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What is issue in throwing an exception in a destructor?
If a destructor throws an exception, the instance is left in an invalid state. When an exception is thrown, the destructor automatically terminates at the point of the throw, unwinding the call stack until an exception handler is found (if one is provided). However, any resources yet to be released by the destructor, including all the instance's base classes, cannot be destroyed. When writing your own destructors, it is important to never throw an exception. If an exception could be thrown from within your destructor, you must catch it and handle it within the same destructor -- you must not rethrow the exception.
Who made the word debugging?
There is some controversy over the origin of the term "debugging." The terms "bug" and "debugging" are both popularly attributed to Admiral Grace Hopper in the 1940s[1]. While she was working on a Mark II Computer at Harvard University, her associates discovered a moth stuck in a relay and thereby impeding operation, whereupon she remarked that they were "debugging" the system. However the term "bug" in the meaning of technical error dates back at least to 1878 and Thomas Edison (see the Software bug article for a full discussion), and "debugging" seems to have been used as a term in aeronautics before entering the world of computers. Indeed, in an interview Grace Hopper remarked that she was not coining the term. The moth fit the already existing terminology, so she saved it. The Oxford English Dictionary entry for "debug" quotes the term "debugging" used in reference to airplane engine testing in a 1945 article in the Journal of the Royal Aeronautical Society, Hopper's bug was found 9 September 1947. The term was not adopted by computer programmers until the early 1950s. The seminal article by Gill [2] in 1951 is the earliest in-depth discussion of programming errors, but it does not use the term "bug" or "debugging". In the ACM's digital library, the term "debugging" is first used in three papers from 1952 ACM National Meetings.[3][4][5] Two of the three use the term in quotation marks. By 1963, "debugging" was a common enough term to be mentioned in passing without explanation on page 1 of the CTSS manual.[6] Kidwell's article Stalking the Elusive Computer Bug[7] discusses the etymology of "bug" and "debug" in greater detail
Who invented the term debugging?
The term "bug" in the meaning of technical error dates back at least to 1878 and Thomas Edison, and "debugging" seems to have been used as a term in aeronautics from 1945, in the context of repairing aircraft engines.It was not applied to computers until September 9, 1947 when a moth was found smashed in a relay of the Harvard Mark III electromechanical computer. Obviously this was (like all previous usage of the terms) a hardware problem, not a software problem (as the terms are now used).
Explain about exception handling with multiple exception?
Exception handling in Java is done through a try-catch-finally block. The "try" block of code is where you put the code which may throw an exception. The "catch" block of code is where you put the code which will execute after an exception is thrown in the try block. This is often used to display an error message, or to mitigate problems caused by the exception. The "finally" block is where you put code that you want to execute after the try and catch blocks have been processed. // example code for catching exception while reading from a file try { // this line of code can throw a FileNotFoundException FileReader in = new FileReader("myfile.txt"); // this line of code can throw an IOException in.read(); } catch(FileNotFoundException ex) { // catch first exception type System.err.println("Cannot find myfile.txt!"); } catch(IOException ex) { //catch second exception type System.err.println("Cannot read from myfile.txt!"); } finally { // no matter what we want to close the file, so do it here // however, this line can also cause an exception, so we need to catch that, too try { in.close(); catch(IOException ex) { // not much we can do about an exception that occurs here } }
Write a program to demonstrate the catching of all exceptions what happens when a raised exception is not caught by catch block in the absence of a catch all exception block?
If an exception is not caught then your program has undefined behaviour. Ultimately the program crashes, but since you haven't handled the exception you've no way of knowing what damage has been done. Files could be wiped or currupted, planes could fall from the sky... anything is possible with undefined behavour. The best way to deal with unknown exceptions is to first catch them with a catch-all. However, you cannot actually handle the exception unless you know what type of exception you are actually dealing with. Thus the normal course of action is to assume the worst, perform any and all necessary cleanup, log the exception as an unknown exception and rethrow. As the exception percolates back down the call stack, all other exception handlers should do the same: cleanup, log and rethrow. If you're lucky, another handler might recognise the exception and be able to provide more detailed information on the type of exception. Ultimately you must never allow a program to continue executing if you cannot handle an exception. C++11 offers a more elegant solution using a nested try catch within a catch-all. However, it makes more sense to place the nested try catch in a global function (e.g., handle_eptr()) which can specifically deal with all catch-all exceptions. Like so... #include <iostream> #include <string> #include <exception> #include <stdexcept> void handle_eptr(std::exception_ptr eptr) { try { if (eptr) std::rethrow_exception (eptr); } catch (const std::exception& e) { std::cerr << "Exception: "" << e.what() << ""\n"; } } int main() { try { std::string().at(1); // throws "invalid string position" } catch(...) // catch-all { // perform any necessary cleanup here before calling the global handler handle_eptr (std::current_exception()); } } Output: Exception: "invalid string position" Note that handle_eptr() receives a std::exception_ptr. By itself this is useless, but std::rethrow_exception() converts the eptr to a standard exception which can then be thrown, caught and logged. You must still perform any necessary cleanup and allow the program to terminate gracefully, but at least you now know what type of exception you are dealing with and can provide a specific handler to handle it. Note that handle_eptr() should be fleshed out to accept all necessary debug information such as the filename and the line number from the catch_all that called it. The example merely demonstrates how to pass the eptr and convert it into an actual exception.
What are computer debuggers?
Debuggers are software programs that are used to check other programs. One of their functions is to do a syntax check. For example, if a higher level language uses an "if else" statement and the programmer writes it as "if esle", which is a common error, the debugger would recognize the spelling error and "flag" (mark) the statement as being in error. That is a very simple error, however, there can be very complex errors that a human may not be able to discern.
How do you find out what vehicles are registered to someone?
The Department of Motor Vehicles keep records of who a car is registered to. However, this information is not available to the public.
What service can you use to find a Registered Agent?
There are plenty of service which you can use to find a Registered Agent. However, one of the most important one should find a Registered Agent is law stuffs.
When amway got registered in India?
Amway India was registered in 1995, however it didn't begin market operations in India until 1998
Can you pawn a gun in Tennessee that is not registered to me?
There is no such thing as a registered gun within the state of TN. Class III items are registered, but that is a federal thing. You can, however, pawn any gun in TN that you legally own.
How do you read a message to ather mobile number?
You can read a text message to any other mobile number. However, for this the other phone must be rooted and connected via USB Debugging.
Is Nike copyrighted?
The name Nike is not eligible for copyright protection. However it is registered as a trademark.
Is merton college oxford's crest copyright protected?
No. However it may be registered as a trademark.
Is the name cartooners copyright?
Names cannot be copyrighted. They can be registered as trademarks or servicemarks, however.
Is there a comma after LLC?
No, there usually is not a comma after LLC. However, it will depend on the business and how the company was registered.
How do you read a txt message to ather mobile number?
You can read a text message to any other mobile number. However, for this the other phone must be rooted and connected via USB Debugging.
Are Manchester United registered in the cayman islands?
In a reorganisation of the Manchester United group done in 2012, the ultimate parent entity of Manchester United was registered in the Cayman Islands for tax reasons. However, the football business is still registered in Manchester in the UK.
