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 valid way to represent the value null in JavaScript?
A). undefined
B). NULL
C). null
D). None of the above
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
What is the result of the expression undefined + null in JavaScript?
A). undefined
B). null
C). 0
D). Error
What does the Symbol data type represent in JavaScript?
A). A unique identifier
B). A number
C). A boolean value
D). An object
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 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 NaN in JavaScript?
A). Number
B). String
C). Object
D). Undefined
What is the result of the expression true + false in JavaScript?
A). true
B). false
C). 1
D). 0
Which of the following statements is true about JavaScript's null value?
A). It represents an empty string
B). It represents a non-existent value
C). It represents a boolean value
D). It represents a number