What will be the output of let { a, b } = { a: 1, b: 2, c: 3 };?

How do you assign default values in destructuring?

A). let { a, b } = { a: 1 };

B). let { a = 1, b = 2 } = {};

C). let [a, b] = [1, 2];

D). let { a, b } = { a: 1, b: 2 };

What will let x = 5, y = 10; [x, y] = [y, x]; do?

A). Nothing

B). Throws an error

C). Swaps values of x and y

D). None of the above

Can a constant objects properties be changed?

A). Yes

B). No

C). Only if redeclared

D). Only with special methods

What does let { a: alpha, b: beta } = { a: 1, b: 2 }; do?

A). Creates variables alpha and beta with values 1 and 2

B). Creates variables a and b with values 1 and 2

C). Throws an error

D). Assigns default values

What does the assignment operator = do in JavaScript?

A). Compares two values

B). Assigns a value to a variable

C). Checks for equality

D). None of the above

How can you swap the values of two variables a and b in one line?

A). [a, b] = [b, a]

B). a = b, b = a

C). a == b, b == a

D). a === b, b === a

What is the outcome of let x = 8; x %= 3;?

A). 1

B). 2

C). 3

D). 5

Which operator assigns a remainder to a variable?

A). +=

B). -=

C). *=

D). %=

Which of the following is the assignment operator in JavaScript?

A). =

B). ==

C). ===

D). !=

What is the result of let x = 10; x -= 3;?

A). 7

B). 13

C). 10

D). 3