TOPS Technologies Trainee Interview Questions and Answers

Round duration - 20 Minutes
Round difficulty - Easy

very easy questions related to web development. 1 coding question

Q1. 
Clone a Linked List with Random Pointers
Given a linked list where each node has two pointers: the first points to the next node in the list, and the second is a random pointer that can point to any node ...read more
Ans. 
Create a deep copy of a linked list with random pointers without using references of original nodes.
• Iterate through the original linked list and create a new node for each node in the list.

• Store the mapping of original nodes to new nodes in a hashmap to handle random pointers.

• Update the random pointers of new nodes based on the mapping stored in the hashmap.

• Return the head of the copied linked list.
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Round duration - 150 Minutes
Round difficulty - Medium

Q1. 
Loot Houses Problem Statement
A thief is planning to steal from several houses along a street. Each house has a certain amount of money stashed. However, the thief cannot loot two adjacent houses. Determi...read more
Ans. 
Determine the maximum amount of money a thief can steal from houses without looting two consecutive houses.
• Create an array 'dp' to store the maximum money that can be stolen from each house without looting two consecutive houses.

• Iterate through the houses and update 'dp' based on the maximum money that can be stolen from the current house.

• Return the maximum value in 'dp' as the answer.
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Q2. Can you design a website similar to Amazon?
Ans. 
Yes, I can design a website similar to Amazon by focusing on user-friendly interface, robust search functionality, secure payment options, and personalized recommendations.
• Focus on user-friendly interface with easy navigation

• Implement robust search functionality with filters and sorting options

• Provide secure payment options with encryption and fraud protection

• Include personalized recommendations based on user behavior
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Round duration - 10 Minutes
Round difficulty - Easy

Q1. What is str in c
Ans. 
str in C is a data type used to represent strings as arrays of characters.
• str in C is typically declared as an array of characters, terminated by a null character '\0'.

• Functions like strcpy(), strcmp(), and strlen() are commonly used with str in C.

• Example: char str[10] = "hello"; // Declaration of a string in C
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Q2. What is pointers in c
Ans. 
Pointers in C are variables that store memory addresses of other variables.
• Pointers are used to access and manipulate memory directly.

• They are denoted by an asterisk (*) before the variable name.

• Example: int *ptr; // declares a pointer to an integer variable
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Questions in aptitude section was easy and would require good analytical and quantitative skills.

Total 10 questions
6 debugging question
4 easy-medium level coding questions (2 Marks + 3 Marks + 3 Marks + 3 Marks)

Q1. OOPs, Project, SQL Queries, Puzzle/Apptitude
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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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Good experience question was tricky but you will able to crack it

Q1. What is js in java
Ans. 
JS in Java refers to JavaScript, a scripting language commonly used for web development.
• JavaScript is a high-level, interpreted programming language.

• It is commonly used for client-side web development.

• JS can be embedded in HTML pages to add interactivity.

• It is not the same as Java, which is a separate programming language.
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1st round
25 mcq apptitude + 10 DSA question

Q1. Project review , opps, sql
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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. 
Iterate through array to find 2nd largest element
• Iterate through array and keep track of largest and second largest elements

• Handle edge cases like empty array or array with less than 2 elements

• Example: ['3', '5', '2', '7', '1'] should return '5'
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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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Basic Aptitude test followed by 2 coding questions. Test was very easy.

This was pen and paper coding test, where we were given 20 questions and we had to write code on paper. Total time was 2-3 hr.

Q1. Technical Interview, 2 coding questions asked, 1 math question and Basics like OOP, Language specific, etc.
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