10+ Smart Energy Water Interview Questions and Answers

Find the majority element in an array, return -1 if no majority element exists.

• Iterate through the array and keep track of the count of each element using a hashmap.

• Check if any element's count is greater than floor(N / 2) to determine the majority element.

• Return the majority element or -1 if no majority element exists.

Rotate a matrix to the right 'K' times by shifting each column to the right 'K' times.

• Iterate 'K' times to perform right rotation on the matrix

• Shift each column to the right by one position in each iteration

• Handle the edge cases where 'K' is greater than the number of columns

Evaluate postfix expressions by applying operators after operands. Return result modulo (10^9+7).

• Iterate through each character in the postfix expression

• If character is an operand, push it onto the stack

• If character is an operator, pop two operands from stack, apply operator, and push result back

• Continue until end of expression, return final result modulo (10^9+7)

I write functional compliances by thoroughly reviewing the RFx requirements and ensuring that our proposal meets all the specified criteria.

• Review the RFx document carefully to understand the functional requirements

• Create a compliance matrix to track how each requirement is addressed in the proposal

• Clearly outline how our solution meets each functional requirement in the proposal

• Provide evidence or examples to support our claims of compliance

• Ensure that the language used is c...read more

Windows functions are built-in functions provided by the Windows operating system to perform various tasks.

• Windows functions are used to interact with the operating system, such as creating windows, handling messages, and managing resources.

• Examples of Windows functions include CreateWindow, SendMessage, and LoadLibrary.

• Windows functions are typically called through the Windows API (Application Programming Interface).

Integrating the online merchant involves collaborating with the merchant's technical team to set up API connections and ensure seamless transactions.

• Collaborate with the online merchant's technical team to set up API connections

• Ensure seamless transactions by testing the integration thoroughly

• Provide support and training to the merchant's team on how to use the integrated system

The proposal response format and structure typically includes an executive summary, introduction, body, conclusion, and appendices.

• Executive summary provides a brief overview of the proposal.

• Introduction sets the context and outlines the objectives.

• Body includes detailed information on the proposed solution, methodology, timeline, and budget.

• Conclusion summarizes key points and reiterates the benefits of the proposal.

• Appendices contain additional supporting documents, such as...read more

Indexes are data structures that improve the speed of data retrieval in databases.

• Indexes are built on columns in database tables to quickly locate rows based on the indexed column values.

• They are typically implemented using B-tree or hash data structures.

• Examples of indexes include primary keys, unique keys, and non-unique indexes.

• Creating an index involves sorting the values of the indexed column and storing pointers to the corresponding rows.

Build a recommendation engine for Food Ordering App

• Collect user preferences and behavior data

• Use collaborative filtering to recommend similar items

• Implement machine learning algorithms to personalize recommendations

• Consider factors like location, cuisine, price range, and ratings

• Test and iterate to improve recommendation accuracy

DBMS stands for Database Management System. It is a software that allows users to interact with databases.

• DBMS is used to create, update, and manage databases.

• It provides tools for data storage, retrieval, and manipulation.

• Examples of DBMS include MySQL, Oracle Database, and Microsoft SQL Server.

Generics in Swift allow you to write flexible, reusable functions and types that can work with any type.

• Generics enable you to write functions and types that can work with any type, without specifying the actual type.

• They help in writing flexible and reusable code.

• Example: Array is a generic type in Swift that can hold elements of any type T.

It depends on the specific use case and requirements of the project.

• Use struct for lightweight data structures with no behavior or methods.

• Use class for more complex data structures with behavior and methods.

• Structs are value types while classes are reference types.

• Structs are typically used for small data structures like Point, Rectangle, etc.

• Classes are used for larger, more complex objects like Customer, Employee, etc.

The order of SQL queries is crucial for proper execution and data retrieval.

• Start with SELECT statement to retrieve data from database

• Follow with FROM clause to specify the table(s) to query

• Add WHERE clause to filter the results based on specified conditions

• Include ORDER BY clause to sort the results in a specific order

• Finish with any additional clauses like GROUP BY or JOIN if needed

SQL Indexes improve query performance by allowing faster data retrieval

• Indexes are data structures that improve the speed of data retrieval operations on a database table

• They work by creating a sorted list of specific columns in a table, allowing the database to quickly locate the rows that match a query

• Types of indexes include clustered indexes (physically reorders the table) and non-clustered indexes (separate data structure)

• Indexes should be used judiciously as they can im...read more