3F Advanced Techno Labs Lead Engineer Interview Questions and Answers

Second level cache is a caching mechanism used to improve performance by storing frequently accessed data in memory.

• Second level cache is implemented at the application level and can be configured using frameworks like Hibernate.

• To optimize SQL queries, one can use indexes, avoid using SELECT *, and use JOINs instead of subqueries.

• SOLID principles are a set of design principles for writing maintainable and scalable cod...read more

To deploy an application in AWS, you need to create an EC2 instance, configure security groups, install necessary software, and upload your application code.

• Create an EC2 instance in the desired region and select the appropriate instance type

• Configure security groups to allow traffic to and from the instance

• Install necessary software and dependencies on the instance

• Upload your application code to the instance

• Start the ...read more

OOPS stands for Object-Oriented Programming System.

• OOPS is a programming paradigm that focuses on objects and their interactions.

• It involves encapsulation, inheritance, and polymorphism.

• Encapsulation is the process of hiding implementation details from the user.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects to take on multiple forms or behaviors.

• Examples of O

A blueprint for creating objects that share common properties and behaviors.

• Classes are used in object-oriented programming to create objects with similar attributes and methods.

• They serve as a blueprint for creating objects.

• Classes can inherit properties and methods from other classes.

• Examples include a class for creating different types of cars or a class for creating different types of animals.

Abstraction is the process of hiding complex implementation details and exposing only the necessary information.

• Abstraction allows us to focus on the essential features of an object or system, without getting bogged down in unnecessary details.

• It helps to reduce complexity and increase efficiency in software development.

• For example, a car dashboard abstracts away the complex workings of the engine and presents only the...read more

Object slicing is when a derived class object is assigned to a base class object, resulting in loss of derived class attributes.

• Object slicing occurs when a derived class object is assigned to a base class object.

• The result is the loss of derived class attributes.

• This happens because the base class object can only hold the attributes of the base class.

• Example: class Base { int x; }; class Derived : public Base { int y;...read more