Test Your JavaScript Fundamental (Part 1)

let yy = 10;

console.log(++yy);

console.log(yy++);

console.log(yy);

• 11
  12

  10

• 11

  12

  12

• 11

  12

  13

• 11
  11
  12

let aa = "10";

console.log(aa++);

console.log(++aa);

console.log(aa);

• 10

  12

  12

• 11

  12

  10

• 11

  11

  10

• undefined

let s = [1, 9, 7, 100, 2, 99, 88, 20];

s.splice(2, 4, 91, 92, 93);

console.log(s);

• [1, 9, 91, 92, 93, 88, 20]

• [1, 91, 92, 93, 99, 88, 20 ]

• [1, 9, 7, 20, 91, 92, 93]

• [1, 9, 7, 91, 92 , 93, 20]

const arrs = [1, 2, 3];

const { log } = console;

log(arrs.push(4));

• [1, 2, 3, 4]

• error

• 4

• [1, 2 , 3]

console.log(0.2 + 0.3 === 0.5);

• true

• false

• error

• NaN

const arrHewan = ["ayam", `berang"`, "kambing"];

for (let i = 0; i < arrHewan.length; i++) {

console.log(arrHewan[i]);

}

• ayam
  berang"

  kambing

• kambing

• error

• undefined

let multiply = (a, b) => a * b;

let square = (n) => multiply(n, n);

let printSquare = (n) => {

let squared = square(n);

console.log(square(n));

console.log(squared);

};

printSquare(5);

• 25
  25

• undefined
  25

• 25
  undefined

• error

const str = "JavaScript";

const pindah = str;

if (str === "JavaScript") {console.log(pindah, "ini if else");}

else console.log("Salah");

• ini if else

• JavaScript ini if else

• Salah

• error

const baru = "new";

const baru = "baru";

console.log(baru);

• "baru"

• "new"

• barunew

• error

let arr = [1,2,3,4]

let x = 2 *2;

for (let i = 0; i < 10; i++)

Big O Notation?

• O(1)

• O(n)

• O log n

• O (N^2)