JavaScript Operators and Precedence Quiz

Topics: Assignment, Comparison, Arithmetic, Bitwise, Ternary, Logical, and Unary operators

JavaScript Operators and Precedence

5 mins read

1. What is the output?

 let num = 8;
 let multiplier = 2;
 num *= multiplier += 3;
 console.log(num);

2. What is the output?

  let a = "Hello";
  let b = "hello";
  let result = a < b;
  console.log(result);

3. What is the output?

 let x = true;
 let y = 5;
 let result = x && (y > 10);
 console.log(result);

4. What is the output?

 let name = "John";
 let fallbackName = "Anonymous";
 let result = name ?? fallbackName ?? "Guest";
 console.log(result);

5. What is the output?

  let x = undefined;
  let y;
  let result = x === y;
  console.log(result);

6. What is the output?

 let x = 5;
 let y = 3;
 x += y *= 2;
 console.log(x);

7. What is the output?

 let price = 10;
 let discount = null;
 let finalPrice = price - (discount ?? 0);
 console.log(finalPrice);

8. What is the output?


 let y = "Hello";
 let result = y && "World";
 console.log(result);

9. What is the output?

 let x;
 let result = x !== null ? x : "Default";
 console.log(result);

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