10+ HCLTech Software Development Engineer Interview Questions and Answers

DBMS is a software to manage databases while RDBMS is a type of DBMS that uses a relational model.

• DBMS stands for Database Management System while RDBMS stands for Relational Database Management System.

• DBMS can manage any type of database while RDBMS uses a specific model to manage data.

• RDBMS uses tables to store data and relationships between tables are defined by keys.

• Examples of RDBMS include MySQL, Oracle, and SQL Server while examples of DBMS include MongoDB and Cassandr...read more

Sum of Digit and Product of Digit are mathematical operations used in various applications.

• Sum of Digit is the sum of all the digits in a number. It is used in various applications like checking if a number is divisible by 3 or 9.

• Product of Digit is the product of all the digits in a number. It is used in various applications like checking if a number is a perfect square or if it has any repeated digits.

• Both operations are used in cryptography to generate and verify checksums...read more

OS stands for Operating System. macOS and Windows are two different operating systems with different user interfaces and functionalities.

• OS (Operating System) is a software that manages computer hardware and provides common services for computer programs.

• macOS is the operating system developed by Apple for their Macintosh computers.

• Windows is the operating system developed by Microsoft for personal computers.

• macOS has a more user-friendly interface and is known for its stabil...read more

OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects.

• OOPs focuses on creating objects that contain both data and functions.

• It emphasizes on encapsulation, inheritance, and polymorphism.

• Encapsulation is the process of hiding the implementation details of an object from the outside world.

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

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

• Exampl...read more

OOPs concepts are programming concepts that focus on objects and their interactions.

• OOPs stands for Object-Oriented Programming.

• It involves the use of classes, objects, inheritance, polymorphism, and encapsulation.

• Classes are templates for creating objects, while objects are instances of classes.

• Inheritance allows for the creation of new classes based on existing ones.

• Polymorphism allows for the use of a single interface to represent different types of objects.

• Encapsulation i...read more

Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.

• It involves breaking down a table into smaller tables and defining relationships between them.

• Normalization helps to eliminate data inconsistencies and anomalies.

• There are different levels of normalization, with each level having stricter rules for data organization.

• Examples of normalization include converting repeating groups into separate tables and creating a junct...read more

Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.

• Data structures are used to manage and manipulate data.

• They can be implemented using arrays, linked lists, trees, graphs, and more.

• Examples include stacks, queues, hash tables, and binary search trees.

Statics are class-level variables while constant variables are read-only variables.

• Static variables are shared among all instances of a class while constant variables are not.

• Static variables can be modified while constant variables cannot.

• Static variables are initialized only once while constant variables are initialized at declaration.

• Examples of static variables are counters, caches, and configuration settings.

• Examples of constant variables are pi, e, and the speed of ligh...read more

Abstraction is a concept of hiding implementation details while interface is a contract that defines the behavior of a class.

• Abstraction is achieved through abstract classes and methods

• Interface is a collection of abstract methods

• Abstraction can have non-abstract methods while interface only has abstract methods

• Abstraction can have constructors while interface cannot

• Abstraction is used for code reusability while interface is used for polymorphism

Python is dynamically typed and has simpler syntax, while Java is statically typed and has more verbose syntax.

• Python is interpreted, while Java is compiled

• Python has automatic memory management, while Java requires manual memory management

• Python is often used for scripting and data analysis, while Java is commonly used for enterprise applications

• Python has a larger standard library, while Java has better performance

• Python is easier to learn and write code quickly, while Java...read more

Array is a collection of elements of same data type stored in contiguous memory locations. Linked list is a collection of nodes where each node contains data and a reference to the next node.

• Arrays have fixed size, linked lists can grow dynamically

• Accessing elements in an array is faster than in a linked list

• Insertion and deletion operations are faster in a linked list than in an array

• Arrays are better for random access, linked lists are better for sequential access

• Examples: ...read more