C Programming
What is the right choice, if the following loop is implemented?void main(){ int num = 0; do{ --num; printf("%d", num); }while( ++num >= 0 );}

There will be a compilation error reported.
The loop will run infinitely many times.
A run time error will be generated.
Prints the value of 0 one time only.
The program will not enter into the loop.

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C Programming
String concatenation means -

Combining two strings.
Merging two strings.
Partitioning the string into two strings.
Comparing the two strings to define the larger one.
Extracting a substring out of a string.

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