10+ Spectral Consultants Interview Questions and Answers

No-SQL is a type of database that does not use the traditional tabular structure of relational databases.

• No-SQL databases are used when dealing with large amounts of unstructured or semi-structured data.

• They are suitable for real-time applications, big data, and cloud-based systems.

• Examples of No-SQL databases include MongoDB, Cassandra, and Redis.

OOPS concepts are fundamental principles in object-oriented programming.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class Car with properties like make, model, and methods like start(), stop().

• Inheritance: Allows a class to inherit properties and behavior from another class. Example: Class Truck inheriting from class Vehicle.

• Polymorphism: Ability to present the same interface for different data types. Example: Method overload...read more

Polymorphism in Java refers to the ability of a single method to perform different actions based on the object it is acting upon.

• Types of polymorphism: compile-time polymorphism (method overloading) and runtime polymorphism (method overriding)

• Method overloading: multiple methods in the same class with the same name but different parameters

• Example of method overloading: public void display(int a) and public void display(int a, int b)

• Method overriding: a subclass provides a spe...read more

DBMS stands for Database Management System. R-DBMS is a relational database management system which stores data in tables with relationships.

• DBMS is a software system that allows users to define, create, maintain and control access to the database.

• R-DBMS is a type of DBMS that stores data in tables with relationships between the tables.

• R-DBMS uses Structured Query Language (SQL) for accessing and managing the data.

• Examples of R-DBMS include MySQL, Oracle, SQL Server, and Post...read more

No, my training has primarily focused on Java development.

• My training has primarily focused on Java development, with a strong foundation in core Java concepts and frameworks.

• While I have a basic understanding of AI and ML concepts, I do not have formal training or experience in these technologies.

• I am open to learning and expanding my skills in AI and ML in the future.

I am familiar with Java 8 and Java 11.

• Familiar with features like lambda expressions, streams, and default methods in Java 8.

• Experience with features like local-variable type inference, HTTP/2 client, and new string methods in Java 11.

JSP pages were used in the project for dynamic content generation and seamless integration with Java code.

• JSP allows for easy integration of Java code for dynamic content generation.

• JSP pages can be easily maintained and updated without changing the Java code.

• JSP pages provide a way to separate presentation logic from business logic.

• JSP pages can be used to create reusable components for the project.

• JSP pages offer a familiar syntax for Java developers.

Disadvantages of DBMS include high cost, complexity, potential for data loss, and security vulnerabilities.

• High cost of implementation and maintenance

• Complexity in managing and scaling the database

• Potential for data loss due to system failures or human errors

• Security vulnerabilities that can lead to data breaches

• Dependency on a single vendor for support and updates

HashMap is a data structure in Java that stores key-value pairs and allows fast retrieval of values based on keys.

• HashMap implements the Map interface and uses hashing to store elements.

• It allows one null key and multiple null values.

• Example: HashMap map = new HashMap<>(); map.put("apple", 5); int value = map.get("apple");