Cracking the coding interview | Step-2

DAY 2:coding interview questions

Question 1:

Is N an exact multiple of M?

Write a function that accepts two parameters and finds whether the first parameter is an

exact multiple of the second parameter. If the first parameter is an exact multiple of the

second parameter, the function should return 2 else it should return 1. If either of the

parameters is zero, the function should return 3.

Assumption: Within the scope of this question, assume that -

- the first parameter can be positive, negative or zero

- the second parameter will always be >=0

//Code:

import java.io.*;
import  java.util.*;
class UserMainCode{
public int isMultiple(int input1,int input2){ 

if(input1==0 || input2==0) 

   return 3; 

else if(input1%input2==0)   

   return 2; 

else 

   return 1;

}}

Question 2:

Of the given 5 numbers, How many are even?

Write a function that accepts 5 input parameters and returns the count of how many those 5 

are even.

For example,

If the five input parameters are 12, 17, 19, 14, and 115, there are two even numbers 12  and 

14. So, the function must return 2.

Similarly,

If the five input parameters are 15, 0, -12, 19, and 28, there are three even numbers 0, -12, 

and 28. So, the function must return 3.Observe that zero is also considered an even number.

//Code:

import java.io.*;
import  java.util.*;
class UserMainCode{ 

public int countEvens(int input1,int input2,int input3,int input4,int input5){

 int count=0;  
if(input1%2==0)  
 count++;
 if(input2%2==0)   
    count++;  
if(input3%2==0)  
   count++;  
if(input4%2==0)   
   count++;  
if(input5%2==0)   
  count++;  

return count; 

}}

Question 3:

Of the given 5 numbers, How many are odd?

Write a function that accepts 5 input parameters and returns the count of how many those 
5 are odd.
For example,
If the five input parameters are 12, 17, 19, 14, and 115, there are three odd numbers 17 and 
19 and 115. So, the function must return 3.
Similarly,
If the five input parameters are 15, 0, -12, 19, and 28, there are two odd numbers 15 and 19.
So, the function must return 2.Observe that zero is also considered an even number

//Code:

import java.io.*;

import  java.util.*;

class UserMainCode{ 

public int countEvens(int input1,int input2,int input3,int input4,int input5){  

  int count=0;  
    if(input1%2!=0)   
       count++;  

     if(input2%2!=0)   
       count++;  
     
     if(input3%2!=0)   
        count++;
  
     if(input4%2!=0)   
       count++;  
     if(input5%2!=0)   
       count++;  
    
     return count; 

    }}

Question 4:

Of the given 5 numbers, How many are even or odd?

Write a function that accepts 6 input parameters. The first 5 input parameters are of type int.
The sixth input parameter is of type string. If the sixth parameter contains the value "even", 
the function is supposed to return the count of how many of the first five input parameters are
even. If the sixth parameter contains the value "odd", the function is supposed to return the
count of how many of the first five input parameters are odd.
For example,
If the five input parameters are 12, 17, 19, 14, and 115, and the sixth parameter is "odd",
the function must return 3 because there are three odd numbers 17, 19, and 115.

If the five input parameters are 12, 17, 19, 14, and 115, and the sixth parameter is "even", the
the function must return 2 because there are two even numbers 12 and 14.

Note that zero is considered an even number.

//Code:

import java.io.*;
import  java.util.*;
class UserMainCode
{
 public int countEvensOdds(int input1,int input2,int input3,int input4,int input5,String input6){
  int count=0;
  if(input1%2==0)
   count++;
  if(input2%2==0)
   count++;
  if(input3%2==0)
   count++;
  if(input4%2==0)
   count++;
  if(input5%2==0)
   count++;
  if(input6.equals("even"))
   return count;
  else
   return 5-count;
 }

}

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