C Programming
What will be the value of sum after the following program is executed?void main(){ int sum=1, index = 9; do{ index = index – 1; sum *= 2; }while( index > 9 );}

0.25
9
0.5
1
2

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C Programming
String concatenation means -

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

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