10+ Nelito System Interview Questions and Answers

OOPs concepts are the principles of Object-Oriented Programming. Class is a blueprint for creating objects. Interface is a contract.

• OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction.

• Class is a template for creating objects that defines its properties and methods.

• Interface is a contract that defines a set of methods that a class must implement.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objec...read more

To backup data from a corrupted OS, connect the hard drive to another computer and use backup software or manually copy the files.

• Remove the hard drive from the affected computer

• Connect the hard drive to another computer using an external enclosure or adapter

• Use backup software to create a backup of the data on the C drive

• Alternatively, manually copy the important files and folders from the C drive to another storage device

To troubleshoot client side and server side errors, identify the source of the error, check logs, test connectivity, and consult documentation.

• Identify the source of the error - determine if it is a client side or server side issue

• Check logs for error messages and stack traces to pinpoint the issue

• Test connectivity between client and server to ensure communication is working properly

• Consult documentation or resources for common errors and troubleshooting steps

• Use debugging to...read more

OOPs is a programming paradigm based on the concept of objects. String is immutable in Java.

• OOPs is based on the concept of objects, which have properties and methods.

• Encapsulation, inheritance, and polymorphism are the three main pillars of OOPs.

• String is immutable in Java, meaning that once a string object is created, it cannot be modified.

Windows Firewall is a network security system that monitors and controls incoming and outgoing network traffic. Windows Defender is an antivirus software that protects against malware and other threats.

• Windows Firewall controls network traffic while Windows Defender protects against malware

• Windows Firewall is a network security system while Windows Defender is an antivirus software

• Windows Firewall is built-in to Windows while Windows Defender needs to be installed separately

• W...read more

An exception is an event that occurs during the execution of a program that disrupts the normal flow of instructions.

• Exceptions are used to handle errors and other exceptional events that occur during the execution of a program.

• In Java, exceptions are objects that are thrown by a method when an error or exceptional condition occurs.

• The try-catch block is used to handle exceptions in Java.

• Example: try { int x = 5/0; } catch (ArithmeticException e) { System.out.println("Error: ...read more

The code represents the entry point of a Java program.

• The 'public' keyword indicates that the method is accessible by any other class.

• The 'static' keyword allows the method to be called without creating an instance of the class.

• The 'void' keyword indicates that the method does not return any value.

• The 'main' method is where the program starts execution.

• The 'String[] args' parameter allows command-line arguments to be passed to the program.

Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured settings and tools.

• Spring Boot eliminates the need for manual configuration by providing defaults for most settings.

• It allows for easy creation of standalone, production-grade Spring-based Applications.

• Spring Boot uses embedded servers like Tomcat, Jetty, or Undertow to simplify deployment.

• It provides a wide range of plugins to support various functionalities like secur...read more

I have extensive experience in Spring Boot and am able to work 5 days a week in the office.

• Extensive experience in developing applications using Spring Boot framework

• Proficient in creating RESTful web services and microservices

• Familiar with Spring Boot features like auto-configuration, embedded servers, and Spring Boot Actuator

• Comfortable working in a team environment and collaborating with other developers

• Yes, I can work 5 days a week in the office

API testing involves testing the various HTTP methods like GET, POST, PUT, DELETE, etc.

• API testing ensures that the API functions correctly and meets the requirements

• Common HTTP methods used in API testing include GET, POST, PUT, DELETE

• Each HTTP method has a specific purpose in API testing, such as retrieving data with GET or updating data with PUT

• API testing tools like Postman or SoapUI can be used to test HTTP methods

Tier 2 and Tier 3 data centers are classifications based on their infrastructure and redundancy levels.

• Tier 2 data centers have redundant components but lack redundancy in power and cooling distribution, while Tier 3 data centers have multiple power and cooling distribution paths.

• Tier 2 data centers may have an uptime of 99.741%, while Tier 3 data centers have an uptime of 99.982%.

• Tier 2 data centers are more cost-effective but less reliable compared to Tier 3 data centers.

• Ti...read more

The question is asking for a code to format dates.

• Use libraries like moment.js or date-fns for easy date formatting in JavaScript.

• For example, to format a date in MM/DD/YYYY format using moment.js: moment(date).format('MM/DD/YYYY')

• Make sure to handle different date formats and timezones appropriately.

Spring annotations are used to provide metadata to Spring framework classes and components.

• Annotations are used to configure Spring beans, dependency injection, AOP, and more

• Examples include @Component, @Autowired, @RequestMapping, @Service, @Repository

• Annotations help in reducing XML configuration and make code more readable and maintainable