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MISSING VALUE Interview Questions
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N points lie on a circle. You draw lines connecting all the points to each other. These lines divide up the circle into a number of regions. How many regions is this? Assume that the points are scattered in such a way as to give the maximum number of regions for that N.
3) Poker. 26 red, 26 black. Take one every time, you can choose to guess whether it’s red. You have only one chance. If you are right, you get 1 dollar. What’s the strategy? And what’s the expected earn?
class A { public A() { foo(); } public void foo() { System.out.println("Class A"); } } class B extends A { public B(){} public void foo() { System.out.println("Class B"); } } class main { public static void main(String[] args) { A a = new B(); } } What does it print? Class A or Class B?
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Given two strings representing integer numbers ("123" , "30") return a string representing the sum of the two numbers ("153")
There is a table that tracks every time a user turns a feature on or off, with columns user_id, action ("on" or "off), date, and time. How many users turned the feature on today? How many users have ever turned the feature on? In a table that tracks the status of every user every day, how would you add today's data to it?
You have datastructure my $users = [ { name => 'John', score => 10, }, { name => 'Bob', score => 1, }, { name => 'Carlos', score => 5 }, { name => 'Alice', score => 5, }, { name => 'Donald', score => 7 } ]; now u have to arrange the name with highest to lower score, if score is same than in alphabetical order #expected output: # John # Donald # Alice # Carlos # Bob
Determine if an array from 1..n has a duplicate in constant time and space.
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