Data entry design: In an information system, a ‘‘form’’ primarily defines which aspects of how data is captured on screen?

Introduction / Context:
Forms are the user-facing artifacts for entering and reviewing data. Good form design ensures consistent capture, readable layout, and constrained inputs. This question focuses on two core responsibilities of forms: placement and field sizing.

Given Data / Assumptions:

• Forms specify visual layout: labels, fields, grouping.
• Forms define field dimensions or limits (e.g., width, max length).
• Other constraints (validation rules) may exist but are beyond the two items explicitly listed.

Concept / Approach:
A form controls where users see and input information and how much they can enter into each field (width/length). These two aspects are foundational to consistency and data quality during entry, whether on paper or on-screen.

Step-by-Step Solution:

Verification / Alternative check:
GUI builders and form designers always manage layout grids and field properties such as lengths and masks, confirming the role described.

Why Other Options Are Wrong:

• (a) only or (b) only: incomplete; forms manage both.
• All of the above: inappropriate when only two concrete aspects are offered.
• None of the above: contradicted by standard UI practice.

Common Pitfalls:
Assuming ‘‘All of the above’’ is always safest; evaluate exactly what is listed.

Final Answer:
Both (a) and (b)