Cartrade.com Associate Software Engineer Interview Questions and Answers

Q1. Center div using 3 approaches
Ans. 
Three approaches to center a div element
• Using CSS flexbox: set display property of parent element to flex and justify-content to center

• Using CSS grid: set display property of parent element to grid and place the div in the center grid area

• Using margin: set margin property of the div to auto
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Q2. Display use of setTimeout
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setTimeout is a function in JavaScript used to execute a function after a specified amount of time.
• setTimeout(function, milliseconds) is used to delay the execution of a function by a specified number of milliseconds.

• Example: setTimeout(() => { console.log('Hello, world!'); }, 2000) will log 'Hello, world!' after 2 seconds.
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Asked me to create a carousel component

The test consisted of 4 DSA questions (1 easy, 2 medium, 1 hard) that had to be completed in 2 hours. They were standard questions from Leetcode and the test was similar to Leetcode's weekly coding contest.

Q1. Simple DSA questions like time complexity to insert in a Hash Map, the difference between singly and doubly linked lists, etc.
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Q2. Subarray with sum 0
Ans. 
Find subarray in an array with sum 0
• Iterate through the array and keep track of the running sum

• Store the running sum in a hashmap and check if the same sum has been seen before

• If the sum is 0 or if the running sum is already in the hashmap, a subarray with sum 0 exists
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Q3. Linked List Cycle
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Q4. Rainwater trapping proble
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Q1. Design a database for a blogging website
Ans. 
Database design for a blogging website
• Create tables for users, blog posts, comments, and categories

• Use primary and foreign keys to establish relationships between tables

• Include fields such as title, content, author, date, and tags

• Implement indexing for faster retrieval of data

• Consider implementing a caching mechanism for improved performance
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Q2. What can be done to balance the load of requests coming to a single server
Ans. 
To balance the load of requests on a single server, one can implement load balancing techniques.
• Implementing a load balancer to distribute incoming requests evenly across multiple servers

• Using round-robin algorithm to route requests to different servers in a sequential manner

• Utilizing server health checks to monitor the performance of each server and adjust the load distribution accordingly
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Q1. Design database for my college
Ans. 
Design a database for a college
• Create tables for students, courses, professors, departments, and grades

• Establish relationships between tables using foreign keys

• Include attributes such as student ID, course ID, professor ID, department ID, and grade

• Consider normalization to reduce redundancy and improve data integrity
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Q2. Pseudo code to validate password
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Pseudo code to validate password
• Create a function that takes a password as input

• Check if the password meets the required criteria (e.g. length, special characters)

• Return true if the password is valid, false otherwise
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Q3. Strengths and weakness that can affect my profesional life
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Q4. Challenges faced during the projects in my resum and how did I overcome them
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5 questions of medium difficulty level covering topics like queue, dynamic programming, binary search, greedy.

Q1. System design. Using a NoSQL document schema. Design a document store schema to store bike model data.
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Q1. Willing to relocate to Navi Mumbai. Strengths and weekness General process related to my compatibility with the company.
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Q1. 1) Explain your Project. 2) Basics of Java(OOPS). 3) Few situational based questions.
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It was an online assessment. Some coding questions. Some cs fundamental mcqs. SQL query, Rest Api question.

An assignment to create a game using nodejs/ go lang/ java.

Q1. Discussion related to Assignment. Told some changes and told to add some more functionalities.
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Q2. Some APIS were given. It was case study. You had to show the dishes to a customer according to his preferences.
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Q1. How does recyclerview works internally ?
Ans. 
RecyclerView is a flexible view for providing a limited window into a large data set.
• RecyclerView recycles views to improve performance and memory usage.

• It uses LayoutManager to organize items in a grid, list, or staggered grid layout.

• Adapter provides data to be displayed in RecyclerView.

• ItemDecoration can be used to add spacing between items or decorations to items.

• ItemAnimator can be used to animate item changes in t
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Q2. Android basics , Live Data , ViewModel, coroutines internal working
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Q1. BookMyShow low level design
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Q2. Heap data structures question
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