Barclays Product Controller Interview Questions and Answers

CompletableFuture is an enhanced version of Future in Java that provides more flexibility and functionality.

• CompletableFuture is part of the Java 8 concurrency framework.

• It allows chaining of multiple asynchronous operations.

• CompletableFuture can be explicitly completed or cancelled.

• It supports callbacks and combinators for handling completion.

• Future is a basic interface for representing the result of an asynchronous c...read more

Composition is a design principle where objects are composed of other objects, while inheritance is a mechanism where objects inherit properties and behaviors from a parent object.

• Composition promotes code reusability and flexibility by allowing objects to be composed of other objects.

• Inheritance allows objects to inherit properties and behaviors from a parent object, promoting code reuse.

• Composition is more flexible t...read more

Parallel calls in Java allow multiple tasks to be executed simultaneously, improving performance.

• Parallel calls can be achieved using threads or the Executor framework.

• Threads allow concurrent execution of tasks, but require manual management of synchronization and resource sharing.

• The Executor framework provides higher-level abstractions for managing parallel tasks, such as thread pools and task scheduling.

• Example: us...read more

Lock and Sync Block are mechanisms used for thread synchronization in multi-threaded programming.

• Lock is a low-level synchronization mechanism that provides exclusive access to a shared resource.

• Sync Block is a higher-level synchronization mechanism that allows multiple threads to access a shared resource concurrently.

• Lock is more flexible and can be used in various scenarios, but it requires explicit acquisition and r...read more

I prioritize work compatibility by aligning my skills and values with the organization's goals.

• I ensure my work style and communication methods align with the team's dynamics.

• I adapt to the company's culture and values to enhance collaboration and productivity.

• I seek feedback and make adjustments to improve my performance and fit within the organization.

• I prioritize work-life balance to maintain productivity and well-b...read more

The distance from home is a key factor to consider when evaluating a job opportunity.

• Consider the commute time and transportation options available

• Think about the impact on work-life balance and personal well-being

• Evaluate the potential cost of commuting and the convenience of the location