Consider the following C code:Q.The code suffers from which one of the following problems:a)compiler error as the return of malloc is not typecast appropriately.b)compiler error because the comparison should be made as x==NULL and not as shown.c)compiles successfully but execution may result in dangling pointer.d)compiles successfully but execution may result in memory leakCorrect answer is option 'D'. Can you explain this answer? - EduRev Computer Science Engineering (CSE) Question

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Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Consider the following C code:Q.The code suff...

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Consider the following C code:

Q. The code suffers from which one of the following problems:

a)
compiler error as the return of malloc is not typecast appropriately.
b)
compiler error because the comparison should be made as x==NULL and not as shown.
c)
compiles successfully but execution may result in dangling pointer.
d)
compiles successfully but execution may result in memory leak

Correct answer is option 'D'. Can you explain this answer?

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Consider the following C code:Q.The code suffers from which one of the...

Explanation:

The code will run and give output = 10, so option A and B are discarded.

int * x= malloc (sizeof(int));

This statement assigns a location to x. Now,

(int*)malloc(sizeof(int));

again assigns a new location to x , previous memory location is lost because now we have no reference to that location resulting in memory leak. Therefore, option D is correct. 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. Detailed article on Memory Leak Running code of the question: [sourcecode language="C"] #include int *assignval (int *x, int val) { *x = val; return x; } void main () { int *x = malloc(sizeof(int)); if (NULL == x) return; x = assignval (x,0); if (x) { x = (int *)malloc(sizeof(int)); if (NULL == x) return; x = assignval (x,10); } printf("%d\n", *x); free(x); } [/sourcecode]

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Consider the following C code:Q.The code suffers from which one of the following problems:a)compiler error as the return of malloc is not typecast appropriately.b)compiler error because the comparison should be made as x==NULL and not as shown.c)compiles successfully but execution may result in dangling pointer.d)compiles successfully but execution may result in memory leakCorrect answer is option 'D'. Can you explain this answer?

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Consider the following C code:Q.The code suffers from which one of the following problems:a)compiler error as the return of malloc is not typecast appropriately.b)compiler error because the comparison should be made as x==NULL and not as shown.c)compiles successfully but execution may result in dangling pointer.d)compiles successfully but execution may result in memory leakCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the following C code:Q.The code suffers from which one of the following problems:a)compiler error as the return of malloc is not typecast appropriately.b)compiler error because the comparison should be made as x==NULL and not as shown.c)compiles successfully but execution may result in dangling pointer.d)compiles successfully but execution may result in memory leakCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following C code:Q.The code suffers from which one of the following problems:a)compiler error as the return of malloc is not typecast appropriately.b)compiler error because the comparison should be made as x==NULL and not as shown.c)compiles successfully but execution may result in dangling pointer.d)compiles successfully but execution may result in memory leakCorrect answer is option 'D'. Can you explain this answer?.

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