MCQ IN COMPUTER SCIENCE & ENGINEERING

COMPUTER SCIENCE AND ENGINEERING

COMPUTER ARCHITECTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Select a drawback of making a dual core or quad core CPU, rather than a single core one.
A
they are more expensive to design and make, and they also use more power than single or dual core processors.
B
they are larger in size, thus requiring a larger case.
C
they produce a lot of heat, so wont require a heat sink as a result.
D
They are easier to design and make, and they also use less power than single or dual core CPUs.
Explanation: 

Detailed explanation-1: -Multi-core chips also allow higher performance at lower energy. This can be a big factor in mobile devices that operate on batteries. Since each core in a multi-core CPU is generally more energy-efficient, the chip becomes more efficient than having a single large monolithic core.

Detailed explanation-2: -Con: Shared Cache A quad-core with only 8 MB of shared cache, therefore, reserves only 2 MB per core. Similarly, the Front Side Bus, or FSB, which connects the processor to the memory, can become a bottleneck as four cores choke up writing to the memory.

Detailed explanation-3: -Dual-core Disadvantages over Multi-core Dual-core processors are not able to handle as many tasks at the same time as efficiently as multi-core processors. Multi-core processors have the same advantages over dual-core processors that dual-core processors have over single core processors.

Detailed explanation-4: -Overall, a quad-core processor is going to perform faster than a dual-core processor for general computing. Each program you open will work on its own core, so if the tasks are shared, the speeds are better.

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