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Questions and Answers
What is the purpose of the command: db.transport.find({Max_speed: {$eq:250}}).pretty()?
What is the purpose of the command: db.transport.find({Max_speed: {$eq:250}}).pretty()?
- To display vehicles with any speed less than 250
- To display vehicles with a minimum speed of 250
- To display vehicles with any speed greater than 250
- To display vehicles with a maximum speed of 250 (correct)
What is the significance of using the $and operator in the command: db.transport.find({$and: [{Max_speed:{$lt:500}}, {Brand:{$eq:'Benz'}}]})?
What is the significance of using the $and operator in the command: db.transport.find({$and: [{Max_speed:{$lt:500}}, {Brand:{$eq:'Benz'}}]})?
- It retrieves all vehicles with any speed, regardless of the brand
- It retrieves all vehicles with a speed exactly equal to 500 and brand 'Benz'
- It retrieves all vehicles with a speed less than 500 and brand 'Benz' (correct)
- It retrieves all vehicles with a speed greater than 500 and brand 'Benz'
What is a key characteristic of MongoDB as mentioned in the text?
What is a key characteristic of MongoDB as mentioned in the text?
- It is written in Java programming language
- It is a relational database
- It is a document-oriented database (correct)
- It uses structured query language (SQL)
What is the role of a 'database' in MongoDB?
What is the role of a 'database' in MongoDB?
Which company was involved in the development and support of MongoDB?
Which company was involved in the development and support of MongoDB?
What type of programming language is MongoDB written in?
What type of programming language is MongoDB written in?
What is the main characteristic of a MongoDB collection?
What is the main characteristic of a MongoDB collection?
Which statement best describes the dynamic schema feature of MongoDB documents?
Which statement best describes the dynamic schema feature of MongoDB documents?
What is one advantage of storing data in a document-oriented database like MongoDB?
What is one advantage of storing data in a document-oriented database like MongoDB?
Why was MongoDB developed as an open-source database server by MongoDB Inc. in 2009?
Why was MongoDB developed as an open-source database server by MongoDB Inc. in 2009?
Which version of MongoDB marked its first ready production release in March 2010?
Which version of MongoDB marked its first ready production release in March 2010?
What is the primary purpose of building MongoDB as mentioned in the text?
What is the primary purpose of building MongoDB as mentioned in the text?
