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MantraIT Interview Questions and Answers
MantraIT Interview Experiences
1 interview found
Interview Questionnaire
1 Question
- Q1. Questions from topics like Cursor, package, function,procedi
Software Developer Interview Questions asked at other Companies
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I appeared for an interview before Apr 2021.
(3 Questions)
Round duration - 90 minutes
Round difficulty - Medium
This round had 3 coding questions of Medium to Hard level of difficulty.
- Q1.
Balanced Parentheses Combinations
Given an integer
Nrepresenting the number of pairs of parentheses, find all the possible combinations of balanced parentheses using the given number of pairs.Explanati...
- Ans.
Generate all possible combinations of balanced parentheses for a given number of pairs.
Use recursion to generate all possible combinations of balanced parentheses.
Keep track of the number of open and close parentheses used in each combination.
Return the valid combinations as an array of strings.
- Q2.
Trapping Rain Water Problem Statement
You are given a long type array/list
ARRof sizeN, representing an elevation map. The valueARR[i]denotes the elevation of theithbar. Your task is to determine th... - Ans.
Calculate the total amount of rainwater that can be trapped between given elevations in an array.
Iterate through the array and calculate the maximum height on the left and right of each bar.
Calculate the amount of water that can be trapped at each bar by taking the minimum of the maximum heights on the left and right.
Sum up the trapped water at each bar to get the total trapped water for the entire array.
- Q3.
Rotting Oranges Problem Statement
You are given a grid containing oranges where each cell of the grid can contain one of the three integer values:
- 0 - representing an empty cell
- 1 - representing a fre...
- Ans.
Find the minimum time required to rot all fresh oranges adjacent to rotten oranges.
Create a queue to store the coordinates of rotten oranges and perform BFS to rot adjacent fresh oranges.
Track the time taken to rot all fresh oranges and return -1 if not all fresh oranges can be rotten.
Update the grid with the new state of oranges after each second.
Handle edge cases such as empty grid or no fresh oranges present.
Example...
(3 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
This was a standard DS/Algo round where I was given 2 questions to solve under 60 minutes. I was able to come up with the optimal approach for both the questions and then at the end of the interview I was also asked the famous Die Hard Water Puzzle.
- Q1.
Queue Using Stacks Implementation
Design a queue data structure following the FIFO (First In First Out) principle using only stack instances.
Explanation:
Your task is to complete predefined functions t...
- Ans.
Implement a queue using stacks following FIFO principle.
Use two stacks to simulate a queue.
For enQueue operation, push elements onto stack1.
For deQueue operation, if stack2 is empty, pop all elements from stack1 and push onto stack2, then pop from stack2.
For peek operation, if stack2 is empty, pop all elements from stack1 and push onto stack2, then return top of stack2.
For isEmpty operation, check if both stack1 and st...
- Q2.
Merge Intervals Problem Statement
You are provided with 'N' intervals, each containing two integers denoting the start time and end time of the interval.
Your task is to merge all overlapping intervals a...
- Ans.
Merge overlapping intervals and return sorted list of merged intervals by start time.
Sort the intervals based on start time.
Iterate through intervals and merge overlapping ones.
Return the merged intervals in sorted order.
- Q3. You have a 3-liter jar and a 5-liter jar. How can you measure exactly 4 liters using these two jars?
(4 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
This round had 2 coding questions - first one related to Binary Tree and the second one was a simple question from Bit Manipulation. This was followed by some questions from OOPS.
- Q1.
Binary Tree Diameter Problem Statement
You are given a Binary Tree, and you need to determine the length of the diameter of the tree.
The diameter of a binary tree is the length of the longest path betwe...
- Ans.
The task is to find the diameter of a binary tree, which is the length of the longest path between any two end nodes in the tree.
Traverse the tree to find the longest path between two nodes.
Keep track of the maximum diameter found during traversal.
The diameter may not necessarily pass through the root node.
Consider both left and right subtrees while calculating the diameter.
Example: For input 1 2 3 4 -1 5 6 -1 7 -1 -1
- Q2.
Power of 2 Problem Statement
Determine if it is possible to reorder the digits of a given integer 'N' such that the resulting number is a power of two. The leading digit must not be zero.
Input:
The fir... - Ans.
The problem involves determining if it is possible to reorder the digits of a given integer to form a power of 2.
Iterate through all possible permutations of the digits of the given integer.
Check if any of the permutations form a power of 2.
Return 1 if a valid permutation is found, else return 0.
- Q3. What are some advantages of using Object-Oriented Programming (OOP)?
- Ans.
Advantages of OOP include code reusability, modularity, and easier maintenance.
Code reusability: Objects can be reused in different parts of the program, reducing redundancy.
Modularity: OOP allows for breaking down complex problems into smaller, more manageable parts.
Easier maintenance: Changes to one part of the codebase do not necessarily affect other parts, making maintenance easier.
Encapsulation: Data hiding and ab...
- Q4. What are access specifiers and what is their significance in Object-Oriented Programming?
- Ans.
Access specifiers define the level of access to class members in Object-Oriented Programming.
Access specifiers include public, private, protected, and default
Public members are accessible from outside the class
Private members are only accessible within the class
Protected members are accessible within the class and its subclasses
Default access is when no access specifier is specified
(1 Question)
Round duration - 30 Minutes
Round difficulty - Easy
This was my last round and I hoped it to go good just like the other rounds. The interviewer was very straight to point
and professional. The interview lasted for 30 minutes.
- Q1. Why should we hire you?
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
Interview Questionnaire
8 Questions
- Q1. Implement queue with the help of two stacks
- Ans.
Queue can be implemented using two stacks by maintaining the order of elements in the stacks.
Create two stacks, let's call them stack1 and stack2
When an element is enqueued, push it to stack1
When an element is dequeued, pop all elements from stack1 and push them to stack2
Pop the top element from stack2 and return it as the dequeued element
If stack2 is empty, repeat step 3
To get the front element of the queue, peek the
- Q2. Iven a table “student” of with columns Name and Marks. You have to write a SQL query to get the 2nd highest marks from the table. Also write a query to find the nth highest marks, where n can be any number
- Q3. What is left join. Give example. And Full outer join?
- Ans.
Left join returns all records from left table and matching records from right table. Full outer join returns all records from both tables.
Left join is used to combine two tables based on a common column.
In left join, all records from the left table are returned along with matching records from the right table.
If there is no match in the right table, NULL values are returned.
Example: SELECT * FROM table1 LEFT JOIN table...
- Q4. What is magic functions and autoloading in PHP?
- Ans.
Magic functions are special methods in PHP that start with __. Autoloading is a way to automatically load classes.
Magic functions are used to handle certain events in PHP, such as object creation or property access.
Autoloading allows PHP to automatically load classes when they are needed, without requiring manual includes.
Magic functions can be used in conjunction with autoloading to dynamically load classes or handle
- Q5. Given three arrays sorted in non-decreasing order, print all common elements in these arrays. Examples: ar1[] = {1, 5, 10, 20, 40, 80} ar2[] = {6, 7, 20, 80, 100} ar3[] = {3, 4, 15, 20, 30, 70, 80, 120} Ou...
- Ans.
Given three sorted arrays, find common elements.
Create three pointers to traverse each array
Compare the elements at the pointers and move the pointer of the smallest element
If all pointers point to the same element, add it to the result and move all pointers
Repeat until any pointer reaches the end of its array
- Q6. A puzzle. You will be given with a 3 Litre container & a 7 Litre Container. Measure exactly 5 Litres of water
- Q7. Asked about one of my projects I mentioned in my resume?
- Q8. Find if a number is a power of 2 or not?
- Ans.
Check if a number is a power of 2 or not.
A power of 2 has only one bit set in its binary representation.
Use bitwise AND operator to check if the number is a power of 2.
If n is a power of 2, then n & (n-1) will be 0.
Interview Preparation Tips
College Name: na
Motivation: Overall it was a very good experience. They test you from every aspect. In the End I would like to say that Practo is one of the best companies to work for.
Skills evaluated in this interview
Software Developer Interview Questions & Answers
ABM Techno-Matrix Private Limited
Anonymous
posted on 17 Aug 2023
Selected
I applied via Referral and was interviewed before Aug 2022. There were 2 interview rounds.
(2 Questions)
- Q1. They asked about OPS, Data design and coding pattern
- Q2. About my coding pattern
Interview Preparation Tips
Senior Software Engineer Interview Questions & Answers
ABM Techno-Matrix Private Limited
Anonymous
posted on 17 Aug 2024
Selected
I applied via Approached by Company and was interviewed before Aug 2023. There were 2 interview rounds.
(2 Questions)
- Q1. What programming language are you most proficient?
- Ans.
I am most proficient in Java.
Extensive experience in developing applications using Java
Strong understanding of object-oriented programming principles
Familiarity with popular Java frameworks like Spring and Hibernate
- Q2. .NET, Angular and Sql Server
(1 Question)
- Q1. How would you design a system that needs to handle million of records
- Ans.
I would design a system using scalable architecture, efficient data storage, and optimized query processing.
Utilize a distributed database system like Cassandra or Hadoop for storing large volumes of data
Implement data partitioning and sharding to distribute the data across multiple servers
Use indexing and caching mechanisms to optimize query performance
Employ load balancing techniques to evenly distribute incoming req...
Interview Preparation Tips
Skills evaluated in this interview
Sales Executive Interview Questions & Answers
ABM Techno-Matrix Private Limited
Anonymous
posted on 17 Aug 2023
Selected
I applied via Walk-in and was interviewed before Aug 2022. There were 3 interview rounds.
(2 Questions)
- Q1. How Many years of experience you have
- Q2. 12 years of experience on the same field
(1 Question)
- Q1. My Expectation and my notice period
Interview Preparation Tips
Master Rinku Pal
Selected
I appeared for an interview before Feb 2024.
(10 Questions)
- Q1. What are the seven quality control tools, and can you provide explanations for each?
- Ans.
The seven quality control tools are essential for process improvement and problem-solving in engineering.
Check sheet: Used to collect and analyze data in a systematic way, such as tracking defects in a manufacturing process.
Pareto chart: Helps identify the most significant factors contributing to a problem by displaying them in descending order of frequency or impact.
Cause-and-effect diagram (Fishbone diagram): Visuali...
- Q2. 5S and visual management
- Q3. What are the seven steps of autonomous maintenance?
- Ans.
Autonomous maintenance is a key pillar of Total Productive Maintenance (TPM) and involves seven steps to empower operators to take care of their equipment.
Step 1: Initial Cleaning - Operators clean the equipment and surrounding area to identify abnormalities.
Step 2: Eliminate Sources of Contamination - Remove dirt, dust, and debris that can lead to breakdowns.
Step 3: General Inspection - Operators visually inspect the ...
- Q4. What are the calculations involved in Overall Equipment Effectiveness (OEE)?
- Ans.
OEE calculations involve Availability, Performance, and Quality factors to measure equipment efficiency.
Calculate Availability by dividing Operating Time by Planned Production Time.
Calculate Performance by dividing Actual Production by Maximum Possible Production.
Calculate Quality by dividing Good Units Produced by Total Units Started.
- Q5. Why is it mandatory for an organization to implement lean practices?
- Ans.
Implementing lean practices is mandatory for organizations to improve efficiency, reduce waste, and increase productivity.
Lean practices help organizations identify and eliminate waste in processes, leading to cost savings and improved efficiency.
By implementing lean practices, organizations can improve quality control and reduce defects in products or services.
Lean practices promote continuous improvement and empower ...
- Q6. How can downstream team members be motivated?
- Ans.
Downstream team members can be motivated through recognition, clear communication, opportunities for growth, and fostering a positive work environment.
Provide recognition for their hard work and achievements
Communicate clearly about goals, expectations, and feedback
Offer opportunities for growth and development, such as training or mentorship programs
Create a positive work environment through team-building activities a
- Q7. What is Pareto analysis and how is it applied in decision-making processes?
- Ans.
Pareto analysis is a technique used to identify the most important factors contributing to a problem or situation.
Pareto analysis is based on the Pareto Principle, also known as the 80/20 rule, which states that roughly 80% of effects come from 20% of causes.
It involves identifying and prioritizing the factors that have the most significant impact on a particular outcome.
By focusing on addressing the most critical fact...
- Q8. What is a Gemba walk, and how is it performed?
- Ans.
A Gemba walk is a Lean management technique where managers go to the actual workplace to observe operations and engage with employees.
Gemba walks involve observing processes, asking questions, and identifying opportunities for improvement.
Managers should focus on understanding the work being done and the challenges faced by employees.
Gemba walks help in building relationships with employees and fostering a culture of c...
- Q9. What are the steps involved in performing safety risk assessments?
- Ans.
Steps involved in performing safety risk assessments
Identify hazards and potential risks
Assess the likelihood and severity of each risk
Implement control measures to mitigate risks
Monitor and review the effectiveness of control measures
Document findings and recommendations
Communicate risks to relevant stakeholders
- Q10. Explain about TPM
- Ans.
TPM stands for Total Productive Maintenance, a proactive approach to maintenance that aims to maximize equipment effectiveness.
TPM focuses on preventing equipment breakdowns through regular maintenance and employee involvement.
It involves autonomous maintenance, planned maintenance, and focused improvement activities.
TPM aims to improve overall equipment effectiveness (OEE) by reducing downtime, improving quality, and ...
Selected
I applied via LinkedIn and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. Tell me about yourself
- Ans.
Experienced business analyst with a background in data analysis and process improvement.
Over 5 years of experience in analyzing business processes and identifying areas for improvement
Skilled in data analysis tools such as Excel, SQL, and Tableau
Strong communication and problem-solving skills
Led a project to streamline inventory management processes, resulting in a 20% reduction in costs
- Q2. Tell me about your roles and responsibilities
I appeared for an interview in Nov 2022.
Strong appitude knowledge is required.
(1 Question)
- Q1. String , arrays, oops
Interview Preparation Tips
(1 Question)
- Q1. Strecture of sql statement
- Ans.
SQL statements are used to interact with databases by performing operations like querying, updating, and deleting data.
SQL statements are made up of keywords like SELECT, INSERT, UPDATE, DELETE, etc.
They are structured in a specific order, with clauses like WHERE, ORDER BY, GROUP BY, etc.
Tables are referenced using their names, and conditions are specified to filter data.
Joins can be used to combine data from multiple
Skills evaluated in this interview
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