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Questions every good .NET developer should be able to answer? [closed]
My company is about to hire .NET developers . We work on a variety of .NET platforms: ASP.NET, Compact Framework, Windowsforms, Web Services. I'd like to compile a list/catalog of good questions, a kind of minimum standard to see if the applicants are m>ex m>perienced. So, my question is:
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Why are const parameters not allowed in C#?
... actually will not mutate it. Similarly, the callee cannot assume that the contents of the object will not change throughout the action of the callee; the callee could call some mutating method on a non const alias of the const object, and now the so-called const object has changed.
C-style const p...
Coding Practices which enable the compiler/optimizer to make a faster program
...rn as well. An inefficient function or method has fewer statements in its content than the combined overhead. These are good candidates for inlining, whether it be as #define macros or inline functions. (Yes, I know inline is only a suggestion, but in this case I consider it as a reminder to the c...
Why is “while ( !feof (file) )” always wrong?
...I'd like to provide an abstract, high-level perspective.
Concurrency and simultaneity
I/O operations interact with the environment. The environment is not part of your program, and not under your control. The environment truly m>ex m>ists "concurrently" with your program. As with all things concurrent, q...
REST authentication and m>ex m>posing the API key
...at partners can only use on domains that they have registered with us. Its content is partly public (but preferably only to be shown on the domains we know), but is mostly private to our users. So:
To determine what is shown, our user must be logged in with us, but this is handled separately.
To ...
Multithreading: What is the point of more threads than cores?
... up spending more time changing the active threads than you do running the contents of the threads themselves.) Also, one of the reasons the logic above is so simple is that I've very deliberately chosen a simplistic (and unrealistic) m>ex m>ample. If you wanted to echo what was typed to the screen the...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...mount of compression. Depending on the type of image and the actual image contents, a large image may compress to a small file. The compression factor can be particularly significant with graphics (as opposed to photographs).
4. Preferred Image Format
What is the best image format to use for imag...
Is Java “pass-by-reference” or “pass-by-value”?
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The changeName function above will never be able to modify the actual content (the bit values) of the passed reference. In other word changeName cannot make Person person refer to another Object.
Of course you can cut it short and just say that Java is pass-by-value!
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Image comparison - fast algorithm
I'm looking to create a base table of images and then compare any new images against that to determine if the new image is an m>ex m>act (or close) duplicate of the base.
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“is” operator behaves unm>ex m>pectedly with integers
...g 257. You can see this if you do the compilation yourself and m>ex m>amine its contents:
>>> codeObj = compile("257 is 257", "blah!", "m>ex m>ec")
>>> codeObj.co_consts
(257, None)
When CPython does the operation, it's now just going to load the m>ex m>act same object:
>>> import di...