Z X Learning Associate Software Engineer Interview Questions and Answers

Test was of 1.5 hrs and it was online. It was completely based on technical questions.

This test was offline and it was a pen paper test wherein 10 questions will be given you have to write code or spot the error and correct them.

Q1. Asked questions about React
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Q2. Question based on project
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Basic aptitude test, 2 coding questions based on arrays. One was easy other was hard

Q1. Tell me about arrays
Ans. 
Arrays are a data structure that stores a collection of elements of the same data type in contiguous memory locations.
• Arrays have a fixed size determined at the time of declaration.

• Elements in an array are accessed using an index starting from 0.

• Arrays can store primitive data types or objects.

• Example: String[] names = {"Alice", "Bob", "Charlie"};
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Q2. How does a linked list function
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A linked list is a data structure where each element points to the next element in the sequence.
• Each element in a linked list, called a node, contains data and a reference to the next node in the sequence.

• Linked lists can be singly linked (each node points to the next node) or doubly linked (each node points to both the next and previous nodes).

• To traverse a linked list, you start at the head node and follow the refere...read more
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Q1. What is latest technology you have worked on
Ans. 
I have worked on React Native for mobile app development.
• Developed a mobile app for a client using React Native

• Used Redux for state management

• Integrated with Firebase for real-time database and authentication

• Implemented push notifications using Firebase Cloud Messaging
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Q1. Why you want to join us
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So prepare good amout of aptitude , and try to solve at least 15 Questions

It was an Online coding test 2 questions were there. difficulty (Easy and Medium).

The third round was again an coding round but it was a pen and paper test , it was in offline mode they will tell you the center after you will complete 2nd round.
In pen and paper test there are 10 coding questions and from topics array , string , recursion , Bit manipulation , BST , Linked List. so you have to solve at least 6-7 questions.

Q1. Questions on HTML, CSS
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Q2. Permutations in string (Can you Backtracking approach). Always try to explain your approach
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Q3. Explain your Project?
Ans. 
Developed a web application for managing inventory and sales for a retail store.
• Used HTML, CSS, and JavaScript for front-end development.

• Implemented backend functionality using Node.js and MongoDB for database management.

• Incorporated user authentication and authorization features for secure access.

• Integrated payment gateway for online transactions.

• Utilized responsive design for mobile compatibility.
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Q1. Find duplicates in an array
Ans. 
Use a hash set to find duplicates in an array of strings.
• Create a hash set to store unique elements.

• Iterate through the array and check if the element is already in the hash set.

• If it is, then it is a duplicate. If not, add it to the hash set.
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Q2. Find single duplicate element in an array where contents of the array are length of array - 1
Ans. 
Find the single duplicate element in an array of strings with length n-1.
• Iterate through the array and use a HashSet to keep track of elements seen so far.

• If an element is already in the HashSet, that is the duplicate element.

• Return the duplicate element once found.
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Create a student support system

Q1. Design an order and payments system for an EdTech company
Ans. 
Design an order and payments system for an EdTech company
• Allow users to browse and select courses

• Implement a shopping cart for users to add courses

• Integrate payment gateways for secure transactions

• Provide order confirmation and receipt to users

• Allow users to track their order status
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3 questions in 3 hr, topics were Dp, Strings, Tree

1hr durations 40 questions, main topics were patterns, profit loss, work man , etc.

Q1. OOPS, JAVA, Mysql, general questsjons
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Data structure and algorithm, easy and medium questions