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Question-1. What is Elixir?
Answer-1: Elixir is a functional, concurrent programming language built on the Erlang VM (BEAM).
Question-2. Who created Elixir?
Answer-2: Elixir was created by Jos? Valim in 2011.
Question-3. What are the key features of Elixir?
Answer-3: Elixir offers scalability, fault tolerance, and metaprogramming capabilities.
Question-4. What is the BEAM in Elixir?
Answer-4: BEAM is the Erlang Virtual Machine that executes Elixir code.
Question-5. How does Elixir handle concurrency?
Answer-5: Concurrency in Elixir is achieved using lightweight processes and message passing.
Question-6. What is the Phoenix framework?
Answer-6: Phoenix is a web development framework built with Elixir for building scalable web applications.
Question-7. What are processes in Elixir?
Answer-7: Processes in Elixir are lightweight and independent units of computation.
Question-8. How does Elixir achieve fault tolerance?
Answer-8: Fault tolerance is achieved using process isolation, supervisors, and the OTP framework.
Question-9. What is a tuple in Elixir?
Answer-9: A tuple is a fixed-size collection of values enclosed in curly brackets, e.g., {1, 2, 3}.
Question-10. How are lists represented in Elixir?
Answer-10: Lists are sequences of elements enclosed in square brackets, e.g., [1, 2, 3].
Question-11. What is pattern matching in Elixir?
Answer-11: Pattern matching allows for the destructuring and matching of data structures.
Question-12. What is the difference between List and Tuple in Elixir?
Answer-12: Lists are linked data structures optimized for sequential access; tuples are fixed-size collections.
Question-13. What is iex in Elixir?
Answer-13: iex is the interactive Elixir shell for running and testing Elixir code.
Question-14. What is the purpose of the mix tool in Elixir?
Answer-14: mix is a build tool for creating, compiling, and managing Elixir projects.
Question-15. What is an atom in Elixir?
Answer-15: An atom is a constant whose name is its value, e.g., :ok.
Question-16. How are strings represented in Elixir?
Answer-16: Strings are UTF-8 encoded binaries, enclosed in double quotes, e.g., "hello".
Question-17. What are guards in Elixir?
Answer-17: Guards are additional conditions used to refine pattern matching logic.
Question-18. What is a map in Elixir?
Answer-18: A map is a key-value data structure, defined using %{key => value} syntax.
Question-19. What are structs in Elixir?
Answer-19: Structs are maps with a fixed set of fields and a specific module-defined structure.
Question-20. What is a module in Elixir?
Answer-20: A module is a collection of functions, defined with defmodule.
Question-21. What are protocols in Elixir?
Answer-21: Protocols define a shared behavior for different data types.
Question-22. What is a macro in Elixir?
Answer-22: A macro is a construct that generates code at compile time for metaprogramming.
Question-23. What is Enum in Elixir?
Answer-23: Enum is a module with functions for working with enumerables, such as lists and maps.
Question-24. What is the difference between Enum and Stream in Elixir?
Answer-24: Enum operates on collections eagerly, while Stream works lazily for large data.
Question-25. How do you define an anonymous function in Elixir?
Answer-25: Anonymous functions are defined using the fn keyword, e.g., fn x -> x * 2 end.
Question-26. What is the pipe operator (`
Answer-26: >`) in Elixir?
Question-27. How does Elixir handle immutability?
Answer-27: Data structures in Elixir are immutable, meaning they cannot be changed after creation.
Question-28. What is a GenServer in Elixir?
Answer-28: A GenServer is a generic server abstraction for implementing OTP-compliant processes.
Question-29. What is the purpose of Supervisor in Elixir?
Answer-29: Supervisors monitor and restart child processes in case of failure.
Question-30. How is recursion used in Elixir?
Answer-30: Recursion is used for iteration since Elixir does not have traditional loops.
Question-31. What is the difference between throw and raise in Elixir?
Answer-31: throw is used for non-fatal exceptions; raise is used for errors that terminate execution.
Question-32. What are tasks in Elixir?
Answer-32: Tasks provide a way to run asynchronous computations using Task module.
Question-33. How does Elixir achieve scalability?
Answer-33: Scalability is achieved using lightweight processes, OTP, and distributed programming.
Question-34. What are agents in Elixir?
Answer-34: Agents are abstractions for managing state in a separate process.
Question-35. What is the role of spawn in Elixir?
Answer-35: spawn creates a new lightweight process to execute a function concurrently.
Question-36. What is ETS in Elixir?
Answer-36: ETS (Erlang Term Storage) is an in-memory storage system for large data sets.
Question-37. What are comprehensions in Elixir?
Answer-37: Comprehensions provide concise syntax for generating collections using filters and transformations.
Question-38. What is the role of Logger in Elixir?
Answer-38: Logger provides functionality for logging messages in applications.
Question-39. How do you implement error handling in Elixir?
Answer-39: Use try, rescue, catch, and after for error handling and resource cleanup.
Question-40. What are the differences between Elixir and Erlang?
Answer-40: Elixir has modern syntax, metaprogramming, and mix, while Erlang focuses on stability.
Question-41. How do you start an Elixir application?
Answer-41: Applications are started using mix run or iex -S mix.
Question-42. What is the role of Module attributes in Elixir?
Answer-42: Module attributes store metadata and configuration, e.g., @moduledoc.
Question-43. What is the Process module in Elixir?
Answer-43: Process module provides functions for interacting with processes, like send and receive.
Question-44. How do you test Elixir code?
Answer-44: Testing is done using the built-in ExUnit framework.
Question-45. What is GenStage in Elixir?
Answer-45: GenStage is a library for building concurrent, data-driven workflows.
Question-46. How are dependencies managed in Elixir projects?
Answer-46: Dependencies are managed using mix and the mix.exs configuration file.
Question-47. What is flow in Elixir?
Answer-47: Flow is a library for parallel data processing on top of GenStage.
Question-48. What is the purpose of the Registry module?
Answer-48: Registry allows for registering and looking up processes by name.
Question-49. How does Elixir support distributed systems?
Answer-49: Elixir supports distributed systems through node communication and OTP libraries.
Question-50. What is Dialyzer in Elixir?
Answer-50: Dialyzer is a static analysis tool for finding type errors and code discrepancies.
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