cloudEQ Interview Questions and Answers

Q1. What is differnece between load balancer and autoscaling group, what is iam role and iam user
Ans. 
Load balancer distributes incoming network traffic across multiple servers, while autoscaling group automatically adjusts the number of instances based on traffic.
• Load balancer distributes traffic evenly across multiple servers to improve performance and reliability

• Autoscaling group automatically adjusts the number of instances based on traffic demand

• IAM role defines a set of permissions for AWS resources, while IAM us...read more
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Q2. What is the difference betwean iam role and iam user
Ans. 
IAM role is used to grant permissions to AWS services, while IAM user is used to grant permissions to individuals.
• IAM role is used to delegate access to AWS services, such as EC2 instances or Lambda functions

• IAM user is used to grant permissions to individuals who need to interact with AWS resources

• IAM roles do not have long-term credentials like IAM users, instead they are assumed by trusted entities

• IAM users have the...read more
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Q3. What is aws config
Ans. 
AWS Config is a service that provides a detailed inventory of AWS resources and configuration settings.
• AWS Config continuously monitors and records configurations of AWS resources.

• It helps assess, audit, and evaluate the configurations for compliance.

• AWS Config can be used to track changes to resources over time.

• It provides a history of resource configuration changes for troubleshooting and security analysis.
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Q4. What is tf state file
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Tf state file is a JSON file that stores the current state of your infrastructure managed by Terraform.
• Contains information about resources, their attributes, and dependencies

• Used by Terraform to keep track of the infrastructure state

• Should be stored securely and not shared publicly
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Q5. Explain the concept of manifest files in k8
Ans. 
Manifest files in k8 are configuration files used to define the desired state of resources in a Kubernetes cluster.
• Manifest files are written in YAML or JSON format.

• They define the resources like pods, services, deployments, etc., that should be created in the cluster.

• Manifest files can be applied using kubectl apply command.

• They help in maintaining the desired state of the cluster and managing configurations.

• Example: ...read more
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Q1. What technologies have you worked with?
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Q2. What is the significance of using user interfaces in conjunction with abstract classes?
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Q1. What is Amazon Web Services (AWS) Cloud?
Ans. 
AWS Cloud is a comprehensive cloud computing platform offering a wide range of services for computing, storage, and networking.
• Scalable Infrastructure: AWS allows businesses to scale resources up or down based on demand, such as using EC2 instances for computing power.

• Storage Solutions: Services like S3 provide scalable object storage for data backup and archiving.

• Database Services: AWS offers managed database services...read more
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Q2. What are the various services offered by Amazon Web Services (AWS)?
Ans. 
AWS offers a wide range of cloud services including computing, storage, databases, machine learning, and more.
• Compute Services: EC2 (Elastic Compute Cloud) for scalable virtual servers.

• Storage Services: S3 (Simple Storage Service) for object storage and EBS (Elastic Block Store) for block storage.

• Database Services: RDS (Relational Database Service) for managed databases like MySQL, PostgreSQL, and DynamoDB for NoSQL.

• Ne...read more
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Q1. Machine Coding Round: Develop Accordion
Ans. 
An accordion is a UI component that expands and collapses to show or hide content sections.
• Use HTML for structure: <div class='accordion'>...</div>

• Style with CSS for visual appeal: .accordion { border: 1px solid #ccc; }

• Implement JavaScript for functionality: addEventListener to toggle classes.

• Example of toggling: element.classList.toggle('active');

• Consider accessibility: use ARIA attributes for better scree...read more
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Q2. Evaluation the MC round and some random questtion
Ans. 
Evaluate the multiple-choice round by assessing clarity, relevance, and difficulty, followed by targeted follow-up questions.
• Assess clarity: Ensure questions are clearly worded to avoid confusion.

• Check relevance: Questions should align with the skills required for the role.

• Evaluate difficulty: Balance between easy and challenging questions to gauge candidate's knowledge.

• Example follow-up: 'Can you explain your thought ...read more
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Creating API Documentation

Q1. Tell me about yousrself
Ans. 
I am a highly experienced Senior Software Engineer with a strong background in developing scalable and efficient software solutions.
• Over 10 years of experience in software development

• Expertise in multiple programming languages such as Java, C++, and Python

• Proficient in designing and implementing complex systems

• Strong problem-solving and analytical skills

• Proven track record of delivering high-quality software on time an...read more
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Q2. What is current project and what is tech stack used in it?
Ans. 
I am currently working on a web application for a retail company using React, Node.js, and MongoDB.
• Developing a responsive UI using React and Redux

• Implementing server-side logic using Node.js and Express

• Storing and retrieving data using MongoDB

• Integrating third-party APIs for payment processing and shipping

• Writing automated tests using Jest and Enzyme
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Q3. Is Authentication implemented in project and if yes How?
Ans. 
Yes, authentication is implemented using OAuth 2.0 protocol.
• OAuth 2.0 protocol is used for authentication.

• Access tokens are issued to authorized clients.

• Refresh tokens are used to obtain new access tokens.

• Authentication is required for all API endpoints.
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Q4. What is Dependency Injection and Is is implemented in project and How?
Ans. 
Dependency Injection is a design pattern used to remove hard-coded dependencies and make code more flexible and testable.
• Dependency Injection is implemented by injecting the required dependencies into a class rather than creating them within the class.

• This can be achieved through constructor injection, setter injection, or interface injection.

• For example, in Java, Spring Framework provides a powerful dependency injecti...read more
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Q5. What are Action Filters? Why these are used?
Ans. 
Action Filters are attributes that can be applied to controller actions to perform pre/post processing.
• Action Filters are used to modify the behavior of controller actions.

• They can be used to perform authentication, logging, caching, etc.

• Action Filters can be applied globally or to specific actions.

• Examples include [Authorize] for authentication and [OutputCache] for caching.

• Action Filters can also be created by the de...read more
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Q6. What is Interfaces? and Why these are used?
Ans. 
Interfaces are a way to define a contract between two objects, specifying the methods and properties that one object must implement.
• Interfaces allow for loose coupling between objects, making it easier to change the implementation of one object without affecting others.

• They promote code reusability by allowing multiple objects to implement the same interface.

• Interfaces can be used to create mock objects for testing pur...read more
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Q7. What is the difference in Interfaces and Abstract classes?
Ans. 
Interfaces define contracts for behavior while abstract classes provide partial implementation.
• Interfaces cannot have implementation while abstract classes can have partial implementation.

• A class can implement multiple interfaces but can inherit from only one abstract class.

• Interfaces are used for loose coupling while abstract classes are used for code reuse.

• Example: An interface 'Drawable' can define a method 'draw' w...read more
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Q8. What is shallow copy in C#?
Ans. 
Shallow copy creates a new object with same values as original, but references the same memory locations.
• Shallow copy only copies the top-level object, not the nested objects.

• Changes made to the original object will reflect in the copied object.

• Use MemberwiseClone() method to create shallow copy of an object.

• Example: int[] arr1 = {1, 2, 3}; int[] arr2 = arr1.Clone() as int[]; arr2[0] = 4; Console.WriteLine(arr1[0]); //...read more
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Q9. What are ref and out keywords? and What is the difference in them?
Ans. 
Ref and out are keywords used in C# to pass arguments by reference instead of value.
• Ref and out are used to pass arguments by reference instead of value

• Ref keyword is used to pass a reference of the variable to the method

• Out keyword is used to pass a reference of the variable to the method and requires the variable to be initialized before use

• Ref keyword can be used to modify the value of the variable passed as an argu...read more
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Q10. Difference in String and String Builder?
Ans. 
String is immutable while StringBuilder is mutable.
• String is a final class and its value cannot be changed once created.

• StringBuilder is a mutable class and its value can be changed without creating a new object.

• String concatenation creates a new String object each time, while StringBuilder is more efficient for concatenation.

• Use String for fixed values and StringBuilder for dynamic values.
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Q11. What is Self Join in SQL Server? Give example
Ans. 
Self Join is a way to join a table with itself using aliases.
• It is useful when we need to compare records within the same table.

• It requires the use of aliases to differentiate between the two instances of the same table.

• Example: SELECT a.name, b.name FROM employees a, employees b WHERE a.manager_id = b.employee_id;
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Q12. What are delegate and how they are used?
Ans. 
Delegates are a type-safe function pointer used to encapsulate a method.
• Delegates allow methods to be passed as parameters to other methods.

• They can be used to implement callbacks and event handlers.

• Delegates can be chained together to create a pipeline of method calls.

• They are commonly used in .NET framework for event handling and LINQ queries.
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Q13. What is Normalization in sql server?
Ans. 
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a table into smaller tables and defining relationships between them.

• There are different levels of normalization, with each level reducing redundancy and improving data integrity further.

• Normalization helps to prevent data inconsistencies and anomalies, and makes it easier to...read more
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Q14. Difference in Overriding and Overloading?
Ans. 
Overriding is when a subclass provides its own implementation of a method from the superclass, while overloading is when a class has multiple methods with the same name but different parameters.
• Overriding is used to provide a specific implementation of a method in a subclass that is already defined in the superclass.

• Overloading is used to define multiple methods with the same name but different parameters in a class.

• Ov...read more
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Q15. Difference in IEnumerable and IQueryable?
Ans. 
IEnumerable is in-memory collection while IQueryable is a queryable data source.
• IEnumerable is used for querying data from in-memory collections like List, Array, etc.

• IQueryable is used for querying data from a data source like a database.

• IEnumerable executes the query on the client-side while IQueryable executes the query on the server-side.

• IQueryable is more efficient when working with large datasets as it allows for...read more
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Q16. Diifference in Value Type and Refence Type? Is String is Value Type or Reference Type?
Ans. 
Value types hold the data directly, while reference types hold a reference to the data.
• Value types are stored on the stack, while reference types are stored on the heap.

• String is a reference type in .NET.

• Value types include int, float, and bool.

• Reference types include arrays, classes, and interfaces.
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