Note: The widely accepted answer is (3) DMA (Direct Memory Access), as it is designed specifically to handle data transfer between memory and peripherals without CPU intervention.
However, if DDA (Digital Differential Analyzer) is considered in this context (e.g., in specialized systems or questions where DDA has a broader functional meaning), it may be marked as correct based on specific syllabus or exam keys.
In the design of a control unit of a processor, two common approaches are used: hardware control and microprogrammed control. Consider the following statements:
I. Hardware control units are generally faster but more difficult to modify than microprogrammed control units.
II. In a horizontal microprogrammed control unit, each control signal has a separate bit in the control word.
III. Vertical microprogramming leads to longer control words but provides greater parallelism.
IV. Microprogrammed control units are typically easier to implement and modify than hardware control units.
Consider the following statements followed by two conclusions.
Statements: 1. Some men are great. 2. Some men are wise.
Conclusions: 1. Men are either great or wise. 2. Some men are neither great nor wise. Choose the correct option: