Test your basic knowledge |

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Returns all the documents matching the optional properties.






2. Used to represent both a null value and a nonexistent field.






3. Returns all the documents matching the optional properties.






4. Copies an entire database from one name on one server to another name on another server. Omit frmHostName to copy from one name to another on the same server.






5. Operator used in the second argument of the find() call to specify which slice of an array to return for an array field.






6. set of UTF-8 characters.






7. Array specific conditional used to select based on the length or set-size of an array field value.






8. Operator allowing the partial specification of fields in an embedded document in an array.






9. Adds a value to the array only if its not in the array already. Otherwise, if the field is not present, it sets the field to the array value. ex: { $addToSet : { a : { $each : [ 3 , 5 , 6 ] } } }






10. A document contained by a parent document. The embedded document is a value of a key in the parent document.






11. Not equal query conditional. ex: db.<col>.find({numVal: {$ne:3}});






12. Removes all occurrences of each value in the passed in array from the field. ex: { $pullAll : { field : value_array } }






13. Returns help information for a command.






14. Does not contain query conditional used to select documents with the field that is not in the selector list of values.






15. Command to get help docs on a specific command at the db level.






16. String of arbitrary bytes.






17. Appends each value in the value_array to the field - if field is an existing array. Otherwise - it sets the field to the array value_array - if field is not present ex: { $pushAll : { field : value_array } }






18. Binary-encoded serialization of mongo documents.






19. Meta query conditional generating a modulus with the selector operand. Checks to see if the field value when divided by one value has the remainder of the second value.






20. Operator allowing the execution of arbitrary javascript as part of the selector.






21. Renames a field from the one indicated to the new field name. ex: { $rename : { old_field_name : new_field_name } }






22. The local variable representation of a query. Uniquely - the cursor does not hold the results but instead access to the results.






23. Removes an element from an array based on the value of the field option being 1 or -1 for last or first element respectively. ex: { $pop : { field : -1 } }






24. Clone the current database (implied by 'db') from another host.






25. Array specific conditional allowing matching on multiple elements within an array. The operation is non strict on the sequence of the values in the passed selector array.






26. Stored as milliseconds since the epoch.






27. command to start the mongodb process.






28. command to start the mongo shell.






29. command to start the mongo shell.






30. changes the database on which you are working.






31. Contains query conditional used to check if a value contains the field value.






32. Returns help information for a command.






33. Special keys passed in an update call to specify complex update operations - such as alter - adding - or removing keys - and even manipulating arrays and embedded documents.






34. Flushes all pending writes to data files. The lock option allows one to safely snapshot the database's data files. The async option returns focus to the console immediately while the task runs in the background.






35. Standard binary data type.






36. Not supported by the javascript shell and are converted to 64-bit floating point numbers.






37. Deletes documents from the collection based on the selector.






38. The standard number representation in the javascript shell.






39. In BSON - represents the largest possible value.






40. Updates all matching documents, not just the first, that match the selector.






41. Update modifier that set the value of a key and if the key does not exist, it will create the key. ex: db.<col>.update({selector},{"$set":{"someKey":"someValue"}});






42. Update a document in the collection.






43. Data structure used to store all other data in mongo databases.






44. ...






45. Query conditional allowing the selector to choose between more than one optional criteria.






46. Meta query conditional used to negate the selector.






47. Command to get help docs on a specific command at the collection level.






48. Returns the size of a document after it is converted to BSON from the JSON-like original.






49. Command to list commands and descriptions of those commands in the context of the database.






50. Creates an index on property(s). Options can describe the type of sorting, uniqueness, etc.







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests