National Career Service Interview Questions and Answers

Q1. Java 8 What is Lamda Expression What is DI in spring
Ans. 
Lambda expression is a concise way to represent an anonymous function in Java 8. DI (Dependency Injection) is a design pattern used in Spring to manage object dependencies.
• Lambda expressions are used to implement functional interfaces with a single abstract method.

• DI in Spring allows for loose coupling between objects by injecting dependencies at runtime.

• Example of Lambda expression: (x, y) -> x + y

• Example of DI in Spr...read more
Answered by AI
Add your answer
Q2. What is Functional Interface
Ans. 
Functional Interface is an interface with only one abstract method.
• Functional Interface is used in Lambda expressions.

• It can have any number of default or static methods.

• Examples include Runnable, Comparator, and Callable interfaces.

• Functional Interface can be annotated with @FunctionalInterface annotation.
Answered by AI
Add your answer
Q3. What is oops concept
Ans. 
OOPs is a programming paradigm based on the concept of objects, which can contain data and code.
• OOPs stands for Object-Oriented Programming

• It focuses on creating objects that interact with each other to solve a problem

• It includes concepts like inheritance, polymorphism, encapsulation, and abstraction

• Examples of OOPs languages are Java, C++, Python, and Ruby
Answered by AI
Add your answer

The 90-minute test includes basic aptitude, verbal ability, followed by two data structure and algorithm questions.

Q1. What are the pillars of Object-Oriented Programming (OOP)?
Ans. 
OOP is based on four main pillars: Encapsulation, Abstraction, Inheritance, and Polymorphism, enhancing code modularity and reusability.
• Encapsulation: Bundling data and methods in a class. Example: A class 'Car' with properties like 'speed' and methods like 'accelerate()'.

• Abstraction: Hiding complex implementation details. Example: A 'Payment' interface that defines methods like 'processPayment()' without revealing the...read more
Answered by AI
Add your answer
Q2. What questions were asked regarding the OSI model in the context of computer networking?
Add your answer

Q1. What are the steps to deploy an application to kubernetes?
Ans. 
Steps to deploy an application to Kubernetes
• Create a Kubernetes deployment file with specifications for the application

• Apply the deployment file using kubectl apply command

• Monitor the deployment using kubectl get pods command

• Expose the application using a Kubernetes service

• Scale the application by adjusting the replica count in the deployment file
Answered by AI
Add your answer
Q2. What are modules in terraform?
Ans. 
Modules in Terraform are reusable configurations that can be used to create multiple instances of resources.
• Modules help in organizing and reusing Terraform configurations.

• They allow for creating reusable components that can be shared across different projects.

• Modules can be used to encapsulate related resources and configurations.

• They promote code reusability and maintainability in Terraform scripts.
Answered by AI
Add your answer
Q3. Define stage in docker.
Ans. 
A stage in Docker is a logical division in a Dockerfile where a specific set of instructions are executed and the resulting image is saved.
• Stages help in breaking down complex build processes into smaller, manageable parts.

• Each stage can have its own base image and set of instructions.

• Stages can be used to optimize the build process by reusing intermediate images.

• Stages are defined using the 'FROM' keyword in a Dockerf...read more
Answered by AI
Add your answer
Q4. What is CrashLoopBackOff
Ans. 
CrashLoopBackOff is an error state in Kubernetes when a container repeatedly crashes and fails to start.
• CrashLoopBackOff occurs when a container in a Kubernetes pod crashes and Kubernetes tries to restart it, but it keeps failing.

• This error is often caused by misconfigurations, resource constraints, or application bugs.

• To troubleshoot CrashLoopBackOff, check the container logs, resource limits, and pod configuration.

• Ex...read more
Answered by AI
Add your answer
Q5. What is NullResource in terraform.
Ans. 
NullResource in Terraform is a resource that performs no actions when applied, but can be used to trigger provisioners or other side effects.
• NullResource is a resource type in Terraform that allows you to run provisioners without creating any infrastructure.

• It can be used to trigger actions like running scripts or commands on the local machine or remote servers.

• NullResource is often used for tasks like running initiali...read more
Answered by AI
Add your answer

Q1. K8s architecture
Add your answer
Q2. Modules in terrafrom
Ans. 
Modules in Terraform are reusable configurations that can be used to create resources in a consistent and efficient manner.
• Modules help in organizing and reusing Terraform configurations

• They can be used to create resources, manage infrastructure, and define policies

• Modules can be shared and reused across different projects

• Example: Creating a module for provisioning an AWS EC2 instance
Answered by AI
Add your answer