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Easier questions 1) Two variations of a program exist, A and B. When run on machine 1, A runs twice as fast as B. When run on machine 2, A runs 10x as fast as B. How would you investigate this? -same datasets -same versions of OS and libraries -same hardware 2) Had to code a method that calculated the factorial, first simply, then a second one recursively.
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Software Engineer

Interviewed at Google

4.4★
Mar 8, 2010

Easier questions 1) Two variations of a program exist, A and B. When run on machine 1, A runs twice as fast as B. When run on machine 2, A runs 10x as fast as B. How would you investigate this? -same datasets -same versions of OS and libraries -same hardware 2) Had to code a method that calculated the factorial, first simply, then a second one recursively.

Round 1 Given a bitmap, use a quaTree data structure to represent the bitmap. The maps are all squares with black or white pixels and the length of the map is 2^n (you can always divide the map into 4 smaller parts). Then give you a root node of a quaTree, calculate the total black pixel in this map. Follow up: Given two root node, generate the intersection of these two maps.
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Software Engineer

Interviewed at Google

4.4★
Oct 14, 2015

Round 1 Given a bitmap, use a quaTree data structure to represent the bitmap. The maps are all squares with black or white pixels and the length of the map is 2^n (you can always divide the map into 4 smaller parts). Then give you a root node of a quaTree, calculate the total black pixel in this map. Follow up: Given two root node, generate the intersection of these two maps.

Only one programming questions. Input a string, including numbers, operands, and brackets. Calculate the result. Test case: input: "(+ 3 3)": Output: 6 input "(* 3 3)" Output: 9 input: "(+ 1 12 (- 17 3) 5 (* 2 8 (/ 120 4)) 46)", Output: 1 + 12 + (17 - 3) + 5 + (2 * 8 * (120 / 4)) + 46 = 558
avatar

Software Engineer

Interviewed at Google

4.4★
Feb 3, 2016

Only one programming questions. Input a string, including numbers, operands, and brackets. Calculate the result. Test case: input: "(+ 3 3)": Output: 6 input "(* 3 3)" Output: 9 input: "(+ 1 12 (- 17 3) 5 (* 2 8 (/ 120 4)) 46)", Output: 1 + 12 + (17 - 3) + 5 + (2 * 8 * (120 / 4)) + 46 = 558

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