Interview Questions.

Question 1. What Is Latest Xcode Version?

Answer :

The present day Xcode version is Xcode- four.6.2

Question 2. What Is Latest Mac Os Version?

Answer :

The modern Mac os is  Mac- Mountain Lion

C Interview Questions
Question 3. What Is Ipad Screen Size?

Answer :

The ipad screen size is 1024X768

Question four. What Are The Features Is Ios6?

Answer :

1. Map :superbly designed from the ground up (and the sky down)
2. Integration of Facebook with iOS
3. Shared photograph streams.
4. Passbook – boarding passes, loyalty playing cards, retail coupons, cinema tickets and greater multi functional place.
5. Facetime – on cellular community as wifi.
6. Changed Phone app – *strike a cord in me later,*respond with message.
7. Mail – redesigned extra streamline interface.
8. Camera with landscape .

C Tutorial
Question five. Who Invented Objective C?

Answer :

Objective c is invented by using Broad cox and Tom Love

IPHONE APPS Interview Questions
Question 6. What Is Cocoa And Cocoa Touch?

Answer :

Cocoa is for Mac App improvement  and cocoa contact is for apples touch gadgets – that offer all improvement surroundings.

Question 7. What Is Property In Objective C?

Answer :

Property allow declared variables with specification like atomic/nonatomic, or preserve/assign.

IPHONE APPS Tutorial Android Interview Questions
Question eight. What Is Meaning Of "copy" Keyword?

Answer :

copy item for the duration of venture and will increase hold rely via 1

Question nine. What Is Meaning Of "preserve" Keyword?

Answer :

Specifies that hold have to be invoked on the object upon project. Takes possession of an item.

Mobile Testing Interview Questions
Question 10. What Is The Meaning Of "assign" Keyword?

Answer :

Specifies that the setter makes use of easy project. Uses on characteristic of scalar kind like flow,int.

Android Tutorial
Question 11. What Is The Meaning Of "atomic" Keyword?

Answer :

“atomic”, the synthesized setter/getter will make certain that a whole fee is always again from the getter or set by means of the setter, only single thread can get entry to variable to get or set cost at a time.

Java Native Interface (JNI) Interview Questions
Question 12. What Is The Meaning Of "nonatomic" Keyword?

Answer :

In non atomic no such guarantee that price is back from variable is identical that setter units at same time.

C Interview Questions
Question 13. Define Fast Enumeration?

Answer :

Fast enumeration is a language feature that permits you to enumerate over the contents of a collection. (Your code will also run quicker due to the fact the inner implementation reduces message send overhead and increases pipe lining capacity.)

Mobile Testing Tutorial
Question 14. What Is The Meaning Of "synthesize" Keyword?

Answer :

In this keyword specifies the ask the compiler to generate the setter and getter  strategies in step with the specification in the announcement.

Question 15. What Is "protocol" On Objective C?

Answer :

A protocol declares techniques that may be applied through any magnificence. Protocols are not classes themselves. They sincerely define an interface that other gadgets are answerable for imposing. Protocols have many blessings. The concept is to provide a manner for training to proportion the identical approach and belongings declarations without inheriting them from a common ancestor.

JNDI (Java Naming and Directory Interface) Interview Questions
Question sixteen. What Is Use Of Uiapplication Class?

Answer :

The UIApplication magnificence implements the specified conduct of an application.

Mobile computing Tutorial
Question 17. What Type Of Compilers Apple Using?

Answer :

The Apple compilers are used  based on the compilers of the GNU Compiler Collection.

Mobile computing Interview Questions
Question 18. What Is Synchronized() Block In Objective C? What Is The Use Of That?

Answer :

The @synchronized()directive locks a phase of code for use by way of a unmarried thread. Other threads are blocked until the thread exits the blanketed code.

IPHONE APPS Interview Questions
Question 19. What Is The Use Of "dynamic" Keyword?

Answer :

Instructs the compiler now not to generate a caution if it can not find implementations of accessor techniques associated with the properties whose names comply with.

Mobile Security Tutorial
Question 20. Define App Bundle?

Answer :

When you construct your iOS app, Xcode packages it as a package deal. A package is a listing inside the file machine that agencies related assets together in one location. An iOS app package contains the app executable record and assisting aid files including app icons, photo files, and localized content material.

JQuery Mobile Interview Questions
Question 21. Name The Application Thread From Where Uikit Classes Should Be Used?

Answer :

UIKIT classes should be used simplest from an application’s foremost thread. 
Note: The derived classes of UIResponder and the training which manage software’s user interface must be used from application’s primary thread.

Question 22. What Is The Main Difference Between Nsarray And Nsmutablearray ?

Answer :

NSArray?s contents can not be modified once it?s been created whereas a NSMutable Array can be changed as wanted, i.E items may be delivered/eliminated from it.

Objective C Tutorial
Question 23. Explain Retain Counts?

Answer :

Retain counts are the way wherein reminiscence is controlled in Objective-C. When you create an object, it has a maintain count of one. When you send an item a keep message, its keep remember is incremented with the aid of 1. When you send an item a launch message, its maintain matter is decremented via 1. When you ship an object a vehicle release message, its hold count number is decremented by 1 at some stage within the destiny. If an object?s maintain count number is reduced to zero, it is deallocated.

Mobile Security Interview Questions
Question 24. What Is The Main Difference Between Frame And Bounds?

Answer :

The body of a view is the rectangle, expressed as a place (x,y) and size (width,peak) relative to the brilliant view it's miles contained within. The bounds of a view is the rectangle, expressed as a vicinity (x,y) and size (width,top) relative to its very own coordinate machine (0,0).

Android Interview Questions
Question 25. What Is Outline The Class Hierarchy For A Uibutton Until Nsobject ?

Answer :

UIButton inherits from UIControl
UIControl inherits from UIView
UIView inherits from UIResponder
UIResponder inherits from the root magnificence NSObject.
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Question 26. What Are The App States. Explain Them?

Answer :

Not going for walks State:  The app has not been released or was going for walks however become terminated by the system.

Inactive state: The app is jogging within the foreground but is currently no longer receiving events. (It may be executing other code though.) An app typically remains on this country best briefly as it transitions to a exceptional kingdom. The most effective time it stays inactive for any time period is whilst the consumer locks the display screen or the gadget activates the consumer to reply to some occasion, inclusive of an incoming smartphone call or SMS message.

Active state: The app is jogging within the foreground and is receiving occasions. This is the regular mode for foreground apps.

Background state:  The app is within the history and executing code. Most apps input this nation in brief on their manner to being suspended. However, an app that requests extra execution time may additionally remain in this state for a time frame. In addition, an app being released directly into the background enters this state instead of the inactive state. For information approximately a way to execute code even as in the history, see “Background Execution and Multitasking.”

Suspended country:The app is within the background however isn't executing code. The gadget moves apps to this country automatically and does now not notify them before doing so. While suspended, an app remains in memory but does now not execute any code. When a low-reminiscence situation occurs, the device might also purge suspended apps without word to make more area for the foreground app.

Objective C Interview Questions
Question 27. Define Code Signing?

Answer :

Signing an application allows the machine to perceive who signed the software and to verify that the utility has no longer been modified since it changed into signed. Signing is a requirement for submitting to the App Store (each for iOS and Mac apps). OS X and iOS verify the signature of applications downloaded from the App Store to ensure that they they do no longer run applications with invalid signatures. This lets users accept as true with that the application turned into signed by means of an Apple source and has n’t been modified because it changed into signed.

Mobile Testing Interview Questions
Question 28. What Is Iphone?

Answer :

iPhone is a combination of internet and multimedia enabled smart telephone developed by means of Apple Inc. IPhone functions as a digital camera cellphone, including text messaging, and visible voice mail. IPhone is a portable media player that resembles a video iPod It has user interface this is constructed across the multi-contact display screen which includes digital keyboard.

Question 29. What Is An Iphone App?

Answer :

An iPhone app is a application that runs on our iPhone/iPod Touch. It enables us to perform a certain project. They will be software apps, games, business enterprise apps, enjoyment apps, apps to access our financial institution account and so forth.

Mobile Developer Interview Questions
Question 30. What Is The Introduction To Iphone Application Development?

Answer :

In 2007, Apple entered the cellular telephone enterprise with the introduction of the iPhone, a multi-contact show mobile telephone, which additionally consists of the capabilities of iPod.

Question 31. Multitasking Support Is Available From Which Version?

Answer :

iOS 4.Zero version is supports multitasking.

Question 32. Explain The Difference Between Nsoperation Queue Concurrent And Non-concurrent?

Answer :

In the context of an NSOperation object, which runs in an NSOperation Queue, the terms concurrent and non-concurrent do now not necessarily talk to the side-by way of-facet execution of threads. Instead, a non-concurrent operation is one which executes the usage of the surroundings that is furnished for it while a concurrent operation is chargeable for putting in place its very own execution surroundings.

Mobile Application Testing Interview Questions
Question 33. What Are The Features Of Iphone 3gs?

Answer :

Video: Videos may be edited, shared. High pleasant VGA video can be shot in portrait or panorama.
3 Mega pixel Camera: Still photos with extra nice can be taken.
Voice manipulate: It recognizes the names in contacts and recognizes the track on iPod.
Compass: iPhone 3GS has integrated virtual compass, used to factor the way.
Internet Tethering: Internet surfing can be achieved from anywhere. A 3G connection may be shared on iphone3 with Mac pocket book or laptop.

Java Native Interface (JNI) Interview Questions
Question 34. Why Iphone Apps Are Popular?

Answer :

Give our commercial enterprise a whole new manner of transacting commercial enterprise for millions of users. IPhones are the market leaders within the smart telephone section. The iPhone has grow to be a outstanding device to surf the net, play games, interact with social networks and transact business.

Question 35. Where Can You Test Apple Iphone Apps If You Don’t Have The Device?

Answer :

iOS Simulator may be used to test cell packages. Xcode device that comes along with iOS SDK includes Xcode IDE in addition to the iOS Simulator. Xcode additionally consists of all required equipment and frameworks for building iOS apps.  However, it's far strongly endorsed to check the app on the real tool before publishing it.

Question 36. Does Ios Support Multitasking?

Answer :

iOS 4 and above helps multitasking and lets in apps to remain within the historical past until they're launched once more or till they're terminated.

JNDI (Java Naming and Directory Interface) Interview Questions
Question 37. What Is The Nscoder Class Used For?

Answer :

NSCoder is an abstract Class which represents a move of statistics. They are used in Archiving and Unarchiving gadgets. NS Coder items are typically utilized in a technique that is being implemented so that the elegance conforms to the protocol. (which has some thing like encode Object and decode Object strategies in them).

Question 38. What Is Iphone Os?

Answer :

iPhone OS runs on iPhone and iPod touch gadgets.
Hardware gadgets are controlled with the aid of iPhone OS and provides the technology wished for imposing native packages at the cellphone.
The OS ships with several system programs consisting of Mail, Safari, Phone, which offer wellknown offerings to the user.
Question 39. What Is The Difference Between Shallow Copy And Deep Copy?

Answer :

Shallow copy is also called address copy. In this manner you simplest copy address not real information while in deep copy you reproduction records.
Suppose there are two objects A and B. A is pointing to a different array even as B is pointing to exceptional array. Now what I will do is following to do shallow replica.?Char *A = ‘a’,’b’,’c’;?Char *B = ‘x’,’y’,’z’;?B = A;?Now B is pointing is at identical area wherein A pointer is pointing.Both A and B in this case sharing identical facts. If change is made both gets altered price of records.Advantage is that coping technique is very rapid and is unbiased of size of array.
While in deep copy information is also copied. This procedure is slow but Both A and B have their personal copies and modifications made to any reproduction, different will reproduction will not be affected.

Question forty. What Are The Requirements For Developing Iphone Apps?

Answer :

Mac OS 10.5/10.6 iPhone SDK (Software Development Kit 3.0/four.Zero).

IPhone SDK includes:

a. IDE to develop iPhone Apps is XCode(This tool is inbuilt in iPhone SDK)
b. Interface Builder This is used to design GUI of Apps(Inbuilt function of iPhone SDK)
c. Instruments  This is used to check any reminiscence leaks in our apps (Inbuilt in SDK)
d. Simulator This is used to test our apps earlier than deploying into actual tool.

Mobile computing Interview Questions
Question forty one. What Are The Popular Apps Of Iphone?

Answer :

iphone apps are

a. Facebook-Social networking
b. Doodle Buddy-drawing
c. Pandora Radio-radio on our iPhone
d. Help-restaurant opinions

Question forty two. What Is Iphone Reference Library?

Answer :

iPhone reference library is a fixed of reference documents for iPhone OS. It can be downloaded by using subscribing to the iPhone OS Library document set. Select Help>Documentation from X code, and click the subscribe button next to the iPhone OS Library doc set, which appears inside the left column.

JQuery Mobile Interview Questions
Question forty three. What Is Iphone Sdk?

Answer :

iPhone SDK is to be had with equipment and interfaces wanted for developing, putting in and strolling custom native packages. Native applications are built the usage of the iPhone OS’s device frameworks and Objective-C language and run immediately on iPhone OS. Native applications are set up physically on a tool and might run in presence or absence of community connection.

Question forty four. What Is Iphone Architecture?

Answer :

iPhone architecture is similar to Mac OS X structure
It acts as an middleman among the iPhone and iPod hardware an the performing programs at the display screen.
The consumer created packages by no means engage directly with the appropriate drivers, which protects the consumer programs from adjustments to the hardware.

Question forty five. What Are The Location Services?

Answer :

Applications which include Maps, digicam and compass are allowed to use the information from mobile, WiFi and Global Positioning System networks for determining the approximate places.
The place is displayed at the display screen, using a blue marker.

Question 46. Describe The Functionality Of Accelerometer Of An Iphone?

Answer :

iPhone responds to motion the usage of a integrated accelerometer. The accelerometer detects the motion and modifications the show therefore, at the time of rotating iPhone from portrait to panorama.