ELEVATE SKILLS!
Q: 1 To create synonym for data type use ___________.
Reference variable
typedef
synonym
alias
[ Option B ]
In C/C++, sometimes data types have long or complex names, which makes code harder to read. To solve this, we can create a new name (synonym) for an existing data type. The keyword typedef is used to define a new name for an existing data type.
E.g.:
typedef unsigned int uint;
uint a=10;
Q: 2 Output of the linked list node access in the following code:
struct node
{
int data;
struct node* next;
};
int main()
{
struct node n1 = {10,NULL};
struct node n2 = {20,NULL};
n1.next = &n2;
printf(“%d”, n1.data+n1.next->data);
}
10
20
NULL
30
[ Option D ]
In this program, n1 is initialized with data 10 and n2 with data 20. Then n1.next is set to point to n2. In the printf statement, n1.data gives 10 and n1.next->data accesses the data of n2, which is 20. Their sum is 30, so the output is 30.
Q: 3 What will be the output of the following code?
#include<stdio.h>
struct info
{
int x;
};
int main()
{
struct info a = {10};
struct info b = a;
b.x = 20;
printf(“%d %d”, a.x,b.x);
return 0;
}
10 10
20 20
10 20
20 10
[ Option C ]
As we know, structure variables in C are copied by value, not by reference. When struct info b = a; is executed, the value of a.x (10) is copied into b.x. Later, changing b.x = 20 does not affect a.x, which remains 10. Therefore, the output of the program is 10 20.
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