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Er werd een Contract Ruby On Rails Software Engineer gevraagd...27 januari 2012

Describe a routine which returns the set of integers in {1..100} divisible without remainder by 3 but not by 9.

12 antwoorden

(1..100).select { |x| x%3 == 0 && x%9 != 0

1) start from number = 3 Loop while(number <= 100) 2) display number 3) number = number+3, display number 4) number = number+6 Loop Minder

put those integers into an array, pick every third element, out of which discard every third element. Minder

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This was a pair programming session with a Ruby engineer. They allow you to use your own laptop which was great but you only get 30 minutes to finish the problem with working unit tests. I think they re-use this pair programming problem so I'm not going to divulge details here. But it wasn't a particularly hard problem, they just want you to see how you code and test. Do not forget to write unit tests! Ideally you would develop it in a TDD fashion.

2 antwoorden

I wrote failing unit tests to determine the API first and then kept writing code until the tests succeeded. Minder

Do they expect use of rspec, minitest or just simple assert methods for tdd?

what is out put of: 1) a && b, 2) a ||= b, 3) a & b?

1 antwoorden

1) bigger value will be returned, 2) b is assigned to a if a is nil or false, 3) Boolean value will be returned based on the value of a and b(if any of a or b is nil or false false will be returned Minder


What type of data structure would you use to implement auto-complete functionality where memory usage needs to be minimized?

1 antwoorden

Use a trie


experiencias pasadas, conocimientos, prueba tecnica muy basica

1 antwoorden

di un resumen de mi experiencia y conocimiento, la prueba tecnica era mas que todo teorica en la que consultaban conceptos basicos de desarrollo. Minder

Sunflower Lab

They asked me that Do you know elastic search?

1 antwoorden

I answered , Elastic search is gem which is used to implement the search functionality. Minder


If we have 8 same little balls, but one of them is less weight. How may times do we need to weigh them to define which ball is less weight?

1 antwoorden

6 times


Prueba tenica mediate plataforma online y segunda prueba tecnica compartiendo pantalla

1 antwoorden

realizando los ejercicios solicitados

Icreon Communications

Have you created any gem of yours?

1 antwoorden



How would you optimize Ruby for performance?

1 antwoorden

What's the greatest challenge you've had working with other people?

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