How do you connect to Redis and perform basic operations?

**Connection Methods:** **Redis CLI:** redis-cli -h localhost -p 6379 -a password 127.0.0.1:6379> PING PONG 127.0.0.1:6379> SELECT 1 # switch to database 1 **Python (redis-py):** import redis # Basic connection r = redis.Redis(host='localhost', port=6379, db=0, decode_responses=True) # Connection pool (recommended) pool = redis.ConnectionPool(host='localhost', port=6379, max_connections=20) r = redis.Redis(connection_pool=pool) # Operations r.set('key', 'value', ex=3600) # expires in 1 hour value = r.get('key') r.delete('key') **Node.js (ioredis):** const Redis = require('ioredis'); const redis = new Redis({ host: 'localhost', port: 6379, retryDelayOnFailover: 100 }); await redis.set('key', 'value'); const value = await redis.get('key'); **Best Practices:** • Use connection pooling • Handle connection errors • Set appropriate timeouts • Use pipelines for bulk operations