Frequently asked questions and answers of Rebol in Artificial Intelligence and Machine Learning of Computer Science to enhance your skills, knowledge on the selected topic. We have compiled the best Rebol Interview question and answer, trivia quiz, mcq questions, viva question, quizzes to prepare. Download Rebol FAQs in PDF form online for academic course, jobs preparations and for certification exams .
Intervew Quizz is an online portal with frequently asked interview, viva and trivia questions and answers on various subjects, topics of kids, school, engineering students, medical aspirants, business management academics and software professionals.
Question-1. How do you read data from a file in Rebol?
Answer-1: Use the read function, e.g., data: read %file.txt.
Question-2. What is the make function in Rebol?
Answer-2: The make function creates new objects, series, or contexts.
Question-3. How do you handle errors in Rebol?
Answer-3: Use the try and catch constructs, e.g., attempt [code].
Question-4. What is an object in Rebol?
Answer-4: An object is a collection of named fields and values, created with make object!.
Question-5. How do you define an object in Rebol?
Answer-5: Use make object!, e.g., person: make object! [name: "Alice" age: 30].
Question-6. What is the foreach function in Rebol?
Answer-6: foreach iterates over series, e.g., foreach item [1 2 3] [print item].
Question-7. How does Rebol handle URLs?
Answer-7: URLs are a native data type in Rebol, e.g., url: http://example.com.
Question-8. What is the reduce function in Rebol?
Answer-8: reduce evaluates expressions inside a block and returns the results.
Question-9. How do you handle conditional branching in Rebol?
Answer-9: Use if, either, or case constructs.
Question-10. What is the switch construct in Rebol?
Answer-10: switch evaluates a value against multiple cases, e.g., switch x [1 [print "One"]].
Question-11. How do you define a global variable in Rebol?
Answer-11: Assign it without any special keyword, e.g., globalVar: 10.
Question-12. How do you define a local variable in Rebol?
Answer-12: Local variables are automatically scoped within functions or contexts.
Question-13. What is the unset! data type in Rebol?
Answer-13: unset! represents an uninitialized or undefined value.
Question-14. How do you check a variable's type in Rebol?
Answer-14: Use the type? function, e.g., type? 123.
Question-15. What is a port in Rebol?
Answer-15: A port is an abstraction for input/output operations, such as files or network streams.
Question-16. How do you create a graphical user interface (GUI) in Rebol?
Answer-16: Use the view and layout functions from Rebol's VID (Visual Interface Dialect).
Question-17. How do you handle time in Rebol?
Answer-17: Use the now function for the current time or wait for delays.
Question-18. How do you copy a block in Rebol?
Answer-18: Use the copy function, e.g., newBlock: copy oldBlock.
Question-19. What is the find function in Rebol?
Answer-19: find searches a series for a value, e.g., find [1 2 3] 2.
Question-20. How do you generate random numbers in Rebol?
Answer-20: Use the random function, e.g., random 100.
Question-21. How does Rebol handle arithmetic operations?
Answer-21: Rebol supports operators like +, -, *, /, and functions like add.
Question-22. What is the pick function in Rebol?
Answer-22: pick retrieves a value from a series by index, e.g., pick [1 2 3] 2.
Question-23. How do you define a word in Rebol?
Answer-23: A word is a symbol used as a variable, function, or keyword, e.g., word: 10.
Question-24. What is the trim function in Rebol?
Answer-24: trim removes whitespace from strings, e.g., trim " hello ".
Question-25. How do you use Rebol for web scraping?
Answer-25: Combine read with parse to fetch and process web pages.
Question-26. Why is Rebol considered a lightweight language?
Answer-26: Its small footprint, simple syntax, and built-in networking capabilities make it lightweight.
Question-27. What is Rebol?
Answer-27: Rebol is a lightweight, interpreted programming language designed for networked and distributed computing.
Question-28. Who developed Rebol?
Answer-28: Rebol was developed by Carl Sassenrath, the creator of the AmigaOS.
Question-29. What does "Rebol" stand for?
Answer-29: Rebol stands for "Relative Expression-Based Object Language."
Question-30. What are the main features of Rebol?
Answer-30: Features include a small footprint, cross-platform support, simplicity, and domain-specific dialects.
Question-31. What are dialects in Rebol?
Answer-31: Dialects are mini-languages tailored to specific tasks, created using Rebol's flexible syntax.
Question-32. How does Rebol handle data and code?
Answer-32: In Rebol, code and data are interchangeable, a concept called "homoiconicity."
Question-33. What is the basic syntax of Rebol?
Answer-33: Rebol uses a freeform syntax where expressions are evaluated from left to right.
Question-34. How do you define a variable in Rebol?
Answer-34: Use the syntax variable: value, e.g., x: 10.
Question-35. What is a block in Rebol?
Answer-35: A block is a collection of values enclosed in square brackets, e.g., [1 2 3].
Question-36. How do you create a function in Rebol?
Answer-36: Use the func keyword, e.g., square: func [x] [x * x].
Question-37. How does Rebol handle strings?
Answer-37: Strings are enclosed in double quotes, e.g., "Hello, World!".
Question-38. What is a series in Rebol?
Answer-38: A series is an ordered collection of values, such as a string, block, or file.
Question-39. How do you concatenate strings in Rebol?
Answer-39: Use the append function, e.g., append "Hello, " "World!".
Question-40. What are the data types in Rebol?
Answer-40: Rebol includes types like integer, decimal, string, block, URL, email, logic, and more.
Question-41. How do you comment code in Rebol?
Answer-41: Use a semicolon (;), e.g., ; This is a comment.
Question-42. What is the do function in Rebol?
Answer-42: The do function evaluates a block or string of Rebol code.
Question-43. How do you create a loop in Rebol?
Answer-43: Use constructs like repeat, e.g., repeat i 5 [print i].
Question-44. What is the if construct in Rebol?
Answer-44: The if construct evaluates a condition, e.g., if x > 5 [print "Greater"].
Question-45. How does Rebol handle networking?
Answer-45: Rebol provides built-in support for protocols like HTTP, FTP, and SMTP.
Question-46. How do you create a TCP connection in Rebol?
Answer-46: Use the open function with tcp://, e.g., conn: open tcp://localhost:8080.
Question-47. What is the probe function in Rebol?
Answer-47: The probe function displays the value of an expression for debugging.
Question-48. How do you parse data in Rebol?
Answer-48: Use the parse function with rules, e.g., parse "abc" [some "a"].
Question-49. What is the purpose of load in Rebol?
Answer-49: The load function converts text into Rebol values or code.
Question-50. How do you save data to a file in Rebol?
Answer-50: Use the write function, e.g., write %file.txt "Hello, World!".
Frequently Asked Question and Answer on Rebol
Rebol Interview Questions and Answers in PDF form Online
Rebol Questions with Answers
Rebol Trivia MCQ Quiz
