MongoDB Online Test

1. mongo

2. mongodb

3. dbmong

4. None

Correct Answer : A

1. Multikey Index

2. Compound Index

3. Text Index

4. Sparse Index

Correct Answer : A

1. show db

2. show dbs

3. show data

4. display dbs

Correct Answer : B

1. 4

2. 3

3. 2

4. 1

Correct Answer : B

1. collection

2. collation

3. heap

4. none of the mentioned

Correct Answer : B

1. CRUD

2. GRID

3. READ

4. All of the mentioned

Correct Answer : A

1. primary

2. secondary

3. composite

4. all of the mentioned

Correct Answer : A

1. selection

2. projection

3. union

4. none of the mentioned

Correct Answer : B

1. Timeout

2. noTimeout

3. Time

4. None of the mentioned

Correct Answer : B

1. Yes

2. No

Correct Answer : B

1. mongos

2. mongod

3. logpath

4. syspathlog

Correct Answer : B

1. while (var i = 1; i <= 25; i++) 
   {
        db.testData.insert( { x : i } )
   }

    

2. for (var i = 1; i <= 25; i++) 
   {
      db.testData.insert( { x : i } )
   }

    

3. for (var i = 1; i <= 25; i++)
   {
      db.testData.inserts( { x : i } )
   }

    

4. None of the mentioned

Correct Answer : B

1. graph

2. key value

3. document

4. all of the mentioned

Correct Answer : C

1. Variables can hold any BSON type data

2. Aggregation expressions can use both user-defined and system variables

3. To access the value of the variable, use a string with the variable name prefixed with double dollar signs ($$)

4. None of the mentioned

Correct Answer : C

1. _id

2. Ob_id

3. id

4. None of the above

Correct Answer : A

1. UPDATE

2. OP_UPDATE

3. OP_UPDATES

4. All of the mentioned

Correct Answer : B

1. 2MB

2. 16MB

3. 12MB

4. No limit.Depends on RAM

Correct Answer : B

1. SQL

2. MongoDB

3. CASSANDRA

4. None of the above

Correct Answer : A

1. show collection

2. show collections

3. show collect

4. none of the mentioned

Correct Answer : B

1. mongod

2. mongos

3. mongo

4. mongoc

Correct Answer : A

1. use dbs

2. use db

3. use mydb

4. use mydbs

Correct Answer : C

1. vertical

2. sharded

3. horizontal

4. none of the mentioned

Correct Answer : B

1. cursor()

2. find()

3. findc()

4. none of the mentioned

Correct Answer : B

1. map

2. reduce

3. mapper

4. all of the mentioned

Correct Answer : A

1. $unwindelem

2. $unwind

3. $unwin

4. None of the mentioned

Correct Answer : C

1. machineID

2. processID

3. counter

4. documentID

Correct Answer : D

1. explainstats()

2. explain()

3. explainall()

4. all of the mentioned

Correct Answer : B

1. emit()

2. emitter()

3. emitted()

4. none of the mentioned

Correct Answer : A

1. MongoDB

2. JSON

3. CASSANDRA

4. Both A and C

Correct Answer : D

1. Create a text index on each field.

2. MongoDB is not able to do this.

3. Create a compound text index using both fields.

4. Create a text index on one field and a single field index on the other.

Correct Answer : A