SEO interviews test whether you can grow organic traffic from Google and AI search. These SEO interview questions cover how search engines work, keywords and on-page SEO for freshers, then technical SEO, Core Web Vitals, link building, content strategy, algorithm updates, audits and AI search for experienced SEO specialists.
30 questions · Updated
Fundamentals, definitions and simple scenarios. Good for freshers and warm-ups.
Search engine optimisation is improving a website so it ranks higher in unpaid search results.
Search engines crawl the web with bots that follow links, index the pages they find by understanding their content, and rank indexed pages for each query based on relevance, quality, authority and user experience.
SEO helps with all three stages.
On-page SEO covers content and HTML elements on the page, such as titles, headings and internal links.
Off-page SEO covers signals from outside the site, mainly backlinks, brand mentions and reviews.
Technical SEO makes sure search engines can crawl, render and index the site, covering speed, mobile-friendliness, sitemaps, structured data and site architecture.
Local SEO helps businesses appear in local and map results.
I start with seed topics from the business and customers, then use tools such as Google Keyword Planner, Ahrefs, Semrush and Google Search Console to find keywords with their search volume, difficulty and intent. I check the current results to understand what Google shows, prioritise keywords that match business goals and that we can realistically rank for, including long-tail keywords, and group them into topics for pages.
White hat SEO follows search engine guidelines: helpful content, good technical setup, a great user experience and earned links.
Black hat SEO tries to manipulate rankings with tactics such as keyword stuffing, hidden text, cloaking, buying links, private blog networks and scaled spammy content.
Black hat tactics can work briefly but risk penalties and loss of all organic traffic.
The title tag is a strong ranking signal and the headline in search results, so it should be unique, descriptive and around 50 to 60 characters.
The meta description does not affect rankings directly but influences clicks.
The robots meta tag controls indexing (noindex, nofollow).
The viewport tag supports mobile-friendliness.
The meta keywords tag is ignored by Google.
robots.txt is a file at the root of a site that tells crawlers which paths they may crawl, using User-agent, Disallow and Allow rules, and can list the sitemap location. It controls crawling, not indexing: a blocked page can still appear in results if linked elsewhere, so pages that must not be indexed need a noindex tag and must remain crawlable for it to be seen.
An XML sitemap lists the important URLs on a site, optionally with last modified dates, helping search engines discover pages, especially new, large or poorly linked sites.
It should include only canonical, indexable pages that return 200, be submitted in Google Search Console and referenced in robots.txt.
Large sites split sitemaps and use a sitemap index.
A canonical tag (rel="canonical") tells search engines which URL is the main version of a page when similar or duplicate content exists at several URLs, such as with tracking parameters, filters, printer versions or HTTP and HTTPS variants.
It consolidates ranking signals to the preferred URL.
Every indexable page should usually have a self-referencing canonical.
Informational (learning something, such as "what is GST"), navigational (finding a specific site, such as "Flipkart login"), commercial investigation (comparing options, such as "best laptops under 50000") and transactional (ready to act, such as "buy running shoes online"). Content must match the intent Google rewards for a query, which you can see by studying the current results.
Long-tail keywords are longer, more specific searches, such as "react interview questions for freshers" instead of "react".
Each has lower search volume but less competition and clearer intent, so they are easier to rank for and often convert better.
Together, long-tail searches make up most search traffic, which makes them ideal for new websites.
Search Console shows how Google sees your site before people arrive: search queries, impressions, clicks, average positions, indexing status, Core Web Vitals, links and manual actions.
Google Analytics shows what visitors do on the site: sessions, engagement, conversions and traffic sources.
SEO work uses both, and they can be linked.
Applied problems, trade-offs and questions about your own projects.
A unique, descriptive title tag that includes the main keyword, a compelling meta description, one clear H1 and logical subheadings, content that fully answers the searcher's intent and shows expertise, descriptive URLs, internal links with meaningful anchor text, optimised images with alt text, structured data, and a fast, mobile-friendly page.
Crawling is Google discovering and fetching a page; indexing is storing and understanding it so it can appear in results.
A page can be crawled but not indexed.
I use Google Search Console's page indexing report and URL Inspection to see why, then fix causes such as noindex tags, robots.txt blocks, canonical tags pointing elsewhere, duplicate or thin content, poor internal linking and missing sitemap entries, and request indexing.
Core Web Vitals are Google's user experience metrics: Largest Contentful Paint (LCP) measures loading, with a target under 2.5 seconds; Interaction to Next Paint (INP) measures responsiveness, under 200 milliseconds; and Cumulative Layout Shift (CLS) measures visual stability, under 0.1. They are part of the page experience signals, and are measured from real users in the Chrome UX Report.
Backlinks are links from other websites to yours, and Google treats quality links as votes of trust.
Good links come from relevant, authoritative sites.
I build them by creating linkable assets such as original research, tools and guides, digital PR, guest contributions on relevant publications, getting listed in quality directories and partner pages, and reclaiming unlinked brand mentions.
Buying links or link schemes breaks Google's guidelines and risks penalties.
Internal links help search engines discover pages, understand topics and pass authority, and help users navigate. Link from strong pages to important ones, use descriptive anchor text, connect related content in topic clusters, add breadcrumbs, fix orphan pages that have no internal links, and keep important pages within a few clicks of the home page.
E-E-A-T stands for Experience, Expertise, Authoritativeness and Trustworthiness, concepts from Google's search quality rater guidelines used to judge content quality, especially for "your money or your life" topics such as health and finance. Sites show it through author bios and credentials, first-hand experience, accurate sourcing, reviews, clear contact and business information, and a strong reputation.
Structured data, usually JSON-LD using schema.org types such as Article, Product, Organization, BreadcrumbList, LocalBusiness, Event and Recipe, describes page content to search engines.
It can make pages eligible for rich results such as star ratings, prices and breadcrumbs, which improve click-through rates.
It must match visible content and be tested with Google's Rich Results Test.
A topic cluster is a group of pages around one subject: a broad pillar page covers the main topic, and cluster pages cover subtopics in depth, all linked to each other.
For example, a guide to interview preparation linking to pages on React, SQL and HR questions.
This structure shows topical authority and helps both users and search engines navigate.
Duplicate content appears at several URLs, often through parameters, filters, pagination or copied text; fix it with canonical tags, redirects, consistent internal links and noindex where appropriate.
Thin content has little unique value, such as near-empty category pages or auto-generated pages; improve it, merge similar pages or remove them.
Too many low-value pages can drag down a whole site.
Local SEO helps businesses appear for nearby searches and in Google Maps. Key steps are a complete and verified Google Business Profile with the correct category, hours, photos and posts, consistent name, address and phone number (NAP) across directories, collecting and replying to reviews, location pages on the website and local backlinks such as from local news and associations.
Google mainly uses the mobile version of a page for indexing and ranking, so mobile pages must have the same content, structured data and metadata as desktop. For JavaScript-heavy sites, content that appears only after client-side rendering may be indexed late or missed; server-side rendering or static generation, real links with href attributes and checking the rendered HTML in Search Console avoid problems.
System design, deep internals, leadership and tough follow-ups.
I crawl the site with Screaming Frog or Sitebulb and review Search Console and analytics.
Then I check technical issues (indexing, status codes, redirects, canonicals, sitemaps, robots.txt, speed, mobile and structured data), on-page issues (titles, headings, duplicate and thin content, internal links), content quality and gaps against competitors, and the backlink profile.
I deliver a prioritised list of fixes by impact and effort.
I first check whether it is real: tracking problems, seasonality or a reporting change.
Then I compare the timing with Google algorithm updates, look at Search Console to see which pages, queries and countries lost clicks and impressions, and check for technical problems such as accidental noindex tags, robots.txt changes, redirects after a site migration, server errors or manual actions.
The pattern of losses usually points to the cause.
Google AI Overviews and AI Mode, ChatGPT search and Perplexity answer many questions directly, which reduces clicks for simple informational queries.
To stay visible I focus on content with original information, expertise and clear, quotable answers, structured data, strong brand authority and mentions across the web, and allow AI crawlers in robots.txt where it suits the business.
Measuring visibility now includes citations in AI answers, not just rankings.
Choose a URL structure, such as country domains (example.in), subdirectories (example.com/in/) or subdomains, with subdirectories usually easiest to manage. Use hreflang tags to tell Google which language and region each page targets, with return links and an x-default, translate and localise content properly rather than using raw machine translation, and avoid automatic redirects based on IP address.
Crawl the old site and record all URLs, rankings and traffic, map every old URL to its new equivalent with 301 redirects, keep content, titles and structured data where possible, test the new site on staging, update internal links, canonical tags and sitemaps, and launch at a quiet time. Afterwards monitor Search Console for errors, crawl the new site and fix missing redirects quickly.
Google releases several core updates a year that reassess content quality broadly, spam updates that target manipulative tactics such as scaled low-quality content, expired domain abuse and site reputation abuse, and the helpful content system has been merged into core ranking. When traffic drops after an update, compare affected pages with those now ranking, improve quality, depth and trust, and avoid quick fixes.
Server logs show exactly which URLs Googlebot requests, how often and with which status codes.
Analysing them reveals crawl budget waste on parameters, redirects, errors or low-value pages, and important pages that are rarely crawled.
Crawl budget matters mostly for large sites; improving speed, removing junk URLs, fixing redirects and strengthening internal links helps Google crawl what matters.
Programmatic SEO creates many pages from templates and data, such as pages for every city or product combination.
It can capture large amounts of long-tail traffic when each page offers genuinely unique, useful information.
If pages are near-duplicates or thin, Google may treat them as scaled content abuse, index few of them and lower trust in the whole site.
Quality checks and gradual rollout reduce the risk.
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