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Here big day comes for you. Either you have to attend a telephonic interview or face to face interview, things to manage makes you little stressful. To share this stress, we have completed the homework for you. You just have to take a quick tour to get sure shot success in your coming interview. These questions will not only help you in brushing up your skills, but makes you ready for your big day.
Let’s start with some of the basic questions that I hope you are already ready for. They might seem obvious, but you would be shocked how many engineers failed miserably at them during the 12 years I have been doing technical interviews.
IOS is a popular operating system compatible with cell phones, tablets, or smart-phones. Here we will discuss on popular interview questions that are divided into three sections further.
These sections are – IOS tester interview questions and answers, IOS interview questions and answers and the last section is IOS developer interview questions and answers. Let us discuss on each of the sections in detail further.
Answer: You can test the devices either on Emulator or you can test the apps on devices itself. An emulator is special software that helps you run apps on system successfully. In case, you use devices itself then there are chances of crashing, but these situations can be avoided in case of emulators.
Answer: Obviously, like any other devices, emulator also has certain pros and cons. Here, you will get a sure shot idea on emulators when to avoid them.
Answer: You should check first functional settings and configuration settings of the app. The other things
Answer: Yes, you can check the size of the screen on devices with an emulator.
Answer: The extension should be .ipa while testing different apps either on emulators or real devices.
Answer: In IOS development “ipa” stands for IOS app store package and “adb” stands for Android debug bridge.
Answer: The answer to the question depends on your work experience. Here, we have given the name of few mobile apps that are frequently used by IOS developers. These tools are Android, iPhone, Android Lint, Find bugs, Xcode, and Clang static analyzer etc.
Answer: There are three popular APIs to check the battery efficiency for apps. The name of the APIs is Location Tracking, Region Monitoring, and Visit events. Location tracking API will notify you about a location change at every 500 meters. The Region Monitoring API will notify you about region within a radius of 100 meters or more. Visit events API will notify about places when you enter or exit from a particular location.
Answer: A Category is an intelligent idea to add methods in class without extending it. The objective of the category is to add a large collection of methods that are related to each other.
Answer: The protocol is similar to Java interface defining a list of necessary methods that need to be implemented by a class. The protocol can be implemented by any of the classes or methods without knowing its type.
Answer: Synchronous calls wait until the task has completed while asynchronous calls complete task in the background and it notifies as soon as you completed.
Answer: B-tress provides hierarchal storage for key values with excellent characteristics and performance. In case of B-trees, each node contains some values of its own elements that are further connected to its children.
Answer: Enum is a special data type stores group of related values under one umbrella only.
Answer: The bounding box is a popular geometry term refers to the smallest within a given set of points.
Answer: The property @synthesize is used to create getter and setter methods for your program. This is easy to work with pre-defined properties once you are sure about their significance and the usage.
Answer: For this purpose, you should use @IBDesignable interface to check regular updates on your application. This has become an important functionality today demanded by most of the top organizations.
If you wanted to measure the value of unit tests that it can be done with the concept of Code Coverage.
Answer: There is only a minor difference between these two elements. Bounds are limited to their own coordinate system while a frame is related to super view it is contained within.
Answer: Responder Chain is a hierarchy of objects that quickly responds to the events received.
Answer: Regular expressions are the special type of string patterns that explain you how to look through the particular string.
Answer: Operator overloading allows us to change the behavior of existing methods and behavior accordingly as required for a particular program.
Answer: ABI plays a significant role when it comes to external libraries. This is a special program built to work with particular library and external libraries that is updated later. You don’t have to change the source code if you know how to use ABI for your application.
Answer: Design patterns are special templates that are designed based on application usage and requirements. The important part is that template code can be reused every time you work with the new application. Design patterns can be majorly defined into two categories – structural, creational, and behavioral.
Answer: The Singleton design pattern makes sure that there only a single instance exists for given class and it is necessary to give global access to that particular instance. For the first time, you may experience lazy loading during the creation of single instances.
Answer: The Façade design patterns are especially discovered for complex apps where you have to work with unique API only.
Answer: The Decorator design patterns add special responsibilities and behavior to the objects without making any changes to the source code. They can be used as an alternative to sub-class where it is possible to modify class when wrapped to another object.
Answer: This is an open source database framework that you can implement from scratch. This is highly convenient and fast to use.
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