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Namrata
Namrata

Namrata

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Asked: 2021-06-23T20:43:20+05:30 In:

What Is A “null Pointer Assignment” Error? What Are Bus Errors, Memory Faults, And Core Dumps?

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What Is A “null Pointer Assignment” Error? What Are Bus Errors, Memory Faults, And Core Dumps?Is there any way to overcome these errors? if yes what are the ways and how can we do it?

and core dumps?bus errorscore dumps?memory faultsnull pointer assignmentwhat are bus errorswhat is "null pointer assignment" error?
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    1. Krishna Vijayan

      Krishna Vijayan

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      Here are the explanations to your query about Null Pointer Assignment Error, Bus Errors, Memory Faults And Core Dumps in C language:

      • Null Pointer Assignment Error: A NULL pointer assignment is a runtime error It occurs due to various reasons one is that your program has tried to access an illegal memory location. Illegal location means either the location is in the operating systems address space or in the other processes memory space. In stdio.h NULL is defined as 0 So whenever your program tries to access 0th location the operating system kills your program with runtime assignment error because the 0th location is in the operating systems address space and operating system doesn’t allow access to its address space by user program .
      • Bus Error: A bus error indicates an attempt to access memory in an illegal way, perhaps due to an unaligned pointer. A ‘bus error’ is certain undefined behavior result type. The cause for such error on a system could not be specified by the C language. The memory accessibility which CPU could not address physically, ‘bus error’ occurs. Also, any fault detected by a device by the computer system can also be a ‘bus error’. These errors caused by programs that generate undefined behavior which C language no longer specifies what can happen.
      • Core Dump/ Segmentation Fault: Core Dump/Segmentation fault is a specific kind of error caused by accessing memory that does not belong to you. When a piece of code tries to do read and write operation in a read only location in memory or freed block of memory, it is known as core dump. It is an error indicating memory corruption.

      Hope this answer helped. Also read, How to find factorial of a number in C

       

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