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Information Technology interview questions

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Interview Questions

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An array of 99 elements contains integers from 1 to 100 with one missing element. Find the missing element.

22 Answers


1. calculate the sum of elements in array say SUM 2. sum of numbers 1 to 100 is(n* (n+1))/2 = 5050 when n==100 3. missing element is (5050-SUM)


Write some pseudo code to raise a number to a power.

10 Answers

Find the second largest element in a Binary Search Tree

16 Answers

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.

8 Answers

Suppose you have a matrix of numbers. How can you easily compute the sum of any rectangle (i.e. a range [row_start, row_end, col_start, col_end]) of those numbers? How would you code this?

6 Answers

Describe and code an algorithm that returns the first duplicate character in a string?

7 Answers

What sort would you use if you required tight max time bounds and wanted highly regular performance.

6 Answers

How do you convince a CIO of a utility to care about energy efficiency?

5 Answers

How many unique handshakes if each person in a group of 10 give handshakes out to each and every other individual. (a) 100 (b) 50 (c) 45 (d) 20 (e) 10

3 Answers

In a given sorted array of integers remove all the duplicates.

6 Answers
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