Logic Square System Engineer Interview Questions and Answers

Inheritance is a mechanism in Java where a class acquires the properties of another class.

• Inheritance allows code reusability and promotes the concept of hierarchical classification.

• The class that is being inherited is called the superclass or parent class, while the class that inherits is called the subclass or child class.

• Java supports single inheritance, where a subclass can inherit properties from only one supercla...read more

OOPs concepts are the fundamental principles of object-oriented programming.

• Abstraction

• Encapsulation

• Inheritance

• Polymorphism

• Classes and Objects

• Methods and Properties

• Message Passing

• Dynamic Binding

Access specifiers determine the level of access to class members.

• Access specifiers are public, private, and protected.

• Public members can be accessed from anywhere.

• Private members can only be accessed within the class.

• Protected members can be accessed within the class and its subclasses.

• Example: class Car { private int speed; public void setSpeed(int s) { speed = s; } }

OOPs concepts in Java are the fundamental principles of object-oriented programming.

• Encapsulation: wrapping data and code into a single unit

• Inheritance: creating new classes from existing ones

• Polymorphism: using a single interface to represent multiple types

• Abstraction: hiding implementation details from the user

• Examples: class, object, inheritance, polymorphism, encapsulation

Stack is a LIFO data structure while Queue is a FIFO data structure.

• Stack follows Last In First Out (LIFO) principle while Queue follows First In First Out (FIFO) principle.

• Stack has two main operations: push and pop while Queue has two main operations: enqueue and dequeue.

• Stack is used in recursive function calls, undo/redo operations, and backtracking while Queue is used in breadth-first search, printing tasks in ord...read more

SQL query to find second highest salary in database

• Use ORDER BY and LIMIT to get the second highest salary

• Assume ties are allowed and use DISTINCT

The parent class of all classes in Java is the Object class.

• All classes in Java implicitly extend the Object class.

• The Object class provides basic methods such as toString(), equals(), and hashCode().

• Any class can override these methods to provide custom implementations.

• Example: public class MyClass extends Object { ... }

• Example: Object obj = new MyClass();

SQL databases are relational and use structured query language, while NoSQL databases are non-relational and use various data models.

• SQL databases are based on a fixed schema, while NoSQL databases are schema-less.

• SQL databases use tables to store data, while NoSQL databases use various data models like key-value, document, columnar, or graph.

• SQL databases are better suited for complex queries and structured data, whil...read more

I am a dedicated and hardworking individual with a passion for learning and growth.

• I have a Bachelor's degree in Business Administration from XYZ University.

• I have 3 years of experience working in marketing and sales roles.

• I am proficient in Microsoft Office Suite and have strong communication skills.

• I am a team player and enjoy collaborating with others to achieve common goals.

My career objectives focus on continuous growth, contributing to team success, and making a positive impact in my field.

• Aim to develop expertise in my field, such as becoming a certified project manager.

• Seek leadership opportunities to guide and mentor junior team members.

• Aspire to work on innovative projects that challenge my skills and creativity.

• Desire to contribute to a company's mission, like improving customer sa...read more

TCS is a global leader in IT services with a strong reputation for innovation and client satisfaction.

• TCS has a proven track record of delivering high-quality services to clients worldwide.

• TCS offers a wide range of opportunities for career growth and development.

• TCS values diversity and inclusion, creating a supportive work environment for employees.

• TCS invests in cutting-edge technologies and training programs to kee...read more