Top 100+ Application Security Interview Questions And Answers
Question 1. Describe The Last Program Or Script That You Wrote. What Problem Did It Solve?
All we need to see here is if the coloration drains from the man’s face. If he panics then we not only recognise he’s no longer a programmer (no longer necessarily horrific), however that he’s frightened of programming (awful). I realize it’s debatable, however I think that any excessive-stage protection man desires some programming abilties. They don’t want to be a God at it, but they need to recognize the standards and at the least be able to litter through some scripting while required.
Question 2. How Would You Implement A Secure Login Field On A High Traffic Website Where Performance Is A Consideration?
We’re looking for a fundamental expertise of the problem of trying to serve the the front page in HTTP, while wanting to give the login form through HTTPs, and how they’d advocate doing that. A key piece of the answer need to middle round avoidance of the MiTM chance posed by natural HTTP. Blank stares right here suggest that they’ve never seen or heard of this hassle, because of this they’re now not probably to be whatever close to pro degree.
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Question three. What Are The Various Ways To Handle Account Brute Forcing?
Look for discussion of account lockouts, IP regulations, fail2ban, and so forth.
Question four. What Is Cross-web page Request Forgery?
Not knowing this is greater forgivable than not understanding what XSS is, but handiest for junior positions. Desired solution: whilst an attacker receives a victim’s browser to make requests, preferably with their credentials covered, with out their understanding. A solid instance of this is whilst an IMG tag factors to a URL associated with an action.
Example: http://www.Wisdomjobs.Com/logout/. A victim simply loading that web page may want to doubtlessly get logged out from foo.Com, and their browser might have made the motion, now not them (due to the fact browsers load all IMG tags automatically).
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Question five. How Does One Defend Against Csrf?
Nonces required by the server for every page or every request is an frequent, albeit not foolproof, technique. Again, we’re looking for recognition and basic information right here–no longer a complete, professional level dissertation at the situation. Adjust expectancies in step with the placement you’re hiring for.
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Question 6. If You Were A Site Administrator Looking For Incoming Csrf Attacks, What Would You Look For?
This is a a laugh one, because it calls for them to set some ground guidelines. Desired answers are such things as, “Did we already implement nonces?”, or, “That depends on whether we already have controls in region…” Undesired solutions are such things as checking referrer headers, or wild panic.
Question 7. What’s The Difference Between Http And Html?
Obviously the answer is that one is the networking/application protocol and the opposite is the markup language, however once more, the primary issue you’re searching out is for him no longer to panic.
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Question eight. How Does Http Handle State?
It does no longer, of course. Not natively. Good answers are such things as “cookies”, however the pleasant answer is that cookies are a hack to make up for the fact that HTTP doesn’t do it itself.
Question nine. What Exactly Is Cross Site Scripting?
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Question 10. What’s The Difference Between Stored And Reflected Xss?
Stored is on a static page or pulled from a database and displayed to the person at once. Reflected comes from the consumer within the form of a request (usually built by an attacker), and then gets run within the sufferer’s browser whilst the outcomes are again from the site.
Question eleven. What Are The Common Defenses Against Xss?
Input Validation/Output Sanitization, with attention on the latter.