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 C interview questions  C Interview Questions (2266)
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 Programming Languages AllOther interview questions  Programming Languages AllOther Interview Questions (652)
Question
What is the difference b/w Structure & Union?
 Question Submitted By :: C
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Memory allocated for any structure is equal to the sum of
memory required by each structure member.

Example: In a structure 'abc' below, memory allocated will
be 7 Bytes (2 Bytes for int a + 1 Byte for char b + 4 Bytes
for float c ina 32 bit processor)
struct abc
{
int a;
char b;
float c;
}

But in union memory allocated for it is equal to the memory
required by the biggest (in terms of memory it use) union
member.

Example: In a union 'abc' below, memory allocated will be 4
Bytes as float c is the biggest union member here and it
uses 4 Bytes of memory in 32 bit processor.

union abc
{
int a;
char b;
float c;
}
 
Is This Answer Correct ?    19 Yes 1 No
Nakul Sharma
 
Answer
# 2
in structure struct key word is used but in union union key
word is used.
 
Is This Answer Correct ?    6 Yes 9 No
Karthikkumareg
 
 
 
Answer
# 3
struct can hold multiple data types.
Like u can define a date structure....
but union can multiple data types which includes struct also

union x
{
int x;
struct
{
...
...
}
}
 
Is This Answer Correct ?    2 Yes 7 No
Raj Kumar
 

 
 
 
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how to set Nth bit of a variable?   1
In how much time you will write this c program? Prime nos from 1 to 1000 TCS 2
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what is the output of following question? void main() { int i=0,a[3]; a[i]=i++; printf("%d",a[i] }   3
What is the relation between # and include<stdio.h> HCL 5
WAP &#8211; represent a char in binary format Motorola 4
how to find binary of number?   2
When is an interface "good"?   1
 
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