Which statement about the KTable's database table analogy is true?

Which statement about the KTable's database table analogy is true?

• A. KTable is interpreted as an UPDATE statement.
• B. KTable is interpreted as an INSERT statement.
• C. KTable is interpreted as a DELETE statement.
• D. KTable is interpreted as a MERGE statement.

Answer: (A)

KTable represents a mutable view of a table where each key has a single current value. As new records arrive for a key, the KTable updates that key’s value in place, just like applying an UPDATE to the row identified by that key in a relational database. This is why the database-table analogy centers on updating existing rows rather than merely appending new ones. If a key appears for the first time, you effectively create that row (an INSERT), and if you see a tombstone (a null value), that deletes the row, but the typical emphasis is on updating the existing state for that key. So, the statement that KTable is interpreted as an UPDATE statement best matches this behavior.

KTable represents a mutable view of a table where each key has a single current value. As new records arrive for a key, the KTable updates that key’s value in place, just like applying an UPDATE to the row identified by that key in a relational database. This is why the database-table analogy centers on updating existing rows rather than merely appending new ones. If a key appears for the first time, you effectively create that row (an INSERT), and if you see a tombstone (a null value), that deletes the row, but the typical emphasis is on updating the existing state for that key. So, the statement that KTable is interpreted as an UPDATE statement best matches this behavior.