Answer & Solution
Answer: Option B
Solution:
JavaScript performs implicit type conversion (coercion) when adding a number and a string, resulting in a string concatenation.
Q
What is the result of the expression 5 + '5' in JavaScript?
Related Questions on Average
Which of the following is a primitive data type in JavaScript?
A). Array
B). Object
C). Function
D). String
What is the default value of a variable in JavaScript if it is not initialized?
A). null
B). undefined
C). 0
D). 'undefined'
What is the result of the expression true + false in JavaScript?
A). true
B). false
C). 1
D). 0
What happens when you add two numbers using the + operator in JavaScript?
A). The numbers are concatenated
B). The numbers are multiplied
C). The numbers are added
D). An error occurs
Which primitive value represents absence of value or no value assigned?
A). undefined
B). null
C). 0
D). 'undefined'
What is the result of the expression true == 1 in JavaScript?
A). true
B). false
C). Error
D). 1
What is a primitive value in JavaScript?
A). A complex data structure
B). A basic data type
C). A function
D). An array
Which of the following is a valid way to represent the value null in JavaScript?
A). undefined
B). NULL
C). null
D). None of the above
What happens when you try to access a variable that has not been declared in JavaScript?
A). SyntaxError is thrown
B). ReferenceError is thrown
C). TypeError is thrown
D). Undefined
What is the data type of the value undefined in JavaScript?
A). String
B). Object
C). Undefined
D). Number