list.insert() — Python Technical Interview Questions & Answers

list.insert()

list.insert()

  • list.insert() is about talking to a database from Python. Pattern is always: connect → cursor → execute → fetch or commit → close.
  • For list.insert(): use ? placeholders (or the driver’s params). Never build SQL with + user text — that is injection. sqlite3 is in the stdlib for practice; MySQL/Mongo need a driver.
  • list.insert() on the board: insert Asha, select her back, print the name. Same idea on MySQL. Close the connection.
  • list.insert() — output: ['Asha', 'Ravi', 'Neha']. insert at index 1.
  index →  0       1       2
  list  → [Asha,  Ravi,  Neha]

Technical Interview Tip: Steps in order: connect → execute → fetch/commit → close. Mention placeholders.

Code Examples for list.insert()

Example

# list.insert()
a = ["Asha", "Neha"]
a.insert(1, "Ravi")
print(a)

list.insert() — output: ['Asha', 'Ravi', 'Neha']. insert at index 1.

How to Explain list.insert() to an Interviewer

Explain list.insert() as if you are teaching a junior — definition, then one tiny script.

list.insert() uses connect + cursor + SQL/API. list.insert() — parameterized queries. Never + user text into SQL.

What does the example print, and why?

list

What mistake do freshers make with list.insert()?

list.insert() — commit after write. close when done.