In modern CPUs, what technique is used to execute multiple instructions simultaneously?

Correct option is B

The correct answer is: (B) Pipelining

Explanation:

• Pipelining is a technique used in modern Central Processing Units (CPUs) to execute multiple instructions simultaneously by dividing the instruction cycle into different stages.
• While one instruction is being executed, another can be decoded, and a third can be fetched, all at the same time — like an assembly line.

Information Booster:

• Pipelining increases instruction throughput and improves CPU performance.
• The stages typically include Fetch, Decode, Execute, Memory Access, and Write Back.
• It allows for parallelism within the processor.
• Advanced CPUs may also use superscalar architecture and out-of-order execution for even more efficiency.
• Pipelining can be affected by hazards (data, control, and structural).

Additional Information:

• Clock Synchronizing: Ensures operations happen in step with the CPU clock but doesn't enable parallel instruction execution.
• Serial Processing: Executes one instruction at a time, sequentially — not parallel.
• Sequential Execution: Same as serial; no overlap of instruction execution.