New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Computer Architecture Which architectural feature is

    crucial for improving the performance of modern multi-core processors?
    A Increasing the clock speed of individual cores Correct Answer Incorrect Answer
    B Reducing transistor size to enhance energy efficiency Correct Answer Incorrect Answer
    C Implementing cache coherence protocols for shared memory Correct Answer Incorrect Answer
    D Using Harvard Architecture instead of Von Neumann Architecture Correct Answer Incorrect Answer
    E Designing processors with higher instruction-level parallelism Correct Answer Incorrect Answer

    Solution

    Cache coherence protocols are essential for ensuring consistency in data across multiple cores in a shared memory architecture. In multi-core systems, each core typically has its own private cache. If one core modifies data in its cache, other cores accessing the same memory region must be updated to maintain consistency. Protocols like MESI (Modified, Exclusive, Shared, Invalid) handle these updates efficiently, reducing the risk of data inconsistencies and improving system performance. Without proper cache coherence, applications running on multi-core processors could experience errors, bottlenecks, or degraded performance due to stale or inconsistent data being accessed. Why Other Options Are Incorrect:

    • A) Increasing clock speed is limited by thermal and energy constraints in modern processors.
    • B) Reducing transistor size improves energy efficiency but does not directly address performance issues in multi-core architectures.
    • D) Harvard Architecture separates instruction and data memory but is not a critical factor in multi-core performance.
    • E) Instruction-level parallelism focuses on executing multiple instructions within a single core and does not address multi-core-specific challenges.

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