Q1. What is the difference between a Docker image and a container?
An image is a read-only template; a container is a running instance of that image. - Image: built from a Dockerfile, composed of immutable layers, and stored in a registr...
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Q2. How do you improve Largest Contentful Paint?
LCP is dominated by four factors: time to first byte, resource load time, render-blocking resources and client-side rendering delay. First ensure fast TTFB with caching, ...
Q3. What is a multi-stage build and why use it?
A multi-stage build uses several FROM stages in one Dockerfile. You can compile in an early stage and copy only the artefacts into a minimal final stage. ```dockerfile FR...
Q4. How do you reduce Docker image size?
Attack the layers, base image, and build context. - Use a minimal base: alpine, distroless, or scratch for static binaries. - Use multi-stage builds: compile in one stage...
Q5. What is the Image component in Next.js?
A component that optimizes images for faster loading. ```jsx export default function Page() { return ( ); } ```
Q6. What is the next/image component used for?
The **`next/image`** component is an extension of the HTML `` element engineered to automatically optimize images for Core Web Vitals: ### Automatic Optimizations Perform...
Q7. How do you use placeholders with the next/image component?
Use `placeholder="blur"` with a `blurDataURL` or let Next.js generate it when importing static images. This shows a low-quality blurred preview while the image loads. ```...
Q8. Optimizing images in Next.js with the Pages Router?
By using the `next/image` component, which automatically optimizes images for performance. ```jsx import Image from "next/image"; export default function Home() { return ...