Mobile Software Engineer Interview Questions

392 mobile software engineer interview questions shared by candidates

Here's the one "bigger" question I was asked by the hiring manager on-site: Given an array of strings, e.g.: NSArray * files = @"[@"file2", @"folder22", @"folder10", @"file1", @"folder100", … … …, nil]; Describe how you would write some kind of method or function that would sort the strings in a predictable manner (e.g. "file1", "file2", "folder2", "folder10", "folder100" instead of "folder10", "folder100", "folder2")
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Mobile Software Engineer

Interviewed at Shutterstock

3.2
Apr 10, 2013

Here's the one "bigger" question I was asked by the hiring manager on-site: Given an array of strings, e.g.: NSArray * files = @"[@"file2", @"folder22", @"folder10", @"file1", @"folder100", … … …, nil]; Describe how you would write some kind of method or function that would sort the strings in a predictable manner (e.g. "file1", "file2", "folder2", "folder10", "folder100" instead of "folder10", "folder100", "folder2")

Design a Credit Card Parser that: 1) Will validate if a credit card is valid or not 2) Return the logo of the credit card (if valid) or return nil in case the credit card isn't valid. Dataset: User enters: 1111-1222-1112-1203 expiration date: 12/03. Valid Credit Card 2. Credit Cards: 2.1 Acme Credit Card: Starts with 1121 2.2 Alfa Credit Card: Starts with 1111 2.3 AmEx Credit Card: Starts with 3796
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Mobile Software Engineer

Interviewed at American Express

4.1
Feb 21, 2016

Design a Credit Card Parser that: 1) Will validate if a credit card is valid or not 2) Return the logo of the credit card (if valid) or return nil in case the credit card isn't valid. Dataset: User enters: 1111-1222-1112-1203 expiration date: 12/03. Valid Credit Card 2. Credit Cards: 2.1 Acme Credit Card: Starts with 1121 2.2 Alfa Credit Card: Starts with 1111 2.3 AmEx Credit Card: Starts with 3796

For the technical question, I was asked which third party frameworks I’ve used for doing ECommerce and how would I cause a JSON stream to be converted into a strongly typed object (e.g. not just an abstract Dictionary or Array containing “id” or “void” objects but an actual native object).
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Mobile Software Engineer

Interviewed at Sephora

3.6
Nov 12, 2016

For the technical question, I was asked which third party frameworks I’ve used for doing ECommerce and how would I cause a JSON stream to be converted into a strongly typed object (e.g. not just an abstract Dictionary or Array containing “id” or “void” objects but an actual native object).

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