British Petroleum Senior Software Engineer Interview Questions and Answers

Interviewer asked to create a case study on the current project and mention all the technologies involved

Q1. Implement Immutable class
Ans. 
Immutable class is a class whose state cannot be modified after creation.
• Use final keyword to make class immutable

• Make all fields private and final

• Do not provide setter methods

• If mutable objects are used, return a copy instead of original object
Answered by AI
Add your answer
Q2. Solid principles, questions followed by each principle with good and bad examples
Add your answer

Q1. What are deecorators in Python
Ans. 
Decorators in Python are functions that modify the behavior of other functions or methods.
• Decorators are denoted by the @ symbol followed by the decorator function name.

• They are commonly used for logging, authentication, and memoization.

• Example: @staticmethod, @classmethod, @property
Answered by AI
Add your answer
Q2. If the object is defined with "const" keyword, then in future can it be modified?
Ans. 
No, if an object is defined with 'const' keyword, it cannot be modified in the future.
• Objects defined with 'const' keyword are read-only and cannot be reassigned.

• Properties of a 'const' object can still be modified, but the object itself cannot be reassigned.

• Example: const obj = { key: 'value' }; obj.key = 'new value'; // Valid, but obj = { newKey: 'newValue' }; // Invalid
Answered by AI
Add your answer

Apptitude test is first round

GD is my second round

Q1. Tell me about yourself.
Add your answer
Q2. Why should we hire you
Add your answer
Q3. What is your family background
Add your answer
Q4. Why are you looking for a change
Add your answer
Q5. What are your strength and weekness
Add your answer

Q1. What is oops, explain them?
Ans. 
Object-oriented programming (OOP) is a programming paradigm that uses objects to represent and manipulate data.
• OOP is based on the concept of classes and objects.

• It allows for encapsulation, inheritance, and polymorphism.

• Encapsulation hides the internal details of an object and provides a public interface.

• Inheritance allows classes to inherit properties and methods from other classes.

• Polymorphism allows objects of diff...read more
Answered by AI
View 1 more answer
Q2. What is difference between interface and abstract class?
Ans. 
Interface defines only method signatures while abstract class can have method implementations.
• An interface can be implemented by multiple classes while a class can extend only one abstract class.

• An abstract class can have instance variables while an interface cannot.

• An abstract class can have constructors while an interface cannot.

• An abstract class can provide default implementations for some methods while an interface...read more
Answered by AI
View 1 more answer
Q3. What is difference between docker and kubernet?
Ans. 
Docker is a containerization platform while Kubernetes is a container orchestration tool.
• Docker is used to create, deploy, and run applications in containers.

• Kubernetes is used to manage and orchestrate multiple containers in a cluster.

• Docker provides a way to package and distribute applications in a portable manner.

• Kubernetes provides features like automatic scaling, load balancing, and self-healing.

• Docker is a lower-...read more
Answered by AI
Add your answer
Q4. What is event emitter in angular?
Ans. 
Event emitter is a class in Angular that allows communication between components.
• Event emitter is used to emit custom events in Angular.

• It allows communication between parent and child components.

• It can be used to pass data from child to parent component.

• It is a part of the @angular/core package.

• Example: @Output() eventEmitter = new EventEmitter();
Answered by AI
Add your answer
Q5. What is view encapsulation in angular?
Ans. 
View encapsulation is a feature in Angular that allows for the creation of isolated components.
• View encapsulation ensures that styles defined in a component do not affect other components.

• There are three types of view encapsulation: Emulated, Native, and None.

• Emulated is the default and uses CSS to emulate shadow DOM.

• Native uses the browser's native shadow DOM implementation.

• None does not provide any view encapsulation
Answered by AI
Add your answer
Q6. How to communicate with components in angular?
Ans. 
Components in Angular can communicate with each other using @Input, @Output, and services.
• Use @Input to pass data from parent to child component

• Use @Output to emit events from child to parent component

• Use services to share data between components that are not directly related

• Use RxJS subjects to create a shared data stream between components
Answered by AI
View 1 more answer

Streams related coding questions

Q1. Spring boot, security etc
Add your answer
Q2. Java multithreading scenarios
Add your answer
Q3. Scenario based questions on MS side
Add your answer

Q1. Basic c# threading
Add your answer

Q1. STAR pattern related question
Add your answer