Synechron Senior Software Engineer Interview Questions, Process, and Tips for Experienced

Concurrent HashMap is thread-safe and allows concurrent access, while HashMap is not thread-safe.

• Concurrent HashMap is suitable for multi-threaded environments where multiple threads can access and modify the map concurrently.

• HashMap is not thread-safe and can lead to data corruption if accessed concurrently by multiple threads.

• Concurrent HashMap uses internal locking mechanisms to ensure thread safety, while HashMap d...read more

Partitioning a large database involves dividing the data into smaller chunks to improve performance and manageability.

• Identify key columns for partitioning, such as date ranges or customer IDs.

• Choose a partitioning strategy, such as range partitioning or hash partitioning.

• Implement partitioning using database features like table partitioning in Oracle or partitioned tables in PostgreSQL.

Collection's framework is a set of interfaces and classes that provide high-performance, high-quality implementations of data structures.

• Provides interfaces like List, Set, Map for storing and manipulating collections of objects

• Includes classes like ArrayList, LinkedList, HashSet, HashMap for concrete implementations

• Allows for easy iteration, sorting, searching, and manipulation of collections

• Supports generics to ensur

Redux is a predictable state container for JavaScript apps.

• Redux is a state management library commonly used with React.

• It follows a unidirectional data flow pattern.

• Actions are dispatched to update the state through reducers.

• State changes are handled immutably.

• Selectors can be used to access specific parts of the state.

• Middleware can be used for side effects like async operations.

• Example: Dispatching an action to add

Hooks in React are functions that let you use state and other React features in functional components.

• Hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that lets you perform side effects in functional components.

• Custom hooks are reusable functions that can contain statefu