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Question-1. What is Pascal?
Answer-1: Pascal is a high-level, procedural programming language developed in the late 1960s.
Question-2. Who created Pascal?
Answer-2: Pascal was created by Niklaus Wirth in 1970.
Question-3. What was the main purpose of developing Pascal?
Answer-3: Pascal was developed to encourage structured programming and teaching computer science.
Question-4. What is the syntax for defining a variable in Pascal?
Answer-4: var VariableName: DataType;
Question-5. What are the key features of Pascal?
Answer-5: Key features include structured programming, strong typing, and readability.
Question-6. How does Pascal handle loops?
Answer-6: Pascal supports for, while, and repeat...until loops.
Question-7. What is the significance of begin and end in Pascal?
Answer-7: begin and end enclose a block of statements, similar to braces {} in C.
Question-8. What is a procedure in Pascal?
Answer-8: A procedure is a subroutine that performs a task but does not return a value.
Question-9. What is a function in Pascal?
Answer-9: A function is a subroutine that returns a value.
Question-10. What is the purpose of the program keyword in Pascal?
Answer-10: The program keyword declares the program's name and marks the start of the code.
Question-11. What is the difference between read and readln in Pascal?
Answer-11: read reads input without moving to the next line, while readln moves to the next line after reading.
Question-12. What is the difference between write and writeln in Pascal?
Answer-12: write outputs text without a newline; writeln adds a newline after outputting.
Question-13. What is the role of const in Pascal?
Answer-13: const is used to define constants, which are immutable values.
Question-14. How are arrays declared in Pascal?
Answer-14: Arrays are declared using the syntax: var ArrayName: array[IndexRange] of DataType;
Question-15. What is a record in Pascal?
Answer-15: A record is a data structure that groups related variables of different types.
Question-16. How are strings handled in Pascal?
Answer-16: Pascal uses the string type, which is a sequence of characters.
Question-17. What is the role of type in Pascal?
Answer-17: type defines new data types to improve code readability and reuse.
Question-18. How does Pascal support modular programming?
Answer-18: Modular programming is supported through procedures, functions, and units.
Question-19. What are units in Pascal?
Answer-19: Units are reusable modules of code containing variables, procedures, and functions.
Question-20. How does Pascal handle file operations?
Answer-20: Pascal uses file variables and procedures like assign, reset, rewrite, and close.
Question-21. What is the syntax for an if statement in Pascal?
Answer-21: if Condition then Statement;
Question-22. How does Pascal implement case statements?
Answer-22: The case statement provides a multi-way branch based on the value of an expression.
Question-23. What is the default file extension for Pascal source files?
Answer-23: The default file extension is .pas.
Question-24. What is a pointer in Pascal?
Answer-24: A pointer is a variable that stores the memory address of another variable.
Question-25. What is the purpose of new and dispose in Pascal?
Answer-25: new allocates memory for a pointer, and dispose deallocates it.
Question-26. What are the basic data types in Pascal?
Answer-26: Basic data types include integer, real, char, boolean, and string.
Question-27. How does Pascal handle typecasting?
Answer-27: Typecasting is done using functions like ord, chr, and trunc.
Question-28. What is the role of with in Pascal?
Answer-28: with simplifies access to fields of a record variable.
Question-29. What is the maximum value of an integer in standard Pascal?
Answer-29: The maximum value depends on the implementation but is typically 32767.
Question-30. How does Pascal handle dynamic memory allocation?
Answer-30: Dynamic memory allocation is handled using pointers and the new keyword.
Question-31. What are enumerated types in Pascal?
Answer-31: Enumerated types define a set of named values, e.g., type Colors = (Red, Green, Blue);.
Question-32. How does Pascal support structured programming?
Answer-32: Structured programming is supported through procedures, functions, and control structures.
Question-33. What is the difference between goto and structured control statements?
Answer-33: goto provides an unconditional jump, whereas structured control statements are safer and more readable.
Question-34. How does Pascal handle error checking?
Answer-34: Pascal performs compile-time error checking due to its strong typing.
Question-35. What are the relational operators in Pascal?
Answer-35: Relational operators include =, <, >, <=, >=, and <>.
Question-36. What is the role of mod in Pascal?
Answer-36: mod calculates the remainder of a division operation.
Question-37. What are sets in Pascal?
Answer-37: Sets are unordered collections of elements, defined using the set of keyword.
Question-38. What is the role of repeat...until in Pascal?
Answer-38: repeat...until executes a block of code until a condition becomes true.
Question-39. How does Pascal implement recursion?
Answer-39: Pascal supports recursion by allowing functions and procedures to call themselves.
Question-40. What is the purpose of the exit statement in Pascal?
Answer-40: exit terminates the current procedure or function immediately.
Question-41. What is a nested procedure in Pascal?
Answer-41: A nested procedure is a procedure defined within another procedure or function.
Question-42. What is the significance of strong typing in Pascal?
Answer-42: Strong typing prevents type errors and ensures safer code.
Question-43. What is the role of the for loop in Pascal?
Answer-43: The for loop iterates over a range of values with a fixed step.
Question-44. How does Pascal handle boolean expressions?
Answer-44: Boolean expressions evaluate to true or false and use logical operators like and, or, and not.
Question-45. What is the inc procedure in Pascal?
Answer-45: inc increments the value of a variable by a specified amount.
Question-46. What is the difference between real and double in Pascal?
Answer-46: real is single-precision, while double is double-precision floating-point.
Question-47. What is a packed record in Pascal?
Answer-47: A packed record uses less memory by storing data more compactly.
Question-48. What is the difference between global and local variables in Pascal?
Answer-48: Global variables are accessible throughout the program, while local variables are restricted to their scope.
Question-49. How does Pascal handle function overloading?
Answer-49: Standard Pascal does not support function overloading, but some implementations do.
Question-50. What is the role of the halt procedure in Pascal?
Answer-50: halt terminates the program immediately and optionally returns an exit code.
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