Redis Strings and Commands

The video tutorial explores Redis strings, a fundamental data type in Redis. It covers their binary-safe nature, practical uses like caching and counters, and how to store and retrieve them. The tutorial also demonstrates caching JSON with expiration and manipulating integers using Redis commands. It concludes with a summary and resources for further learning.

What is a key characteristic of Redis strings?

• They are binary safe sequences of bytes.

• They can only store text data.

• They cannot store serialized JSON.

• They are not binary safe.

Which of the following is a common use of Redis strings?

• Managing user authentication

• Executing complex queries

• Caching API responses

• Storing relational data

Which command is used to store a string in Redis?

• PUT

• SET

• GET

• STORE

How can you retrieve a stored string in Redis?

• By using the FETCH command

• By using the PULL command

• By using the GET command

• By using the RETRIEVE command

What is a benefit of caching JSON responses in Redis?

• It increases the size of the data warehouse.

• It reduces the load on the data warehouse.

• It prevents data from being accessed.

• It makes the data warehouse faster.

What does the EX option in the SET command do?

• It extends the data storage.

• It sets an expiration time for the key.

• It encrypts the data.

• It excludes the key from caching.

Which command is used to increment a numerical value in Redis?

• PLUS

• INCR

• INCREMENT

• ADD

What happens if you use INCR on a non-existent key?

• It throws an error.

• It does nothing.

• It creates the key with a value of 0.

• It creates the key with a value of 1.

How can you decrease a numerical value in Redis?

• By using the DECR command

• By using a negative number with INCRBY

• By using the MINUS command

• By using the SUBTRACT command

What is a key advantage of using Redis strings for numerical manipulation?

• They require complex setup.

• They allow for easy incrementing and decrementing.

• They automatically convert numbers to strings.

• They can only store positive numbers.