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
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;
Which assignment operator is used to perform multiplication and assignment in one step?
A). =*
B). *=
C). **=
D). //=
What does the += operator do?
A). Adds and assigns
B). Subtracts and assigns
C). Multiplies and assigns
D). Divides and assigns
What is the result of let a = 5; a %= 2;?
A). 1
B). 2
C). 0
D). 5
Which operator would you use to shift bits to the right and assign the result?
A). >>>=
B). >>=
C). <<=
D). &=
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
What will be the value of x after let x = 5; x -= 2;?
A). 7
B). 2
C). 3
D). 5
What is the value of let a = 5; a *= 2 + 3;?
A). 25
B). 10
C). 15
D). 5
What is the result of `let x = 10; x
A).
B). = 5;`?
C). 10
D). 5
What will be the value of c after `let c = 5; c
A). = 3;`?
B). 1
C). 3
D). 7