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

Traverse an array by jumping the number of times the value at that index

• Create a loop to traverse the array

• Use modulo operator to handle circular array

• Jump to the index based on the value at current index

• Repeat until all elements are visited

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

Static binding is resolved at compile time, while dynamic binding is resolved at runtime.

• Static binding is also known as early binding, while dynamic binding is known as late binding.

• Static binding is achieved using method overloading, while dynamic binding is achieved using method overriding.

• Example of static binding: function overloading in C++.

• Example of dynamic binding: method overriding in Java.

The SQL query to fetch the first 5 characters of a string is achieved using the SUBSTRING function.

• Use the SUBSTRING function in SQL to extract the first 5 characters of a string.

• The syntax is: SELECT SUBSTRING(column_name, 1, 5) FROM table_name;

• For example, SELECT SUBSTRING('Hello World', 1, 5) will return 'Hello'.

Main return types in Web API include HttpResponseMessage, IHttpActionResult, and void.

• HttpResponseMessage: Represents an HTTP response message.

• IHttpActionResult: Represents an HTTP response that can be returned from a controller action.

• void: Indicates that the action does not return a value.

Clustered indexes physically order the data in the table, while non-clustered indexes do not.

• Clustered indexes determine the physical order of data in the table, while non-clustered indexes do not.

• Clustered indexes are faster for retrieval of data, as they eliminate the need for sorting, while non-clustered indexes require an additional lookup step.

• Tables can have only one clustered index, but multiple non-clustered indexes.

• Examples: In a phone book, the entries are physicall...read more

Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.

• Abstract class can have constructors, member variables, and methods with implementation.

• Interface can only have abstract methods and constants.

• A class can implement multiple interfaces but can only extend one abstract class.

• Example: Abstract class - Animal with abstract method 'eat', Interface - Flyable with method 'fly'.

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

SQL injection is a type of cyber attack where malicious SQL code is inserted into input fields to manipulate a database.

• SQL injection is a common web application security vulnerability.

• Attackers can inject malicious SQL code into input fields to access or manipulate database data.

• This can lead to unauthorized access, data leakage, data manipulation, and even complete database compromise.

• Example: Entering ' OR '1'='1' into a login form to bypass authentication.

Using SETLL in RPGLE to read duplicate records involves positioning the file pointer and handling duplicates effectively.

• Use SETLL to position the file pointer to the first occurrence of the key.

• After positioning, use READ to fetch the record.

• To find duplicates, continue reading until the key changes.

• Example: If reading a customer file, SETLL on customer ID, then READ in a loop to find all records with the same ID.

React component lifecycle methods control the behavior of components during creation, updating, and destruction.

• Mounting: constructor, render, componentDidMount

• Updating: render, componentDidUpdate

• Unmounting: componentWillUnmount

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

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

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

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

Factory Pattern can be used to create objects without exposing the instantiation logic to the client.

• Used when a class can't anticipate the class of objects it must create

• Helps in creating objects without specifying the exact class of object that will be created

• Encapsulates object creation logic in a separate class

• Promotes loose coupling between classes

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

Kafka topics store messages with offsets; data retention is managed via configurations.

• Kafka topics are categories where records are published.

• Each record in a topic has a unique offset, which is its position in the topic.

• Offsets are sequential and allow consumers to track their read position.

• Data retention duration can be configured using 'retention.ms' or 'retention.bytes'.

• For example, setting 'retention.ms' to 604800000 retains data for 7 days.

Synthetic events in React are cross-browser wrappers around the browser's native events.

• Synthetic events are created by React to normalize browser events and ensure consistent behavior across different browsers.

• They are instances of SyntheticEvent, which is a cross-browser wrapper around the browser's native event.

• Synthetic events have the same interface as native events but are implemented independently to work consistently across all browsers.

• They are used in React to handl...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

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

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

• Create a color palette using HTML elements like buttons or input type color

• Use JavaScript to apply the selected color to the background of a div

• Update the div background color dynamically on color 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