JMR Infotech Interview Questions and Answers

Q1. What does IOC stand for and what is its significance?
Ans. 
IOC stands for Inversion of Control, a design principle that enhances modularity and testability in software development.
• IOC allows for better separation of concerns, making code easier to manage.

• It promotes loose coupling between components, enhancing flexibility.

• Commonly implemented using Dependency Injection (DI) frameworks like Spring.

• Example: Instead of a class creating its dependencies, they are provided external
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Q2. What is a Spring Container?
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A Spring Container is a core component of the Spring Framework that manages the instantiation, configuration, and lifecycle of application objects.
• Manages beans: The Spring Container creates and manages the lifecycle of beans defined in the application context.

• Dependency Injection: It supports dependency injection, allowing for loose coupling between components.

• Configuration: Beans can be configured using XML, annotati...read more
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General aptitude questions

Q1. Knowledge based questions
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Q2. Skills based questions
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Q1. Based on Strings, Collections, Spring MVC and Spring related questions
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Q2. Aptitude related, problem solving questions
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Q1. BASIC JAVASCRIPT
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Q2. OBDX RELATED backend and front end
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Q1. Can you explain a challenging project you worked on and how you handled it?
Ans. 
I led a cross-functional team to streamline a client’s supply chain process, overcoming resistance and achieving significant cost savings.
• Identified inefficiencies in the supply chain through data analysis and stakeholder interviews.

• Facilitated workshops to gather input from team members and foster collaboration.

• Developed a detailed project plan with clear milestones and responsibilities.

• Implemented a pilot program to ...read more
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Q2. What technologies have you worked with and how do they apply to out projects?
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Q1. What are the key principles of oops
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Object-Oriented Programming (OOP) is based on four key principles: encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class). Example: A 'Car' class with properties like 'color' and methods like 'drive()'.

• Inheritance: Mechanism to create a new class using properties and methods of an existing class. Example: 'ElectricCar' ...read more
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Q2. Explain SDLC process
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SDLC is a structured process for developing software, ensuring quality and efficiency through defined phases.
• 1. Requirement Analysis: Gather and analyze user needs. Example: Conducting surveys to understand user requirements for a new app.

• 2. Planning: Define project scope, resources, and timelines. Example: Creating a project plan with milestones for a software release.

• 3. Design: Create system architecture and design s...read more
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Q3. Explain the event loop in js
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The event loop in JavaScript manages asynchronous operations, allowing non-blocking execution of code.
• JavaScript is single-threaded, meaning it can execute one command at a time.

• The call stack keeps track of function execution; when a function is called, it's pushed onto the stack.

• Web APIs (like setTimeout, fetch) handle asynchronous tasks and push callbacks to the callback queue once completed.

• The event loop continuou...read more
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Q4. What is dependency injection in angular
Ans. 
Dependency Injection in Angular is a design pattern that allows a class to receive its dependencies from external sources rather than creating them itself.
• Promotes code reusability and testability by decoupling components.

• Angular uses an injector to manage the creation and lifecycle of services.

• Example: A service can be injected into a component's constructor: constructor(private myService: MyService) {}

• Supports hierar...read more
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