Lexmark International Software Engineer Level 1 Interview Questions and Answers

Q1. What is the code for implementing middleware in .NET?
Ans. 
Middleware in .NET can be implemented using the 'UseMiddleware' method in the Startup class.
• Use the 'UseMiddleware' method in the Configure method of the Startup class to add middleware in the request pipeline.

• Create a custom middleware class that implements the 'IMiddleware' interface.

• Register the custom middleware class in the ConfigureServices method of the Startup class.
Answered by AI
Add your answer
Q2. What are the common exceptions encountered in middleware?
Ans. 
Common exceptions encountered in middleware include timeout errors, connection errors, and invalid input errors.
• Timeout errors occur when a request takes too long to process.

• Connection errors happen when there is a problem connecting to a database or external service.

• Invalid input errors occur when the data provided does not meet the expected format or criteria.
Answered by AI
Add your answer
Q3. What is change detection in Angular?
Ans. 
Change detection in Angular is the process of detecting changes in the application state and updating the view accordingly.
• Angular uses change detection to keep the UI in sync with the application state.

• It compares the current state of the application with the previous state to determine what has changed.

• If a change is detected, Angular updates the view to reflect the new state.

• Change detection can be triggered by user...read more
Answered by AI
Add your answer
Q4. What is the use of the Subject in Angular?
Ans. 
Subject in Angular is used for multicasting observables to multiple subscribers.
• Subject is a type of Observable that allows values to be multicasted to multiple Observers.

• It acts as both an Observable and an Observer.

• Subjects are hot Observables, meaning they start emitting values immediately upon creation.

• Example: const subject = new Subject(); subject.next(1); subject.subscribe(value => console.log(value)); // Out
Answered by AI
Add your answer

First round was aptitude round.

Q1. Second round was technical interview
Add your answer
Q2. Mostly computer fundamentals and DSA questions were asked.
Add your answer

Q1. SDLC process and how it is implemented in project
Add your answer
Q2. About projects, it's Objective, the role I have worked, output
Add your answer
Q3. Data structure, DBMS concepts
Add your answer

Q1. Tell us about your experience.
Add your answer
Q2. In english, give me a feedback you received lately.
Add your answer

Q1. Brief explanation of SOLID principles
Add your answer
Q2. Ref vs out arguments
Add your answer

Q1. Question are about interview
Add your answer
Q2. Answers about interview
Add your answer

The aptitude round consists of quantitative, technical questions mainly from java ,oops, ds concepts , some from os . Negative marking was there with 0.25 mark deduction.

It consists of three coding questions and that was pretty much easy . 1st qn is easy and so is the 2nd question . Third question is kind of medium level (but not so tough ) . It was a question related to doubly linked list . 1st and 2nd were array and string questions. We had this in pen and paper format , not in ids .

Q1. This is a technical hr one on one interview. It only depends based on your resume and in depth technical questions related to that. Hr would be well versed in those fields. There would be 3-4 Hrs and any o...read more
Add your answer

Q1. It is a in depth technical hr round . There will be panel of 4 technical hr . They will ask questions based on your resume and according to their knowledge in that field. Each will have a storng knowledge ...read more
Add your answer

Q1. Explain React life cycle
Ans. 
React life cycle refers to the series of methods that are invoked in the process of creating, updating, and destroying components.
• Mounting phase: constructor, render, componentDidMount

• Updating phase: render, componentDidUpdate

• Unmounting phase: componentWillUnmount
Answered by AI
Add your answer
Q2. Design a online calculator app
Ans. 
An online calculator app that allows users to perform basic arithmetic operations.
• Include buttons for numbers 0-9 and operators like +, -, *, /

• Implement functionality for clearing input, calculating result, and displaying history

• Consider adding advanced features like memory functions or scientific calculator mode
Answered by AI
Add your answer