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1.
What is the output of the following MongoDB code:
> db.users.ensureIndex({
"tags": 1
})
"tags": 1
})
2.
Match the following.
w) String i) Not Zero
x) Boolean ii) True or False
y) Object iii) Combination of characters
z) Null iv) Entity
w) String i) Not Zero
x) Boolean ii) True or False
y) Object iii) Combination of characters
z) Null iv) Entity
3.
In MongoDB, which of these is equivalent to the following statement:
Select * from tablename order by bonus desc;
4.
In MongoDB, which of these commands is equivalent to the following statement:
Select last_name,salary,date_of_leave from employees where designation=”Developer”;
5.
What is the output of the following MongoDB code:
db.employer.ensureIndex({
"profile": 1
}
`)
"profile": 1
}
`)
6.
Which of these is equivalent to the following SQL query in MongoDB:
SELECT * FROM emp WHERE author like "%piyu%"
7.
How will you drop the index created in the following MongoDB code:
> use demo
> db.users.ensureIndex({“
key”: 5
})
> db.users.ensureIndex({“
key”: 5
})
8.
In MongoDB, match the following BSON types with their descriptions:
w) String i) Not Zero
x) Boolean ii)True or False
y) Object iii) Combination of characters
z) Null iv) Entity
w) String i) Not Zero
x) Boolean ii)True or False
y) Object iii) Combination of characters
z) Null iv) Entity
9.
Which of these about OR condition in MongoDB is correct?
10.
In MongoDB, which of the following commands creates an index where id_no is a field in the collection libraries?