Microprogrammed control and programming the basic computer: machine and assembly language, assemblers, loops, subroutines and I-O programming. - One Line Questions

1. Which of the following is a typical component of a subroutine's implementation? — A stack pointer
2. In the context of I/O programming, a 'device driver' is: — A software program that allows the operating system to communicate with an I/O device.
3. Machine language is: — A set of binary codes understood directly by the CPU.
4. A 'vertical microinstruction' format typically has: — A smaller number of bits, using encoding to represent control signals.
5. Which component is essential for implementing DMA? — A DMA Controller
6. What is an 'interrupt' in the context of I/O programming? — A signal from an I/O device to the CPU indicating it needs attention or has completed an operation.
7. In assembly programming, what is a 'register'? — A small, fast storage location within the CPU.
8. Which of the following is an example of a machine language instruction? — 1011000100000101
9. The process of converting assembly language into machine language is called: — Assembling
10. Which assembly language construct is commonly used to implement a loop? — Conditional jump instructions (e.g., JZ, JNZ)
11. When a subroutine is called, local variables are often stored on the: — Stack.
12. Which mechanism is commonly used to transfer data between the CPU and I/O devices? — All of the above
13. Direct Memory Access (DMA) allows I/O devices to: — Communicate directly with main memory without CPU intervention for each data transfer.
14. Which of the following is an advantage of using microprogramming? — Easier modification and updating of the control unit's functionality.
15. The 'CALL' instruction in assembly language typically performs two main actions: — Pushes the return address onto the stack and jumps to the subroutine.
16. A 'horizontal microinstruction' format is characterized by: — Each bit in the microinstruction directly controls a specific CPU component or signal.
17. An assembler is a program that translates: — Assembly language code into machine language.
18. A common characteristic of loops is that they require a condition for: — Continuing or exiting the loop.
19. The main advantage of using subroutines is: — Code reusability and modularity.
20. What is the outcome of a 'jump' instruction in assembly language? — It causes the program execution to transfer to a different location in the code.
21. Which instructions are typically used to manage subroutine calls and returns? — CALL and RET
22. A sequence of microinstructions stored in control memory that dictates the operation of the CPU is called a: — Microprogram
23. Which of the following best describes the relationship between machine language, assembly language, and microprogramming? — Microprogramming controls the CPU's hardware to execute machine language instructions, which assembly language represents symbolically.
24. What is the main difference between machine language and assembly language? — Machine language is binary, while assembly language uses mnemonics.
25. Assembly language uses mnemonics to represent: — Machine instructions and data.
26. I/O programming often involves interacting with: — Input/Output controllers and device registers.
27. What is the primary difference between microprogramming and hardwired control? — Microprogramming uses software (microinstructions), while hardwired control uses dedicated logic gates.
28. Which of the following represents a common mnemonic for an addition operation in assembly language? — ADD
29. Which of the following is NOT a typical component of a basic assembly language instruction? — Microinstruction bits
30. An I/O instruction in assembly language might be used to: — Load data from an input device or send data to an output device.
31. The 'RET' instruction at the end of a subroutine typically: — Pushes the return address from the stack back into the program counter.
32. What is a disadvantage of microprogramming? — Potentially slower execution of instructions compared to hardwired control.
33. Interrupt-driven I/O is generally more efficient than Programmed I/O because: — The CPU does not waste time polling devices.
34. In Programmed I/O (PIO), how does the CPU handle data transfer with an I/O device? — The CPU continuously polls the status of the I/O device.
35. In the context of I/O programming, 'polling' refers to: — The CPU repeatedly checking the status of an I/O device.
36. When programming the Basic Computer, the instruction set determines: — The operations the computer can perform.
37. What is the role of the instruction set architecture (ISA) in microprogramming? — To specify the set of machine instructions that the CPU can execute.
38. What is the primary role of a microprogrammed control unit in a CPU? — To generate control signals based on a sequence of microinstructions.
39. What is the primary function of an assembler? — To convert symbolic assembly code into binary machine code.
40. What is the primary purpose of the 'micro-operations' defined in microprogramming? — To define the fundamental steps of CPU operation at the hardware level.
41. What is the primary purpose of a subroutine? — To execute a block of code multiple times from different parts of the program.
42. What is the role of the stack in subroutine calls? — To save the return address so the program can resume after the subroutine finishes.
43. In microprogramming, what is the purpose of the Control Memory (CM)? — To store the microprogram that controls the CPU's operations.
44. What is the purpose of a 'loop' in programming? — To perform a set of instructions repeatedly.
45. The term 'Basic Computer' in the context of this topic typically refers to a simplified model of a computer used for educational purposes, often with a fixed instruction set. — True
46. A 'control word' in microprogramming typically contains: — Bits that directly control the data path and operations of the CPU.
47. Which of the following is a common way to represent conditional branching in assembly language? — Using comparison instructions (e.g., CMP) followed by conditional jump instructions (e.g., JE, JNE).
48. A 'subroutine' in assembly programming is analogous to a ______ in high-level languages. — Function or Procedure
49. I/O programming refers to: — Writing programs that interact with input and output devices.
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