G11 1.1.2 MEGA MINI

Which of the following best describes a key reason why CISC processors require fewer lines of assembly code?

• They execute all instructions in a single cycle.

• They utilize pipelining to optimize execution.

• They support complex instructions that perform multiple operations in one step.

• They use fewer transistors to reduce instruction complexity.

Why do RISC processors achieve greater energy efficiency compared to CISC processors?

• They require more transistors, reducing power leakage.

• They execute instructions in multiple clock cycles.

• They limit the number of instructions available, simplifying execution.

• They allow software to optimize hardware execution.

What is the main advantage of RISC processors in terms of instruction execution?

• They can process instructions without decoding them.

• Each instruction executes in a single clock cycle.

• They use microcode for better instruction flexibility.

• They store instructions in cache memory for faster execution.

Why is pipelining more effective in RISC processors compared to CISC processors?

• RISC has a uniform instruction length, allowing instructions to be fetched and executed in parallel.

• CISC processors have more cache memory, making pipelining inefficient.

• RISC processors use larger instruction sets that optimize execution.

• Pipelining in RISC is only effective in embedded systems.

Which real-world application is most likely to use a CISC-based processor?

• Smartphones

• Embedded systems

• Supercomputers

• Desktop computers

Why do modern smartphones primarily use ARM-based RISC processors?

• They require high energy efficiency and low power consumption.

• They need more instruction complexity to run mobile applications.

• They use a modified version of CISC with microcode.

• They need complex instruction sets for multitasking.

What is a key disadvantage of CISC architecture?

• It increases the compiler's workload.

• It makes software optimization harder.

• It leads to higher power consumption due to complex instruction execution.

• It prevents the use of high-level programming languages.

Which of the following accurately describes the execution model of a RISC processor?

• Instructions are converted into microinstructions before execution.

• A single instruction executes in one cycle using a simple operation.

• Each instruction can perform multiple actions like loading and storing data simultaneously.

• Instructions are broken down into variable-length segments for efficiency.

Why don’t all applications benefit equally from multicore processors?

• Many applications are not designed to parallelize tasks across multiple cores.

• Multicore processors always run at lower clock speeds.

• More cores reduce individual processing efficiency.

• Operating systems cannot allocate threads effectively.

Which of the following describes Amdahl’s Law in relation to multicore processing?

• Performance scales directly with the number of cores in a system.

• The theoretical speedup of a system is limited by its sequential processing portion.

• Increasing clock speed is more important than adding cores.

• Parallel execution eliminates all performance bottlenecks.