IOS Engineer Interview Questions | Glassdoor

IOS Engineer Interview Questions

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IOS engineer interview questions shared by candidates

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What are the App states. Explain them?

1 Answer

Active: app is foreground Background: app is not foreground but still executing codes Inactive: app is suspended

If you have a program that runs slow, how will you improve it to run faster?

6 Answers

One question 3 of the interviewers asked me was "What was the most difficult thing you had to deal with.".

6 Answers

Write a function that determines which function is a mirror number. i.e. 12321 would return YES

5 Answers

How would you copy a custom object like a "Node" from a search tree in Objective C?

3 Answers

Emphasis on algorithms and complexity analysis and some higher-level design. Process is perhaps more focussed on discussion of alternatives/trade-offs/complexity over necessarily nailing a "perfect" answer in the provided time.

2 Answers

The questions weren't too technical or difficult, but I was thrown by the vagueness of "Tell me about memory management."

1 Answer

How could you cancel a block in the operation queue after it has been dispatched?

3 Answers

How will you implement sets and the intersection operation? Complexity?

1 Answer

I was asked to create an app that would download ten predetermined photos and display them in a UITableViewController.

1 Answer
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