C Programming
What is the difference between a declaration and a definition of a variable?

A declaration occurs once, but a definition may occur many times.
Both can occur multiple times, but a definition must occur first.
Both can occur multiple times, but a declaration must occur first.
There is no difference between them.
A definition occurs once, but a declaration may occur many times.

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C Programming
What is function?

Function is the fundamental modular unit. A function is usually designed to perform a specific task.
Function is a block of code that performs a specific task. It has a name and it is reusable.
All of these
Function is a block of statements that perform some specific task.

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C Programming
What is the output of given program if user enter "xyz" ?#includevoid main(){float age, AgeInSeconds;printf("Enter your age:");scanf("%f", &age);AgeInSeconds = 365 * 24 * 60 * 60 * age;printf("You have lived for %f seconds", AgeInSeconds);}

Run time error
Enter your age: xyz "after that program will stop"
Enter your age: xyz You have lived for 0.00000 seconds
Enter your age: xyz You have lived for 0 seconds

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