Instruction Formats MCQs

By: Prof. Dr. Fazal Rehman | Last updated: June 19, 2025

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1. : What is the primary purpose of an instruction format?





2. : Which part of an instruction format specifies the operation to be performed?





3. : In an instruction format, what is the function of the operand field?





4. : What does the address field in an instruction format typically specify?





5. : Which of the following is a common component of an instruction format?





6. : The field in an instruction format that determines how the operand is interpreted is known as:





7. : In a typical instruction format, which field contains the binary code for the operation?





8. : What is the function of the mode field in an instruction format?





9. : Which instruction format component specifies the register used in the operation?





10. : What does an instruction format with a variable length allow?





11. : In a fixed-length instruction format, each instruction is:





12. : Which field in an instruction format specifies whether an operand is immediate or memory-based?





13. : The instruction format used to specify operations and their operands directly is known as:





14. : In which instruction format are the source and destination operands specified?





15. : What does the immediate field in an instruction format specify?





16. : Which type of instruction format uses opcode and an immediate value?





17. : In an instruction format, the field that identifies the register used as a source operand is called:





18. : Which instruction format component is used to determine if an operand is a direct or indirect address?





19. : What is typically found in the opcode field of an instruction format?





20. : In a memory-based instruction format, the address field specifies:





21. : Which field in an instruction format can vary in size depending on the architecture?





22. : What does the instruction format component ‘address’ typically provide?





23. : The field in an instruction format that encodes whether an operation is to be performed using data from a register or memory is called:





24. : Which instruction format component identifies the location where the result of an operation is to be stored?





25. : The format that uses a fixed size for all instructions is called:





26. : What does the ‘register field’ in an instruction format typically specify?





27. : In an instruction format, what is the role of the opcode field?





28. : Which field in an instruction format determines if an operand is an immediate value or a memory address?





29. : In a variable-length instruction format, the length of each instruction is:





30. : What does an instruction format’s ‘immediate value’ field represent?





31. : The field used to specify a relative jump or branch target in an instruction format is called:





32. : Which type of instruction format includes both source and destination operands in the same format?





33. : In instruction formats, the term ‘addressing mode’ refers to:





34. : The field in an instruction format that specifies the memory address of an operand is known as:





35. : Which instruction format uses a combination of an opcode and a memory address for specifying operands?





36. : The field that contains the actual operation to be performed is known as:





37. : In which format are operations typically performed using registers only?





38. : Which field in an instruction format helps in identifying the operation type and its parameters?





39. : What does the mode field in an instruction format usually determine?





40. : In an instruction format, what does the ‘address’ field specify in a branching instruction?





41. : Which instruction format includes both an opcode and a register number to specify operations?





42. : What is the main characteristic of a fixed-length instruction format?





43. : Which component of an instruction format specifies the type of addressing used?





44. : In an instruction format, the immediate value is typically used to:





45. : Which type of instruction format is suitable for complex addressing requirements?





46. : What does the term ‘register field’ in an instruction format refer to?





47. : In an instruction format, the field that directly specifies an operation’s address is known as:





48. : What is the primary role of the opcode in an instruction format?





49. : Which format is used when an instruction involves immediate data and a register?





50. : The instruction format that includes fields for both source and destination operands is typically:





51. : What does a variable-length instruction format allow for?





52. : Which field in an instruction format specifies the operation code to be executed?





53. : In an instruction format, which field typically contains an address for memory operations?





54. : Which type of instruction format is suitable for simple operations with a constant value?





 

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