Central Processing Unit (CPU)

Correct Answer: ARM

ARM (Advanced RISC Machine) is the correct answer for the CPU architecture commonly used in mobile devices and designed to consume less power. ARM processors are specifically designed for low power consumption, making them ideal for mobile devices where battery life is crucial. They use a Reduced Instruction Set Computing (RISC) architecture, which simplifies the instruction set and allows for more efficient power usage. x86-64 is primarily used in desktop and laptop computers, and it's not optimized for low power consumption. It's more focused on high performance for general-purpose computing. RISC-V is an open-source instruction set architecture that's gaining popularity, but it's not as widely adopted in mobile devices as ARM. MIPS (Microprocessor without Interlocked Pipeline Stages) was once used in some mobile devices, but it has been largely replaced by ARM in the mobile market due to ARM's superior power efficiency and ecosystem support.

Correct Answer: Overheating CPU; clean the CPU cooler and reapply thermal paste

The sudden computer shutdown during high-performance tasks is most likely caused by an overheating CPU. The most efficient solution would be to clean the CPU cooler and reapply thermal paste. The other options proposed are not likely to cause sudden shutdowns during high-performance tasks and would not address the primary issue of the overheating CPU.

Correct Answer: Apply a pea-sized amount of thermal paste

Applying a pea-sized amount of thermal paste ensures there is optimal thermal conductivity between the CPU and the cooler. While applying too much or too little thermal paste, or using none, may hinder the cooling efficiency. Placing additional fans around the cooler won't fix a problem with the thermal paste application. Water is not a suitable substitute for thermal paste.