Answer & Solution
Answer: Option B
Solution:
<div>Adding a number and a string in JavaScript results in a concatenated string, so '10' + '5' becomes '105'.</div>
Q
What will be the result of 10 + '5' in JavaScript?
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What will be the output of '5' + 2 - 1 in JavaScript?
A). '52'
B). 6
C). '4'
D). Error
What does the operator
A).
B). do in JavaScript?
C). Logical AND
D). Logical OR
What will be the output of '7' - 3 in JavaScript?
A). 4
B). '4'
C). NaN
D). Error
What will be the result of 3 * 'A' in JavaScript?
A). Error
B). NaN
C). 0
D). 3
What does the unary operator + do to a string in JavaScript?
A). Concatenates it
B). Ignores it
C). Converts it to a number
D). Throws an error
What is the result of '20' - 10 in JavaScript?
A). 10
B). '10'
C). NaN
D). 20
What does the operator === do in JavaScript?
A). Checks for equality without type conversion
B). Assigns a value
C). Performs a strict comparison
D). Concatenates strings
What will be the value of x after executing the code: let x = 5; x += '2';?
A). 7
B). '72'
C). 52
D). NaN
What is the purpose of the % operator in JavaScript?
A). Exponentiation
B). Division
C). Modulus
D). Concatenation
What will be the output of 20 / '5' in JavaScript?
A). 4
B). NaN
C). Infinity
D). Error