iPhone Apps

Given below are some of the important interview questions on iPhone Apps Development prepared by experts. Checkout them if you are looking for a job in iPhone apps development.

Q.1 Give the features of iPhone 3gs?

There are various features in an iPhone 3g:
Video: Videos can be edited, shared. A high quality VGA video can be shot in landscape or portrait.
3 Mp Camera: Still photos with best quality can be taken.
Voice control: from recognizing names in the contact to recognizing music on iPod.
Compass: iPhone 3GS has built-in digital compass, which helps in pointing the directions.
Internet Tethering: web aquatics is done from anyplace. A 3G affiliation is shared on iPhone with mack notebook or laptop computer.

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Q.2 What is OS in an iPhone?

An OS runs on iPhone and iPod touch devices only.
Hardware devices are managed by iPhone OS, providing the technologies needed for implementing native applications on the phone.
The OS ships with several system applications.

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Q.3 What is iPhone SDK?

it is available with tools and interfaces that are needed for thriving, installing and running custom native applications.
Native applications are created using the iPhone OS’s system frameworks and Objective-C language and run directly on the iPhone OS.
Native applications are installed physically on a device and can run in the presence or absence of network connection.

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Q.4 What is iPhone architecture?

It is alike MacOS X architecture.
It acts as an intermediary between the iPhone and iPod hardware and the appearing applications on the screen.
The user created applications never correspond directly with the appropriate drivers, which protects the user applications from changes to the hardware.

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Q.5 What is iPhone reference library?

It is a set of reference documents for iPhone OS .
It can be downloaded by subscribing to the iPhone OS Library doc set.
Select Help> from Xcode Documentation, and click the subscribe button next to the iPhone OS Library doc set, which appears in the left column.

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Q.6 What are sensors in iPhone?

When the iPhone is lifted to ear the proximity sensor immediately turns off the display. This sensor helps saving power, and accidental dialing is prevented.
When the sunlight or bright rooms and dims in darker places the display is automatically brightens the iPhone by the ambient light sensor.

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Q.7 What are the location services?

For determining the approximate locations Applications such as compass, Maps and camera are allowed to use the information from cellular, Wi-Fi and Global Positioning System networks. The location is exhibited on the screen, using a blue marker.

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Q.8 State the functionality of accelerometer of an iPhone?

iPhone counters to motion by using a built-in accelerometer.
At the time of rotating iPhone from portrait to landscape, the accelerometer detects the movement and changes the display accordingly.

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Q.9 What applications are there that cab be used with an iPhone?

Technology, Entertainment and Design(TED): Allows to watch and listen to world’s most fascinating people have to say, all on the iPhone.
Market Watch: every update regarding investment market can be seen. Simply just click open the Stocks app and rotate.
Trends: Fashion news updates, latest runway shows, videos from Vogue’s fashion library, reviews, exclusive party pictures, can be seen on Style.com.

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Q.10 Give an introduction to iPhone application development?

Apple entered the cellular phone business, i the 2007 with the introduction of the iPhone, a multi-touch display cell phone, which also includes the features of iPod.

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Q.11 What is an iPhone app?

An iPhone app is a program that runs on our iPhone/iPod Touch devices only . It enables us to accomplish a certain task. They could be apps to access our bank account, utility apps, games, enterprise apps, entertainment apps, etc.
Some popular apps are:
Face book-Social networking
Doodle Buddy-drawing
Pandora Radio-radio on our iPhone
Yelp-restaurant reviews

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Q.12 What is the "client sign up" option?

The Client Sign Up feature (a free add-on) allows you to request your client’s email address and phone number when they launch your app. You can view the email addresses and phone numbers you’ve received via the online CMS system and download the results as an excel file for future reference.

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Q.13 What's the difference between a swebapps app and a mobile website?

SwebApps are installed on iOS and Android devices and run natively. Many of the functions available through our platform provide a better user experience than websites accessed via mobile browsers. Our SwebApps platform also relies on a content management system (CMS) that we’ve built and will maintain, leaving you without the technical hassle of maintaining your own mobile website.

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Q.14 What is the function of swebapps?

They allow you to create an iPhone and/or Android application online. And once your app is accessible for download via the iTunes Store or Android Market, you can update your content in real time i.e. at any time.

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Q.15 What is swebapps?

It is a simple, inexpensive way to build, track and update a native mobile application for your business or organization.

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Q.16 Can more than one merchant account with the same app be used?

No. the Credit Card Terminal can only be configured for a single merchant account.

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Q.17 Does the app library builder observes my personal files on my computer?

This tool checks only for apps on your computer; it does chase your personal information or submits it to appolicious. It only presents information about your apps and not the actual apps themselves.

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Q.18 Is appolicious owned by or in any way associated with apple inc.?

No.

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Q.19 What is appolicious?

Appolicious is the place to discover and share the latest and best iPhone, iPad, iPod Touch, and Android apps through social recommendations. Find, share, and review apps in categories such as Education, Games and Travel, or browse user-created lists of apps .

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Q.20 Can i install iPhone apps on an old ipod or a non iPhone/ipod touch?

No, they do not run on older iPods or Blackberries and Treos. Because the iPhone apps run on the iPhone or iPod Touch only, with 2.0 or higher installed.

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Q.21 Where are my app's settings?

On the iPhones home screen, the app's settings in the main "Settings" icon is stored by many apps. Click on the grey settings icon and scroll down the list of apps at the bottom of the settings page.
Then click on the app's name within settings to manage the settings for that app.

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Q.22 State the features of iPhone 3GS?

Some of the features of iPhone 3GS are -
1. High quality VGA video can be shot in portrait or landscape. Also videos can be edited, shared.
2. 3 Megapixel Camera with still photos can be shot with greater quality
3. Voice control that recognizes the names in contacts and recognizes the music on iPod.
4. iPhone 3GS has built-in digital compass, used to point the way.
5. Internet surfing can be done from anywhere. A 3G connection can be shared on iPhone with Mac notebook or laptop

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Q.23 What do you understand by iPhone OS?

Primarily iPhone OS runs on iPhone and iPod touch devices. All the hardware devices are being managed by iPhone OS and provides the technologies needed for implementing native applications on the phone. The operating system runs several system applications like Mail, Safari, Phone, which provide standard services to the user.

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Q.24 What Is iPhone SDK?

We can define iPhone SDK is a software development kit which is available with tools and interfaces required for developing, installing and running custom native applications. Here native applications are built using the iPhone OS’s system frameworks and Objective-C language that are run directly on iPhone OS. Such that native applications are installed physically on a device that can run in presence or absence of network connection.

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Q.25 How would you define iPhone Architecture?

iPhone Architecture is similar to MacOS X architecture. The iPhone Architecture acts as an intermediary between the iPhone and iPod hardware an the appearing applications on the screen. Since the user created applications never interact directly with the appropriate drivers, that protects the user applications from changes to the hardware.

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Q.26 What is the use of sensors in iPhone?

The proximity sensor in iPhone immediately turns off the display when the iPhone is lifted to ear. Also with the iPhone Sensor the power is also saved and accidental dialling is prevented. The sensor automatically commands the display to automatically brighten the iPhone display by the ambient light sensor when in sunlight or bright rooms and light automatically dims in darker places.

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Q.27 Describe the functionality of accelerometer of an iPhone?

iPhone responds to motion by using a built-in accelerometer. The accelerometer detects the movement and changes the display accordingly, at the time of rotating iPhone from portrait to landscape.

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Q.28 How do you define Appolicious?

Appolicious can be defined as the place to discover and share the latest and best iPhone, iPod Touch, iPad, and Android apps through social recommendations. For example - Find, share, and review apps in categories such as Games, Education, and Travel, or browse user-created lists of apps .

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Q.29 Can we install iPhone apps on old iPod or on a non-iPhone/iPod touch?

Since iPhone apps only run on the iPhone or iPod Touch with 2.0 or higher installed. Therefore they would not run on older iPods or BlackBerries and Treos.

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