization techniques include reducing data model size, using calculated columns instead of measures, and minimizing data refresh frequency.

• Types of gateways include personal, on-premises, and...read more

Answers to Power BI related questions.

• sum function adds up the values in a column, while sumx function adds up the result of an expression evaluated for each row in a table

• X Velocity is a feature in Power BI that allows for faster data processing and analysis

• Types of filters in Power BI include visual level filters, page level filters, and report level filters

• Types of connection mode in Power BI include Import, DirectQuery, and Live Connection

Answering questions related to VMware, BSOD, troubleshooting, and patching tools.

• VMware is a virtualization software that allows multiple operating systems to run on a single physical machine.

• Standard switch is a virtual switch that connects virtual machines to the physical network, while DV switch is a distributed virtual switch that allows for centralized management of network configurations.

• BSOD stands for Blue Screen of Death, which is an error screen displayed on Windows...read more

Explanation of plugins, factory, dependency injection, REST API, and UI components and how to resolve queries related to them.

• Plugins are software components that add specific functionality to an existing application.

• A factory is a design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

• Dependency injection is a technique where an object receives its dependencies from an external s...read more

Dependency injection is a design pattern where objects are passed as dependencies rather than being created within a class.

• Reduces coupling between classes

• Increases testability and maintainability

• Allows for easier swapping of dependencies

• Examples: Constructor injection, Setter injection, Interface injection

Function App is a serverless compute service that enables you to run code on demand. Logic App is a workflow automation service.

• Function App is used to run code on demand without worrying about infrastructure

• Logic App is used to automate workflows and integrate systems

• Function App supports multiple languages and platforms

• Logic App has a visual designer to create workflows

• Example: A Function App can be used to process data from a queue

• Example: A Logic App can be used to automa...read more

The application lifecycle in ASP.NET MVC involves several stages from initialization to disposal.

• The application starts with the Application_Start event in Global.asax

• The request is then routed to the appropriate controller and action

• The controller processes the request and returns a view

• The view is rendered and returned to the client

• The application can be configured to use various middleware and services

• The application can be monitored and debugged using tools like Visual St...read more

Indexing in SQL is a way to optimize database performance by creating a data structure that allows for faster retrieval of data.

• Indexing is a technique used to quickly locate and access the rows in a database table.

• It works by creating an ordered list of values from one or more columns in a table.

• By using indexes, the database engine can quickly find the rows that match a certain condition without having to scan the entire table.

• Indexes are especially useful for tables with a...read more

Calculate and filter functions in Power BI are used for performing calculations and filtering data in reports.

• Calculate function is used to create new calculated columns or measures based on existing data in Power BI.

• Filter function is used to apply filters to data in Power BI reports to display specific information.

• Examples: CALCULATE(SUM(Sales[Amount]), 'Date'[Year]=2021) - calculates total sales amount for the year 2021.

• FILTER('Product', 'Product'[Category] = 'Electronics'...read more

Email Studio is a Salesforce tool for creating and sending personalized emails to targeted audiences.

• Create an email in Email Studio using drag-and-drop tools or HTML coding

• Select a targeted audience using Salesforce data

• Preview and test the email before sending

• Schedule or send the email to the selected audience

• Track email performance and engagement metrics

Middleware in ASP.NET Core is software that sits between the web server and the application, handling requests and responses.

• Middleware is a pipeline of components that can be added to the application's request processing pipeline.

• Each middleware component can handle a specific aspect of the request/response cycle.

• Examples of middleware include authentication, logging, and routing.

• Middleware can be added to the pipeline using the Use() method in the Startup class.

• Middleware c...read more

Journey Builder is a tool in Salesforce Marketing Cloud that allows marketers to create and automate personalized customer journeys.

• Journey Builder is a drag-and-drop tool that enables marketers to create and manage customer journeys.

• It allows marketers to define the steps a customer takes in their journey, such as sending emails, SMS messages, or push notifications.

• Journey Builder also allows for real-time personalization based on customer behavior and preferences.

• Elements o...read more

Entity framework supports left/right join to pull details from joinee table.

• Use LINQ to perform left/right join in Entity framework

• Use DefaultIfEmpty() method to perform left join

• Use join...into statement to perform right join

• Example: var result = from employee in context.Employees

• join department in context.Departments on employee.DepartmentId equals department.Id into empDept

• from department in empDept.DefaultIfEmpty() select new { employee.Name, department.Name }

With sharing and without sharing are keywords used in Apex to specify sharing rules for a class.

• With sharing enforces the sharing rules of the current user, while without sharing ignores them.

• With sharing is used for classes that access or modify data that belongs to multiple users, while without sharing is used for utility classes or classes that only access data owned by the current user.

• With sharing is the default behavior if sharing is not specified.

• Example: A class that ...read more

Yes, I have worked with nUnit framework.

• I have used nUnit for unit testing in C# projects.

• I am familiar with its syntax and assertions.

• I have integrated nUnit with Visual Studio for continuous testing.

• I have used nUnit to test both simple and complex scenarios.

• For example, I used nUnit to test a payment processing system.

• I also used nUnit to test a complex algorithm for data analysis.

Field level securities in Aura components

• Use Lightning Data Service to enforce CRUD and FLS

• Use Apex to enforce additional security logic

• Use Lightning Design System to control visibility of fields

• Use custom validation rules to enforce business logic

• Use sharing rules to control record access

Create a color palette to apply chosen color to div background using HTML, CSS, and JS.

• Create a color palette with different color options

• Use JavaScript to apply the chosen color to the background of the div

• Update the background color of the div dynamically based on user selection

To come up to speed with SAP system, I would suggest a combination of training, hands-on experience, and seeking guidance from experienced colleagues.

• Attend SAP training sessions to learn the basics and advanced features

• Get hands-on experience by working on SAP projects and practicing on a sandbox system

• Seek guidance from experienced colleagues or mentors who have worked on SAP projects before

• Read SAP documentation and user manuals to understand the system better

• Join SAP user...read more

Answering technical questions on Linux, SQL server, and Java.

• Command in Linux: ls - lists files and directories in a directory

• Indexing in SQL server: improves query performance by reducing the number of disk I/O operations

• Thread dump in core Java: a snapshot of all the threads that are currently executing in a Java Virtual Machine (JVM)

• Difference between di and df in Linux: di shows disk usage by inode while df shows disk usage by file system

UNION combines the result sets of two or more SELECT statements, while UNION ALL does the same but includes duplicate rows.

• UNION removes duplicate rows from the result set, while UNION ALL includes all rows

• UNION is slower than UNION ALL because it performs a distinct operation

• UNION requires that all SELECT statements have the same number of columns with compatible data types

• Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;

• Example: SELECT column1 FROM table...read more

Docker is a containerization platform that allows developers to package, deploy, and run applications in isolated environments.

• Docker uses containerization to create lightweight, portable environments for applications

• Docker images are built using Dockerfiles, which specify the application and its dependencies

• Docker build command: docker build

• Docker containers can be run locally or in the cloud, and can be easily scaled up or down

• Docker Hub is a repository for Docker images, ...read more

Field-level security can be maintained using profiles, permission sets, and sharing rules.

• Profiles can be used to restrict access to fields for a group of users.

• Permission sets can be used to grant additional access to specific fields for certain users.

• Sharing rules can be used to extend access to fields beyond the default sharing settings.

• Validation rules can also be used to enforce data integrity and security at the field level.

A real-time example of object-oriented programming with inheritance, encapsulation, and polymorphism.

• A car is an object that inherits properties from a vehicle class

• Encapsulation ensures that the car's internal workings are hidden from the user

• Polymorphism allows the car to have different behaviors based on the context

• For example, a car can be a sports car or a family car, each with different properties and behaviors

Code to throw ConcurrentModificationException and how to avoid it

• Iterating over a collection and modifying it at the same time can throw ConcurrentModificationException

• To avoid it, use Iterator to iterate over the collection and then modify it

• Alternatively, use ConcurrentHashMap or CopyOnWriteArrayList for thread-safe iteration

Endpoints are URLs that clients use to access resources in a WebAPI.

• Endpoints are the entry points for a WebAPI.

• They define the resources that can be accessed by clients.

• Endpoints are identified by a URL and HTTP method.

• Examples of endpoints include /api/users and /api/products.

• Endpoints can have parameters that are passed in the URL or request body.

Partitions in Informatica help in parallel processing and improving performance.

• Partitions in databases and Informatica serve different purposes

• Informatica partitions help in parallel processing of data

• Improves performance by distributing data processing across multiple nodes

• Allows for better resource utilization and faster data processing

• Example: Partitioning in Informatica can be used to process large volumes of data efficiently

sum vs sumx in Power BI, x-Velocity, optimization techniques, project-related questions

• sum is an aggregation function that calculates the total of a column, while sumx is an iterator function that performs a calculation for each row and then aggregates the results

• x-Velocity is a feature in Power BI that optimizes data storage and query performance by compressing and indexing data

• Optimization techniques in Power BI include data modeling, query optimization, and performance tun...read more

Static and transient keywords are used in Java programming language for different purposes.

• Static keyword is used to create class-level variables and methods that can be accessed without creating an instance of the class.

• Transient keyword is used to indicate that a variable should not be serialized when the object is converted to a byte stream.

• Static variables are shared among all instances of a class, while transient variables are not included in the serialization process.

• St...read more

Display flex is for one-dimensional layouts, while display grid is for two-dimensional layouts.

• Display flex is used for creating layouts in one direction (either row or column)

• Display grid is used for creating layouts in two dimensions (rows and columns)

• Flexbox is more suitable for small-scale layouts, while Grid is better for larger layouts with more complex structures

DI can be achieved through method, constructor, and property level patterns.

• Method level DI involves passing dependencies as method parameters.

• Constructor level DI involves passing dependencies as constructor parameters.

• Property level DI involves setting dependencies as properties of an object.

• Examples of DI frameworks that use these patterns include Spring and Unity.

• Choosing the appropriate pattern depends on the specific use case and design considerations.

Microservice design patterns are architectural patterns that help in designing and implementing microservices.

• Service Decomposition

• API Gateway

• Service Registry

• Circuit Breaker

• Saga Pattern

To create project structure using Maven in AEM, follow these steps:

• Create a new Maven project in Eclipse or any other IDE

• Add AEM dependencies in the pom.xml file

• Create a content package using the AEM Maven Archetype

• Add the content package to the project structure

• Build the project using Maven

• Deploy the project to AEM using Maven or Package Manager

ASP.NET MVC uses routing mechanism to map incoming requests to appropriate controller actions.

• Routing is responsible for URL mapping and pattern matching.

• Routes are defined in RouteConfig.cs file.

• Default route maps to {controller}/{action}/{id} pattern.

• Attribute routing allows defining routes at the controller or action level.

• Route constraints can be used to restrict the values of route parameters.

force:createRecord allows creation of records without Apex code.

• Saves time and effort by eliminating the need for Apex code

• Allows for easy creation of records from custom or standard objects

• Can be used in Lightning Experience, Salesforce mobile app, and Communities

• Can prepopulate fields with default values

• Can be used with custom Lightning components

• Example: Creating a new Account record from a custom Lightning component

The project follows a microservices architecture.

• The project is divided into small, independent services that communicate with each other through APIs.

• Each service is responsible for a specific task or functionality.

• The architecture allows for scalability, flexibility, and easier maintenance.

• Examples of microservices used in the project include user management, payment processing, and inventory management.