Newgen Software Technologies Interview Questions and Answers

To find the third highest element, use SQL queries with ORDER BY and LIMIT clauses.

• Use the SQL query: SELECT DISTINCT column_name FROM table_name ORDER BY column_name DESC LIMIT 1 OFFSET 2;

• This query selects distinct values from the specified column, orders them in descending order, and skips the first two results.

• Example: To find the third highest salary: SELECT DISTINCT salary FROM employees ORDER BY salary DESC...read more

This code snippet demonstrates how to reverse a string using various programming techniques.

• Using Python slicing: `reversed_string = original_string[::-1]`

• Using a loop: `reversed_string = ''.join(original_string[i] for i in range(len(original_string)-1, -1, -1))`

• Using recursion: `def reverse_string(s): return s if len(s) == 0 else s[-1] + reverse_string(s[:-1])`

• Using built-in functions: `reversed_string = ''.join(...read more

Overriding allows a subclass to provide a specific implementation of a method already defined in its superclass.

• Overriding occurs when a subclass has a method with the same name and parameters as a method in its superclass.

• It enables polymorphism, allowing a subclass to define behavior specific to its type.

• Example: If a superclass 'Animal' has a method 'makeSound()', a subclass 'Dog' can override it to provide a s...read more

React is a library for building UI, while Angular is a full-fledged framework for web applications.

• React uses a virtual DOM for efficient rendering, while Angular uses a real DOM.

• React is component-based and focuses on UI, whereas Angular is a complete MVC framework.

• React allows for more flexibility and is often used with other libraries, while Angular provides a more opinionated structure.

• React uses JSX, a syntax...read more

Object-oriented programming (OOP) in Java is a paradigm based on objects that encapsulate data and behavior.

• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: class 'Car' with attributes like 'color' and methods like 'drive()'.

• Inheritance: Mechanism to create a new class from an existing class, inheriting its properties. Example: class 'ElectricCar' extends 'Car'.

• Po...read more

SQL joins combine rows from two or more tables based on related columns, enabling complex queries and data retrieval.

• Use INNER JOIN to return records with matching values in both tables. Example: SELECT * FROM Orders INNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID;

• LEFT JOIN returns all records from the left table and matched records from the right table. Example: SELECT * FROM Customers LEFT JOIN ...read more

Arrange characters in arrays by sorting or manipulating strings for various applications.

• Use built-in sorting functions: In Python, use sorted() to arrange strings alphabetically. Example: sorted(['banana', 'apple']) returns ['apple', 'banana'].

• Custom sorting: Implement a custom sort function to arrange strings based on specific criteria, like length or character frequency.

• Reversing strings: Use slicing to reverse...read more

Oops concept is a programming paradigm that focuses on objects and classes, promoting code reusability and modularity.

• Encapsulation: bundling data and methods that operate on the data within a single unit

• Inheritance: allows a class to inherit properties and behavior from another class

• Polymorphism: ability for objects to be treated as instances of their parent class

• Abstraction: hiding the complex implementation det...read more