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Senior Software Engineer Interview QuestionsSenior Software Engineers participate in the full software development lifecycle to provide technological solutions and maintain effective operating systems. They’re also responsible for managing a team of Software Engineers. As with all technical roles, a written assignment can give you insight into candidates’ coding skills. These assignments will provide good talking points during your interviews and will help you understand how candidates approach and solve problems. Include questions that reveal candidates’ knowledge of software and specific frameworks you use. Beyond a technical background, this role requires team management skills. Keep an eye out for candidates who are comfortable making difficult decisions and can effectively delegate tasks to their team members. Past experience will show you how candidates manage technical projects end-to-end on tight deadlines and budgets, while keeping their teams motivated. Operational and Situational questions
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Expect to be asked tough technical questions and to give examples of previous projects that you have worked on." 60,513 Senior Software Engineer interview questions shared by candidates Top Interview QuestionsWrite some pseudo code to raise a number to a power.11 Answers ↳ int raise(num, power){ if(power==0) return 1; if(power==1) return num; return(raise(num, power-1)*num); } Less ↳ small mistake function power(x, n) { if n == 1 return x; // Even numbers else if (n%2 == 0) return square( power (x, n/2)); // Odd numbers else return power(x, n-1) * x; } Less ↳ double Power(int x, int y) { double ret = 1; double power = x; while (y > 0) { if (y & 1) { ret *= power; } power *= power; y >>= 1; } return ret; } Less Show More Responses Given an array of numbers, replace each number with the product of all the numbers in the array except the number itself *without* using division.7 Answers ↳ O(size of array) time & space: First, realize that saying the element should be the product of all other numbers is like saying it is the product of all the numbers to the left, times the product of all the numbers to the right. This is the main idea. Call the original array A, with n elements. Index it with C notation, i.e. from A[0] to A[n - 1]. Create a new array B, also with n elements (can be uninitialized). Then, do this: Accumulator = 1 For i = 0 to n - 2: Accumulator *= A[i] B[i + 1] = Accumulator Accumulator = 1 For i = n - 1 down to 1: Accumulator *= A[i] B[i - 1] *= Accumulator Replace A with B It traverses A twice and executes 2n multiplicates, hence O(n) time It creates an array B with the same size as A, hence O(n) temporary space Less ↳ Create two more arrays. One array contains the products of the elements going upward. That is, B[0] = A[0], B[1] = A[0] * A[1], B[2] = B[1] * A[2], and so on. The other array contains the products of the elements going down. That is, C[n] = A[n], C[n-1] = A[n] * A[n-1], and so on. Now A[i] is simply B[i-1] * C[i+1]. Less ↳ Here are my 2 cents to do this in memory without creating temporary arrays. The simple solution , if division was allowed, was multiple all the elements of the array i.e. tolal = A[0]*A[1]]*....*A[n-1] now take a loop of array and update element i with A[i] = toal/A[i] Since division is not allowed we have to simulate it. If we say X*Y = Z, it means if X is added Y times it is equal to Z e.g. 2*3 = 6, which also means 2+2+2 = 6. This can be used in reverse to find how mach times X is added to get Z. Here is my C solution, which take pointer to array head A[0] and size of array as input void ArrayMult(int *A, int size) { int total= 1; for(int i=0; i< size; ++i) total *= A[i]; for(int i=0; i< size; ++i) { int temp = total; int cnt = 0; while(temp) { temp -=A[i]; cnt++; } A[i] = cnt; } } Speed in O(n) and space is O(1) Less Show More Responses What sort would you use if you required tight max time bounds and wanted highly regular performance.6 Answers ↳ Merge sort and heapsort are always guaranteed to be n*log(n). Quicksort is usually faster on the average but can be as bad as O(n^2), although with very low probability. Heapsort also does it sorting in-place, without needing an extra buffer, like mergesort. Lastly, heapsort is much easier to implement and understand than balancing trees mentioned by earlier posts. Less ↳ That is so say, a "Balanced Tree Sort" is guaranteed to be O(n log n) always. ↳ for something like this you generally want bubble sort or insertion sort. It's not about being fast it's about being consistent. Make it do exactly the same thing every time. Less Show More Responses How would you scale access to a system like Twitter3 Answers ↳ I was thinking geographically distributed servers. ↳ There's probably no real correct answer, though the solutions go from common to esoteric in a pretty normal progression: caching, shared-cache like memcache, optimize usage, prefetch, then get creative. This is more about testing reasoning and how far you'll go to solve a problem. Less For the years 1901 to 2000, count the total number of Sundays that fell on the first of a month.3 Answers ↳ import datetime c = 0 for y in range(1901,2001): for m in range(1,13): d = datetime.datetime(y,m,1) if d.weekday() == 6: c += 1 print('Number of Sundays: ',c) Less ↳ import datetime count=0 for i in range(1901,2001): for j in range(1, 13): if datetime.date(i,j,1).weekday() == 6: count+=1 print(count) Less ↳ Two lines of code in matlab: Answer is 171 sundays fall on the first day of the month from 1 Jan 1901 to 31 Dec 2000 dt = datenum(1901,1,1):datenum(2001,1,1)-1; sum(day(dt(weekday(dt) == 1)) == 1) Less Write a function to return the nth fibonacci number. The first two can be assumed to be 1 and 1. The third and fourth are then calculated to be 2 and 3.3 Answers ↳ fib = {1:1, 2:1} def calc_fib(n): if n in fib.keys(): return fib[n] else: fib[n]=calc_fib(n-1)+calc_fib(n-2) return fib[n] print(calc_fib(9)) Less ↳ remember how to approximate as N is large ↳ The matlab example sets N = 12 (the 12th fab. number) which happens to be 144. N = 12; f = ones(N,1); for i = 3:N; f(i) = f(i-1) + f(i-2); end; f(end) Less How would you troubleshoot slow loading web pages and poorly performing stored procedures?2 Answers ↳ Obviously, it is an easy answer though. First you want to check the network connection. If that seems to be working fine with other websites, check the code of the website. If the code is too cluttered then it will have problems loading. Make sure to organize the HTML so you can easily find clutter or useless text. Next, use a website validator - http://validator.w3.org/ . This website helps you find any errors on your page that may be causing a slow down. Hope this helps any, I use this for any problem I have. Less ↳ This is a very good question to ask anyone who is interested in web development. it gets them thinking and start working on problem solving. Less How would you write a program to move inside a square spiral? Start at the upper left corner of the square and walk its edges clockwise. Just before re-approaching the upper left corner, spiral into the square instead, ultimately arriving at the center of the square.2 Answers ↳ def spiral(mat): mat = np.array(mat) arr = [] if mat.shape == (1, 1): arr.append(mat[0][0]) return arr else: arr.extend(mat[0, :]) arr.extend(spiral(np.rot90(mat[1:, :]))) return arr Less ↳ def print_spiral(matrix): print_spiral_help(matrix, 0, 0, 0, len(matrix[0]) - 1, len(matrix) - 1) def print_spiral_help(matrix, dir, top, left, right, bot): if left > right or top > bot: return # top if dir == 0: for i in range(left, right + 1): print matrix[top][i], print_spiral_help(matrix, 1, top + 1, left, right, bot) # Right elif dir == 1: for i in range(top, bot + 1): print matrix[i][right], print_spiral_help(matrix, 3, top, left, right - 1, bot) # Left elif dir == 2: for i in range(bot, top - 1, -1): print matrix[i][left], print_spiral_help(matrix, 0, top, left + 1, right, bot) # Bottom elif dir == 3: for i in range(right, left - 1, -1): print matrix[bot][i], print_spiral_help(matrix, 2, top, left, right, bot - 1) Less How would you build a BART train system.2 Answers ↳ Various infrastructure, logic, and fail safe issues. Caching, redundancy, customer experience handling in case of failures. Less ↳ I would identify and address all of the various infrastructure, logic, and fail safe issues as well as design systems to handle caching, redundancy, and customer experience handling in case of failures. Less Q: Why multiple inheritances are not supported in Java?1 Answers ↳ Because of diamond pattern, diamond pattern creates ambiguity and make problem for compiler. Anyway java supports multiple inheritances via interfaces. I think more convincing reason for not supporting multiple inheritance is complexity involved in constructor chaining, casting etc rather than diamond. Less See Interview Questions for Similar JobsWhat questions should I ask a senior software engineer?General questions. Tell me about your interests in current development trends.. Do you enjoy contributing to open-source projects?. What do you know about our firm's technology services?. How do you approach setting professional goals?. How do your qualifications support your success as a senior developer?. How can I pass technical interview in software engineering?How to prepare for a technical interview. Prepare a 30-second to 1-minute elevator pitch for the “tell me about yourself” question and examples/stories for other interview questions. ... . Before you go, study up on the most important CS fundamentals. ... . Pick one programming language and know it really well.. What are the technical questions asked in it interview?Basic questions to ask in interviews. Do you have any technical certifications?. How many programming languages do you know?. What are the different types of OS you are comfortable working with?. What is the extent of your technical expertise?. How many development tools have you used?. How do I pass a senior developer interview?How to structure senior developer interviews. Do not ask senior developers to complete a test to explain a simple algorithm or data structure- most candidates for senior posts haven't dealt with such matters in years.. Stay away from whiteboard-testing.. Ask candidates to share a few work samples.. |