10+ Suroj Buildcon Interview Questions and Answers

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

• Abstract class can have constructors, fields, and methods, while interface cannot have any implementation.

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

• Abstract classes are used to define common characteristics of subclasses, while interfaces are used to define common behaviors of classes.

• Example: Abstract class 'Animal' with abstr...read more

MVC components include Model, View, and Controller which work together to separate concerns in a software application.

• Model: Represents the data and business logic of the application.

• View: Represents the user interface and displays data from the model to the user.

• Controller: Acts as an intermediary between the model and view, handling user input and updating the model accordingly.

• Example: In a web application, the model could be a database table, the view could be an HTML pag...read more

PUT is used to update or replace an existing resource, while POST is used to create a new resource.

• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request.

• POST is not idempotent, meaning multiple identical requests may result in different outcomes.

• PUT is used when the client knows the exact URI of the resource it wants to update.

• POST is used when the server assigns a URI for the newly created resource.

• Example: PUT /users/123 update...read more

Jenkins supports various credential types for secure authentication and authorization.

• Username and password

• SSH key

• Secret text

• Certificate

• AWS credentials

HashSet is a collection of unique elements, while HashMap is a key-value pair collection.

• HashSet does not allow duplicate elements, while HashMap allows duplicate values but not duplicate keys.

• HashSet uses a hash table to store elements, while HashMap uses key-value pairs to store data.

• Example: HashSet<String> set = new HashSet<>(); HashMap<String, Integer> map = new HashMap<>();

ArrayList is non-synchronized and Vector is synchronized in Java.

• ArrayList is not synchronized, while Vector is synchronized.

• ArrayList is faster than Vector as it is not synchronized.

• Vector is thread-safe, while ArrayList is not.

• Example: ArrayList<String> list = new ArrayList<>(); Vector<String> vector = new Vector<>();

An interface in Object-Oriented Programming defines a contract for classes to implement certain methods or behaviors.

• An interface contains method signatures but no implementation details.

• Classes can implement multiple interfaces in Java.

• Interfaces allow for polymorphism and loose coupling in OOP.

• Example: 'Comparable' interface in Java defines a method 'compareTo' for comparing objects.

ConcurrentHashMap is a thread-safe implementation of the Map interface in Java.

• ConcurrentHashMap allows multiple threads to read and write to the map concurrently without the need for external synchronization.

• It achieves this by dividing the map into segments, each with its own lock, allowing multiple threads to access different segments concurrently.

• ConcurrentHashMap does not block the entire map when performing read or write operations, improving performance in multi-thread...read more

Independent microservices communicate through APIs, message queues, or event-driven architecture.

• Microservices communicate through RESTful APIs, allowing them to send and receive data over HTTP.

• Message queues like RabbitMQ or Kafka enable asynchronous communication between microservices.

• Event-driven architecture using tools like Apache Kafka allows microservices to react to events in real-time.

• Service mesh frameworks like Istio can also facilitate communication between micros...read more

Jenkins Multibranch Pipeline allows you to automatically create Jenkins Pipeline jobs for each branch in your repository.

• Automatically creates Jenkins Pipeline jobs for each branch in a repository

• Uses a Jenkinsfile to define the pipeline steps and configurations

• Supports automatic branch indexing and job creation

• Helps in managing multiple branches and their respective pipelines efficiently

Routing in MVC is carried out by mapping URLs to controller actions.

• Routing is configured in the RouteConfig.cs file in the App_Start folder.

• Routes are defined using the MapRoute method, which takes parameters like URL pattern, default values, and constraints.

• Routes are matched in the order they are defined, with the first match being used to determine the controller and action.

• Route parameters can be accessed in controller actions using the RouteData object.

• Example: routes.M...read more

Types of Jenkins pipelines include Scripted Pipeline, Declarative Pipeline, and Multibranch Pipeline.

• Scripted Pipeline allows for maximum flexibility and control through Groovy scripting

• Declarative Pipeline provides a more structured and simplified syntax for defining pipelines

• Multibranch Pipeline automatically creates a new pipeline for each branch in a repository

Jenkins is an open-source automation server used for continuous integration and continuous delivery of software projects.

• Jenkins allows for automation of building, testing, and deploying software.

• It integrates with various version control systems like Git and SVN.

• Jenkins pipelines allow for defining complex build and deployment workflows.

• Plugins in Jenkins extend its functionality to support various tools and technologies.

• Jenkins provides a web-based interface for easy config...read more