NTT Data Senior Software Associate Interview Questions and Answers

Inheritance, abstract class, override, and interface are all concepts in object-oriented programming.

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

• Abstract classes cannot be instantiated and are used as a blueprint for other classes.

• Override is used to provide a new implementation for a method that is already defined in a parent class.

• Interfaces define a set of methods that a class mus...read more

Full text index is a database index that allows for efficient text-based searching.

• Full text index is used to search for specific words or phrases within a large amount of text data.

• It is commonly used in search engines, document management systems, and social media platforms.

• Full text index can be created on one or more columns of a table in a database.

• It uses techniques such as stemming, stop words, and word proximit...read more

Constructors and destructors are special methods used in object-oriented programming languages to initialize and destroy objects.

• Constructors are used to initialize objects when they are created.

• Destructors are used to clean up resources used by an object when it is destroyed.

• Constructors have the same name as the class and are called automatically when an object is created.

• Destructors have the same name as the class p...read more

PHP 7 is faster, more secure and has new features compared to PHP 5.

• PHP 7 has improved performance with up to 2x faster execution

• PHP 7 has better error handling and type declarations

• PHP 7 has new operators and functions like spaceship operator and null coalescing operator

• PHP 7 has removed deprecated features like mysql extension

• PHP 7 has improved support for Unicode

• PHP 7 requires 64-bit architecture

• PHP 7 has improved m...read more

PHP caching, session handling, and API token security

• PHP caching techniques include opcode caching, data caching, and query caching

• Session handling in PHP involves creating a unique session ID for each user and storing session data on the server

• To prevent token hijacking in APIs, use HTTPS, set expiration times for tokens, and use token revocation

• Other security measures include input validation, output encoding, and us

Store procedures, indexes, and virtual tables are important features of MySql.

• Store procedures are pre-written code blocks that can be executed on demand.

• Indexes are used to speed up database queries by creating a quick lookup table.

• Virtual tables are temporary tables that are created on the fly and do not persist in the database.

• Examples of store procedures include creating a new user or updating a record.

• Examples of ...read more

Explanation of concurrent hash map and compile time vs run time polymorphism

• Concurrent hash map allows multiple threads to access and modify the map concurrently without any external synchronization

• Method overloading is compile time polymorphism as the decision of which method to call is made by the compiler at compile time based on the number and types of arguments passed

• Method overriding is run time polymorphism as t...read more

Networking is the practice of connecting devices together to share resources and information.

• Networking involves the use of hardware and software to connect devices together.

• It allows for the sharing of resources such as printers and files.

• Networking also enables communication between devices, such as sending emails or accessing websites.

• Examples of networking technologies include Ethernet, Wi-Fi, and Bluetooth.

We used a variety of technologies including Java, Spring Boot, React, and MySQL.

• Java was used for the backend development

• Spring Boot was used to create RESTful APIs

• React was used for the frontend development

• MySQL was used as the database management system

Server and client are two entities in a client-server architecture where the server provides services to the client.

• Server is a computer program or device that provides services to other computer programs or devices, known as clients.

• Client is a computer program or device that requests services from a server.

• Examples of servers include web servers, mail servers, and file servers.

• Examples of clients include web browsers