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Question-1. What is the Io programming language?
Answer-1: Io is a dynamically typed, prototype-based programming language inspired by Smalltalk, Self, and Lisp.
Question-2. Who created the Io language?
Answer-2: Io was created by Steve Dekorte.
Question-3. What type of programming paradigm does Io follow?
Answer-3: Io is prototype-based, object-oriented, and reflective.
Question-4. How do you define a variable in Io?
Answer-4: Variables are defined using :=, e.g., x := 10.
Question-5. How do you create a function in Io?
Answer-5: A function (method) is created using the method keyword, e.g., square := method(x, x * x).
Question-6. How do you call a function in Io?
Answer-6: Functions are called by sending messages, e.g., square(4).
Question-7. What is prototype-based programming?
Answer-7: Prototype-based programming uses cloning instead of classes to create objects.
Question-8. How do you create a new object in Io?
Answer-8: Objects are created by cloning existing objects, e.g., newObj := Object clone.
Question-9. What is message passing in Io?
Answer-9: Io treats everything as a message sent to objects, similar to Smalltalk.
Question-10. How do you print output in Io?
Answer-10: Using write, e.g., write("Hello, Io!").
Question-11. How do you perform string concatenation in Io?
Answer-11: Using .., e.g., "Hello, " .. "Io".
Question-12. How do you create an array in Io?
Answer-12: Arrays are created using List, e.g., nums := list(1, 2, 3).
Question-13. How do you access elements in an Io list?
Answer-13: Using at(), e.g., nums at(0).
Question-14. How do you add an element to a list in Io?
Answer-14: Using append(), e.g., nums append(4).
Question-15. What is an Io coroutine?
Answer-15: A coroutine is a lightweight thread allowing concurrency.
Question-16. How do you create a coroutine in Io?
Answer-16: Using Coroutine, e.g., co := Coroutine clone.
Question-17. How do you handle loops in Io?
Answer-17: Using for, while, or foreach, e.g., for(i, 1, 5, write(i)).
Question-18. How do you check conditions in Io?
Answer-18: Using if, e.g., if(x > 10, write("Big")).
Question-19. How do you define an object method in Io?
Answer-19: Using := method(), e.g., Person greet := method(write("Hi!")).
Question-20. How do you clone an object in Io?
Answer-20: Using clone, e.g., newObj := oldObj clone.
Question-21. How do you check the type of an object in Io?
Answer-21: Using type, e.g., "hello" type.
Question-22. What is the difference between Object and Proto in Io?
Answer-22: Object is the base object, while Proto is a system-level prototype.
Question-23. How do you define a slot in Io?
Answer-23: Slots are defined using :=, e.g., obj name := "Io".
Question-24. How do you remove a slot in Io?
Answer-24: Using removeSlot(), e.g., obj removeSlot("name").
Question-25. How do you import external files in Io?
Answer-25: Using doFile, e.g., doFile("script.io").
Question-26. How does Io handle garbage collection?
Answer-26: Io uses automatic garbage collection.
Question-27. How do you create an infinite loop in Io?
Answer-27: Using loop, e.g., loop(write("Io")).
Question-28. What is tail recursion in Io?
Answer-28: A function where the recursive call is the last operation.
Question-29. How do you exit a program in Io?
Answer-29: Using System exit().
Question-30. How do you get user input in Io?
Answer-30: Using File standardInput readLine.
Question-31. How do you comment in Io?
Answer-31: Using #, e.g., # This is a comment.
Question-32. How do you perform file I/O in Io?
Answer-32: Using File methods, e.g., file := File open("test.txt").
Question-33. What is reflection in Io?
Answer-33: The ability to modify and inspect objects at runtime.
Question-34. How do you check if a slot exists in an object?
Answer-34: Using hasSlot(), e.g., obj hasSlot("name").
Question-35. What is a metaprogramming feature in Io?
Answer-35: Modifying code structures at runtime.
Question-36. How do you raise an exception in Io?
Answer-36: Using Exception raise().
Question-37. How do you catch an exception in Io?
Answer-37: Using try, e.g., try(Exception raise("Error")).
Question-38. How do you define a module in Io?
Answer-38: Modules are created using objects and methods.
Question-39. What is the Lobby in Io?
Answer-39: Lobby is the global environment where all objects reside.
Question-40. How do you convert a string to a number in Io?
Answer-40: Using asNumber, e.g., "123" asNumber.
Question-41. What is method chaining in Io?
Answer-41: Calling multiple methods on an object sequentially.
Question-42. How do you delay execution in Io?
Answer-42: Using System sleep, e.g., System sleep(2).
Question-43. How do you create a dictionary in Io?
Answer-43: Using Map, e.g., dict := Map clone.
Question-44. How do you iterate over a dictionary in Io?
Answer-44: Using foreach, e.g., dict foreach(k, v, write(k, ": ", v)).
Question-45. What are prototypes in Io?
Answer-45: Objects from which other objects inherit behavior.
Question-46. How do you inspect an object?s slots in Io?
Answer-46: Using slotNames, e.g., obj slotNames.
Question-47. How do you remove an object from memory in Io?
Answer-47: Io handles memory automatically, but removeSlot() can help.
Question-48. How do you define a dynamic method in Io?
Answer-48: Assigning a method at runtime, e.g., obj sayHi := method(write("Hi!")).
Question-49. How does Io compare with JavaScript?
Answer-49: Both are prototype-based, but Io has a simpler syntax and message-passing model.
Question-50. What is the future of Io?
Answer-50: Io is niche but valued for metaprogramming and simplicity.
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