CorporateServe Solution Interview Questions, Process, and Tips

Q1. Difference between Lag & Lead with an example
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Q2. Example explaining Rank,Dense_Rank,Row_Number
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Q3. Business question around customer funneling.
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Q4. Some technical questions around marketing campaigns(utm_source,campaign_id,etc.)
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Q1. Questions around customer funneling(Ideal and non-ideal)
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Q2. Some other business related problems and situational questions.
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Q1. Behavioural and resume basaed questions with some situational questions.
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Q1. Behavioral questions.
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Q1. Angular A to Z Hooks,Services,Api Integration,component communication
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Q2. Html ,CSS basic
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Q1. Server and web api related questions
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Q1. Can you provide details about yourself and your educational background?
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Q2. About Winjit technologies
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Print a specific pattern using any programming language.

Q1. What is a class in Object-Oriented Programming (OOP)?
Ans. 
A class in OOP is a blueprint for creating objects, defining their properties and behaviors.
• Classes are templates for creating objects in OOP

• They define the properties (attributes) and behaviors (methods) of objects

• Objects are instances of classes, each with its own unique data

• Inheritance allows classes to inherit properties and behaviors from other classes

• Encapsulation ensures that the data is hidden and can only be a...read more
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Q2. What is the difference between an abstract class and an interface?
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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 contracts for...read more
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Q3. What is joining and creating an inner join query?
Ans. 
Joining is combining data from two or more tables based on a related column, while an inner join query retrieves only the matching records.
• Joining is used to combine data from multiple tables in a database.

• Inner join query retrieves only the records that have matching values in both tables.

• Syntax for inner join: SELECT columns FROM table1 INNER JOIN table2 ON table1.column = table2.column;

• Example: SELECT orders.order_i...read more
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Q1. Starts with a introduction, Core Java concepts, OOPS concepts, Singleton design pattern, Spring boot annotations like service, restcontroller.
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Q2. DSA logical questions like 2nd highest number. How to find missing number from an array.
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Q1. Tell me about yourself.
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring Boot, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring Boot, and Angular

• Strong problem-solving skills

• Experience working in Agile development environment

• Bachelor's degree in Computer Science from XYZ University
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Q2. Tell me about your family.
Ans. 
I come from a close-knit family of five, including my parents, older sister, and younger brother.
• Close-knit family of five

• Parents, older sister, and younger brother

• We enjoy spending time together traveling and trying new restaurants
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Q3. Why do you want to change the company
Ans. 
Seeking new challenges and opportunities for growth in a different environment.
• Desire for new challenges and learning opportunities

• Seeking a better work-life balance

• Interested in working with new technologies or industries

• Looking for a more collaborative team environment
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Q4. After that interviewer describes my work and position in the company.
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Q1. What is runtime polymorphism, and can you provide a code example to illustrate it?
Ans. 
Runtime polymorphism allows a subclass to provide a specific implementation of a method that is already provided by its parent class.
• Runtime polymorphism is achieved through method overriding, where a subclass provides its own implementation of a method that is already defined in its superclass.

• The method to be overridden must have the same name, return type, and parameters in both the superclass and subclass.

• When an o...read more
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Q2. Streams in java
Ans. 
Streams in Java provide a way to process collections of objects in a functional style.
• Streams are sequences of elements that support various operations like filter, map, reduce, etc.

• They can be created from collections, arrays, or generate elements dynamically.

• Streams can be sequential or parallel, allowing for efficient processing of large datasets.

• Example: List<String> names = Arrays.asList("Alice", "Bob", "Cha...read more
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Q3. How do we create threads in Java, and how do we invoke them?
Ans. 
Threads in Java are created by extending the Thread class or implementing the Runnable interface, and invoked using the start() method.
• Threads can be created by extending the Thread class and overriding the run() method.

• Threads can also be created by implementing the Runnable interface and passing an instance of the class to a Thread object.

• Threads are invoked by calling the start() method on the Thread object.
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Q4. What is a Rest Template and how is it used?
Ans. 
Rest Template is a class in Spring that simplifies making HTTP requests and handling responses.
• Rest Template is part of the Spring framework in Java.

• It can be used to make HTTP requests to RESTful web services.

• It simplifies the process of making HTTP calls and handling responses.

• Rest Template can handle GET, POST, PUT, DELETE, etc. requests.

• Example: RestTemplate restTemplate = new RestTemplate();
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Q1. What is CICD ?
Ans. 
CICD stands for Continuous Integration and Continuous Deployment. It is a software development practice where code changes are automatically built, tested, and deployed.
• Automates the process of integrating code changes into a shared repository

• Automatically builds and tests the code to ensure it is functional

• Automatically deploys the code to production or staging environments

• Helps in detecting and fixing integration err
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Q2. How to create image out of running container ?
Ans. 
To create an image out of a running container, you can use the 'docker commit' command.
• Use 'docker commit' command to create an image from a running container

• Syntax: docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

• Example: docker commit container_id repository_name:tag
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Q3. What is the difference between docker add and copy command?
Ans. 
Docker add command can fetch a file from a URL and add it to the image, while copy command copies files from the host machine to the image.
• Docker add command can fetch files from URLs and add them to the image

• Copy command copies files from the host machine to the image

• Add command can also automatically extract compressed files during the build process

• Copy command is more commonly used for copying local files
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Q4. What is freestyle project and pipeline ?
Ans. 
A freestyle project is a type of project in Jenkins that allows users to configure the build process in any way they want. A pipeline is a set of automated steps that define the process for building, testing, and deploying code.
• Freestyle project in Jenkins allows users to configure build process manually

• Pipeline in Jenkins is a set of automated steps for building, testing, and deploying code

• Freestyle projects are more ...read more
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Q5. What is the difference between docker swarm and docker compose ?
Ans. 
Docker Swarm is used for orchestrating multiple Docker containers across multiple hosts, while Docker Compose is used for defining and running multi-container Docker applications.
• Docker Swarm is a container orchestration tool that allows you to manage a cluster of Docker hosts.

• Docker Compose is a tool for defining and running multi-container Docker applications.

• Docker Swarm is used for scaling and managing a cluster of...read more
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Q1. What is the project you worked can you plz explain?
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Q2. What is VPC ?
Ans. 
VPC stands for Virtual Private Cloud, a virtual network dedicated to a single organization's resources in the cloud.
• Allows organizations to have control over their virtual network environment

• Enables customization of network configuration

• Provides security by allowing isolation of resources

• Can connect to on-premises data centers or other VPCs using VPN or Direct Connect
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Q3. What is CICD pipeline and its stages ?
Ans. 
CICD pipeline is a process that automates the building, testing, and deployment of software.
• Continuous Integration (CI) - code changes are integrated into a shared repository multiple times a day.

• Continuous Testing - automated tests are run to ensure code quality.

• Continuous Deployment - code changes are automatically deployed to production.

• Stages include: build, test, deploy, and monitor.

• Tools like Jenkins, GitLab, and
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Q4. VPC peering concept ?
Ans. 
VPC peering allows connecting two VPCs to communicate using private IP addresses.
• VPC peering enables instances in different VPCs to communicate as if they are within the same network.

• Traffic between peered VPCs stays within the private IP space and does not traverse the internet.

• VPC peering does not involve a gateway, VPN, or direct connection.

• Both VPCs must have non-overlapping IP ranges for successful peering.

• Example...read more
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Q5. Whole concept of VPC , subnet and route table and NAT gateway ?
Ans. 
VPC is a virtual private cloud that allows you to create isolated networks within the cloud environment. Subnets are subdivisions of a VPC, route tables define how traffic is directed within the VPC, and NAT gateway allows instances in a private subnet to access the internet.
• VPC is a virtual private cloud that provides a logically isolated section of the AWS Cloud where you can launch resources.

• Subnets are subdivisions...read more
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Q1. Basics Quesestions?
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