Top 5 Basic Programming Question for interview purpose in JS.

Q1. Write a program in JavaScript that accept two integers and display the larger.

Ans.

code :-

var num1,num2;

num1= window.prompt("enter the value of num1");
num2= window.prompt("enter the value of num2");

if(num1>num2)
{
     console.log("num1 is greater");
}
else if( num2>num1)
{
    console.log("num2 is greater");
}
else
{
    console.log("both are equal");
}

Q2. Write a JavaScript for loop that will iterate from 0 to 15. For each iteration, it will check if the current number is odd or even, and display a message to the screen.

Ans.
code :-

for(var x=0; x<=15; x++)
{
    if(x===0)
    {
        console.log(x +"is even ");
    }
    else if(x%2===0)
    {
        console.log(x +"is even");

    }
    else{
        console.log(x +"is odd");
    }
}

Q3. Write a JavaScript program to construct the following pattern, using a nested for loop.

*  
* *  
* * *  
* * * *  
* * * * *  

Ans.  
     code :-

var x,y,r;
for(x=1; x <=6; x++)
{
   for (y=1; y < x; y++)
     {
       r=r+("*");        
      }
 console.log(r);
  r='';    
}

Q4.  Write a JavaScript program to compute the greatest common divisor (GCD) of two positive integers.

Ans.

Code :-

var a=7666;
var b=54;
var gcd;
while(a!=b)
{
    if(a>b)
    {
        a=a-b;
    }
    else
    {
       b=b-a;
    }
}
gcd =a;
console.log(gcd);

Q5. Write a JavaScript conditional statement to sort three numbers. Display an alert box to show the result. 

Ans.

Code :-

var x=0, y=-1 , z=4;
if(x>y && x>z)
{
    if(y>z)
    {
        
        console.log(x+","+y+","+z );
    }
    else
    {
        console.log(x+","+z+","+y );
    }
}

else if(y>x && y>z)
{
    if(x>z)
    {
        
        console.log(y+","+x+","+z );
    }
    else
    {
        console.log(y+","+z+","+x );
    }
}

else if(z>x && z>y)
{
    if(y>x)
    {
        
        console.log(z+","+y+","+x );
    }
    else
    {
        console.log(z+","+x+","+y );
    }

Tanku