Answer & Solution
Answer: Option C
Solution:
The ??= operator assigns the right operand to the left operand only if the left operand is null or undefined.
Q
What does the ??= operator do?
Related Questions on Average
What is the result of let a = 5; a %= 2;?
A). 1
B). 2
C). 0
D). 5
How do you write an assignment statement to decrement a by 1 in JavaScript?
A). a =- 1;
B). a -= 1;
C). a == -1;
D). a = 1;
How does the &= operator work in JavaScript?
A). Performs a logical AND
B). Performs a bitwise AND
C). Performs a bitwise OR
D). Performs a logical OR
How does the ^= operator work in JavaScript?
A). Performs a logical XOR
B). Performs a bitwise XOR
C). Performs a logical AND
D). Performs a bitwise AND
What will be the value of a after let a = 5; a /= 2;?
A). 2
B). 5
C). 10
D). 0
How do you write an assignment statement to increment a by 3 in JavaScript?
A). a += 3;
B). a = 3;
C). a == 3;
D). a + 3;
What does let a = 10; a >>= 2; evaluate to?
A). 2
B). 4
C). 10
D). 5
What is the result of `let x = 10; x
A).
B). = 5;`?
C). 10
D). 5
What does let e = 6; e <<= 1; evaluate to?
A). 3
B). 12
C). 6
D). 7
What does the += operator do?
A). Adds and assigns
B). Subtracts and assigns
C). Multiplies and assigns
D). Divides and assigns