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C Institute | Questions


Previous Topic : Operator precedence and associativity - 1Next Topic : Operator precedence and associativity - 3

This section focuses on C interview questions, tricky questions, and puzzles, and viva questions based on “operator precedence and associativity”. One shall practice these questions and puzzles to improve their C programming skills needed for various interviews (campus interviews, walk-in interviews, viva exams and company interviews), placements, entrance exams and other competitive exams. These programming questions can be attempted by anyone focusing on learning C Programming language. They can be a beginner, fresher, engineering graduate, engineering student, bca student, mca student, mcs students or an experienced IT professional. It will improve their understanding of C Language. Here is a listing of C questions and puzzles on “operator precedence and associativity” along with answers and/or explanations.

Q1: What will be the output?
#include <stdio.h> 
int main() 
{   printf("%d", 1 << 2 + 3 << 4); 
    return 0; 
} 
a)  52
b)  512
c)  212
d)  0
Correct Answer : b
Explanation : The main logic behind the program is the precedence and associativity of the operators. The addition(+) operator has higher precedence than shift(<<) operator. So, the expression is solved as 1 << (2 + 3) << 4 which in turn reduces to (1 << 5) << 4 as the shift operator has left-to-right associativity.


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