Top & Advance Questions & Answers on Blockchain & Web3 (2025) 1. What is a Blockchain Layer-2 Solution in Web3? Queries: Layer-2 blockchain, scalability, Ethereum rollups, ZK-Rollups, Optimistic Rollups Answer: A Layer-2 blockchain solution is a scaling technology that processes transactions off-chain to improve transaction speed , throughput , and gas efficiency on networks like Ethereum. Popular Layer-2 frameworks include ZK-Rollups and Optimistic Rollups , which reduce network congestion while maintaining Layer-1 security .   2. How Do Zero-Knowledge Proofs (ZKPs) Improve Blockchain Security? Queries: zero-knowledge proofs, ZK-SNARKs, blockchain privacy, cryptographic security Answer: Zero-Knowledge Proofs (ZKPs) allow verification of data without exposing sensitive information . Technologies such as ZK-SNARKs and ZK-STARKs enhance blockchain security by enabling privacy-preserving transactions , scalable rollups , and secure identity verification i...

    Scenario-Based Splunk Admin Questions and Answers   1. Scenario: High Disk Usage on Indexer Node Q: Your Splunk indexer is consuming disk rapidly. How would you troubleshoot and resolve this? A: 1.       Check index sizes: Use: 2.            | dbinspect index=*  or du -sh /opt/splunk/var/lib/splunk/* 3.       Review index retention settings: Check indexes.conf for maxTotalDataSizeMB and frozenTimePeriodInSecs . 4.       Archive or delete old data: Use coldToFrozenDir to move data to external storage. Configure cold and frozen paths to reduce disk usage. 5.       Implement data lifecycle policies: Reduce retention or filter logs at ingestion time with props and transforms.   2. Scenario: Forwarders Not Sending Data Q: A group of Universal Forwarders suddenly stopped sending d...