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 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
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 is the value of let a = 5; a *= 2 + 3;?
A). 25
B). 10
C). 15
D). 5
What will be the value of b after let b = null; b ??= 'default';?
A). null
B). 'default'
C). undefined
D). NaN
Which operator would you use to shift bits to the right and assign the result?
A). >>>=
B). >>=
C). <<=
D). &=
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;
What will be the value of d after let d = true; d &&= false;?
A). 1
B). 0
C). NaN
D). undefined
What does let a = 2; a **= 3; evaluate to?
A). 8
B). 6
C). 5
D). 2
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 is the result of `let x = 10; x
A).
B). = 5;`?
C). 10
D). 5