Chapter 1. Get a Junior Developer

Question 1: What is a Struct in iOS?

Question 2: Explain what is a framework in iOS

Question 3: How can you store information within your iOS app?

Question 4: What is a Dictionary? Is it similar to other structures in other programming languages?

Question 5: What is a provisioning profile?

Question 6: What is ARC?

Question 7: What is an AutoLayout?

Question 8: How do you manage dependencies in iOS?

Question 9: How do you debug and profile on iOS?

Question 10: What is the difference between an "app id" and a "bundle id" in iOS?

Question 11: Explain how Code Signing Works?

Question 12: What is the difference between frame and bounds?

Question 13: How do you cast between types?

Question 14: Which method would you call to find an object type?

Question 15: What's the difference between #if and #ifdef?

Question 16: Tell us about iOS compilers

Question 17: How can you keep different flavours for production and development releases?

Question 18: What is the difference between viewDidLoad and viewDidAppear? Which one would you use to load data from a remote server and display it in the screen?

Question 19: How do you track bugs? What are your tools of choice?

Question 20: Explain NSUserDefaults

Question 21: How do you test your code? How do you make your code testable?

Question 22: What is the difference between atomic and nonatomic properties? Which is the default for synthesized properties? When would you use one vs. the other?

Question 23: What are "strong" and "weak" references? Why are they important and how can they be used to help control memory management and avoid memory leaks?

Question 24: Explain your process for tracing and fixing a memory leak.

Question 25: List six instruments that are part of the standard iOS set

Question 26: How do I add resources to my app?

Question 27: What are blocks?

Question 28: How do you insert a sanity check that will be disabled in release builds?

Question 29: When is let appropriate in Swift? var?

Question 30: What is a protocol, how do you define your own and when is it used?

Question 31: What is MVC? How is it implemented in iOS? Are there any alternatives to MVC?

Question 32: What are different ways that you can specify the layout of elements in a UIView?

Question 33: What format code is used to print a formatted message with NSString?

Chapter 2. That guy who has already been working with iOS for some time.&
About the Author: Enrique López Mañas is a Google Developer Expert and independent IT consultant. He has been working with mobile technologies since 2007. He is an avid contributor to the open source community and a FLOSS (Free Libre Open Source Software) enthusiast, and is among the top 10 open source Java contributors in Germany. He is a part of the Google LaunchPad accelerator, where he participates in Google global initiatives to influence hundreds of the best startups from all around the globe. He is also a big data and machine learning aficionado.
In his free time he rides his bike, take pictures, and travels until exhaustion. He also writes literature and enjoys all kinds of arts and likes to write about himself in third person. You can follow him on Twitter (@eenriquelopez) to stay updated on his latest movements.