what are the advantages & disadvantages of unions?
- 2 Answers
- 37625 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / vishnu nayak
Union occupy same memory area for different members in a
union.
Same are is allocated for different data types of the
members of union
eg:
union
{
int a;
char c;
float f;
}temp;
Size of Float will be size of union.
same memory is used for char and int as well.
Advantages: Memory consumption is less.
Disadvanteges: if one of the member variable is updated the
it will be reflected in the remaining 2 variables.
| Is This Answer Correct ? | 62 Yes | 18 No |
Answer / vadivelt
Main disadvantage is, all the union member variables cannot
be initialised or used with different values at a time.
| Is This Answer Correct ? | 45 Yes | 14 No |
What is memcpy() function?
What's the difference between calloc() and malloc()?
What will the code below print when it is executed? int x = 3, y = 4; if (x = 4) y = 5; else y = 2; printf ("x=%d, y=%d ",x,y);
what is the output? #define fun(a,b,t) (g ##t=(a),(a)=(b),(b)=g##t) float gfloat; main() { float a=1.12,b=3.14; fun (a,b,float); printf("na=%4.2f,b=%4.2f",a,b); } A)Error in Defining Macro B)a=1.12,b=3.14 C)a=3.14,b=1.12 D)None of the Above
3 Answers Accenture, Infosys, Wipro,
What are the 32 keywords in c?
To print the pattern 1 2 3 4 5 10 17 18 19 6 15 24 25 20 7 14 23 22 21 8 13 12 11 10 9
main() { int a = 65; printf(“%d %o %x”,a,a,a); } Output 65 101 41 Please explain me.How it is coming like that?
Given an unsigned integer, find if the number is power of 2?
how many keywords do C compile?
7 Answers Microsoft, Practical Viva Questions,
write a method for an array in which it can display the largest n next largest value.
x=2,y=6,z=6 x=y==z; printf(%d",x)
13 Answers Bharat, Cisco, HCL, TCS,
main() { int a,b; printf("%d,%d",scanf("%d%d",&a,&b)); } => do u mean above program's output... =>output will be:2,whatever you enter value for b. =>because scanf is a library fn which will return how many arguements it processes, and second value you are right mr.Satya but i found my self unable to understand that for the first time scanf returns the no of successful matches but how for the second time it returns the value of 'b'.while a function should return the same 'r' value every time.
C 
