Quantitative research associate Interview Questions | Glassdoor.co.in

# Quantitative research associate Interview Questions

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quantitative research associate interview questions shared by candidates

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### Quantitative Researcher at WorldQuant was asked...

6 Aug 2012
 Minimize the number of comparisons for finding minimum and maximum of a given set of numbers.6 AnswersGiven n numbers, the optimal number of comparison should be 3n/2 Pairwise compare all numbers = n/2 comparisons It is easy to see that the max, min lies among the n/2 elements which are greater, smaller respectively. Pairwise compare the n/2 greater elements = n/4 comparisons. Again pairwise compare the n/4 greater elements obtained in previous step = n/8 comparions. ... You get max(min) in n/4+n/8+...1 = n/2 comparisons. initial comparisons = n/2 comparisons to get max number = n/2 comparisons to get min number = n/2 Total = 3n/2Here is matlab code according to the suggested algorithm : clear; clc; vec=[3,8,7,2,1,6,5,4]; [max12,min12]=max_min(vec(1),vec(2)); [max34,min34]=max_min(vec(3),vec(4)); [max56,min56]=max_min(vec(5),vec(6)); [max78,min78]=max_min(vec(7),vec(8)); [max1234,~]=max_min(max12,max34); [max5678,~]=max_min(max56,max78); [max12345678,~]=max_min(max1234,max5678); fprintf('max=%d\n',max12345678); % Find Min [~,min1234]=max_min(min12,min34); [~,min5678]=max_min(min56,min78); [~,min12345678]=max_min(min1234,min5678); fprintf('min=%d\n',min12345678);More on the above analytic solution: The resulting sequence is geometric with missing first two terms, n + n/2. Sum of a geometric sequence n + n/2 + n/4 + ... + 1 = 2n So for the present sequence: sum = 2n - n - n/2 = n/2 Thus the minimum number of steps required for finding BOTH the minimum and maximum of the set of numeric values is 3n/2. However, to calculate only minimum or maximum, the minimum number of steps would be (n-1) by pairwise comparison.Show more responsesBy the same logic it is n-1 when only maximum or minimum has to be found out from n nos., the correct answer will be n/2 + (n/2-1)+(n/2-1) = 3n/2-2if n is even, 1+3*(n-2)/2=3n/2-2 if n is odd, 3(n-1)/2-2+2=3(n-1)/2Comparison would be less if the range is less with minimum to maximum

### Quantitative Research at J.P. Morgan was asked...

21 Aug 2018
 How to find a loop in a linked list?1 AnswerUse two pointers a tortoise and a hare...move torotise by 1 and hare by 2. if these two meet somewhere there is a loop in the linked list.

### Quantitative Researcher at India Health Action Trust was asked...

2 Apr 2019
 Salary expectation and When I can join?1 AnswerIt was pointless question because I did not get any offer from them

### Quantitative Researcher at Acuity Knowledge Partners was asked...

31 Jan 2020
 Technology questions, market analysis etc.1 AnswerMostly related to resume.

31 Jan 2020

31 Jan 2020

### Quantitative Research Analyst at J.P. Morgan was asked...

5 Jan 2018
 Two questions in each probability, puzzles and coding.Be the first to answer this question

### Quantitative Research Analyst at J.P. Morgan was asked...

5 Jan 2018
 What is a Call Option, a Forward contract. Be the first to answer this question

### Quantitative Researcher at J.P. Morgan was asked...

6 Apr 2019
 Joint probability distributionsBe the first to answer this question

### Quantitative Research at Tower Research Capital LLC was asked...

26 Aug 2019
 Expected Number of tossed to get n consecutive heads Be the first to answer this question
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