70+ Ecom Express Interview Questions and Answers

Javascript is a single-threaded language, but it can handle asynchronous operations through callbacks and promises.

• Javascript is single-threaded, meaning it can only execute one task at a time.

• However, it can handle asynchronous operations by using callbacks, promises, and async/await.

• Backend calls in Javascript are typically made using asynchronous functions, allowing the program to continue executing other tasks while waiting for the response.

• For example, when making an HTT...read more

A ticket booking system similar to BookMyShow

• User registration and login

• Event listing and selection

• Seat selection and payment

• Confirmation and ticket generation

• Integration with payment gateways

• Admin panel for event and user management

useEffect Hook is a built-in hook in React that allows you to perform side effects in functional components.

• useEffect Hook is used to handle side effects in functional components, such as fetching data, subscribing to events, or manipulating the DOM.

• It takes two arguments: a function that represents the side effect, and an optional dependency array.

• The function passed to useEffect will be executed after every render, unless the dependency array is provided.

• The dependency arra...read more

The duration of Program Increment (PI) in our company is 12 weeks.

• Program Increment (PI) typically lasts for 8-12 weeks in our company

• PI planning occurs at the beginning of each PI

• PI review and retrospective are conducted at the end of each PI

• Example: Our current PI started on January 1st and will end on March 26th

React has three main lifecycle methods: Mounting, Updating, and Unmounting.

• Mounting: These methods are called when an instance of a component is being created and inserted into the DOM.

• Updating: These methods are called when a component is being re-rendered as a result of changes to either its props or state.

• Unmounting: This method is called when a component is being removed from the DOM.

Program Increment is a timebox during which an Agile Release Train delivers incremental value in the form of working, tested software.

• Program Increment is typically a 8-12 week timebox in Agile organizations.

• It is a cadence-based planning and delivery event where teams plan, commit, and deliver value.

• At the end of each Program Increment, a System Demo is conducted to showcase the working software.

• Program Increment helps in aligning all teams towards a common goal and ensures ...read more

The end-to-end R2R process involves all the steps from recording financial transactions to generating financial statements.

• The R2R process starts with recording financial transactions in the general ledger.

• It includes sub-processes like accounts payable, accounts receivable, and fixed asset accounting.

• The process also involves reconciling accounts, closing the books, and generating financial statements.

• S/4 Hana can optimize the R2R process by providing real-time data, automat...read more

The basics in design before coding include understanding requirements, creating a plan, considering user experience, and choosing appropriate technologies.

• Understand the requirements and objectives of the project

• Create a detailed plan or wireframe before starting coding

• Consider user experience and design user-friendly interfaces

• Choose appropriate technologies and frameworks based on project needs

I will assess the impact of the change, communicate with the team, and implement the necessary modifications efficiently.

• Assess the impact of the change on the existing codebase and functionality

• Communicate with the team members to discuss the change and gather their input

• Implement the necessary modifications efficiently to ensure minimal disruption

• Test the updated code thoroughly to ensure it functions correctly

Stay calm, listen actively, empathize, and offer solutions.

• Take a deep breath and remain calm.

• Listen actively to the client's concerns and needs.

• Empathize with the client and acknowledge their frustration.

• Offer solutions that address the client's concerns and needs.

• Communicate clearly and effectively throughout the process.

• Follow up with the client to ensure their satisfaction.

• Maintain a positive and professional attitude.

• Seek guidance from colleagues or superiors if necessar...read more

Yes, it is possible to achieve dynamic picking of values from custom lookup in Oracle Integration Cloud.

• Create a custom lookup table in Oracle Integration Cloud.

• Define the lookup table with the required values.

• Use the dynamic lookup feature in Oracle Integration Cloud to fetch values from the custom lookup table based on specified criteria.

• Map the retrieved values to the target field in the integration flow.

React hooks are functions that allow you to use state and other React features in functional components.

• useState() - for managing state in functional components

• useEffect() - for performing side effects in functional components

• useContext() - for accessing context in functional components

• useReducer() - for managing complex state and actions in functional components

• useCallback() - for memoizing functions in functional components

• useMemo() - for memoizing values in functional comp...read more

npm is the most popular package manager for Node.js and JavaScript.

• npm (Node Package Manager) is the default package manager for Node.js and JavaScript.

• Yarn is an alternative package manager that offers faster and more reliable dependency management.

• pnpm is another package manager that uses a unique approach of hard-linking dependencies to save disk space.

• Bower is a package manager specifically designed for front-end web development.

• NPM Enterprise is a paid package manager wi...read more

MLOps is the practice of combining machine learning with operations to deploy, monitor, and manage ML models in production.

• MLOps focuses on the entire ML lifecycle from development to deployment and monitoring

• It involves automating the process of training, deploying, and managing ML models

• MLOps ensures collaboration between data scientists and operations teams for seamless model deployment

• It includes version control, testing, and continuous integration/continuous deployment (...read more

Challenges include data quality, model interpretability, scalability, and monitoring.

• Data quality issues can lead to biased or inaccurate predictions.

• Interpretability of complex models can be a challenge for stakeholders.

• Scalability concerns arise when deploying models to handle large volumes of data.

• Monitoring the model's performance in real-time is crucial to ensure its effectiveness over time.

Scrum ceremonies are regular meetings in Scrum framework to ensure effective communication and collaboration. They include Sprint Planning, Daily Standup, Sprint Review, and Sprint Retrospective. The Scrum Master facilitates these ceremonies.

• Sprint Planning involves planning the work to be done in the upcoming sprint.

• Daily Standup is a daily meeting where team members discuss their progress and plan for the day.

• Sprint Review is held at the end of the sprint to review the work...read more

Diagnosing slow performance in Oracle Forms in EBS

• Check database performance metrics

• Review server resources utilization

• Analyze network latency

• Examine Oracle Forms configuration settings

• Monitor concurrent processes running in EBS

JavaScript can run on servers using server-side JavaScript platforms like Node.js.

• JavaScript can be executed on servers using server-side JavaScript platforms like Node.js.

• Node.js allows JavaScript to run on the server-side by providing a runtime environment.

• Server-side JavaScript enables developers to build scalable and high-performance web applications.

• Node.js uses the V8 JavaScript engine to execute JavaScript code on the server.

• Server-side JavaScript can handle tasks such...read more

Design a movie ticketing system similar to BookMyShow.

• Create a user-friendly website and mobile app for booking tickets.

• Integrate with multiple cinema chains and showtimes.

• Offer various payment options and discounts.

• Provide real-time seat availability and selection.

• Include features like movie reviews, trailers, and ratings.

• Implement a loyalty program to retain customers.

• Ensure data security and privacy.

• Offer customer support through multiple channels.

• Allow cancellation and re...read more

To break a singleton behavior in Java, you can use reflection to access the private constructor and create multiple instances.

• Use reflection to access the private constructor of the singleton class

• Create multiple instances by calling the private constructor using reflection

I mediated a disagreement between a client and team member by facilitating open communication and finding a compromise.

• Identify the root cause of the conflict

• Encourage open and honest communication between parties

• Facilitate a discussion to find common ground and reach a compromise

• Ensure all parties feel heard and respected throughout the resolution process

Find the maximum number of repeated items in an array of strings.

• Iterate through the array and count the occurrences of each item using a hashmap.

• Track the maximum count while iterating.

• Return the maximum count as the result.

I have faced challenges with integrating legacy systems with modern technologies.

• Integrating outdated systems with new software can be complex

• Ensuring data compatibility and security is crucial

• Need to consider scalability and performance issues

• Examples: Integrating a legacy CRM system with a new marketing automation platform

Oracle EBS is an integrated suite of business applications, while OTM is a transportation management system.

• Oracle EBS is a comprehensive suite of integrated business applications, including modules for financials, supply chain management, human resources, and more.

• OTM (Oracle Transportation Management) is a standalone application focused on managing transportation and logistics operations.

• Oracle EBS is designed for overall business management, while OTM is specifically tailo...read more

IDOCs are data containers used to exchange information between SAP systems and external systems.

• IDOCs are used for exchanging data between different systems in a distributed environment.

• They are structured in a hierarchical format with segments and fields.

• IDOCs can be used for various purposes such as sending purchase orders, invoices, and master data.

• They are processed using IDOC processing programs in SAP.

• IDOCs can be monitored and managed using transaction codes in SAP lik...read more

Use Pyspark for big data processing and distributed computing, use pandas for smaller datasets and data manipulation.

• Use Pyspark for handling large datasets that don't fit into memory

• Use pandas for data manipulation and analysis on smaller datasets that fit into memory

• Pyspark is suitable for distributed computing and processing big data

• Pandas is more efficient for single-node processing and data exploration

• Consider using Pyspark when working with data stored in Hadoop or Spar...read more

Drop ship flow process involves shipping products directly from the manufacturer to the customer.

• The customer places an order with the retailer

• The retailer forwards the order to the manufacturer

• The manufacturer ships the product directly to the customer

• The retailer receives payment from the customer and pays the manufacturer

• The retailer may or may not handle customer service and returns

• Examples include Amazon and Wayfair

Phases of application cloud migration include planning, assessment, migration, testing, and optimization.

• Planning phase involves identifying applications to migrate, setting goals, and creating a migration plan.

• Assessment phase includes evaluating current applications, infrastructure, and dependencies.

• Migration phase involves moving applications and data to the cloud environment.

• Testing phase includes testing migrated applications for functionality, performance, and security....read more

Microservices are a software architectural style that structures an application as a collection of loosely coupled services.

• Microservices break down a large application into smaller, independent services that can be developed, deployed, and scaled independently.

• Common design patterns used in microservices architecture include Service Registry, Circuit Breaker, API Gateway, and Event Sourcing.

• Service Registry pattern helps services locate and communicate with each other.

• Circui...read more

SDLC involves planning, designing, developing, testing, and deploying software.

• 1. Planning: Define project scope, requirements, and objectives.

• 2. Design: Create a detailed design of the software architecture.

• 3. Development: Write code based on the design specifications.

• 4. Testing: Conduct various tests to ensure the software functions correctly.

• 5. Deployment: Release the software to users and provide support.

• 6. Maintenance: Regularly update and maintain the software to meet c...read more

Capacity planning is the process of determining the production capacity needed by an organization to meet changing demands for its products.

• Capacity planning involves forecasting future capacity requirements based on current and projected business needs.

• It helps in identifying potential bottlenecks and ensures that resources are utilized efficiently.

• Factors considered in capacity planning include production capacity, workforce capacity, and equipment capacity.

• Examples of capa...read more

System refresh is the process of copying a production system to a non-production system.

• System refresh is done to keep the non-production system up-to-date with the production system.

• It involves copying the entire system landscape including data, configurations, and customizations.

• System refresh can be done manually or using automated tools like SAP Landscape Transformation.

• It is important to test the refreshed system thoroughly before using it for development or testing purp...read more

To run a BIP report using OIC, you need to create a connection to the BIP server and then configure a BIP report job in OIC.

• Create a connection to the BIP server in OIC.

• Configure a BIP report job in OIC, specifying the report to run and any parameters needed.

• Schedule the BIP report job to run at the desired frequency.

• Monitor the job status and view the generated report in OIC.

The biggest risk to a project is poor communication.

• Poor communication can lead to misunderstandings and delays.

• Lack of clear communication can result in misalignment of goals and objectives.

• Inadequate communication can lead to conflicts and issues not being addressed in a timely manner.

• Communication breakdowns can hinder collaboration and coordination among team members.

• Failure to communicate effectively with stakeholders can result in missed expectations and dissatisfaction...read more

Models in production are monitored through automated alerts, performance metrics, and regular reviews.

• Set up automated alerts to notify of any anomalies or errors in the model's predictions

• Track performance metrics such as accuracy, precision, recall, and F1 score regularly

• Conduct regular reviews of the model's outputs and compare them to expected results

• Implement version control to track changes and updates to the model

I have extensive experience in technical data center consolidation, including planning, implementation, and optimization.

• Led a team in consolidating multiple data centers into a single, more efficient facility

• Implemented virtualization technologies to maximize server utilization and reduce physical hardware

• Utilized cloud services to offload non-critical workloads and reduce on-premises infrastructure

• Worked closely with stakeholders to ensure minimal disruption during the cons...read more

Interest during construction refers to the interest paid on a loan taken out to finance the construction of a building or project.

• Interest during construction is typically paid on a monthly basis and is calculated based on the amount of the loan and the interest rate.

• This type of financing is commonly used in real estate development projects.

• For example, if a developer takes out a $10 million loan to build a new office building and the interest rate is 5%, they would pay $50,...read more

A separate document that provides details of a payment made or received.

• It contains information such as the date of payment, amount, and invoice number.

• It is usually sent along with a payment or invoice.

• It helps to reconcile accounts and track payments.

• It can be in paper or electronic format.

• Example: A vendor sends a separate remittance advice along with an invoice to a customer.

I plan sprints by prioritizing tasks, estimating effort, assigning resources, setting goals, and monitoring progress.

• Prioritize tasks based on importance and dependencies

• Estimate effort required for each task

• Assign resources based on skillset and availability

• Set specific goals for the sprint

• Monitor progress regularly and adjust as needed

I approach conflicts by actively listening, understanding perspectives, and finding common ground for resolution.

• Actively listen to all parties involved to understand their perspectives

• Stay calm and composed to avoid escalating the conflict

• Seek common ground and areas of agreement to find a resolution

• Communicate effectively and respectfully to address concerns

• Consider alternative solutions and compromise if necessary

CPI is a cloud integration platform while PI PO is a middleware platform for integrating SAP systems.

• CPI is a cloud-based integration platform provided by SAP for connecting cloud applications and on-premise systems.

• PI PO (Process Integration/Process Orchestration) is an on-premise middleware platform used for integrating SAP systems.

• CPI is more suitable for cloud-to-cloud and cloud-to-on-premise integrations, while PI PO is better for on-premise integrations within an SAP la...read more

Story points are a relative measure of effort required to implement a user story, not directly correlated to time.

• Story points are based on complexity, effort, and risk involved in a user story.

• They are not meant to represent actual time taken to complete a task.

• Team consensus is used to assign story points during sprint planning.

• Example: A user story might be assigned 5 story points based on complexity, even though it may take 2 days to complete.

Memory management in Java involves automatic memory allocation and garbage collection.

• Java uses automatic memory management to allocate and deallocate memory for objects.

• Garbage collection is the process of automatically reclaiming memory occupied by objects that are no longer in use.

• Java provides the 'finalize()' method to allow an object to perform cleanup actions before it is garbage collected.

HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.

• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed again to find the corresponding index and then the linked l...read more

SAP EWM integrates with PP & QM for seamless production and quality management processes.

• SAP EWM integrates with Production Planning (PP) for efficient production scheduling and execution.

• Integration with Quality Management (QM) ensures that quality checks are performed during warehouse operations.

• Real-time data exchange between EWM, PP, and QM improves visibility and decision-making.

• Examples: EWM can trigger production orders in PP based on warehouse stock levels, and QM can...read more

End to end deployment over cloud involves deploying an application or system from start to finish using cloud services.

• Plan the deployment process including resource allocation and configuration

• Use automation tools like Ansible or Terraform for consistent deployment

• Monitor the deployment for any issues and scale resources as needed

• Implement security measures to protect data and applications

• Consider factors like cost, scalability, and performance during deployment

• Examples: Dep...read more

The overall process in my current organization involves a structured approach to project management and client communication.

• We follow a project management methodology such as Agile or Waterfall depending on the project requirements.

• Regular client communication is maintained through weekly status calls and progress reports.

• We have a well-defined process for change management and issue resolution.

• Documentation and knowledge sharing are emphasized to ensure continuity of work.

• P...read more

I am proficient in Java with experience in developing various applications.

• I have been working with Java for over 5 years

• I have developed multiple applications using Java, including a web-based inventory management system

• I am familiar with various Java frameworks such as Spring and Hibernate

• I keep myself updated with the latest Java technologies and trends

EBS is a process of congratulating employees on their achievements and milestones.

• EBS stands for Employee Benefits and Services

• It is a program designed to recognize and reward employees for their hard work and dedication

• It includes benefits such as health insurance, retirement plans, and paid time off

• EBS also includes recognition programs such as employee of the month and service awards

• By congratulating employees on their achievements, EBS helps to boost morale and increase e...read more

Reducing latency involves optimizing network performance and minimizing delays in data transmission.

• Optimize network infrastructure by upgrading hardware and software

• Use content delivery networks (CDNs) to cache data closer to end users

• Implement data compression techniques to reduce file sizes and transmission times

• Utilize load balancing to distribute network traffic evenly across servers

• Minimize unnecessary network hops and reduce packet loss

Driver is a software component that enables communication between hardware and software, while an Agent is a software component that performs tasks on behalf of a user or another program.

• Driver facilitates communication between hardware and software (e.g. printer driver)

• Agent performs tasks on behalf of a user or program (e.g. email agent)

• Drivers are typically specific to hardware devices, while agents can be more general-purpose

• Drivers are often low-level components, while a...read more

A service worker is a script that runs in the background of a web page, separate from the main browser thread, enabling features like push notifications and offline functionality.

• Service workers are event-driven, meaning they are triggered by specific events like network requests or push notifications.

• They can intercept and modify network requests, allowing for offline caching and faster loading times.

• Service workers are commonly used in progressive web apps to provide a more...read more

Profiles control overall access to objects, fields, and records, while permission sets grant additional permissions to specific users.

• Profiles are used to control overall access to objects, fields, and records in Salesforce.

• Permission sets are used to grant additional permissions to specific users, on top of what is already defined in their profile.

• Profiles are assigned to users when they are created, while permission sets can be assigned at any time.

• Profiles are more rigid a...read more

The UK Bribery Act is a legislation that criminalizes bribery and corruption in the UK and abroad.

• The act came into force in 2011 and applies to individuals and companies in the UK.

• It includes four main offenses: offering, promising, or giving a bribe; requesting, agreeing to receive, or accepting a bribe; bribery of a foreign public official; and failure of a commercial organization to prevent bribery.

• The act has extraterritorial jurisdiction, meaning that individuals and co...read more

JVM architecture is the structure of the Java Virtual Machine, consisting of class loader, memory areas, execution engine, and native method interface.

• JVM is divided into class loader, runtime data areas, execution engine, and native method interface.

• Class loader loads class files into memory.

• Runtime data areas include method area, heap, stack, and PC register.

• Execution engine executes bytecode instructions.

• Native method interface allows JVM to interact with native libraries.

Monitoring ML model in production involves tracking model performance, data drift, and making necessary adjustments.

• Set up monitoring tools to track model performance metrics such as accuracy, precision, recall, and F1 score.

• Monitor data drift by comparing the distribution of incoming data with the training data.

• Implement alerting systems to notify when model performance drops below a certain threshold.

• Regularly retrain the model with new data to ensure it stays accurate and ...read more

A custom roll-up trigger can be created using Apex code to aggregate data from child records to parent records.

• Create a trigger on the child object

• Query the parent records related to the child records

• Aggregate the data from child records and update the parent records

• Consider using batch processing for large data sets

FI MM and FI SD Integration involves linking financial accounting with materials management and sales and distribution modules in SAP.

• FI MM Integration involves posting accounting entries for materials management transactions such as goods receipt, invoice receipt, and goods issue.

• FI SD Integration involves posting accounting entries for sales and distribution transactions such as sales order, delivery, and billing.

• Integration ensures accurate financial reporting by linking f...read more

A service in Angular is a class that encapsulates a specific functionality and can be shared across components.

• Services are used to share data or functionality across multiple components in an Angular application

• Services are typically singleton instances, meaning there is only one instance of a service in the application

• Services can be injected into components, directives, or other services using Angular's dependency injection system

Demand forecasting project involves predicting future demand for products or services based on historical data and market trends.

• Utilize historical sales data to identify patterns and trends

• Consider external factors such as seasonality, economic conditions, and competitor actions

• Use statistical models like time series analysis or machine learning algorithms to forecast demand

• Collaborate with stakeholders from sales, marketing, and operations to gather insights and validate fo...read more

Agile is a project management methodology that emphasizes flexibility, collaboration, and continuous improvement.

• Agile involves breaking down projects into smaller, manageable tasks called sprints.

• It prioritizes customer feedback and adapting to changes quickly.

• Scrum and Kanban are popular frameworks used in agile project management.

• Daily stand-up meetings and retrospectives are common practices in agile teams.

• Agile promotes a culture of transparency, communication, and self-...read more

Story sizing involves breaking down a project into smaller, manageable tasks.

• Use relative sizing (e.g. Fibonacci sequence) to estimate effort required

• Consider complexity, uncertainty, and risk when sizing stories

• Involve the entire team in sizing to ensure accuracy and buy-in

• Revisit and adjust story sizes as needed throughout the project

Bias-variance tradeoff is a key concept in machine learning, balancing model complexity and generalization.

• Bias refers to error from overly simplistic assumptions in the model, leading to underfitting.

• Variance refers to error from model being too complex and fitting to noise in the training data, leading to overfitting.

• Balancing bias and variance is crucial for optimal model performance and generalization.

• Regularization techniques like Lasso and Ridge regression can help cont...read more

The SAP implementation process involves planning, design, configuration, testing, deployment, and support.

• Planning phase involves defining project scope, goals, timeline, and resources.

• Design phase includes creating a blueprint for the system based on business requirements.

• Configuration phase involves setting up the SAP system according to the design.

• Testing phase includes conducting various tests to ensure the system functions correctly.

• Deployment phase involves rolling out ...read more

SAP process for implementation involves planning, configuration, testing, training, and deployment.

• Planning phase involves defining project scope, objectives, and timelines.

• Configuration phase includes setting up SAP system according to business requirements.

• Testing phase ensures that the system functions correctly and meets user needs.

• Training phase involves educating users on how to use the SAP system effectively.

• Deployment phase is the final step where the system is rolled...read more

Validations in ASP.NET MVC

• ASP.NET MVC provides various validation techniques such as Data Annotations, Model Validation, and Client-Side Validation

• Data Annotations are attributes that can be applied to model properties to specify validation rules

• Model Validation is performed on the server-side and can be customized using validation attributes and custom validation logic

• Client-Side Validation is performed on the client-side using JavaScript and can be enabled/disabled using th...read more

Exception handling in web api

• Use try-catch blocks to handle exceptions

• Return appropriate HTTP status codes for different types of exceptions

• Log exceptions for debugging purposes

• Use global exception handling middleware to handle unhandled exceptions

• Provide meaningful error messages to the client

Projects are specific tasks or initiatives undertaken to achieve a particular goal or outcome.

• Projects have defined objectives, timelines, and resources allocated to them.

• They often involve cross-functional teams working together towards a common goal.

• Project management methodologies like Agile or Waterfall are used to plan, execute, and monitor progress.

• Examples: Implementing a new software system, launching a marketing campaign, building a new product prototype.

CORS is a security feature in web API to restrict cross-origin requests.

• CORS stands for Cross-Origin Resource Sharing.

• It is used to restrict cross-origin requests made by web browsers.

• It is implemented in web API using middleware.

• It can be configured to allow specific origins, headers, and methods.

• Example: app.UseCors(options => options.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod());