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Question 1. Which phase of the Software Development Life Cycle (SDLC) involves gathering requirements and understanding user needs? A) Deployment B) Requirements analysis C) Maintenance D) Testing Answer: B Explanation: Requirements analysis is the SDLC phase where developers gather and understand user needs and project requirements, forming the foundation for subsequent phases. Question 2. In the context of software development methodologies, which is most closely associated with iterative development and flexible planning? A) Waterfall B) Agile C) V-Model D) Spiral Answer: B Explanation: Agile methodology emphasizes iterative development, flexibility,
and close collaboration with stakeholders, contrasting with the sequential nature of Waterfall. Question 3. Which programming concept encapsulates data and functions within a single unit to restrict direct access to some of an object's components? A) Inheritance B) Encapsulation C) Polymorphism D) Abstraction Answer: B Explanation: Encapsulation involves bundling data and methods within objects and restricting access to internal details, enhancing modularity and security. Question 4. Which control structure is used to execute a block of code repeatedly based on a condition? A) Conditional statement B) Loop C) Switch case
C) Recursion D) Data encapsulation Answer: B Explanation: Higher-order functions are functions that accept other functions as parameters or return them, enabling functional composition. Question 7. Which programming language is primarily known for its use in web development and has a syntax similar to JavaScript? A) Python B) Ruby C) PHP D) Swift Answer: C Explanation: PHP is a server-side scripting language with syntax designed for web development, often embedded in HTML. Question 8. Which front-end framework is based on a component-based architecture and is maintained by Facebook? A) Angular B) React
C) Vue.js D) Svelte Answer: B Explanation: React, maintained by Facebook, uses a component-based architecture for building user interfaces efficiently. Question 9. Which back-end framework is built on Python and promotes rapid development with an emphasis on simplicity? A) Laravel B) Spring Boot C) Django D) Ruby on Rails Answer: C Explanation: Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. Question 10. Which full-stack stack includes MongoDB, Express.js, Angular, and Node.js? A) MEAN B) MERN
C) Flutter D) Ionic Answer: C Explanation: Flutter, developed by Google, uses Dart language and compiles to native code for multiple platforms. Question 13. In system design, which pattern ensures only one instance of a class exists and provides a global point of access? A) Factory B) Singleton C) Observer D) MVC Answer: B Explanation: The Singleton pattern restricts instantiation to a single object and provides a global access point, useful for managing shared resources. Question 14. Which architecture style breaks applications into small, independent services communicating via APIs? A) Monolithic B) Microservices
C) Layered D) Client-Server Answer: B Explanation: Microservices architecture decomposes applications into smaller, independent services that communicate over APIs, enhancing scalability and maintainability. Question 15. Which type of database is optimized for storing and retrieving large volumes of unstructured or semi-structured data? A) Relational database B) NoSQL database C) Data warehouse D) Flat file Answer: B Explanation: NoSQL databases like MongoDB and Cassandra are designed for unstructured or semi-structured data, offering flexibility and scalability. Question 16. Which principle states that software should be designed to be simple and easy to understand? A) KISS
B) git commit C) git branch D) git merge Answer: C Explanation: The command 'git branch' creates a new branch, allowing parallel development without affecting the main codebase. Question 19. Which best practice in version control involves writing clear, descriptive commit messages? A) Rebase frequently B) Commit often with vague messages C) Use detailed and meaningful commit messages D) Avoid committing until all features are complete Answer: C Explanation: Clear, descriptive commit messages facilitate tracking changes, understanding history, and collaboration. Question 20. Which build automation tool is primarily used for Java projects to manage dependencies and build processes? A) npm
B) Maven C) Webpack D) Gradle Answer: B Explanation: Maven is a popular build automation and dependency management tool for Java projects. Question 21. Which continuous integration tool is open-source and widely used for automating builds and testing? A) Jenkins B) CircleCI C) Travis CI D) Bamboo Answer: A Explanation: Jenkins is an open-source automation server that supports building, testing, and deploying software projects. Question 22. Which testing type verifies individual units or components of code in isolation? A) Integration testing
B) Test-Driven Development (TDD) C) Manual testing D) Regression testing Answer: B Explanation: TDD emphasizes writing tests first, then developing code to pass those tests, encouraging better design and test coverage. Question 25. Which static analysis tool is used for JavaScript code quality checking? A) SonarQube B) ESLint C) Checkstyle D) Pylint Answer: B Explanation: ESLint is a static code analysis tool that identifies problematic patterns and enforces coding standards in JavaScript. Question 26. Which security vulnerability involves injecting malicious SQL statements into input fields? A) XSS
B) CSRF
C) Buffer overflow D) SQL injection Answer: D Explanation: SQL injection occurs when malicious SQL code is inserted into input fields, potentially compromising database security. Question 27. Which security mechanism involves granting tokens that clients present to authenticate requests? A) Password hashing B) OAuth C) SSL/TLS D) Firewall Answer: B Explanation: OAuth is a standard for token-based authentication, allowing secure delegated access to resources. Question 28. Which tool is commonly used for penetration testing to identify security vulnerabilities? A) Jenkins
B) Trello C) Asana D) Microsoft Project Answer: B Explanation: Trello uses boards and cards for visual task management, ideal for Agile teams. Question 31. Which cloud service model provides virtualized hardware resources over the internet? A) IaaS B) PaaS C) SaaS D) FaaS Answer: A Explanation: Infrastructure as a Service (IaaS) offers virtualized hardware resources, such as servers and storage, over the cloud. Question 32. Which tool is used for managing infrastructure as code in cloud environments? A) Docker
B) Terraform C) Jenkins D) Nagios Answer: B Explanation: Terraform is an open-source tool for defining and provisioning infrastructure as code across various cloud providers. Question 33. Which practice involves integrating and deploying code changes frequently to reduce integration problems? A) Continuous deployment B) Continuous integration C) Continuous delivery D) DevOps automation Answer: B Explanation: Continuous integration involves frequently merging code changes into a shared repository, with automated builds and tests. Question 34. Which containerization platform is commonly used to create, deploy, and manage containers? A) Kubernetes
B) Latency C) Response time D) Error rate Answer: C Explanation: Response time measures the duration from sending a request to receiving a response, indicating system responsiveness. Question 37. Which tool provides real-time monitoring of application performance in production? A) SonarQube B) New Relic C) Jenkins D) GitLab Answer: B Explanation: New Relic offers real-time monitoring of application performance, including response times and error rates. Question 38. Which algorithmic complexity notation describes an algorithm whose running time increases linearly with input size? A) O(1)
B) O(log n) C) O(n) D) O(n^2) Answer: C Explanation: O(n) indicates linear growth, meaning execution time scales proportionally with input size. Question 39. Which database optimization technique involves creating indexes on columns frequently used in WHERE clauses? A) Normalization B) Indexing C) Denormalization D) Partitioning Answer: B Explanation: Indexing improves query performance by allowing faster data retrieval on specific columns. Question 40. Which tool is used to monitor and visualize system metrics and logs in a centralized dashboard? A) Prometheus
