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MongoDB MCQs

Suppose we have a collection of users with different ages. Which of the following calls will find the oldest person with the name John?

db.users.aggregate({$match: {name: "John"}}).sort({age: -1}).limit(1);

db.users.aggregate({$select: {name: "John"}}, {$sort: {age: -1}}, {$limit: 1});

db.users.aggregate({$select: {name: "John"}}, {$sort: {age: -1}}).limit(1);

db.users.aggregate({$match: {name: "John"}}, {$sort: {age: -1}}, {$limit: 1});

Answer

Correct Answer: db.users.aggregate({$match: {name: "John"}}, {$sort: {age: -1}}, {$limit: 1});

Explanation:

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