debugging is checking for errors in a program usually semantics while testing is finding out whether the program performs the required task correctly:

Your Answer : The objective of debugging is to rectifying the error.

The objective of testing is to identifying the defect.

Big difference is that debugging is conducted by a programmer and the programmer fix the errors during debugging phase. Tester never fixes the errors, but rather find them and return to programmer.

debugging done in the devlopment phase by the devlopers.

testing is conducted by the testers in testing phase.

in devlopment phase devloper fixes the bug (i.e)called debugging

in testing phase tester will finds the bug (i.e)called testing to improve the quality of the product

Debugging is a process of line by line execution(White Box Testing) of the code/ script with the intent of finding errors/ fixing the defects. Testing is a process of finding the defects from a user perspective(Black Box Testing).

Debugging is the process of finding the bugs or defects in the system.
Testing is the process to ensure that the real objective of the system is met or not.

Testing is what the testers test an application and when some bugs found will report to the developers. Debugging is done by the developers, here they make some changes in the code in case of any error in the code.

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