Explanation:CURRENT is modifiable. 2. Point out the wrong statement :
A. Variables can hold any BSON type data
B. Aggregation expressions can use both user-defined and system variables
C. To access the value of the variable, use a string with the variable name prefixed with double dollar signs ($$)
D. None of the mentioned
Answer:A
Explanation:CURRENT is modifiable. 2. Point out the wrong statement :
A. Variables can hold any BSON type data B. Aggregation expressions can use both user-defined and system variables C. To access the value of the variable, use a string with the variable name prefixed with double dollar signs ($$) D. None of the mentioned