Question

memory is active during runtime and is lost when the runtime off
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Answer 1

Memory leak occurs when programmers create a memory in heap and forget to delete it. Memory leaks are particularly serious issues for programs like daemons and servers which by definition never terminate. To avoid memory leaks, memory allocated on heap should always be freed when no longer needed.

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Answer 2

Answer:

In computer science, a memory leak is a type of resource leak that occurs when a computer program incorrectly manages memory allocations[1] in a way that memory which is no longer needed is not released. A memory leak may also happen when an object is stored in memory but cannot be accessed by the running code.[2] A memory leak has symptoms similar to a number of other problems and generally can only be diagnosed by a programmer with access to the programs' source code.

A space leak occurs when a computer program uses more memory than necessary. In contrast to memory leaks, where the leaked memory is never released, the memory consumed by a space leak is released, but later than expected. [3]

Because they can exhaust available system memory as an application runs, memory leaks are often the cause of or a contributing factor to software aging.