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Question-1. What is QB64?
Answer-1: QB64 is a modern BASIC compiler that is compatible with Microsoft QuickBASIC 4.5. It allows running old QuickBASIC programs on modern operating systems.
Question-2. Who developed QB64?
Answer-2: QB64 was initially developed by Galleon and is now maintained by the QB64 community.
Question-3. What operating systems does QB64 support?
Answer-3: QB64 runs on Windows, Linux, and macOS.
Question-4. What is the file extension for a QB64 source code file?
Answer-4: The source files use the .bas extension.
Question-5. How does QB64 differ from QuickBASIC?
Answer-5: QB64 supports modern graphics, audio, and networking while maintaining compatibility with QuickBASIC.
Question-6. Is QB64 an interpreter or compiler?
Answer-6: QB64 is a compiler that converts BASIC code into C++ and then compiles it into an executable file.
Question-7. Can QB64 run old QuickBASIC programs?
Answer-7: Yes, QB64 is designed to run legacy QuickBASIC programs without modification.
Question-8. Does QB64 support 64-bit operating systems?
Answer-8: Yes, QB64 supports both 32-bit and 64-bit operating systems.
Question-9. Can QB64 create standalone executable files?
Answer-9: Yes, QB64 compiles standalone EXE files that do not require an external runtime.
Question-10. What command is used to print text on the screen in QB64?
Answer-10: Example: PRINT "Hello, World!"
Question-11. How do you declare a variable in QB64?
Answer-11: Example: DIM x AS INTEGER
Question-12. What is the command to read user input in QB64?
Answer-12: INPUT "Enter your name: ", username$
Question-13. Can QB64 handle graphics programming?
Answer-13: Yes, QB64 has built-in support for graphics, colors, and pixel manipulation.
Question-14. What command is used to draw a circle in QB64?
Answer-14: CIRCLE (320, 240), 100, 15 (Draws a circle at (320,240) with radius 100 and color 15).
Question-15. How can you create a delay in QB64?
Answer-15: Using SLEEP (in seconds) or _DELAY (in fractions of a second).
Question-16. Can QB64 play sound?
Answer-16: Yes, using commands like SOUND frequency, duration and _SNDPLAYFILE for audio files.
Question-17. What is the equivalent of a function in QB64?
Answer-17: Functions are defined using FUNCTION and END FUNCTION.
Question-18. How do you create a loop in QB64?
Answer-18: Using FOR?NEXT, WHILE?WEND, or DO?LOOP.
Question-19. What is the purpose of DIM in QB64?
Answer-19: DIM is used to declare variables and arrays.
Question-20. What command clears the screen in QB64?
Answer-20: CLS (Clear Screen).
Question-21. How do you define an array in QB64?
Answer-21: DIM numbers(10) AS INTEGER (declares an integer array with 11 elements from 0 to 10).
Question-22. What is DATA used for in QB64?
Answer-22: DATA stores a list of values for later retrieval using READ.
Question-23. How can you generate random numbers in QB64?
Answer-23: RANDOMIZE TIMER followed by RND.
Question-24. Does QB64 support file handling?
Answer-24: Yes, QB64 supports file operations using OPEN, INPUT, OUTPUT, and CLOSE.
Question-25. How do you open a file for writing in QB64?
Answer-25: OPEN "file.txt" FOR OUTPUT AS #1
Question-26. What command reads a line from a file in QB64?
Answer-26: LINE INPUT #1, text$
Question-27. How do you close a file in QB64?
Answer-27: CLOSE #1
Question-28. Can QB64 handle mouse input?
Answer-28: Yes, using _MOUSEINPUT, _MOUSEX, and _MOUSEY.
Question-29. What is the use of GOTO in QB64?
Answer-29: GOTO allows jumping to a specific line label. However, it is discouraged in structured programming.
Question-30. What is IF?THEN used for in QB64?
Answer-30: It is used for conditional execution of statements.
Question-31. How do you declare a subroutine in QB64?
Answer-31: Using SUB SubName and END SUB.
Question-32. What is SELECT CASE used for in QB64?
Answer-32: It is used for multi-way decision-making instead of multiple IF?THEN statements.
Question-33. How do you exit a loop in QB64?
Answer-33: Using EXIT FOR, EXIT DO, or EXIT WHILE.
Question-34. What command sets the screen resolution in QB64?
Answer-34: SCREEN mode (e.g., SCREEN 12 for 640x480 graphics mode).
Question-35. Can QB64 use inline assembly language?
Answer-35: No, QB64 does not support inline assembly.
Question-36. How do you detect a key press in QB64?
Answer-36: Using INKEY$.
Question-37. How do you check if a number is even in QB64?
Answer-37: IF num MOD 2 = 0 THEN PRINT "Even"
Question-38. What is the default numeric type in QB64?
Answer-38: Single-precision floating-point (SINGLE).
Question-39. How do you format numbers in QB64?
Answer-39: Using PRINT USING (e.g., PRINT USING "#.##"; 3.14159).
Question-40. What is _DISPLAY used for in QB64?
Answer-40: _DISPLAY updates the screen only when called, preventing flickering in animations.
Question-41. How do you detect screen resolution in QB64?
Answer-41: _WIDTH and _HEIGHT return the screen dimensions.
Question-42. Can QB64 connect to the internet?
Answer-42: Yes, using external libraries and networking functions.
Question-43. How do you handle errors in QB64?
Answer-43: Using ON ERROR GOTO and RESUME.
Question-44. What is the maximum array size in QB64?
Answer-44: Limited by system memory.
Question-45. Can QB64 work with external libraries?
Answer-45: Yes, QB64 supports dynamic link libraries (DLLs).
Question-46. What command gets the system date in QB64?
Answer-46: DATE$ returns the current system date.
Question-47. How do you pause execution in QB64?
Answer-47: Using SLEEP or INPUT "Press any key to continue"; a$.
Question-48. What command returns the ASCII value of a character in QB64?
Answer-48: ASC("A") returns 65.
Question-49. How do you convert a string to uppercase in QB64?
Answer-49: Using UCASE$().
Question-50. What are some alternatives to QB64?
Answer-50: FreeBASIC, SmallBASIC, and FreeBASIC QB mode.
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