android Lead Interview Questions and Answers

Program to slice and rearrange array without extra variables or inbuilt methods

• Use a loop to iterate through the array and shift elements to the left

• Use a temporary variable to store the first element and move the rest of the elements one position to the left

• Repeat the above step until the desired index is reached

• Then move the temporary variable to the end of the sliced array

• Continue shifting the remaining elements to the left until the end of the array is reached

Launch modes determine how a new instance of an activity is associated with the current task.

• There are four launch modes: standard, singleTop, singleTask, and singleInstance.

• Standard is the default mode and creates a new instance of the activity every time it is launched.

• SingleTop mode checks if there is already an instance of the activity at the top of the task stack and reuses it if possible.

• SingleTask mode creates a new task for the activity and places it at the root of th...read more

Inline function is a function that is expanded in line when it is called, rather than calling a separate function.

• Inline functions are used to improve performance by reducing the overhead of function calls.

• They are defined using the 'inline' keyword.

• They are commonly used in C++ programming.

• Example: inline int add(int a, int b) { return a + b; }

A factory is used to create objects of a specific class without exposing the creation logic to the client.

• Factories provide a way to create objects without exposing the creation logic to the client.

• They can be used to create objects of a specific class or a group of related classes.

• Factories can be used to implement the Singleton pattern, where only one instance of a class is created.

• They can also be used to implement the Abstract Factory pattern, where a family of related ob...read more