Onsite interview 1: A paper test, questions including Java syntax, SQL, JavaScript, code review. Java syntax question is: given a method: int exchange(int a), we need: if a == 1 return 2, if a == 2 return 1. Give 4 methods to implement the method, "if" statement cannot be used. SQL question was about nested queries and aggregation. JavaScript question was to write a JavaScript function, when a radiobox is checked then alert sth. Code review question is an implementation of tree level traverse algorithm, lot of errors.

Question

AN · Accepted Answer

can be done using ternary operator

int result = (input == 1) ? 2 : 1 ;
return result ;

Solver · Answer

3. // using switch
switch(input):
       case 1:
           return 2;
    case 2:
         return 1;

4. return (input%2)+1;

S.K. · Answer

{if a == 1 return 2, if a == 2 return 1} --> { return -i + 3 }

avsa · Answer

// using bit operation
// Assumption is input is always either 1 or 2
int fun(int a)
{  int x = a & 1;
   return x+1;
}

aaki · Answer

return a^3;

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