Codeflies Technologies Android Developer Interview Questions and Answers

Multi-threading is the ability of a program to execute multiple threads concurrently, allowing for parallel processing.

• Multi-threading improves performance by utilizing multiple CPU cores.

• Each thread runs independently and can perform different tasks simultaneously.

• Threads can communicate and share data through synchronization mechanisms like locks and semaphores.

• Examples of multi-threading in Android include backgroun

Hash Map is a data structure that stores key-value pairs and allows fast retrieval of values based on their keys.

• Hash Map is implemented using an array of linked lists or a balanced tree.

• Keys in a Hash Map must be unique.

• Hash Map provides constant-time complexity for insertion, deletion, and retrieval operations.

• Example: HashMap map = new HashMap<>();

Array is a fixed-size collection, ArrayList is a dynamic-size collection, and Vector is a synchronized dynamic-size collection.

• Array is a basic data structure with a fixed size.

• ArrayList is a resizable array implementation of the List interface.

• Vector is similar to ArrayList but is synchronized, making it thread-safe.

• Example: String[] names = new String[5];

• Example: ArrayList names = new ArrayList<>();

• Example: Vector na

Yes, I am comfortable with timing, shifts, and salary.

• I am flexible with timing and shifts, willing to work evenings or weekends if needed.

• I am open to discussing salary and am confident in my skills and experience.

• I prioritize job satisfaction and growth opportunities over just the salary.