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Questions every good .NET developer should be able to answer? [closed]

...ference type? What does the "readonly" keyword in C# mean? I think it usually helps to ask your applicants to complete a simple coding exercise such as: Write your own linked list class without using the built-in classes. Write your own hashtable class without using the built-in classes. Write a...
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Programmatically trigger “select file” dialog box

...Note that I used visibility: hidden, instead of display: none. You cannot call the click event on a non-displayed file input. share | improve this answer | follow ...
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How to clean node_modules folder of packages that are not in package.json?

Assume I install project packages with npm install that looks into package.json for modules to be installed. After a while I see that I don't need some specific module and remove its dependency from package.json . Then I remove some other modules from package.json because they are not needed ...
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What is the difference between SQL, PL-SQL and T-SQL?

...e to operate on sets. It is more or less standardized, and used by almost all relational database management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc. PL/SQL is a proprietary procedural language used by Oracle PL/pgSQL is a procedural language used by PostgreSQL TSQL is a ...
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Why is “while ( !feof (file) )” always wrong?

...ol. The environment truly exists "concurrently" with your program. As with all things concurrent, questions about the "current state" don't make sense: There is no concept of "simultaneity" across concurrent events. Many properties of state simply don't exist concurrently. Let me make this more prec...
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What is an NP-complete in computer science?

...ng machine but also including a non-deterministic "choice" function). Basically, a solution has to be testable in poly time. If that's the case, and a known NP problem can be solved using the given problem with modified input (an NP problem can be reduced to the given problem) then the problem is NP...
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How to get a group of toggle buttons to act like radio buttons in WPF?

...'11 at 3:44 Uday Kiran ThummalapalliUday Kiran Thummalapalli 3,11922 gold badges1111 silver badges33 bronze badges ...
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How to get mouse position in jQuery without mouse-events?

... if (currentMousePos.x < 10) { // .... } }); But almost all code, other than setTimeout code and such, runs in response to an event, and most events provide the mouse position. So your code that needs to know where the mouse is probably already has access to that information... ...
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How to change the default encoding to UTF-8 for Apache?

...rey yes. if it's not already there, you can put it anywhere. however, i usually put every "custom" directive at the bottom of the file for a number of reasons (overriding pre-existing directives, order, and just to easily see what I did change from stock config). – MartinodF ...
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Purpose of Trigraph sequences in C++?

...er. It boils down to the fact that the ISO 646 character set doesn't have all the characters of the C syntax, so there are some systems with keyboards and displays that can't deal with the characters (though I imagine that these are quite rare nowadays). In general, you don't need to use them, but...