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Senior C Developer Interview Questions

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Sequence of numbers in random order and 1 of them is missing how to find that out...

5 Answers

N(N+1)/2 - sum of the input = missing number

It isn't stated that sequence starts from 1. The sequence could be 8,9,5,6!

If the sequence is guaranteed to contain only positive integers, it can be done like so: Read in the sequence, noting the MIN and MAX numbers. The sum IF it started from 1 would be MAX(MAX-1)/2. The sum of the 'missing' numbers (from 1 up to where the sequence actually starts) is (MIN-1)*MIN/2. The missing number is given by taking the difference between the two: X = [MAX*(MAX-1) - (MIN-1)*MIN]/2.

5 adjacent parking spots. whats the probability 2 cars next to each other

2 Answers

how does a reference counting smart pointger work?

1 Answer

well all questions are expected, string reverse without reversing words for example " this is sentence" => "sentence is this", write c++ code to do so

2 Answers

What is the best case lookup time for a hash table?

1 Answer

How can you make a program print out "Hello World" before entering the main() function?

1 Answer

Very simply question of inserting latest 5000 records in container along with timestamp and retrieve them as needed and discard which are older then 5000.

1 Answer

What 4 functions are automatically generated for a class by the c++ compiler?

1 Answer

When is Bubblesort faster than Quicksort

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