Z X Learning Data Science Trainer Interview Questions and Answers

They have an Online Aptitude cum coding test which contains some 20-30 Question to be done in 3Hrs.
20 Questions of Aptitude and 10 Questions of coding(Which includes Display output and correct the program Questions)

Easy Interview lasting about 30-45 Mins
They mostly ask questions based on projects and they like to see some certifications.
DSA questions were easy to medium.

Basic question of indiabix topics and 10 code questions

Q1. Resume based questions,coding questions,core subject questions
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Q2. What is indexing in dbms?
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Q3. Secondlargest element
Ans. 
Find the second largest element in an array of integers efficiently.
• Iterate through the array while keeping track of the largest and second largest elements.

• Initialize two variables: largest and secondLargest to negative infinity.

• For each element, update largest if the current element is greater than largest.

• If the current element is less than largest but greater than secondLargest, update secondLargest.

• Example: For ar...read more
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Q4. Pascal triangle
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My name is amar reverse the string without using inbuilt method

Q1. What is nodejs and what is promise. What is closures
Ans. 
Node.js is a runtime environment for executing JavaScript code outside of a web browser. Promises are objects representing the eventual completion or failure of an asynchronous operation. Closures are functions that have access to their own scope, as well as the scope in which they were defined.
• Node.js is a runtime environment that allows you to run JavaScript on the server-side.

• Promises are used in asynchronous progra...read more
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Q1. Related to work experience and skills on Resume
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Q2. Formula to find midpoint and slope of a line
Ans. 
Midpoint and slope formulas help determine key characteristics of a line in coordinate geometry.
• Midpoint formula: M = ((x1 + x2)/2, (y1 + y2)/2). Example: M = ((1 + 3)/2, (2 + 4)/2) = (2, 3).

• Slope formula: m = (y2 - y1) / (x2 - x1). Example: m = (4 - 2) / (3 - 1) = 1.

• Midpoint gives the center point between two coordinates.

• Slope indicates the steepness and direction of the line.
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Logical reasoning and non verbal questions

Basic dsa concepts and find the syntax error

Q1. Basics about oops dsa question and question related to your projects
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Test consist of 25 Apatitude Question and 10 Coding problems of Debugging code, Find Output, Set Matrixs, Valid Matrix, Height of N-ary Tree, Sorting, Linked List etc. So prepare well with standard dsa problems of any sheet (striver sheet)

Q1. Technical Round consist of one coding question and detailed discussion on my smart india hackathon project and counter question on it with some of question on performance and security.
Ans. Performance Technique in React/Node ReactJS Interview Question
Answered by Dharmesh Vala
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Q2. Find 2nd Largest Element in array
Ans. 
To find the second largest element in an array, iterate through the array while tracking the largest and second largest values.
• Initialize two variables: 'largest' and 'secondLargest' to negative infinity.

• Iterate through each element in the array.

• For each element, update 'largest' if the current element is greater than 'largest'.

• If the current element is less than 'largest' but greater than 'secondLargest', update 'seco...read more
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Q3. Question on Redux also asked to pass information in reactjs.
Ans. Before interview refer redux documentation and standard interview question.
Answered by Dharmesh Vala
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Q4. Authentication and Authorization question on my project
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Q5. Security issues in your project
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Object oriented programming questions

Combination of all letters in a word