Sigmoid Interview Questions, Process, and Tips

General Aptitude test and 3 Medium level coding questions

Q1. Sortr an array of 0,1
Ans. 
Sort an array of 0s and 1s
• Use a sorting algorithm like counting sort or two-pointer approach

• Count the number of 0s and 1s and then reconstruct the array

• Example: Input array = ['0', '1', '0', '1', '1'], Output array = ['0', '0', '1', '1', '1']
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Q2. Matrix traversal in spiral Manner
Ans. 
Matrix traversal in spiral manner involves visiting each element of a matrix in a spiral order.
• Start by traversing the outermost layer of the matrix from top left to top right, then top right to bottom right, bottom right to bottom left, and finally bottom left to top left.

• Continue this process for the inner layers until all elements are visited.

• Keep track of the boundaries of the matrix to know when to switch directio
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Questions on Trees, Sorting

Q1. High Level System Design
Ans. 
High level system design involves creating an overview of the architecture and components of a software system.
• Identify the main components of the system

• Define the interactions between components

• Consider scalability and performance requirements

• Choose appropriate technologies and frameworks

• Create a diagram to visualize the system architecture
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Q1. Basic HR questions
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Simple Aptitude questions, Data interpretation and verbal

Q1. Basic questions on Data Analytics, Projects mentioned
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Q2. Code in SQL and python(moderate)
Ans. 
The candidate is asked to code in SQL and Python at a moderate level.
• Use SQL to query data from databases

• Use Python to manipulate and analyze data

• Practice writing SQL queries and Python scripts
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Q3. Machine Learning
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Topics advance mathematics and electronics

Q1. Valid parentheses
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Q2. Currying with arrow function
Ans. 
Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of nested functions, each taking a single argument.
• Currying can be achieved using arrow functions in JavaScript.

• Arrow functions automatically bind 'this' and do not have their own 'this' value.

• Example: const add = a => b => a + b;

• Example: const addFive = add(5); const result = addFive(3); // result
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Q1. DFS related problem
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Q2. Machine coding round
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Aptitudes of everything

Coding test in round 1 only