In SQL, the DROP TABLE command is used to remove a table from the database. When you execute DROP TABLE, it deletes the table along with all its data, indexes, triggers, constraints, and permissions. It should be used with caution as it permanently removes the table and all associated objects from the database.

1. When the Tab key is pressed, 4 space characters are inserted.

2. The following are the tasks performed by the keyboard-

- With its help, alpha-numerical data is easily input into the computer.

- In the absence of a mouse, many of the tasks done by the mouse can be done.

- Through this, commands are given to the computer.

- By using the combination of buttons (shortcut keys) present in it, many operations can be performed, which saves a lot of time.

- Apart from this, tasks like playing games, controlling music etc. can be done.

1. A modem is used to connect the computer to the Internet through a phone line.

2. A modem converts digital information from your computer into analog signals that can be transmitted over wires (and vice versa).

The search engine performs the following tasks-

1. Web crawling: Search engines search all web pages on the web using a crawler. A crawler is a program that finds new web pages by following links on the web.

2. Indexing: Once the crawler finds all the web pages, the search engine indexes them in a database. The index contains information for each web page, such as title, URL, and content.

3. Searching: When a user types a search query, the search engine searches all the web pages in the index that may be related to the query.

1. The output printed from the computer is called a hard copy.

2. “When we see any text or image or any design inside any computer software, then to make that design or text a document, with the help of a printer, with the help of a hard copy generator. If it is printed on paper, then that printed paper is called a Hard Copy”.