Skip to contentSkip to footer

Software Developer Interview Questions

Salaries
Interviews

96,396 software developer interview questions shared by candidates

There are one hundred closed lockers in a hallway. A man begins by opening all one hundred lockers. Next, he closes every second locker. Then he goes to every third locker and closes it if it is open or opens it if it is closed (e.g., he toggles every third locker). After his one hundredth pass in the hallway, in which he toggles only locker number one hundred, how many lockers are open?
avatar

Financial Software Developer

Interviewed at Bloomberg

4★
Nov 25, 2011

There are one hundred closed lockers in a hallway. A man begins by opening all one hundred lockers. Next, he closes every second locker. Then he goes to every third locker and closes it if it is open or opens it if it is closed (e.g., he toggles every third locker). After his one hundredth pass in the hallway, in which he toggles only locker number one hundred, how many lockers are open?

Write a program that given a 2D integer matrix (default value: 0) and a coordinate in the matrix, it sets all of the elements diagonal to the coordinate to a value of 1 (so that if you wrote it on a piece of paper there's an X with the coordinate at the center).
avatar

Financial Software Developer

Interviewed at Bloomberg

4★
Jun 9, 2011

Write a program that given a 2D integer matrix (default value: 0) and a coordinate in the matrix, it sets all of the elements diagonal to the coordinate to a value of 1 (so that if you wrote it on a piece of paper there's an X with the coordinate at the center).

#1: We have a linked list, but it is special in that it can have pointers down, as well as next. Any node can have an arbitrary number of links down as well as across. Write a function that will "flatten" this linked list so that it does not have any down pointers, but all elements remain in order.
avatar

2010 Financial Software Developer

Interviewed at Bloomberg

4★
Feb 26, 2010

#1: We have a linked list, but it is special in that it can have pointers down, as well as next. Any node can have an arbitrary number of links down as well as across. Write a function that will "flatten" this linked list so that it does not have any down pointers, but all elements remain in order.

Viewing 841 - 850 interview questions

Glassdoor has 96,396 interview questions and reports from Software developer interviews. Prepare for your interview. Get hired. Love your job.