Choose the correct statement: In ________, quantities are not represented by continuously variable indicators but by discrete symbols (for example, 0 and 1).

Introduction / Context:
Information can be represented in continuous or discrete ways. This distinction underlies the difference between analog and digital systems, with implications for noise immunity, storage, and processing.

Given Data / Assumptions:

• Analog uses continuous ranges of values.
• Digital uses discrete symbols, typically binary digits 0 and 1.
• We are choosing which representation is non-continuous.

Concept / Approach:
Digital representation maps quantities to a finite set of symbols. Each symbol can be transmitted, stored, and processed with robustness to noise through thresholds and error correction. Analog representation, by contrast, maps directly to continuously varying voltages or currents.

Step-by-Step Solution:

Verification / Alternative check:
Digital communication systems encode voice, image, and data into bits precisely because discrete symbols are easier to regenerate and store.

Why Other Options Are Wrong:
analog representation: explicitly continuous, not discrete.

signal representation: too broad and not specific to discreteness.

computer representation: computers use digital internally, but the phrase is vague and not a formal category.

Common Pitfalls:
Equating “digital” with “perfect”; while discrete, digital still contends with quantization noise and implementation limits.

Final Answer:
digital representation