Gartner Android Developer Interview Questions and Answers

Data Structures and Algorithms with time and space complexity analysis

• Discuss various data structures like arrays, linked lists, trees, graphs, etc.

• Explain common algorithms like sorting, searching, dynamic programming, etc.

• Analyze time complexity using Big O notation and space complexity using memory usage

• Provide examples of code snippets with their corresponding time and space complexities

Protocol extensions in iOS allow adding functionality to existing protocols without modifying the original protocol definition.

• Protocol extensions can provide default implementations for protocol methods.

• They can also add new methods and properties to conforming types.

• Protocol extensions are useful for adding common functionality to multiple types that conform to a protocol.

• Example: extending the Equatable protocol to ...read more

Merge combines changes from different branches, while rebase moves the entire branch to a new base commit.

• Merge creates a new commit to combine changes, while rebase rewrites commit history.

• Merge preserves the commit history of all branches, while rebase creates a linear history.

• Merge is non-destructive and keeps the original branch intact, while rebase modifies the branch being rebased.

• Example: 'git merge feature-bran

Protocol equitability ensures that all participants in a communication protocol have equal access and opportunity to send and receive data.

• Ensures fair and equal treatment of all participants in a communication protocol

• Prevents any participant from having an unfair advantage or disadvantage

• Promotes transparency and inclusivity in communication protocols

The Android application components used in the previous project include activities, services, broadcast receivers, and content providers.

• Activities: Used for the user interface and interaction with the user. Example: MainActivity.java

• Services: Used for background tasks or long-running operations. Example: DownloadService.java

• Broadcast Receivers: Used for system-wide events or notifications. Example: ConnectivityReceive...read more

Structs are value types and classes are reference types in Swift.

• Structs are passed by value, while classes are passed by reference.

• Structs are copied when assigned to a new variable, while classes point to the same instance.

• Use structs for simple data types and classes for more complex objects.

• Example: struct Point { var x: Int, y: Int } vs class Person { var name: String, age: Int }