Q1. What is the difference between single quotes and double quotes?
Single quotes preserve everything literally, while double quotes allow variable expansion, command substitution and some escape sequences. ```bash name="world" echo 'hell...
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Q2. What is the difference between aria-label and aria-labelledby?
Both give an element an accessible name, but they work differently. aria-label sets the name directly to a string, for example a button with aria-label="Close dialog". ar...
Q3. How do responsive and dark-mode variants work in Tailwind?
Tailwind encodes variants as prefixes. Responsive breakpoints are mobile-first: sm, md, lg, xl and 2xl apply at that minimum width and above. ```html ... ``` That element...
Q4. What is encapsulation and why does it matter?
Encapsulation means bundling data with the operations that act on it and restricting direct access to the internals. The class exposes a deliberate public API and keeps f...
Q5. Why is semantic HTML preferred over divs with ARIA?
Semantic HTML uses elements that describe meaning: header, nav, main, section, article, aside, footer, button, label, table and ul. Assistive technologies and browsers de...
Q6. How do you write a custom Tailwind plugin?
A plugin is a function passed to plugins in the config. It receives helpers including addUtilities, addComponents, addBase, addVariant, matchUtilities and theme. ```js co...
Q7. How do ARIA live regions announce dynamic content?
Live regions announce content that changes without a page reload, such as form errors, toast messages, search result counts or a chat log. The aria-live attribute has val...
Q8. How do generics and constraints work in C#?
Generics let you write type-safe, reusable code without boxing or casts. The type parameter is resolved at compile time, and the JIT specialises for value types while sha...
Q9. How do you perform a variance analysis against budget?
Variance analysis compares actual results with the budget or forecast and explains the gap. I start by calculating the variance in absolute terms and as a percentage, the...
Q10. How do you build a custom widget that follows an ARIA authoring pattern?
When no native element supports the interaction, you implement an ARIA design pattern and must replicate all the expected behaviour. A custom combobox, for example, needs...