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@ -148,7 +148,7 @@ Bear in mind the main purpose of this quiz is for you to test your understanding
45. We know [HTTPS](https.md) is shit because it's [encrypted](encryption.md) and requires [certificates](certificate.md). Explain what these certificates are, why HTTPS needs them, how their absence could be "abused" and who issues them.
46. We have two barrels, one with water, one with wine, each having the same amount of liquid. We take a cup, fill it with water from the water barrel, pour it over to the wine barrel, mix it up, and then we fill the same cup with this mixture of water and wine from this barrel and pour it back to the water barrel. Both barrels now have the same amount of liquid again, but the liquids are mixed. What percentage of water is in the water barrel and what percentage of wine is in the wine barrel? Find a general formula for a cup of any size.
47. In context of programming languages explain the difference between *[lvalue](lvalue.md)* and *[rvalue](rvalue.md)* -- Where do they appear? What are they? How do they differ and what conditions are placed on each? Also place each of the following expressions under these categories (i.e. say which are lvalues, rvalues or both; details may depend on programming language, so just comment on that): `123`, `someVariable + 123`, `someArray[20]`, `*(somePointer + 4)`, `someVariable`.
48. Which start is the closest to [Earth](earth.md)?
48. Which star is the closest to [Earth](earth.md)?
49. A symmetric [relation](relation.md) is that for it hold that if A is in relation with B, then also B is in relation with A (for example "is married to"). Antisymmetric relation is that for which it holds that if A is in relation with B and A is distinct from B, then B is NOT in relation with A (for example "is parent of"). Give an example of relation that is both symmetric and antisymmetric.
50. Is [LGBT](lgbt.md) [good](good.md)?
51. Write a [C](c.md) function in 60 characters or fewer that takes a string (`char *`, consider zero terminated ASCII string) and replaces all semicolons in it with colons (`;` -> `:`). It can return nothing (`void`).