Salesforce User-Experience-Designer Based on Real Exam Environment

A grid system is a set of columns and rows that help to organize and align the layout and content of a web page. The Salesforce Lightning Design System (SLDS) provides a responsive grid system that adapts to different screen sizes and devices. The SLDS grid system is based on the CSS Flexbox layout module, which allows for flexible and dynamic positioning of elements. The SLDS grid system consists of the following components1:

• Containers: These are the outermost elements that wrap the grid. They have a fixed width that changes according to the breakpoints defined by the SLDS. Breakpoints are the points at which the layout changes based on the screen size. The SLDS has four breakpoints: small, medium, large, and x-large2.
• Grids: These are the direct children of the containers. They are the main elements that define the grid structure. They have a display property of flex, which enables the flexbox layout. They can also have modifiers that control the alignment, direction, and wrapping of the grid items3.
• Grid items: These are the direct children of the grids. They are the elements that contain the actual content of the page. They have a flex property that determines how much space they take up in the grid. They can also have modifiers that control the order, offset, and visibility of the grid items4.

A UX Designer should use the SLDS grid system to design responsively within the SLDS, as it provides a consistent and flexible way to create layouts that work across different devices and screen sizes. The SLDS grid system also follows the SLDS design principles and best practices, such as clarity, efficiency, consistency, and beauty5.

References:

• Grid - Lightning Design System, Grid - Lightning Design System Grid HTML/CSS: Dev Ready Responsive Terms of Service Privacy Responsible Disclosure Trust Cookies Settings Your Privacy Choices © Copyright 2015-present Salesforce, Inc. All rights reserved. Various trademarks held by their respective owners.
• Breakpoints - Lightning Design System, Breakpoints - Lightning Design System Breakpoints HTML/CSS: Dev Ready Responsive Terms of Service Privacy Responsible Disclosure Trust Cookies Settings Your Privacy Choices © Copyright 2015-present Salesforce, Inc. All rights reserved. Various trademarks held by their respective owners.
• Grid - Lightning Design System, Grid - Lightning Design System Grid HTML/CSS: Dev Ready Responsive Terms of Service Privacy Responsible Disclosure Trust Cookies Settings Your Privacy Choices © Copyright 2015-present Salesforce, Inc. All rights reserved. Various trademarks held by their respective owners.
• Grid - Lightning Design System, Grid - Lightning Design System Grid HTML/CSS: Dev Ready Responsive Terms of Service Privacy Responsible Disclosure Trust Cookies Settings Your Privacy Choices © Copyright 2015-present Salesforce, Inc. All rights reserved. Various trademarks held by their respective owners.
• Design Principles - Lightning Design System, Design Principles - Lightning Design System Design Principles HTML/CSS: Dev Ready Responsive Terms of Service Privacy Responsible Disclosure Trust Cookies Settings Your Privacy Choices © Copyright 2015-present Salesforce, Inc. All rights reserved. Various trademarks held by their respective owners.

A lookup relationship is a type of relationship that links two objects together, but the relationship is not required. This means that the child object can exist independently of the parent object. A lookup relationship can be either one-to-many or many-to-one, depending on the cardinality of the objects involved. For example, a contact can have a lookup relationship to an account, which means that a contact can belong to one account, but an account can have many contacts. Alternatively, a custom object can have a lookup relationship to a user, which means that a custom object can belong to many users, but a user can have only one custom object record. References: Trailhead: Data Modeling, Trailhead: Salesforce User Experience Designer Certification Prep, Salesforce Help: Define Lookup Relationships

The SLDS BEM naming convention consists of three parts: block, element, and modifier. A block is a standalone component that can be reused across projects, such as a button, a card, or a modal. An element is a part of a block that has no standalone meaning, such as a label, an icon, or a header. A modifier is a flag that changes the appearance or behavior of a block or an element, such as size, color, or state. The modifier is separated from the block or element by two hyphens (–), and can have a value separated by a single hyphen (-), such as .slds-button–brand or .slds-button–neutral. The class .slds–size-l-of-2 does not follow thisconvention because it has no block or element name before the modifier. It should be something like .slds-grid–size-l-of-2 or .slds-col–size-l-of-2. References:

• [1]: Salesforce Lightning Design System - Introduction
• [2]: Salesforce Lightning Design System - Naming Con

According to the Web Content Accessibility Guidelines (WCAG) 2.1, the minimum color contrast ratio for normal text is4.5:11. This means that the difference in brightness (luminance) between the text color and the background color should be at least 4.5 times.This ensures that the text is readable by people with moderately low vision, color deficiencies, or contrast sensitivity1. The contrast ratio can be calculated using the formula:

L2​+0.05L1​+0.05​

whereL1​is the relative luminance of the lighter color andL2​is the relative luminance of the darker color2.The relative luminance is a value between 0 and 1, where 0 is black and 1 is white2.The contrast ratio can range from 1:1 (white on white) to 21:1 (black on white)2.

The contrast ratio requirement for normal text is lower for larger text or bold text, as they are easier to read at lower contrast.For large text (18 point or 14 point bold), the minimum contrast ratio is3:11.For graphics and user interface components, such as form input borders, the minimum contrast ratio is also3:13.For level AAA conformance, the minimum contrast ratio for normal text is7:1and for large text is4.5:11.

To evaluate the color contrast ratio of a site, there are various tools available, such as theContrast Checkeror theContrast Ratiotool. These tools allow users to enter the text color and the background color and see the contrast ratio and whether it meets the WCAG guidelines. They also provide suggestions for improving the contrast ratio if needed.

References:

• Understanding Success Criterion 1.4.3: Contrast (Minimum)
• Contrast Ratio - WCAG Color Contrast Checker
• WebAIM: Contrast Checker
• WCAG: Accessible colour and contrast ratios
• Contrast ratio - WCAG WG