SIPO Recognition — Which shift register type inherently requires access to all Q outputs of each stage to use the data?

Introduction:
Different shift register configurations expose data at different interfaces. Some deliver bits serially, while others present a word on parallel output pins. Identifying which type needs access to all Q outputs helps clarify how data is retrieved from the structure.

Given Data / Assumptions:

• Shift register stages each have an output (Q).
• We are comparing SISO, SIPO, PISO, and related variants.
• “Requires access to all Q outputs” means you must read each stage’s Q pin to obtain the word.

Concept / Approach:
A serial-in/parallel-out (SIPO) register accepts data serially but makes the accumulated contents available as a parallel word. To read that word, the system connects to each stage’s Q pin (one per bit). In contrast, SISO streams data out on one serial line; PISO loads a word in parallel but shifts it out serially; neither requires external access to all Q pins for normal operation.

Step-by-Step Solution:

Verification / Alternative check:

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