Question

Which is better in terms of performance for iterating an array? (a) for(int i=0; i<100; i++) (b) for(int i=99; i>=0; i–) (c) for(int i=100; i<0; i++) (d) for(int i=99; i>0; i++) I had been asked this question in a job interview. Origin of the question is Coding best practices topic in section Autoboxing & Miscellaneous of Java Select the correct answer from above options

Answer 1

Correct option is (b) for(int i=99; i>=0; i–) The best I can explain: reverse traversal of array take half number cycles as compared to forward traversal. The other for loops will go in infinite loop.