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Question

Point out the correct statement.

a.

To access variables in expressions, use a string that prefixes the variable name with $$$

b.

Expressions can include field paths and system variables, literals, expression objects, and expression operators

c.

To specify a field path, use a string that prefixes with a dollar sign % the field name or the dotted field name

d.

All of the mentioned

Posted under MongoDB

Answer: (b).Expressions can include field paths and system variables, literals, expression objects, and expression operators

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