20+ Nexus Software Interview Questions and Answers

Threading is a way to execute multiple threads simultaneously. Python has a threading module to implement it.

• Threading allows for concurrent execution of multiple threads.

• Python's threading module provides a way to create and manage threads.

• Threads can be created by subclassing the Thread class or by passing a callable to the constructor.

• The GIL (Global Interpreter Lock) in Python limits true parallelism, but threading can still be useful for I/O-bound tasks.

• Thread synchroniz...read more

Calculate revenue for a company based on SKUs and prices.

• Multiply the quantity of each SKU sold by its price

• Sum up the total revenue from all SKUs

• Revenue = Quantity * Price

• Example: SKU1 - 100 units sold at $10 each, SKU2 - 50 units sold at $20 each

Remove zeroes from a numbers only string and insert at last while maintaining relative order.

• Iterate through the string and separate numbers and zeroes

• Store numbers in an array and zeroes in a separate array

• Concatenate the numbers array with the zeroes array at the end

DFS is a graph traversal algorithm that explores as far as possible along each branch before backtracking.

• DFS can be used to find connected components in a graph.

• It can also be used to detect cycles in a graph.

• DFS can be implemented using recursion or a stack.

• DFS is not guaranteed to find the shortest path in a graph.

• DFS can be used to solve problems such as maze traversal and topological sorting.

My favorite programming language is Python because of its readability, versatility, and extensive libraries.

• Python is known for its readability, making it easier to write and maintain code.

• Python is versatile and can be used for web development, data analysis, machine learning, and more.

• Python has a vast collection of libraries like NumPy, Pandas, and Matplotlib that make data manipulation and visualization easier.

Challenges in RMG role include managing diverse teams, meeting production targets, and ensuring compliance. Resolutions involve effective communication, training, and process improvement.

• Managing diverse teams with different skill levels and backgrounds

• Meeting production targets while maintaining quality standards

• Ensuring compliance with regulations and industry standards

• Resolution: Effective communication to align team goals, training to improve skills, process improvement t...read more

Duplicates finding in SQL is the process of identifying and removing duplicate records from a database table.

• Use the DISTINCT keyword in a SELECT statement to retrieve unique records

• Use the GROUP BY clause with COUNT() function to identify duplicate records

• Use the ROW_NUMBER() function to assign a unique row number to each record and filter out duplicates

Mutable objects can be changed after creation, while immutable objects cannot be changed.

• Mutable objects can have their values modified after creation, while immutable objects cannot.

• Examples of mutable objects include lists, dictionaries, and sets.

• Examples of immutable objects include strings, tuples, and frozensets.

The Rain water trap DSA problem involves calculating the amount of rainwater that can be trapped between given bars.

• The problem involves finding the maximum height of bars on either side of a given bar.

• Calculate the difference between the maximum height and the height of the given bar to get the amount of water trapped.

• Repeat the above steps for all bars to get the total amount of water trapped.

Analyzing different situations within the same problem allows for a comprehensive understanding and effective solutions.

• Identify the various factors contributing to the problem

• Consider how each factor interacts with the others

• Evaluate potential solutions based on the different scenarios

• Adjust strategies as needed based on the changing circumstances

Java OOPs concept refers to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.

• Java OOPs concept includes inheritance, where a class can inherit properties and behaviors from another class.

• Encapsulation involves bundling data and methods that operate on the data into a single unit.

• Polymorphism allows objects to be treated as instances of their parent class, enabling flexibility in code.

• Abstraction focuses on hiding the implem...read more

Left join returns all records from the left table and the matched records from the right table, while right join returns all records from the right table and the matched records from the left table.

• Left join keeps all records from the left table, even if there are no matches in the right table.

• Right join keeps all records from the right table, even if there are no matches in the left table.

• Example: If we have a table of employees and a table of departments, a left join will r...read more

SQL commands are instructions used to interact with databases to perform tasks such as querying, updating, and managing data.

• SQL commands are used to perform various operations on databases, such as SELECT, INSERT, UPDATE, DELETE.

• Examples of SQL commands include SELECT * FROM table_name, INSERT INTO table_name (column1, column2) VALUES (value1, value2), UPDATE table_name SET column1 = value1 WHERE condition, DELETE FROM table_name WHERE condition.

• SQL commands can also be used...read more

SQL is a programming language used for managing and manipulating relational databases.

• SQL stands for Structured Query Language

• It is used to communicate with databases to perform tasks such as querying data, updating data, and creating tables

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE

• Example: SELECT * FROM customers WHERE city = 'New York';

Snowpipe is a continuous data ingestion service provided by Snowflake for loading streaming data into tables.

• Snowpipe allows for real-time data loading without the need for manual intervention.

• It can load data from various sources such as Amazon S3, Azure Blob Storage, and Google Cloud Storage.

• Snowpipe uses a queue-based architecture to process data as soon as it arrives.