161. Which command configures a MongoDB Atlas Search analyzer?

• a) Atlas UI/API only
• b) db.createAnalyzer()
• c) mongod --analyzer
• d) db.analyzer.setup()

162. What is the purpose of the $dayOfWeek operator?

• a) Returns weekday number (1=Sunday-7=Saturday)
• b) Groups by workdays
• c) Calculates business days
• d) Validates calendar dates

163. Which method enables MongoDB's SNMP monitoring?

• a) mongod --snmp
• b) db.enableSNMP()
• c) db.snmp.start()
• d) Requires configuration file

164. What does the $isoDayOfWeek operator return?

• a) Weekday number (1=Monday-7=Sunday)
• b) ISO week date
• c) Day number in ISO format
• d) Validates ISO dates

165. Which operator performs case-sensitive string comparison?

• a) $strcasecmp
• b) $cmp
• c) $eq
• d) All of the above

166. What is the purpose of the $count stage?

• a) Returns document count
• b) Creates counters
• c) Limits result size
• d) Groups by quantity

167. Which command lists all MongoDB's current locks?

• a) db.currentOp(true).inprog
• b) db.locks()
• c) show locks
• d) db.serverStatus().locks

168. What does the $substrCP operator do?

• a) Extracts substring by code points
• b) Counts Unicode characters
• c) Validates UTF-8
• d) Splits code pages

169. Which method returns MongoDB's query executor stats?

• a) db.serverStatus().metrics.queryExecutor
• b) db.queryStats()
• c) mongod --queryMetrics
• d) db.getQueryExec()

170. What is the purpose of the $dateFromString operator with timezone?

• a) Parses timezone-aware date strings
• b) Converts between timezones
• c) Validates timezone offsets
• d) Stores UTC timestamps

171. Which operator checks if a field is missing or null?

• a) $ifNull
• b) $exists: false
• c) $or: [ {field:null}, {field:{$exists:false}} ]
• d) $missing

172. What does the $strLenCP operator return?

• a) String length in code points
• b) Byte count
• c) UTF-8 validity
• d) Character encoding

173. Which command lists all Atlas Search indexes?

• a) db.collection.getSearchIndexes()
• b) show searchIndexes
• c) db.listSearchIndexes()
• d) db.search.indexes()

174. What is the purpose of the $toLower operator?

• a) Converts string to lowercase
• b) Normalizes text
• c) Maps to lowercase keys
• d) Filters case-insensitive

175. Which operator checks if arrays have same elements?

• a) $setEquals
• b) $arrayEqual
• c) $sameElements
• d) $identical

176. What does the $abs operator do?

• a) Returns absolute value
• b) Calculates precision
• c) Validates numbers
• d) Abstracts values

177. Which method returns MongoDB's storage engine stats?

• a) db.serverStatus().storageEngine
• b) db.storageStats()
• c) mongod --storageDetails
• d) db.engineInfo()

178. What is the purpose of the $toString operator?

• a) Converts value to string
• b) Validates string format
• c) Serializes objects
• d) Casts to text

179. Which operator checks if value is a number?

• a) $isNumber
• b) $type with numeric types
• c) $number
• d) $numeric

180. What does the $toInt operator do?

• a) Converts value to integer
• b) Truncates decimals
• c) Validates integers
• d) Rounds numbers