C programming code to find hcf and lcm
#include <stdio.h>

int main() {
int a, b, x, y, t, gcd, lcm;

printf("Enter two integers\n");
scanf("%d%d", &x, &y);

a = x;
b = y;

while (b != 0) {
t = b;
b = a % b;
a = t;
}

gcd = a;
lcm = (x*y)/gcd;

printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

return 0;
}

C program to find hcf and lcm using recursion
#include <stdio.h>

long gcd(long, long);

int main() {
long x, y, hcf, lcm;

printf("Enter two integers\n");
scanf("%ld%ld", &x, &y);

hcf = gcd(x, y);
lcm = (x*y)/hcf;

printf("Greatest common divisor of %ld and %ld = %ld\n", x, y, hcf);
printf("Least common multiple of %ld and %ld = %ld\n", x, y, lcm);

return 0;
}

long gcd(long a, long b) {
if (b == 0) {
return a;
}
else {
return gcd(b, a % b);
}
}

C program to find hcf and lcm using function
#include <stdio.h>

long gcd(long, long);

int main() {
long x, y, hcf, lcm;

printf("Enter two integers\n");
scanf("%ld%ld", &x, &y);

hcf = gcd(x, y);
lcm = (x*y)/hcf;

printf("Greatest common divisor of %ld and %ld = %ld\n", x, y, hcf);
printf("Least common multiple of %ld and %ld = %ld\n", x, y, lcm);

return 0;
}

long gcd(long x, long y) {
if (x == 0) {
return y;
}

while (y != 0) {
if (x > y) {
x = x - y;
}
else {
y = y - x;
}
}

return x;
}

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Const char *p , char const *p What is the difference between the above two?

1) const char *p - Pointer to a Constant char ('p' isn't modifiable but the pointer is)
2) char const *p - Also pointer to a constant Char

However if you had something like:
char * const p - This declares 'p' to be a constant pointer to an char. (Char p is modifiable but the pointer isn't)



TCS TECHNICAL INTERVIEW QUESTIONS:

Write a program to find factorial of a number using recursive function.
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• What are different errors encountered while complying?
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• What happens if an array goes out-of-bounds?
• What is the role of C++ shorthand’s?
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• Describe friend function & its advantages.

• Differentiate between null and void pointers.
• Write a program to add three numbers in C++ utilizing classes.
• Devise a program that inputs a 3 digit number n and finds out whether the number is prime or not. Find out its factors.
• Explain debugger.
• What are the different types of sorting? Explain the difference between them.
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