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Blackrock Market Analyst Interview Questions and Answers

Updated 4 Apr 2024

Blackrock Market Analyst Interview Experiences

1 interview found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via LinkedIn and was interviewed in Oct 2023. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. How will you swap two numbers without using third variable ?
  • Ans. 

    To swap two numbers without using a third variable, use arithmetic operations like addition and subtraction.

    • Store the sum of the two numbers in one of the variables, then subtract the other number from the sum to get the value of the first variable.

    • Finally, subtract the value of the first variable from the sum to get the value of the second variable.

  • Answered by AI
  • Q2. Give me diameter of binary tree .
  • Ans. 

    The diameter of a binary tree is the number of nodes on the longest path between two leaves in the tree.

    • The diameter of a binary tree can be calculated by finding the height of the left subtree, the height of the right subtree, and adding them together.

    • The diameter may or may not pass through the root of the tree.

    • Example: In a binary tree with nodes 1, 2, 3, 4, 5, the diameter would be 4 (passing through nodes 4, 2, 1,

  • Answered by AI
  • Q3. Design a basic google doc editor with oops.
  • Ans. 

    A basic Google Doc editor designed using OOP principles.

    • Create a Document class to represent the Google Doc

    • Include methods for editing text, adding images, and formatting

    • Use classes like Text, Image, and FormattingOptions for different elements

    • Implement features like undo/redo functionality and collaboration tools

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Blackrock Market Analyst interview:
  • javascript
  • nodejs
  • cpp
  • dsa
Interview preparation tips for other job seekers - - prepare for DSA with basics
- prepare for OOPs
- grill your resume

Skills evaluated in this interview

Interview questions from similar companies

Interview Questionnaire 

3 Questions

  • Q1. Salary negotiations
  • Q2. Tmt sector knowledge
  • Q3. Profile based question on

Interview Preparation Tips

Round: Technical Interview
Experience: Technical on paper test questions:(dis was only for 12 among d 26 shortlisted ppl after apti...others directly had interviews)
5 wer selected in this test who wer nw sent for interviews
TECHNICAL INTERVIEW: (pls list the questions asked in all the rounds)
26 shortlisted after apti (14 directly for interviews & 12 had one more technical on paper test...mentioned above)
der wer min 2 technical rounds for each of them...max were 5

- You are given course dependencies
A->B,C
B->D
C->A
D->nothing
The above dependencies mean...if you want to take course A...you should take courses B and C first....To take B,Course D must be taken first....D is an independent course and can be taken without any prior requirements.
Now you are told these dependencies.Come up with an appropriate data structure to represent these dependencies.Then write a code that finds out all the courses that the student can take up...in this case the student can first take course D because its independent.Now that course D has been taken he can next take up B as it depends on B alone...But the courses A and C can never be taken because they depend on each other...So here all the courses that can be taken are B and D.
After i wrote the code....he asked for all possible test cases
-Given an array of length N....It can be filled with nos. only from 1 to N....find which nos are repeated in the array
-Given pointers to two nodes in a binary tree....find their least common ancestor...each node has pointer to only the parent node...not the left and right child..
-In a binary tree(Not necessarily a BST)...suppose the weight of any node is defined as the product of the key value of the node and the level of the node(Root at level 1)...find the node with maximum weight in the binary tree
-A sorted array of size n is right circularly rotated k times and this rotated array is given to you as input...Find out the value of k in log n time .
-There are some processes running at time T....and there are processes running at time T+30.
You have to find out
1)Which processes died at time T+30,which were alive at time T
2)Which are the new processes at time T+30,which were not there at time T
3)Which are the processes that were there at time T and are still running at time T+30
What data structure will you use to represent the process lists and write code to find out the answers to the 3 questions above
-Given a binary search tree...and a target sum...starting at the root...which all paths add up to the target sum?...if there are multiple paths....return the path with least no. of nodes.


College Name: Veermata Jijabai Technological Institute, Mumbai [ VJTI ]

I was interviewed in Dec 2016.

Interview Questionnaire 

8 Questions

  • Q1. Question related to projects mentioned in CV.
  • Q2. Question related to Database Management.
  • Q3. Given a web portal that is running slow, how would you debug the solution for that? Answer stepwise.
  • Ans. 

    Debugging steps for a slow web portal

    • Check server load and resource usage

    • Analyze network traffic and latency

    • Review code for inefficiencies and optimize

    • Use profiling tools to identify bottlenecks

    • Consider caching and content delivery networks

    • Test and monitor performance after changes

  • Answered by AI
  • Q4. Generally we store data in normalised form, but it makes it slow to run any queries. How would you make the queries run faster?
  • Ans. 

    Denormalization, indexing, caching, and partitioning can improve query performance.

    • Denormalize the data to reduce the number of joins required for queries.

    • Create indexes on frequently queried columns to speed up search.

    • Cache frequently accessed data in memory to avoid disk reads.

    • Partition large tables into smaller ones to reduce the amount of data that needs to be scanned.

    • Use query optimization techniques like query re...

  • Answered by AI
  • Q5. Write a sorting algorithm in detail.
  • Ans. 

    Sorting algorithm organizes data in a specific order.

    • Choose a sorting algorithm based on the data size and type.

    • Common sorting algorithms include bubble sort, insertion sort, and quicksort.

    • Implement the chosen algorithm in code.

    • Test the algorithm with sample data to ensure it sorts correctly.

  • Answered by AI
  • Q6. Who or what inspires you the most?
  • Ans. 

    My parents inspire me the most.

    • Their hard work and dedication to providing for our family motivates me to work hard.

    • Their unwavering support and encouragement has helped me overcome challenges.

    • Their values and principles have shaped me into the person I am today.

    • Seeing their sacrifices and selflessness inspires me to be a better person.

  • Answered by AI
  • Q7. What are the qualities of a leader?
  • Ans. 

    A leader should possess qualities like vision, communication, empathy, integrity, and adaptability.

    • Vision: Ability to see the big picture and set goals accordingly

    • Communication: Ability to convey ideas clearly and listen actively

    • Empathy: Ability to understand and relate to others' emotions and perspectives

    • Integrity: Consistency in values, actions, and decisions

    • Adaptability: Ability to adjust to changing circumstances a

  • Answered by AI
  • Q8. Why Morgan Stanley?
  • Ans. 

    Morgan Stanley is a top-tier investment bank with a strong reputation for excellence and innovation.

    • Morgan Stanley has a long history of success in the financial industry

    • The company is known for its innovative approach to investment banking

    • Morgan Stanley has a global presence and offers a wide range of services to clients

    • The firm has a strong commitment to diversity and inclusion

    • Morgan Stanley is a great place to work

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: The interviewer asked questions based upon CV. He first made me adjust to the environment and then started the serious questions realted to technical stuff.
Tips: Never lie about any subject you don't really know. Keep a particular topic strong, in my case it was Database Management. Have good problem solving skills, if not efficient but at least a good solution.

Round: Technical Interview
Experience: The round consisted of technical questions based on my analysis of the first round. Consisted of higher levele questions related to my topics of my expertise.
Tips: Be ready for any spontaneous questions. Explain whatever comes to your mind instead of quietly thinking. Be communicative and confident. They don't care about the syntax but rather the logical thinking.

Round: HR Interview
Experience: Just be communicative. Since you've qualified till the HR interview, you are almost confirmed for their position. They checked if I could handle pressure or not. They tried to know if they could give me more responsibilities in the near future or not.
Tips: Be confident and don't hesitate to answer. Express what you feel genuinely. Show that you are a responsible guy.

College Name: IIT Varanasi

Skills evaluated in this interview

I was interviewed in Dec 2016.

Interview Preparation Tips

Round: Resume Shortlist
Experience: For CSE and EE students , CPI was not at all seem to be a criteria for shortlisting and almost all who have a decent profile got shortlisted for the test. However, for other department students they shortlisted above 9 CPI students.

Round: Test
Experience: It was a 2 hour test. It consisted of 3 sections-Quant , Machine Learning and Computer Science . Each section had 10 questions and 45 minutes were allotted for each section.
Being from non-CSE background I attempted only 2 sections ie. Quant and Machine Learning. Machine Learning section was fairly easy this time and almost all questions were standard. If someone has done an introductory course on Machine Learning and basic stats , this section was a cake walk for him. However , attempting quant section required some preparation of solving probability puzzles (computing expectations etc.) ,basic linear algebra and geometry base questions.
Duration: 2 hours

Round: Technical Interview
Experience: I had 2 rounds of interview. Both were technical ones.
In the first interview , they asked some probability puzzles (from 50 challenging problems in probability book) . Since I had completed that book before , I was able to solve them . Then they asked 1-2 algorithm based questions like formulate an efficient algorithm for solving a particular problem. I was not able to solve them completely but tried to give them the overview of y approach. The interviewer didn't seem to be satisfied though. It lasted for around 20-25 minutes.He told me to wait outside . To my surprise, I was called for the 2nd round.
The second went better than the first round. They again asked questions on computing probability , expectations , constructing a Markov Chain for a a given problem etc. Since I had done 1 course in Fiance also , he asked me questions from it also which were quite easy. Then he began asking algorithms and asked me to explain a sorting algorithm and I chose Quick Sort. While explaining it , I got struck at one point but the interviewer was helping me by giving hints and I was able to explain it fully. The second round was quite exhaustive as it went on for around 45-60 minutes.

Skills: Problem Solving Abilties, Mathematical Aptitude, Algorithmic Approach To Problem Solving, Machine Learning, Statistical Method Basics
College Name: IIT Kanpur

Analyst Interview Questions & Answers

Morgan Stanley user image Deepak Kumar Thakur

posted on 5 Dec 2015

I applied via Walk-in

Interview Questionnaire 

1 Question

  • Q1. Finance related questions

Interview Preparation Tips

Round: Technical Interview
Experience: I think they were looking for Basic understanding of financial accounting, confidence.
My experience of working on valuation of Oil & Gas projects, financial modelling helped a lot
Tips: My confidence in answering questions related to finance and Read thoroughly two chapters 11 & 12 of “Financial Accounting” book by RNS

Skill Tips: They will give you required training
Skills: Finance
College Name: IIM Bangalore

Interview Questionnaire 

4 Questions

  • Q1. Asked about my projects – the technical aspects, scope, etc
  • Q2. Databases and Mysql – queries, types of keys, joins, etc
  • Q3. Fundamentals of Operating Systems – threads/processes, scheduling algorithms, memory/storage, etc
  • Q4. Data Structures and Files, so – sorting/searching algorithms, their complexities, files, other data structures, etc

Interview Preparation Tips

Round: Test
Experience: The first round, quite naturally, was the aptitude round. We had to answer questions that were designed to test our quantitative and technical abilities. But this was only the first part. The second part involved finding computational solutions to simulated situations. These questions needed to be solved in a programming language we were asked to choose earlier, during the aforementioned first part. I chose to do it in Java as that is one language I am really thorough with. I understand that C/C++ are more important and versatile, but what matters here is your inherent understanding of the concepts involved

Round: Group Activity
Experience: We had to build model buildings, using LEGO blocks. Other than the fact that I love building things from other smaller things, the supplied material took me back to my childhood days. We were divided into four groups. Two in each room, and each group consisted of 8-10 candidates. We were given a time limit within which we had to design and construct a building. As a surprise, after half time, they asked the two groups in each room to merge their projects. This probably was to see if the candidates were pro-active team players, and could handle unexpected situations like professionals.

Round: Technical Interview
Experience: There was another technical interview after the group activity. I was interviewed by two of their officers, who again asked questions similar to those from the first technical round.  It went quite well, since I was quite confident about the way I was solving the problems they gave me. Thinking out loud is key, as that lets them in your problem-solving abilities. That way, they let you know if you are headed in the right direction. My interviewers were quite pleasant, as they liked discussing possible scenarios to the problems they gave me.

Round: HR Interview
Experience: there was an HR round, where the woman interviewed me about my projects. She needed to know if I had the guts to finish whatever it is that I started. So she asked more on the lines on my role in the projects I had undertaken in the previous years. She also asked me about my working experience from before. That too went well. It was pretty much a standard HR interview – projects, hobbies, traits, etc.

Round: fitness roound
Experience: There was another round in the end, which was to test the candidate’s professional fitness – if they indeed are the right people for the job. I found it to be a blend of technical and HR interviews, more on the lines of HR though. All in all, it was a brilliant experience

General Tips: To my juniors, study hard, be sincere, be yourself, be smart (preferably in that order, but you are free to improvise!)
College Name: IIT MADRAS

Interview Questionnaire 

4 Questions

  • Q1. How would you find whether a number is even or odd without using any conditions?
  • Ans. 

    Using bitwise operator to check the last bit of the number.

    • Use bitwise AND operator with 1 to check the last bit of the number.

    • If the result is 0, the number is even. If the result is 1, the number is odd.

    • Example: 6 & 1 = 0 (even), 7 & 1 = 1 (odd)

  • Answered by AI
  • Q2. Implement a dynamic 2D excel sheet using DS (underwent various levels of improvisations)
  • Ans. 

    Implement a dynamic 2D excel sheet using DS

    • Use a 2D array to store the data

    • Implement functions to add, delete, and modify data

    • Use data structures like linked lists or hash tables for efficient searching and sorting

    • Implement dynamic resizing to handle large amounts of data

    • Use GUI libraries like Tkinter or PyQt for user interface

  • Answered by AI
  • Q3. A build up that resulted in the concept of using joins in DBMS
  • Ans. 

    Joining tables in DBMS evolved as a solution to handle complex data relationships.

    • Joins allow combining data from multiple tables based on a common column.

    • The concept of joins originated from the need to handle complex data relationships.

    • Joins can be inner, outer, left, right, or cross depending on the type of data required.

    • Joins can improve query performance by reducing the number of queries needed to retrieve data.

    • Jo...

  • Answered by AI
  • Q4. Discussed the concept of virtual memory and paging in OS

Interview Preparation Tips

Round: Test
Experience: There was negative marking for these questions (+4 & -1) and the number of questions in the second section were more (10 and 20 respectively, I think).The second part of the test was a Coding Round, online. We were given 3 problem statements to be solved in 45 minutes and the programming languages allowed were C, C++ and Java. However you are required to use the same language for Part 1 (Technical Skills) and Part 2 (Coding Round). So make sure you know any one language in its entirety. I hadn’t touched anything apart from C. The questions were essentially based on data structures.
Tips: Word of caution: Be wise in designing your strategy to solve questions, there always IS a sectional cut off and the competition is cutthroat.

Round: Technical Interview
Experience: -1 was pretty much basic, probably just for them to find out whether you know everything that you claim to know. I was asked questions on the basics of C, Data structure implementation, DBMS AND OS. Sounds daunting, but it really wasn't. My panellists were really cool about giving me all the time in the world to think about my answers, they'd even roll their chairs to the corner of the room and chit chat when I'd ask them to stop looking at me. Not a recommended course of action for you guys, because you might get really badass panellists who might want to take a stress interview and using this would probably get you a ticket to take you directly out of the building. But the point is that you don't need to panic when you're asked a question that you don't understand AT ALL. It is probably just a coating of shiny silver on a very basic problem. ALWAYS remember to restate the question as you understood it to make sure that you're on the right track. If you're right you get a bonus for being able to analyse well. If you're not, they will make you understand and you won't spend 15 minutes of your interview time solving a misinterpreted question.

Round: Group Activity
Experience: This is subject to change every year, but for ours we had the one with the Lego toys

Round: Technical Interview
Experience: This round was perhaps the most difficult of all, with gruelling technical questions that I couldn't make head or tail out of. But they were satisfied with a broad outlook to the number of solutions and the different ways to approach the problem. They asked me a little about how my day had been till then and for improvisations on the answers to the questions I was asked in the previous rounds. I was also asked a question about synchronization that I answered with my knowledge of embedded systems. They were really interested in how I applied unrelated knowledge to solve a problem that I would otherwise not be able to answer. This was the end of TECH-2 which made me believe that I had screwed up entirely and that I was out for sure.

Round: PRO FIT ROUND
Experience: I went in to my ProFit round with an "I-should-really-have the-best-time-with-this-thing-since-it-is-all-down-the-drain-anyway" attitude, but really, I think that is just what you're expected to do anyway. :) This ended up being the coolest round of all and I had the time of my life for those 30 minutes. My interviewer asked me ALL the general questions you expect in an HR, and I answered them all very, very truthfully and with really long explanations :P The guy was a veeeeery keen listener and caught on to each and every one of my indications. He let me talk about practically everything, from my very hippie-like outlook of life to the most silly bets I have placed, ever. And the best part was that he was always interested, poker-face like, but always waiting patiently for more exemplifications. Don't bother trying to make up achievements you haven't really made, because they don't care about how accomplished you are, more like how zestful you are, and it probably shows when you're talking about things that you love. Long story short, talk your heart out, they hardly speak in all of those 30 minutes. Let them know that you really ARE passionate about the things that you do.

Round: HR Interview
Experience: The next round that I was immediately ushered into was my HR. Now, I probably felt what I did because I had talked a LOT in my previous round, but I really thought this round was predominantly precursory. My interviewer was one of the big shots of the day, but he hardly asked me any questions that could qualify as HR. This person was the only one from all of my interviews who was even remotely rigid, but that too only marginally. He was ultra-friendly again by the end of the interview. This might vary case by case, but he only asked me things like my comfort with relocation and what I aimed to achieve in the next 5 years. At the end of the interview, he kid around a little and escorted me to the waiting room.

College Name: IIT MADRAS

Skills evaluated in this interview

Interview Preparation Tips

Round: Test
Experience: First round - 1 hour online test split into 2 sections. First section - aptitude 10 questions and c/c++/java 10 question for a total of 30 minutes. Second section included 2 coding questions for a total time of 30 minutes. Approx - 400 students.

General Tips: Aptitude was hard and pace is important. Practicing commercial mathematics will help. Past projects are important and resume should have only information that you are thorough with.Understand the company and what it does before the personal interviews.
Skill Tips: Prepare well DSA, OS ,Aptitude,C,C++ , by the help of Indiabix.com.
Skills:
College Name: NIT Surathkal

Interview Questionnaire 

23 Questions

  • Q1. Why Morgan Stanley?
  • Ans. 

    Morgan Stanley is a top-tier investment bank with a strong reputation for innovation and excellence.

    • Morgan Stanley has a long history of success in the financial industry

    • The company is known for its innovative approach to investment banking

    • Morgan Stanley has a strong reputation for excellence in research and analysis

    • The firm offers a wide range of services to clients, including wealth management and investment banking

    • M...

  • Answered by AI
  • Q2. What between Tower and Morgan Stanley?
  • Ans. 

    Tower and Morgan Stanley are both financial services companies.

    • Tower is a global investment management firm with over $1 trillion in assets under management.

    • Morgan Stanley is a multinational investment bank and financial services company.

    • Both companies offer a range of financial services including wealth management, investment banking, and asset management.

    • Tower is known for its focus on sustainable investing, while Mo...

  • Answered by AI
  • Q3. Strengths/weakness
  • Q4. What is the job profile offered ? Why not phd?
  • Ans. 

    The job profile offered is for an analyst position. A PhD is not required for this role.

    • The job involves analyzing data and providing insights to clients

    • A PhD is not necessary as the role focuses more on practical application of analytical skills

    • The job may require a bachelor's or master's degree in a related field

    • Examples of job responsibilities may include data collection, statistical analysis, and report writing

  • Answered by AI
  • Q5. Minimize the cost of the pen, what innovations can you do with it?
  • Ans. 

    Innovations to minimize cost of pen

    • Use recycled materials for pen body and ink

    • Simplify design to reduce production costs

    • Implement refillable ink cartridges to reduce waste and cost

    • Partner with companies for bulk purchasing of materials

    • Automate production process to reduce labor costs

  • Answered by AI
  • Q6. Prove that for N>= a, N> N^.5 + N^(1/3)+N^(1/4)
  • Ans. 

    Prove N>=N^.5+N^(1/3)+N^(1/4) for N>=a

    • Use AM-GM inequality

    • Substitute N with a and prove the inequality holds

    • Use calculus to find the minimum value of the expression

  • Answered by AI
  • Q7. Statisticss, Algorithms
  • Q8. X, y are random variables with probability distribution ke^(-kx) and ue^(-ux). What is the dist. for min(x,y)
  • Ans. 

    Finding the probability distribution for the minimum of two random variables with given distributions.

    • Use the formula P(min(x,y)>z) = P(x>z)P(y>z)

    • Integrate over the range of z to get the distribution of min(x,y)

    • Final distribution is 2ke^(-kx)ue^(-ux)exp(-uz)

  • Answered by AI
  • Q9. An organism dies out with prob. p and spawns into 2 with prob (1-p). what is the prob. that starting from 1,the organism will die out?
  • Ans. 

    Given prob. p of dying out and prob. (1-p) of spawning into 2, find prob. of dying out starting from 1 organism.

    • Use probability tree to visualize outcomes

    • Probability of dying out starting from 1 is p + (1-p) * (probability of dying out starting from 2)^2

    • Solve recursively to get final answer

  • Answered by AI
  • Q10. In a unit circle, p is chosen uniformly on the circle and q inside the circle, what is the prob. that the rectangle is inside the circle?
  • Ans. 

    Probability of a rectangle being inside a unit circle with p chosen uniformly on the circle and q inside the circle.

    • The probability can be found by calculating the ratio of the area of the rectangle to the area of the circle.

    • The area of the circle is pi and the area of the rectangle can be found using the distance between p and q.

    • The probability is 1/4.

    • Example: If the distance between p and q is 0.5, then the area of t...

  • Answered by AI
  • Q11. Find a local minima of an array in o(log n)? In a functional program
  • Ans. 

    Find local minima of an array in o(log n) in functional programming.

    • Use binary search to find the local minima.

    • Check if the mid element is a local minima, if not, move towards the lower side.

    • If the mid element is greater than its left element, move towards the left side, else move towards the right side.

    • Repeat until a local minima is found.

    • Example: [5, 3, 2, 4, 6, 8, 9] -> local minima is 2.

  • Answered by AI
  • Q12. Write a code to sort a list without pipes?
  • Ans. 

    Code to sort a list without pipes

    • Use a sorting algorithm like bubble sort, insertion sort, or selection sort

    • Implement the algorithm in the programming language of your choice

    • Test the code with different input sizes and types

  • Answered by AI
  • Q13. Find an even length palindrome in a string in o(n)?
  • Ans. 

    To find an even length palindrome in a string in O(n), we can use the two-pointer approach.

    • Initialize two pointers at the center of the string.

    • Expand the pointers outwards while checking if the characters at both pointers are equal.

    • If they are not equal, return the previous substring as the even length palindrome.

    • If the pointers reach the end of the string, return the entire string as the even length palindrome.

  • Answered by AI
  • Q14. A is a matrix vi's are n linear vectors s.t. Avi= Vj a<=j<=n, what are the possible values of |A|?
  • Ans. 

    Possible values of determinant of matrix A given Avi=Vj for n linear vectors

    • The possible values of |A| are non-zero as the given vectors are linearly independent

    • The value of |A| can be calculated using the formula |A| = (-1)^n * det(A)

    • If the given vectors are orthogonal, then |A| is the product of the magnitudes of the vectors

  • Answered by AI
  • Q15. A and B play a game with unfair count with P[Heads]= p. they count # of heads and tails .if # of heads > #tails +1 at any point, A wins.Find the prob. that A wins
  • Ans. 

    A and B play a game with unfair coin. A wins if # of heads > #tails +1 at any point. Find prob. of A winning.

    • The game is played with an unfair coin with P[Heads]=p

    • A wins if # of heads > #tails +1 at any point

    • Find the probability of A winning

  • Answered by AI
  • Q16. Given a sorted array find two element (i,j) s.t. i+j =x in O(n) time?
  • Ans. 

    Find two elements in a sorted array that add up to a given sum in linear time.

    • Use two pointers, one at the beginning and one at the end of the array.

    • If the sum of the two pointers is greater than the target, move the right pointer to the left.

    • If the sum of the two pointers is less than the target, move the left pointer to the right.

    • Repeat until the sum is found or the pointers meet.

    • Example: Given [1, 2, 3, 4, 5] and ta

  • Answered by AI
  • Q17. Question on bubble sort : Given random permutation, suppose i run bubble sort on it.
  • Q18. What is the prob. that element at 20th position lands up at 31st position after the first iteration?
  • Ans. 

    The probability of element at 20th position landing up at 31st position after the first iteration.

    • The probability depends on the size of the dataset and the algorithm used for iteration.

    • If the algorithm involves swapping adjacent elements, the probability is higher.

    • If the dataset is sorted in a way that the element at 20th position is adjacent to the element at 31st position, the probability is 1.

    • The probability can be...

  • Answered by AI
  • Q19. A rod at length l, I randomly put 100 ants in the rod .each ant moves left and right in random direction with l m/s .what is the expected no. of collisions after 30 secs?
  • Ans. 

    Expected number of collisions between randomly moving ants on a rod after 30 seconds.

    • Calculate the probability of two ants colliding at any given time.

    • Use the formula for expected value to find the expected number of collisions.

    • Assume that the ants are point masses and collisions are perfectly elastic.

    • Consider the possibility of multiple ants colliding at the same time.

    • Simulation can also be used to estimate the expect

  • Answered by AI
  • Q20. In how many ways can i permute n numbers 1 2 3...n so that all the no.s between u and i+1 are less than i (for all i in the permutation)?
  • Ans. 

    Counting permutations where numbers between u and i+1 are less than i for all i in the permutation.

    • The first number in the permutation must be 1.

    • For each i in the permutation, all numbers between u and i+1 must be less than i.

    • Use dynamic programming to count the number of valid permutations.

    • The answer is (n-1)th Catalan number.

    • Example: for n=4, the answer is 5.

  • Answered by AI
  • Q21. Find f(n) : pdt F(x) cdf. the value of k> 0 a constant -inf S +inf f(x)*F(kx) dx x follows normal standard distribution?
  • Ans. 

    Finding f(n) for a normal standard distribution with a given constant k.

    • Calculate the product of probability density function and cumulative distribution function.

    • Integrate the product of f(x) and F(kx) from -inf to +inf.

    • The value of k is a constant greater than 0.

  • Answered by AI
  • Q22. Number of inversions in an array in O(nlogn) time?
  • Ans. 

    Number of inversions in an array in O(nlogn) time.

    • Use merge sort algorithm to count inversions

    • Divide the array into two halves and recursively count inversions

    • Merge the two halves and count split inversions

    • Time complexity is O(nlogn)

  • Answered by AI
  • Q23. Given a chessboard 8X8 I put numbers from 1 to 8 in it in such a way that no. x is the mean/average of its neighbor. What is the range of the numbers?

Interview Preparation Tips

Round: Test
Experience: Topics:
1. Statistics
2. Probability distributions
3. Theorms of linear algebra 
4. Algorithms: DP, Puzzle
Duration: 120 minutes
Total Questions: 8

General Tips: Improve on Linear Algebra&#44; Probability, Algorithms.
College Name: IIT KANPUR

Skills evaluated in this interview

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Blackrock Interview FAQs

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Blackrock interview process usually has 1 rounds. The most common rounds in the Blackrock interview process are Technical.
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