Declarations and Initializations Questions

• What is the output of the program #include<stdio.h> int main() { struct emp { char name[20]; int age; float sal; }; struct emp e = {"Tiger"}; printf("%d, %f\n", e.age, e.sal); return 0; }
• What will be the output of the program? #include<stdio.h> int main() { int X=40; { int X=20; printf("%d ", X); } printf("%d\n", X); return 0; }
• What is the output of the program? #include<stdio.h> int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i); return 0; }
• Which of the structure is incorrcet? 1 : struct aa { int a; float b; }; 2 : struct aa { int a; float b; struct aa var; }; 3 : struct aa { int a; float b; struct aa *var; };
• 1 : typedef long a; extern int a c; 2 : typedef long a; extern a int c; 3 : typedef long a; extern a c;
• Which of the following operations are INCORRECT?
• Which of the structure is correct? 1 : struct book { char name[10]; float price; int pages; }; 2 : struct aa { char name[10]; float price; int pages; } 3 : struct aa { char name[10]; float price; int pages; }
• Which of the declaration is correct?
• Which of the following correctly represents a long double constant?
• If the definition of the external variable occurs in the source file before its use in a particular function, then there is no need for an extern declaration in the function.
• Size of short integer and long integer would vary from one platform to another.
• Range of float id -2.25e+308 to 2.25e+308
• A long double can be used if range of a double is not enough to accommodate a real number.
• Range of double is -1.7e-38 to 1.7e+38 (in 16 bit platform - Turbo C under DOS)
• A float is 4 bytes wide, whereas a double is 8 bytes wide.
• Size of short integer and long integer can be verified using the sizeof() operator.