Software Developer Interview Questions

96,323 software developer interview questions shared by candidates

You are given an array of integers, a1, that have sequential integers 1 through n. ( { 1,2,3,4,5 } or { 1,2,3 } or any other array) You are also given an array of integers, a2, that also have numbers 1 through n, but are not in sequential order and are missing one of the numbers between 1 and n. Find the missing number in a2. Did you check for special cases? Can you do this in O(n) runtime?
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Software Developer Intern

Interviewed at Redfin

3.5
Feb 19, 2016

You are given an array of integers, a1, that have sequential integers 1 through n. ( { 1,2,3,4,5 } or { 1,2,3 } or any other array) You are also given an array of integers, a2, that also have numbers 1 through n, but are not in sequential order and are missing one of the numbers between 1 and n. Find the missing number in a2. Did you check for special cases? Can you do this in O(n) runtime?

Puzzle1 - Given 8 coins, and the fact that one of the coins is heavier than the other, how many times(min) do you need to use a beam balance to figure out which is the anomalous coin? After I answered this, he made it little tougher. Given 9 coins and one anomalous coin(maybe heavier or lighter), figure out which coin it is and whether heavier or lighter. What is the min no of comparisons? This is where i took a while to answer.
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Financial Software Developer

Interviewed at Bloomberg

4
Nov 16, 2010

Puzzle1 - Given 8 coins, and the fact that one of the coins is heavier than the other, how many times(min) do you need to use a beam balance to figure out which is the anomalous coin? After I answered this, he made it little tougher. Given 9 coins and one anomalous coin(maybe heavier or lighter), figure out which coin it is and whether heavier or lighter. What is the min no of comparisons? This is where i took a while to answer.

In the phone interview, they just asked about my projects on the resume. and my programming experience. A week later, I got noticed that I need to take an online assessment. This assessment had 4 parts, first is 10 quick response questions, very easy, just be quick, you have 2 minutes limit; second is math questions, not hard, but need to be very careful; third is programming learning, they first teach you some basic rules about a new programming language and then test you each point they have shown you. I think this part is to test if you are a quick learner; the last part is 4 programming questions using the languages they have provided, for me, these questions are not very easy. It took a long time. Please prepare a calculator for the test. I forget to prepare one so it took longer to figure some questions. Please keep this in mind: being fast is important, but not as important as accuracy. You can find online assessment sample questions on the website to prepare for the assessment.
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Software Developer

Interviewed at Epic

3.3
Mar 3, 2015

In the phone interview, they just asked about my projects on the resume. and my programming experience. A week later, I got noticed that I need to take an online assessment. This assessment had 4 parts, first is 10 quick response questions, very easy, just be quick, you have 2 minutes limit; second is math questions, not hard, but need to be very careful; third is programming learning, they first teach you some basic rules about a new programming language and then test you each point they have shown you. I think this part is to test if you are a quick learner; the last part is 4 programming questions using the languages they have provided, for me, these questions are not very easy. It took a long time. Please prepare a calculator for the test. I forget to prepare one so it took longer to figure some questions. Please keep this in mind: being fast is important, but not as important as accuracy. You can find online assessment sample questions on the website to prepare for the assessment.

Given a list of integers A and an integer k, return the number of unique pairs of integers in A that sum to k. For example, if A=[1 2 5 5 10 8 2] and k=10, the answer is 2, arrived as 5+5 or 2+8. There were 15 tests for this question, with at least the last two timing out, given that the implementation was not as efficient as possible.
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Senior Software Developer

Interviewed at Bloomberg

4
Aug 7, 2016

Given a list of integers A and an integer k, return the number of unique pairs of integers in A that sum to k. For example, if A=[1 2 5 5 10 8 2] and k=10, the answer is 2, arrived as 5+5 or 2+8. There were 15 tests for this question, with at least the last two timing out, given that the implementation was not as efficient as possible.

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