nosql quiz 100% verified

nosql quiz 100% verified


What method instructs the server to not timeout a cursor automatically after a period of
inactivity? (Choose one)

a. cursor.noCursorTimeout()

b. cursor.readConcern()

c. cursor.objsLeftInBatch()

d. cursor.readPrefcursor.pretty() - ANSWER a. cursor.noCursorTimeout()



Using the MongoDB shell, how do you drop the customer collection and its indexes?

a. db.customers.remove( {} );

b. db.customers.delete();

c. db.customers.remove( {} ).indexes();

d. db.customers.drop();

e. none of the above - ANSWER d. db.customers.drop();



What returns TRUE if the cursor returned by the db.collection.find() query can iterate
further to return more documents? (Select one)

a. cursor.hasNext()

b. cursor.next()

c. cursor.toArray()

d. db.collection.find()

e. cursor.forEach() - ANSWER a. cursor.hasNext()



You will be performing a series of updates to multiple records. You find setting the multi
option of the update() command too tiresome. What should you do instead?

a. all answers correct

, b. Use the replaceMany() command instead

c. Use the updateMany() command instead

d. Set the global multi option to True

e. Use the updateMulti() command instead - ANSWER c. Use the updateMany()
command instead



What does iterate the cursor to apply a JavaScript function to each document from the
cursor? (Select one)

a. cursor.next()

b. cursor.toArray()

c. cursor.hasNext()

d. cursor.forEach()

e. db.collection.find() - ANSWER d. cursor.forEach()



Which of the following line skips the first 5 documents in the bios collection and returns
all remaining documents?

a. db.bios.find().skip(1)

b. db.bios.find().sort(5)

c. db.bios.find().skip(5)

d. all answers correct

e. db.bios.find().limit(5) - ANSWER c. db.bios.find().skip(5)



Which of the following can be called on a cursor object?

a. cursor.hasNext()

b. cursor.forEach()

c. all answers correct

d. cursor.next()

e. All of the presented - ANSWER c. all answers correct