Interview Questions And Answers 
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You have 2 arrays each containing a set of numbers. Write an algorithm that gets the elements present in the first array and missing from the second. It should have n complexity.
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(23 votes, avg: 4)
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There are set of ip address set of the form
10.10.10.10 - 20.20.20.20 -> cable, USA
20.20.20.21 - 33.32.31.30 -> DSL, Germany
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250.250.250.250 - 256.256.256.256 -> cable, FranceWhich indicates all ip addresses between 10.10.10.10 to 20.20.20.20 are of type ‘cable’ and belong to the country USA, similarly with other ip address set.
Question:
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Arrange this data into a data structure in such a way that given an ip address (e.g. 21.21.21.21) retrieve the type of service (cable, DSL.. ) and country (USA, Getrmany..) in the fastest possible way.Note: the number of such ip address sets could be very large. Also for every ip address between the start(10.10.10.10) and end (256.256.256.256) there is a type and country associated.
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(30 votes, avg: 4.27)
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1) Write a function int round(float x) to round off a floating point num to int.
2)Write a program to swap two integer pointers.
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(41 votes, avg: 3.22)
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You need to multiply say, 5123 x 3333 (yes, it’s an obvious example) without using calculator etc. How would you go about doing it?
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(18 votes, avg: 3.67)
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Spiral Traversal - If you were given an array like:
A B C D E
1 2 3 4 5
A B C D E
1 2 3 4 5
The output should be: ABCDE5E54321A1234DCBneed a program for this…
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(30 votes, avg: 3.5)
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Write a routine that prints out a 2-D array in spiral order.
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(13 votes, avg: 4.54)
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Write a function that finds the last instance of a character in a string.
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(15 votes, avg: 3.13)
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Write a function to compute the factorial of a given integer.
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(22 votes, avg: 3.59)
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Write a function to find the nth item from the end of a linked list in a single pass.
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(29 votes, avg: 3.21)
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Write an algorithm to draw a 3D pie chart ?
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(17 votes, avg: 3.18)
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