The Full Stack Web Development - String Commands

This video tutorial explores advanced Redis CLI commands, building on basic commands like SET and GET. It covers the use of MSET and MGET for handling multiple values, MSET NX for conditional setting, and SETEX and PSETEX for setting values with expiration times. The tutorial also demonstrates the APPEND and RENAME commands for modifying and renaming keys, as well as GETSET and GETRANGE for retrieving and setting specific parts of values. Each command is explained with examples to illustrate their functionality.

What is the purpose of the 'flushall' command in Redis?

• To retrieve multiple values at once

• To set a new value for a key

• To clear all variables in memory

• To append a value to an existing key

How does the 'mset' command differ from the 'set' command?

• It allows setting multiple values at once

• It retrieves values from multiple keys

• It sets values conditionally

• It appends values to existing keys

What happens if you use 'msetnx' with a key that already exists?

• The existing value is overwritten

• The command fails and no values are set

• The existing value is appended

• The command sets a new expiration time

What is the main difference between 'setex' and 'psetex' commands?

• Setex renames keys, psetex deletes them

• Setex is for single values, psetex for multiple

• Setex appends values, psetex retrieves them

• Setex sets expiration in seconds, psetex in milliseconds

What does the 'append' command do in Redis?

• It deletes a key from the database

• It adds a value to the end of an existing string

• It retrieves the length of a string

• It sets a new value for a key

How can you rename a key in Redis?

• Using the 'rename' command

• Using the 'append' command

• Using the 'set' command

• Using the 'mset' command

What does the 'getrange' command do?

• It retrieves a substring from a string value

• It appends a range of values to a key

• It retrieves the entire value of a key

• It sets a range of values for a key