Configuration and operations
Apache Interview Questions
Virtual hosts, MPMs, rewrites, proxying, TLS and performance tuning for Apache HTTP Server.
40 questions10 easy22 medium8 hard0/40 learned
01What is Apache HTTP Server and what is it used for?Easyapache · web server · http02How does Apache's request processing architecture work?Mediumapache · architecture · request handling03What are Apache MPMs and how do prefork, worker and event differ?Mediummpm · concurrency · apache04How is Apache installed and laid out on common Linux distributions?Easyinstallation · linux · filesystem05How is Apache configuration structured and loaded?Easyconfiguration · apache · directives06How do Apache virtual hosts work?Easyvirtual hosts · hosting · servername07How do Directory, Location and Files sections differ?Mediumdirectory · location · configuration08What is .htaccess and when should you avoid it?Mediumhtaccess · configuration · performance09How does mod_rewrite work at a high level?Mediummod_rewrite · rewrite · routing10How do you write correct and safe mod_rewrite rules?Hardmod_rewrite · regex · redirects11How do you configure Apache as a reverse proxy?Mediumreverse proxy · proxy · routing12Which mod_proxy modules and directives do you use most?Mediummod_proxy · proxy · modules13How does load balancing work with mod_proxy_balancer?Mediumload balancing · balancer · high availability14How do you configure TLS correctly in Apache?Mediumtls · ssl · certificates15How does Apache support HTTP/2 and what should you watch?Mediumhttp2 · protocol · performance16How do you enable and tune compression in Apache?Mediumcompression · deflate · performance17How does caching work in Apache and what should you cache?Hardcaching · mod_cache · performance18How do you configure authentication in Apache?Mediumauthentication · mod_authn · security19How do Require directives and authorization sections work?Mediumauthorization · require · access control20How do you restrict access by IP, host or network in Apache?Mediumaccess control · ip · security21How do you set and modify HTTP headers in Apache?Easyheaders · security headers · mod_headers22How do you handle CORS in Apache?Mediumcors · headers · browser security23How do Apache logs work and how do you manage them?Easylogging · error log · operations24How do you design a useful Apache LogFormat?Mediumlog format · observability · logging25How do you debug a failing Apache deployment?Mediumdebugging · troubleshooting · operations26How do you approach Apache performance tuning?Hardperformance · tuning · capacity27How do you tune Apache MPM directives safely?Hardmpm · tuning · capacity planning28How does keep-alive work and how should you tune it?Easykeep-alive · connections · performance29Which Apache timeouts matter and how do you set them?Mediumtimeouts · reliability · proxy30How do you harden an Apache server?Hardsecurity · hardening · operations31How do you run PHP with Apache?Mediumphp · php-fpm · apache32How do you run Apache well in Docker?Mediumdocker · containers · apache33How do you design health checks for an Apache service?Mediumhealth checks · reliability · operations34What is a graceful restart and when should you use it?Easygraceful restart · reload · operations35How does Apache compare with nginx?Easynginx · comparison · architecture36How do you serve static files efficiently with Apache?Easystatic files · performance · caching37How do Apache modules work and how do you manage them?Mediummodules · loadmodule · operations38How do CGI and FastCGI work in Apache?Hardcgi · fastcgi · process management39What are common Apache configuration mistakes?Hardmistakes · configuration · operations40What are Apache best practices for production?Hardbest practices · production · operations
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