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Dassault Systemes Research and Development Associate Interview Questions, Process, and Tips
Dassault Systemes Research and Development Associate Interview Experiences
1 interview found
I applied via Referral and was interviewed before Sep 2021. There were 2 interview rounds.
(5 Questions)
- Q1. Questions on OOPS, Geometry, Puzzles, Basic Maths, Geometry Algorithms
- Q2. Order of Constructor and Destructors called
- Ans.
Constructors are called in order of inheritance, while destructors are called in reverse order.
Constructors are called when an object is created.
Destructors are called when an object is destroyed.
Inheritance affects the order of constructor calls.
Destructors are called in reverse order of constructors.
- Q3. Friends class usage in C++
- Ans.
The Friends class in C++ allows access to private and protected members of a class by other classes.
The Friends class is declared inside the class that needs to grant access to its private/protected members.
The Friends class can be a friend of multiple classes.
Example: class A { friend class B; }; class B { friend class C; };
Example: class A { friend void B::function(); }; class B { void function() { //access A's priva
- Q4. Determining if a point lies inside, on or outside a circle.
- Ans.
To determine if a point lies inside, on or outside a circle, we need to calculate the distance between the point and the center of the circle.
Calculate the distance between the point and the center of the circle using the distance formula
If the distance is greater than the radius of the circle, the point is outside the circle
If the distance is equal to the radius of the circle, the point is on the circle
If the distance...
- Q5. Ant and its travel along a cube.
(1 Question)
- Q1. Basic Puzzles, General Questions, Unless you make a mistake, you are selected
Interview Preparation Tips
Skills evaluated in this interview
Interview questions from similar companies
Anonymous
Interview Questionnaire
2 Questions
- Q1. PATTERN PROBLEMS
- Q2. CALCULATION OF CHILDREN AND GRANDCHILDREN
- Ans.
Calculate the number of children and grandchildren
Count the number of direct children of a person
Count the number of grandchildren of a person
Use recursion to count all descendants
Consider only living descendants
Exclude step-children and adopted children
Interview Preparation Tips
Practice
Interview Questionnaire
1 Question
- Q1. Simple basic c programing questions
I appeared for an interview before May 2021.
(3 Questions)
Round duration - 90 minutes
Round difficulty - Medium
- Q1.
Longest Increasing Subsequence Problem Statement
Given 'N' students standing in a row with specific heights, your task is to find the length of the longest strictly increasing subsequence of their heights...
- Ans.
Find the length of the longest strictly increasing subsequence of heights of students in a row.
Iterate through the heights array and for each element, find the length of the longest increasing subsequence ending at that element.
Use dynamic programming to keep track of the longest increasing subsequence length for each element.
Return the maximum length found as the result.
- Q2.
Overlapping Intervals Problem Statement
You are given the start and end times of 'N' intervals. Write a function to determine if any two intervals overlap.
Note:
If an interval ends at time T and anothe...
- Ans.
Given start and end times of intervals, determine if any two intervals overlap.
Iterate through intervals and check if any two intervals overlap by comparing their start and end times
Sort intervals based on start times for efficient comparison
Consider edge cases where intervals end and start at the same time
- Q3. What SQL queries were asked during your interview?
- Ans.
Various SQL queries related to data manipulation and retrieval were asked during the interview.
Basic SELECT queries to retrieve data from a single table
JOIN queries to retrieve data from multiple tables based on a common column
Aggregate functions like COUNT, SUM, AVG, etc. to perform calculations on data
Subqueries to retrieve data based on the result of another query
UPDATE queries to modify existing data in a table
DELE...
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
- Q1.
Zig-Zag String Problem Statement
Given a string
STRof sizeNand an integerMrepresenting the number of rows in the zig-zag pattern, return the string formed by concatenating all rows when the stringST... - Ans.
Arrange a string in zig-zag pattern with given number of rows and concatenate the rows.
Iterate through the string and distribute characters to rows based on zig-zag pattern
Concatenate the characters in each row to get the final result
Handle edge cases like when number of rows is 1 or equal to the length of the string
- Q2.
Next Permutation Problem Statement
You are given a permutation of 'N' integers. A sequence of 'N' integers is considered a permutation if it includes all integers from 1 to 'N' exactly once. Your task is ...
- Ans.
The task is to rearrange a given permutation of 'N' integers to form the lexicographically next greater permutation.
Iterate from right to left to find the first element that is smaller than the element to its right.
Swap this element with the smallest element to its right that is greater than it.
Reverse the elements to the right of the swapped element to get the lexicographically next greater permutation.
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
- Q1.
Remove Consecutive Duplicates Problem Statement
Given a string S, your task is to recursively remove all consecutive duplicate characters from the string.
Input:
String S
Output:
Output string
Constr...
- Ans.
Recursively remove consecutive duplicate characters from a string.
Use recursion to check if the current character is the same as the next character, if so skip the next character
Base case: if the string is empty or has only one character, return the string
Example: Input: 'aaabcc', Output: 'abc'
- Q2.
Print Permutations - String Problem Statement
Given an input string 'S', you are tasked with finding and returning all possible permutations of the input string.
Input:
The first and only line of input ...
- Ans.
Return all possible permutations of a given input string.
Use recursion to generate all possible permutations of the input string.
Swap characters at different positions to generate permutations.
Handle duplicate characters in the input string by using a set to store unique permutations.
(1 Question)
Round duration - 60 Minutes
Round difficulty - Medium
- Q1. Design an e-commerce website similar to Flipkart or Amazon.
- Ans.
Design an e-commerce website similar to Flipkart or Amazon.
Implement user-friendly interface for easy navigation
Include search functionality with filters for products
Incorporate secure payment gateway for transactions
Provide personalized recommendations based on user behavior
Include customer reviews and ratings for products
Implement order tracking and delivery status updates
Offer various payment options like credit/deb
Interview Preparation Tips
Tip 1 : Prepare DSA well. Standard Leetcode-type questions will be asked.
Tip 2 : You should be crystal clear about your project/s as any question would be asked and you should be able to answer it.
Tip 3 : Prepare CS fundaments like OS, OOPs, DBMS, etc.
Tip 1 : Clearly mention the tech. stack you have worked on in the project/s
Tip 2 : As a fresher, you should add your coding profiles on CodeChef, Codeforces, etc. so as to make the resume shortlisting easy
Skills evaluated in this interview
I appeared for an interview before Jan 2021.
(2 Questions)
Round duration - 120 Minutes
Round difficulty - Medium
The test included MCQ questions from SQL, Linux Commands, C/C++ programming, Logical Reasoning, Aptitude questions. The other section was the coding round, where 2 SQL queries and 2 coding questions were there.
- Q1.
Subarray with Equal Occurrences Problem Statement
You are provided with an array/list
ARRof lengthNcontaining only 0s and 1s. Your goal is to determine the number of non-empty subarrays where the numbe... - Ans.
Count the number of subarrays where the number of 0s is equal to the number of 1s in a given array of 0s and 1s.
Iterate through the array and keep track of the count of 0s and 1s encountered so far.
Use a hashmap to store the count of 0s and 1s encountered at each index.
For each index, check if the count of 0s is equal to the count of 1s encountered so far and update the result accordingly.
- Q2.
Pythagorean Triplets Detection
Determine if an array contains a Pythagorean triplet by checking whether there are three integers x, y, and z such that x2 + y2 = z2 within the array.
Input:
The first lin... - Ans.
Detect if an array contains a Pythagorean triplet by checking if there are three integers x, y, and z such that x^2 + y^2 = z^2.
Iterate through all possible triplets of numbers in the array and check if they form a Pythagorean triplet.
Use a nested loop to generate all possible combinations of three numbers from the array.
Check if the sum of squares of two numbers is equal to the square of the third number for each trip...
(3 Questions)
Round duration - 50 Minutes
Round difficulty - Medium
This was a standard DSA round where I was asked to solve 2 questions and also code it in a production ready manner . At the end I was also asked some questions related to Linux and SQL . I was tested on some basic commands of Linux .
- Q1.
Palindromic Substrings Problem Statement
Given a string
S, your task is to return all distinct palindromic substrings of the given string in alphabetical order.Explanation:
A string is considered a pal...
- Ans.
Return all distinct palindromic substrings of a given string in alphabetical order.
Iterate through all possible substrings of the given string.
Check if each substring is a palindrome.
Store distinct palindromic substrings in alphabetical order.
- Q2.
Swap Two Numbers Problem Statement
Given two integers
aandb, your task is to swap these numbers and output the swapped values.Input:
The first line contains a single integer 't', representing the num... - Ans.
Swap two integers 'a' and 'b' and output the swapped values.
Create a temporary variable to store one of the integers before swapping.
Swap the values of 'a' and 'b' using the temporary variable.
Output the swapped values of 'a' and 'b'.
- Q3. What is meant by normalization and denormalization?
- Ans.
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity, while denormalization is the process of intentionally adding redundancy to improve query performance.
Normalization involves breaking down a table into smaller tables and defining relationships between them to reduce redundancy and dependency.
Denormalization involves combining tables or adding redundant data to...
(3 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
This was a DS/Algo + Core round where I was asked questions related to DBMS , SQL queries and Linux Commands . The first question was of DSA and I was able to code it preety fast . I was also asked to execute some SQL queries on my laptop.
Overall , this round went good according to my opinion.
- Q1.
Anagram Pairs Verification Problem
Your task is to determine if two given strings are anagrams of each other. Two strings are considered anagrams if you can rearrange the letters of one string to form the...
- Ans.
Check if two strings are anagrams of each other by comparing their sorted characters.
Sort the characters of both strings and compare them.
Use a dictionary to count the frequency of characters in each string and compare the dictionaries.
Ensure both strings have the same length before proceeding with comparison.
Handle edge cases like empty strings or strings with different lengths.
- Q2. How would you delete duplicate emails from a database using SQL?
- Ans.
Use SQL query with GROUP BY and HAVING clause to delete duplicate emails from a database.
Use GROUP BY clause to group emails together
Use HAVING clause to filter out groups with more than one email
Use DELETE statement to remove duplicate emails
- Q3. What is the difference between the DELETE and TRUNCATE commands in a DBMS?
- Ans.
DELETE removes specific rows from a table, while TRUNCATE removes all rows and resets auto-increment values.
DELETE is a DML command, while TRUNCATE is a DDL command.
DELETE can be rolled back, while TRUNCATE cannot be rolled back.
DELETE triggers ON DELETE triggers, while TRUNCATE does not trigger any triggers.
DELETE is slower as it maintains logs, while TRUNCATE is faster as it does not maintain logs.
Example: DELETE FRO...
(2 Questions)
Round duration - 30 Minutes
Round difficulty - Easy
This was a typical HR round with some standard Behavioral questions .
- Q1. What is something about you that is not included in your resume?
- Q2. Why do you want to work at Amdocs?
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
16 Questions
- Q1. Simple linked list questions-find middle element,given a pointer to second last element delete it
- Q2. Explain insertion sort,quicksort
- Ans.
Insertion sort and quicksort are sorting algorithms used to sort arrays of data.
Insertion sort: iterates through the array and inserts each element into its proper position.
Quicksort: selects a pivot element and partitions the array into two sub-arrays, one with elements less than the pivot and one with elements greater than the pivot.
Insertion sort is best for small arrays, while quicksort is best for large arrays.
Bot...
- Q3. Concept of virtual destructors,runtime polymorphism
- Q4. Test cases for an installation software like check if sufficient memory available,check for a previous version,check to undo all the changes made to the system while quitting the installation. 5.2 puzzles
- Q5. Merge two sorted linked lists using recursion
- Ans.
Merge two sorted linked lists using recursion
Create a recursive function that compares the first nodes of both lists
Set the smaller node as the head of the merged list and call the function again with the next node of the smaller list
Base case: if one list is empty, return the other list
Return the merged list
- Q6. Given an integer(consider 4 bytes) find which byte is zero
- Ans.
Given an integer, determine which byte is zero.
Convert the integer to a byte array using bitwise operations.
Iterate through the byte array and check for a zero value.
Return the index of the zero byte.
Consider endianness when converting to byte array.
- Q7. Program to check whether your machine is little endian or big endian
- Ans.
To check endianness, create a 4-byte integer with a known value and check the byte order.
Create a 4-byte integer with a known value
Check the value of the first byte to determine endianness
If the first byte is the least significant, the machine is little endian
If the first byte is the most significant, the machine is big endian
- Q8. Print something before execution of main()(use static objects)
- Ans.
Static objects can be used to print something before main() execution.
Static objects are initialized before main() execution
They can be used to print something before main()
Example: static int x = printf("Hello World!");
Output: Hello World! will be printed before main() execution
- Q9. Memory allocation for static varibles(when,which segment etc)
- Ans.
Static variables are allocated memory in the data segment of the program's memory space.
Static variables have a fixed memory location throughout the program's execution.
They are initialized to zero by default.
If initialized explicitly, they are stored in the data segment.
Static variables can be accessed by any function in the program.
- Q10. Find space and time complexity for a recursive function(he wrote it)
- Ans.
Finding space and time complexity of a recursive function.
Space complexity is the amount of memory used by the function.
Time complexity is the amount of time taken by the function to execute.
Recursive functions have higher space complexity due to the call stack.
Time complexity can be calculated using Big O notation.
Examples of recursive functions include factorial and Fibonacci sequence.
- Q11. Some questions on major project
- Q12. Preprocessor directives,volatile keyword
- Q13. Virtual pointer table,operator overloading,friend functions,semaphores
- Q14. Diamond heirarchy problem
- Ans.
Diamond hierarchy problem is a problem in object-oriented programming where a class inherits from multiple classes in a diamond-shaped hierarchy.
Occurs when a class inherits from two classes that share a common base class
Can lead to ambiguity in method calls and data members
Solved using virtual inheritance or by using interfaces
- Q15. Fibonacci series.(:P)
- Q16. Puzzle
Interview Preparation Tips
Experience: 1. Aptitude-Mostly caselets on ordering and some easy quant questions.
2. c/c++-No objective questions.Mostly on basics(function pointers,give output of string based codes).Some simple progams(Find smallest of three numbers using conditional operators.gcd using recursion)
3.Data Structures-LCA for BST,2's compliment,reverse a doubly linked list.
College Name: NA
Skills evaluated in this interview
Interview Questionnaire
20 Questions
- Q1. He asked me my specialization?
- Q2. Why not further studies? (He had noted that I was third in my batch. He appeared impressed by that
- Q3. He asked me to tell him about my favorite project
- Q4. He then looked at my grades. He commented that my lowest grade – B- was in Digital Image Processing. I just looked at him like a doofus thinking of what to say. But he quickly added, ‘don’t worry, it happe...
- Q5. He then asked me a question that had been asked in Round 4, written test:Describe an optimal algorithm to find the second minimum number in an array of numbers. What is the exact number of comparisons requ...
- Q6. Given a polygon (could be regular, irregular, convex, concave), find out whether a particular point lies inside it or outside it
- Ans.
To determine if a point is inside a polygon, use the ray casting algorithm.
Create a line from the point to a point outside the polygon
Count the number of times the line intersects with the polygon edges
If the count is odd, the point is inside the polygon; otherwise, it is outside
- Q7. He asked me to explain Canny’s algorithm to him. (this was because my DIP project was related to this)
- Q8. Then, he gave me a practical problem to solve: Suppose you are given an image which contains some text and some photos. How do you find the location of the image?
- Q9. Which are the four storage classes in C
- Ans.
The four storage classes in C are auto, register, static, and extern.
Auto: default storage class for all local variables
Register: used to define local variables that should be stored in a register instead of RAM
Static: used to define local variables that retain their value between function calls
Extern: used to declare a global variable that is defined in another file
- Q10. Given a program: int i; int main() { int j; int *k = (int *) malloc (sizeof(int)); … } Where are each of these variables stored?
- Ans.
i is stored in global data segment, j is stored in stack, k is stored in heap.
i is a global variable and is stored in the global data segment
j is a local variable and is stored in the stack
k is a pointer variable and is stored in the stack, while the memory it points to is allocated on the heap using malloc()
- Q11. Question on polymorphisms
- Q12. He again went back to the first question he had asked me. Once again
- Q13. Then he wrote out some code and asked me how the compiler will generate code for it. I gave some answer, but he was clearly not satisfied. I thought it was all over by then. Then, he asked me a DIP quest...
- Q14. Given a set of words one after another, give me a data structure so that you’ll know whether a word has appeared already or not
- Ans.
Use a hash table to store the words and check for existence in constant time.
Create a hash table with the words as keys and a boolean value as the value.
For each new word, check if it exists in the hash table. If it does, it has appeared before. If not, add it to the hash table.
Alternatively, use a set data structure to store only the unique words and check for existence in the set.
- Q15. He asked me some questions on Interprocess Communication: What’s a semaphore? How are they used? He would often pick out words from my answers and ask me what they meant. He wanted to make sure that I rea...
- Q16. He then asked me some DB fundas. Transaction. Serializability, Consistent state, etc
- Q17. Finally, he asked me whether I had any questions
- Q18. There is a clock at the bottom of the hill and a clock at the top of the hill. The clock at the bottom of the hill works fine but the clock at the top doesn’t. How will you synchronize the two clocks. Obv...
- Q19. There was one more puzzle.. I don’t remember it. but I do remember that we started discussing ways of generating large prime numbers
- Q20. We also talked a bit about my phone browser project
Interview Preparation Tips
Duration: 15 minutes
Total Questions: 1
Round: Test
Duration: 30 minutes
Total Questions: 2
Round: Test
Duration: 30 minutes
Total Questions: 3
Round: Test
Total Questions: 4
Round: Technical Interview
Experience: 1.When I told him that I had none as I didn’t want to specialize in this stage, he was a little surprised but appeared satisfied with my reason.2.I told him that my profile clearly indicated that I’ve been trying to get into the industry via internships, industry-funded projects right from second year, second sem. I said that I was fully sure that I didn’t want to do MS anytime soon.3.I told him about the web-browser that I had developed for cell-phones. I thought that was the only project which was closest to what Adobe was working on. He appeared satisfied with my answers.4. So people, be fully prepared to explain any anomalous grades. I was prepared with the explanation of the W in the my grade-sheet but not of the B- in DIP. I know that this is really stupid considering that I was interviewing with Adobe. Don’t make this mistake.5.I screwed up, big time in this question. I had superficially discussed this question with my friend a while ago and he had outlined an algorithm which I thought that I had understood, but I hadn’t. I started off explaining it but got stuck in the middle. He sternly told me to read it up again. One solution that I could tell him, and which I had written in the test was this Use two variables – min and second min. Initialize them by comparing the first two elements of the array. This is (1) comparison. Then, go through the entire array, from index 2 to n-1 comparing each element, first with min and then with second min, updating each variable as necessary. This will involve a worst case of two comparisons for each element. Therefore, total number of comparisons = 2*(n-2) + 1 = 2*n – 3 comparisons.I’ll try to update this with a better solution, sometime soon.6.This is an easy, straight question from graphics. You shoot a ray parallel to the x-axis passing through this point. Start with odd parity. Change parity of ray each time it intersects an edge of the polygon (consider special case of when the line passes through a vertex of the polygon. Change parity only if it passes through a vertex which has one edge above it and one edge below the ray). If the parity of ray is even when it passes through the point, it is inside the polygon, else it is not.7.This is simple. Study DIP8.I gave various alternatives – from searching for RGB components, to using OCR.. he didn’t appear fully satisfied. I think he was looking for edge-detection, but that would fail, if the text contained tables, etc.
Round: Technical Interview
Experience: He was friendly at the start but this interview was my worst. He asked me my favorite subject. I said that it was Programming. (He laughed at that)
1. static, extern, register, auto2.I started off correctly, but he was able to confuse me. He brought in shared libraries, static libraries fundas into the discussion. We had a discussion for about twenty-minutes on this. Finally, he was happy with one of my answers because I had deduced which policy made sense and answered correctly. He said that out of all the people interviewed so far (I was second last), nobody had been able to answer all of these questions correctly.3.this is easy – get it from any C++ book. He tried to confuse me again, but this time I was ready and he was finally satisfied.Then he looked at my grades and said that out of all your grades, you have only two Bs and one of them is in Compilers. Why? (Damn it. three non-A grades and that’s all they ask about. What’s wrong with this world?!)Didn’t you like Compilers? “Not in particular”, I replied. “Fine. Now, I HAVE to ask you questions on compilers”, he said.4.He again went back to the first question he had asked me. Once again5.I first suggested that we capture only a small portion of the board. To locate that portion, we could search for the chalk in the prof’s hand – of course, taking care that it had the blackboard in the background (no point capturing a video of the prof scratching his chin, na?). Further, if the prof was writing only text, we could convert the video into text by OCR and then transmitting. Simple diagrams could also be reduced to a set of vector-graphics instructions (we rarely, see the prof shading stuff). I think he liked my approach, but was not completely satisfied. Anyway, we left it at that and went forward.6.I suggested various alternatives. but he kept helping me and finally, we came up with an array of pointers to 26-trees (each node of the tree has 26 children). Store every word as a path from the root to a leaf with pointers in the correct places. For example, hello would be stored as – pointer from ‘h’ index of the root array to a node which had a pointer from ‘e’ index of it’s array to a node which had a pointer from ‘l’ index of the array.. and so on. This is both time and space efficient.7.I was able to answer all his questions, but I made the mistake of telling him, when we started off that I didn’t know much about this subject as I had done it a long time ago. He was very annoyed at that, apparently because a lot of people before me had said this.8.I was able to answer all of them. I stumbled around a bit in a few questions where I was explaining correctly, but not using the keywords that he was looking for.9.I thought that I should say something to make him realize that I was not completely stupid and so asked him whether there was any logic to the order in which the short-listed candidates were called. This turned out to be a dumb move. The order was alphabetic and he sent me off with a parting shot, saying “You guys do pattern recognition and stuff and still you can’t recognize such a simple pattern” Me and my big mouth! Moral of the story: Don’t ask questions for the sake of asking.
Round: Puzzle Interview
Experience: After the first two interviews, this one was like having a warm batch after being cold and wet for days! I did well in this one.1.You have to go up the hill and come back, with horse, without horse, getting four equations to solve four unknowns – time to go uphill – with horse, without horse, time to go downhill – with horse, without horse. Then you can go up the hill and set the clock to ‘(time when you left) + (time to go uphill with horse)’2. I told him the funda of Mersenee primes (luckily remembered it) and he was decently impressed.
General Tips: Finally hired by Adobe. Special thanks to AmbitionBox team. Really amazing site for sharing experience. That’s all for the Adobe. They are focusing on your approach and your coding skills. All the best.
Skills: Algorithm, Data structure, C++, C, DIP
College Name: BIT Mesra
Skills evaluated in this interview
Interview Questionnaire
12 Questions
- Q1. Given a binary tree and an integer x, return whether the binary tree has a path from root to a leaf whose values sum to x
- Q2. Gievn a binary tree and return all root to leaf node pathss row,col and value
- Ans.
Return all root to leaf node paths in a binary tree with row, col and value.
Traverse the binary tree recursively and keep track of the current path.
When a leaf node is reached, add the path to the result array.
Include row, col and value of each node in the path.
Use an array of strings to store the paths.
- Q3. He then asked me to give test cases for testing this program
- Q4. Given two unsorted arrays of numbers and asked me to find the intersection
- Q5. GetMax() function for a stack in O(1)
- Ans.
To get max value from a stack in O(1), maintain a separate stack to keep track of maximum values.
Create a separate stack to keep track of maximum values
Push the maximum value onto the stack whenever a new maximum is encountered
Pop the maximum value stack whenever the top element of the main stack is popped
Return the top element of the maximum value stack to get the maximum value in O(1)
- Q6. GetMax() function for a queue in O(1)
- Ans.
To get max element from a queue in O(1) time complexity
Maintain a separate variable to keep track of the maximum element in the queue
Update the maximum element variable whenever a new element is added or removed from the queue
Return the maximum element variable when getMax() function is called
- Q7. Given an array in which consecutive elements differ by 1, i.e. a[i] – a[i + 1] = 1 or -1, and an element x, find the element in the array
- Q8. Given an array, find the Next Greatest Element to the right for each element
- Ans.
Find the Next Greatest Element to the right for each element in an array of strings.
Iterate through the array from right to left
Use a stack to keep track of elements
Pop elements from stack until a greater element is found
If no greater element is found, assign -1
Return the result array
- Q9. Given an expression, remove unnecessary parenthesis. For example if (((a + b)) * c) is given make it (a + b) * c, as it evaluates in the same way without those parenthesis also
- Ans.
To remove unnecessary parenthesis from an expression, we need to apply a set of rules to identify and eliminate them.
Identify and remove parenthesis around single variables or constants
Identify and remove parenthesis around expressions with only one operator
Identify and remove parenthesis around expressions with operators of equal precedence
Identify and remove parenthesis around expressions with operators of different ...
- Q10. Given an array of integers, find the maximum product which can be formed by three numbers
- Ans.
Find the maximum product of three integers in an array.
Sort the array in descending order.
Check the product of the first three numbers and the product of the first and last two numbers.
Return the maximum of the two products.
- Q11. Given an array of integers, find the length of the longest consecutive sub array which forms an AP
- Ans.
Find length of longest consecutive sub array forming an AP from given array of integers.
Sort the array in ascending order
Iterate through the array and find the longest consecutive sub array forming an AP
Use a variable to keep track of the length of the current consecutive sub array forming an AP
Use another variable to keep track of the length of the longest consecutive sub array forming an AP seen so far
- Q12. Given a binary tree, connect all the nodes at the same level. Each node will have a next pointer; you have to make it point to the next node to its right in the same level. If there is no such node, make ...
Interview Preparation Tips
College Name: NA
Skills evaluated in this interview
I appeared for an interview before Jan 2021.
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
The interviewer asked me 2 questions related to DS/Algo in this round . Both the questions were of Easy-Medium difficulty and I was also required to code them in a production ready manner.
- Q1.
Maximum Sum Path in a Binary Tree Problem Statement
You are provided with a binary tree consisting of
Nnodes where each node has an integer value. The task is to determine the maximum sum achievable by a... - Ans.
Find the maximum sum achievable by a simple path between any two nodes in a binary tree.
Traverse the binary tree to find all possible paths and calculate their sums.
Keep track of the maximum sum encountered during traversal.
Consider paths that may include the same node twice.
Implement a recursive function to explore all possible paths.
Handle cases where nodes have negative values.
- Q2.
Intersection of Two Arrays Problem Statement
Given two arrays
AandBwith sizesNandMrespectively, both sorted in non-decreasing order, determine their intersection.The intersection of two arrays in...
- Ans.
The problem involves finding the intersection of two sorted arrays efficiently.
Use two pointers to iterate through both arrays simultaneously.
Compare elements at the pointers and move the pointers accordingly.
Handle cases where elements are equal, and update the intersection array.
Return the intersection array as the result.
(3 Questions)
Round duration - 50 Minutes
Round difficulty - Medium
This round had 2 questions of DS/Algo to solve under 50 minutes and one question related to Operating Systems.
- Q1.
Next Greater Element Problem Statement
You are provided with an array or list
ARRcontainingNpositive integers. Your task is to determine the Next Greater Element (NGE) for each element in the array.T...
- Ans.
Find the Next Greater Element for each element in an array.
Iterate through the array from right to left
Use a stack to keep track of elements with no greater element to the right
Pop elements from the stack until finding a greater element or stack is empty
- Q2.
Number In Arithmetic Progression Problem
Given three integers
X,C, andY, whereXis the first term of an arithmetic sequence with a common difference ofC, determine ifYis part of this arithmetic sequ... - Ans.
Check if a given number is part of an arithmetic sequence with a given first term and common difference.
Calculate the arithmetic sequence using the formula: nth term = X + (n-1) * C
Check if Y is equal to any term in the sequence to determine if it belongs to the sequence
Return 'True' if Y belongs to the sequence, otherwise return 'False'
- Q3. Can you define process and threads in operating systems?
- Ans.
Processes are instances of programs in execution, while threads are smaller units within a process that can execute independently.
A process is a program in execution, consisting of code, data, and resources.
Threads are smaller units within a process that can execute independently.
Processes have their own memory space, while threads share the same memory space within a process.
Processes are heavyweight, while threads ar...
(3 Questions)
Round duration - 50 Minutes
Round difficulty - Medium
This round had 2 questions of DSA of Easy-Medium difficulty and at the end I was asked a Puzzle to check my general problem solving ability.
- Q1.
Max Product Subset Problem Statement
Given an array/list
arrof sizen, determine the maximum product possible by taking any subset of the array/listarr. Return the result modulo10^9+7since the product ... - Ans.
Find the maximum product of a subset of an array modulo 10^9+7.
Iterate through the array and keep track of the maximum positive product and minimum negative product encountered so far.
Handle cases where the array contains zeros separately.
Return the maximum product modulo 10^9+7.
- Q2.
Populating Next Right Pointers in Each Node
Given a complete binary tree with 'N' nodes, your task is to determine the 'next' node immediately to the right in level order for each node in the given tree.
... - Ans.
Implement a function to update 'next' pointers in a complete binary tree.
Iterate level by level using a queue
Connect nodes at each level using 'next' pointers
Handle null nodes appropriately
Ensure the tree is a complete binary tree
- Q3. You have two wires of different lengths that are both capable of burning for exactly one hour when ignited at both ends. How can you measure a time interval of 45 minutes using these two wires?
(2 Questions)
Round duration - 50 Minutes
Round difficulty - Medium
This round consisted of 2 questions from DSA where I was first asked to explain my approach to the interviewer with proper complexity analysis and then code the problems. The interviewer was quite friendly and also provided me some hints when I was stuck.
- Q1.
Stack with getMin Operation
Create a stack data structure that supports not only the usual push and pop operations but also getMin(), which retrieves the minimum element, all in O(1) time complexity witho...
- Ans.
Implement a stack with push, pop, top, isEmpty, and getMin operations in O(1) time complexity without using extra space.
Use two stacks - one to store the actual elements and another to store the minimum element at each level.
When pushing an element, check if it is smaller than the current minimum and update the minimum stack accordingly.
When popping an element, also pop from the minimum stack if the popped element is t...
- Q2.
Split Array Into Maximum Subarrays Problem Statement
You are given an integer array
arrof sizeN. Your task is to split the array into the maximum number of subarrays such that the first and last occurre... - Ans.
Given an array, split it into maximum subarrays with first and last occurrence of each element in a single subarray.
Iterate through the array and keep track of the first and last occurrence of each element.
Use a hashmap to store the indices of each element.
Split the array whenever the last occurrence of an element is found.
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
10 Questions
- Q1. They started with something I did not even think of, Images fundamentals. Making images blurry, making them shaggy
- Q2. Operating on images in parallel
- Ans.
Operating on images in parallel involves dividing the image into smaller parts and processing them simultaneously.
Divide the image into smaller parts using techniques like tiling or splitting
Use parallel processing techniques like multi-threading or GPU acceleration
Combine the processed parts to form the final image
Examples: image segmentation, object detection, image enhancement
- Q3. Hardware engines support for parallelism
- Ans.
Hardware engines support parallelism through multiple cores and threads.
Hardware engines can have multiple cores and threads to execute tasks simultaneously.
Parallelism can improve performance and efficiency in hardware-based tasks.
Examples include GPUs, FPGAs, and ASICs that have parallel processing capabilities.
Hardware parallelism can also be achieved through distributed computing and clustering.
Programming language...
- Q4. OS support for parallelism
- Ans.
Modern OSes support parallelism through multi-core processors and threading.
Modern OSes like Windows, macOS, and Linux support parallelism through multi-core processors and threading.
Parallelism can be achieved through processes or threads.
Parallelism can improve performance and efficiency of software.
Examples of parallel programming frameworks include OpenMP and MPI.
- Q5. Recursion, heap and stack management
- Q6. Memory protection in OS?
- Ans.
Memory protection is a feature of an operating system that prevents unauthorized access to memory locations.
Memory protection is achieved through the use of memory management units (MMUs) and virtual memory.
MMUs map virtual addresses to physical addresses and enforce access permissions.
Virtual memory allows the OS to allocate memory to processes in a way that isolates them from each other.
Examples of memory protection ...
- Q7. Interviewer asked my laptop’s configuration and then asked some hardware questions about it
- Q8. You have a lot of small integers in an array. You have to multiply all of them. You need not worry about overflow and range, you have enough support for that. What can you do to speed up the multiplication...
- Ans.
To speed up multiplication of small integers in an array, we can use bitwise operations and parallel processing.
Use bitwise operations like shifting and ANDing to perform multiplication faster.
Divide the array into smaller chunks and perform multiplication in parallel using multi-threading or SIMD instructions.
Use lookup tables for frequently used values to avoid repeated calculations.
Use compiler optimizations like lo...
- Q9. Design a data structure for excel spreadsheet?
- Ans.
Design a data structure for excel spreadsheet
Use a 2D array to store cell values
Implement formulas using a stack
Include formatting options for cells
- Q10. Tower of hanoi?
Interview Preparation Tips
Experience: Some other fundamentals Adobe people were amazingly helpful about computer architecture because I had written it in CV.
Round: Technical Interview
Experience: They started with OS and other subjects of their requirements such as data structures.
Round: Technical Interview
Experience: It was the best one. coding questions and algorithmic thinking was checked. Project work was also discussed.
Skills: Data Structure, Algorithm, OS
College Name: MNIT Jaipur
Skills evaluated in this interview
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