Interview Questions and Answers

Yes, I have used the Factory and Singleton design patterns in my previous project.

• I used the Factory pattern to create objects of different classes based on a common interface.

• This helped in reducing the coupling between the client code and the implementation classes.

• I used the Singleton pattern to ensure that only one instance of a class is created and used throughout the application.

• This helped in reducing the memory footprint and ensured that the state of the object was co...read more

I led a project to develop a new mobile app, ensuring the code structure was independent and scalable. Faced challenges with tight deadlines and changing requirements.

• Led project to develop mobile app

• Ensured code structure was independent and scalable

• Challenges with tight deadlines and changing requirements

FFT is a faster algorithm for calculating DFT. CMSIS DSP is a library for signal processing on ARM Cortex-M processors.

• FFT is a more efficient algorithm for calculating the Discrete Fourier Transform (DFT).

• CMSIS DSP is a library provided by ARM for signal processing on Cortex-M processors.

• CMSIS DSP provides optimized functions for common signal processing tasks like filtering, FFT, and matrix operations.

Doubly linked list is a data structure with nodes having pointers to both previous and next nodes.

• Each node has a 'prev' and 'next' pointer

• Insertion and deletion can be done at any position

• Traversal can be done in both directions

Check if a given number is a power of 2

• Check if the number is greater than 0

• Use bitwise AND operation to check if only one bit is set in the binary representation of the number

• If the result is 0, then the number is a power of 2

Oops concepts are fundamental to software engineering and are used in real-time projects for better code organization and maintenance.

• Encapsulation: Hiding implementation details and exposing only necessary information.

• Inheritance: Reusing code and creating a hierarchy of classes.

• Polymorphism: Using a single interface to represent multiple types of objects.

• Abstraction: Focusing on essential features and ignoring implementation details.

• Examples: Using inheritance to create a b...read more

Broadcast receiver is a component in Android that allows the system to deliver events to the app.

• Component in Android system

• Receives and handles broadcast messages

• Used to respond to system-wide events

• Registered in the AndroidManifest.xml file

IntentService is a class in Android that performs long-running operations in the background without blocking the main thread.

• IntentService is a subclass of Service that handles asynchronous requests (expressed as Intents) on demand.

• It is typically used for tasks like downloading files, syncing data, or performing any other background task.

• IntentService runs on a separate worker thread, so it does not interfere with the main UI thread.

• Once the task is completed, the IntentServ...read more