Simple Node.js interview question

Find output of following code

1) var arr = [1,2,3]
console.log(arr)
output:
   [ 1, 2, 3 ]

2) var arr1={
    "a":1,
    "b":2,
    "c":3
}
console.log(arr1);
output:
{ a: 1, b: 2, c: 3 }

3) var func = function(a,b){
    return a+b;
}
console.log(func);
output:
[Function: func]
4) var obj ={
    add:function(a,b){
        return a+b
    },
    substract:function(a,b){
        return a-b;
    }
}
console.log(obj);
output:
{ add: [Function: add], substract: [Function: substract] }

5) for(a in arr1){
  console.log(a);
}
output:
a
b
c
6) for(a in arr){
    console.log(a);
  }
output:
0
1
2
7) for(a of arr){
   console.log(a);
}
output:
1
2
3
8) var c = 3 in arr
console.log(c);
output:
false
9) var fruits = ["Banana", "Orange", "Apple", "Mango"];
var n = fruits.includes("Mango");
console.log(n);
output:
true
10) var d ={
    add:function (y){
      var x=5;
      function add1(x,y){
          return x+y;
      }
      return add1;
    }
}
console.log(d);
output:
{ add: [Function: add] }

11) can we have func(a)(b) in javascript


function space(a) {
    let b = function (c) {
        return a+c;
    }
    return b;
}


var t = space(7)(6)
console.log(t);

output:13