A major disadvantage of the mask ROM is that ____________a)It is time consuming to change the stored data when system requirements changeb)It is very expensive to change the stored data when system requirements changec)It cannot be reprogrammed if stored data needs to be changedd)It has an extremely short life expectancy and requires frequent replacementCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Understanding Mask ROM
Mask ROM (Read-Only Memory) is a type of non-volatile memory that is used to store permanent data. It is created during the manufacturing process, which means that the data written into it cannot be changed or modified after it is produced.
Disadvantages of Mask ROM
- Reprogramming Limitation:
- The significant disadvantage of mask ROM is that it cannot be reprogrammed. Once the data is written during the manufacturing phase, any changes to system requirements or data needs cannot be accommodated without creating a new chip.
- Cost and Time Issues:
- While options A and B discuss the expense and time-consuming nature of changing data, they are not entirely accurate regarding mask ROM. Though it's true that modifying data is costly and time-consuming, the core issue is the fundamental inability to change the data itself.
- Lifespan Misconception:
- Option D mentions life expectancy, which is misleading. Mask ROM has a long lifespan and does not require frequent replacement, unlike some other memory types.
Conclusion
In summary, the correct answer is option C because the inability to reprogram mask ROM makes it less flexible and adaptable to changes in system requirements. This limitation can lead to increased costs in the long run if system updates are necessary. Therefore, understanding the characteristics of mask ROM is crucial for making informed decisions in system design and memory allocation.

Answer

A major disadvantage of the mask ROM is that it cannot be reprogrammed if stored data needs to be changed. PROM stands for Programmable Read Only Memory in which the ROM can be externally programmed by the user. EPROM stands for Erasable Programmable Read Only Memory, where the ROM and be cleared and re-programmed.

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