RubicoIT Interview Questions and Answers

Q1. Given two codes to identify there output, the code includes the concept of 'this' keyword and its behavior with arrow functions and normal functions.
Ans. 
The code demonstrates the behavior of 'this' keyword with arrow functions and normal functions.
• Arrow functions do not bind their own 'this' value, it inherits 'this' from the surrounding scope.

• Normal functions have their own 'this' value, which is determined by how the function is called.

• Arrow functions are useful when you want to preserve the value of 'this' from the surrounding context.
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Q2. Given a coding question to get even numbers in a different array from the original array of numbers.
Ans. 
Extract even numbers from an array and store them in a new array using JavaScript.
• Use the filter() method to create a new array with even numbers. Example: [1, 2, 3, 4].filter(num => num % 2 === 0) returns [2, 4].

• The filter() method iterates through each element and applies a condition. If the condition is true, the element is included in the new array.

• You can also use a for loop to achieve the same result. Initiali...read more
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Q3. Given SQL database structure and questions to which was asked to form SQL queries, it includes knowledge of 'joins' and use of subquery.
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Q4. Given a question to take the input from a user and print the sum of those input and return the output (javascript).
Ans. 
This code takes user input, calculates the sum, and prints the result using JavaScript.
• Use prompt() to take user input in a browser environment.

• Convert input strings to numbers using parseInt() or parseFloat().

• Use a loop to allow multiple inputs until a specific condition is met.

• Example: let sum = 0; while (true) { let input = prompt('Enter a number (or type exit):'); if (input === 'exit') break; sum += parseFloat(inpu...read more
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Q5. What are streams and its type, write a code using the any of the stream.
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Streams are objects that allow reading or writing data continuously. There are four types of streams: Readable, Writable, Duplex, and Transform.
• Streams are used to handle large amounts of data efficiently.

• They can be used for reading data from a source or writing data to a destination.

• Streams can be piped together to create a data flow.

• Example: Reading a file using a Readable stream and writing it to another file using...read more
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This was a Machine Coding round, i was asked to come to office for this round. I was given to make a nodejs project from scratch using , any framework of my choice (expressjs, nestjs,etc), using sql database (any ORM of your choice).

Entities - User, Task

User -
1. user should have an email , first name, last name and password
2. user can login using email and password

Task -
1. CRUD for the task
2. Each task should be associated with a user

Extra (if time)-
1. User can assign task to different user

Note :- Time given was 2 Hours, i could not do the extras , but i was asked the question regarding my thought process on how will i approach the extras, because extras required a change in the already made entity models as well as in relations between them if any.

Good and it was moderate

Q1. Asked about projects and related to that
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Q2. Asked few question about dsa
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It was basic aptitude test comparatively easy

Basic dynamic programming with little basic coding ques

Q1. All about dbms basics. The core concepts of dbms . That was face to face
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Q1. Face to face hr round. Introduction norms about the company
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