IBM Interview Question: swap two numbers without using temporary variable | Glassdoor

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IBM Technical Consultant interview

IBM interview question

Technical Consultant Interview

swap two numbers without using temporary variable

Interview Answers

Anonymous

May 15, 2011

b=a+b; a=b-a; b=b-a;

Anonymous

May 30, 2011

Sagar's answer is decent, but there might be problems if they consider overflow. Better is using xor: b = a XOR b a = a XOR b b = a XOR b

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