Common Threats and Blockchain Security Best Practices BBLC Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which network-level control is specifically designed to mitigate distributed denial-of-service (DDoS) attacks against blockchain infrastructure?

   • AUsing strong passwords for node access.
   • BDDoS protection services that filter malicious traffic.
   • CEncrypting all data at rest.
   • DRegularly updating node software.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   What is the primary purpose of a hardware wallet for private key storage?

   • ATo increase the speed of transaction signing.
   • BTo keep the private key offline and protected from malware and online attacks.
   • CTo allow multiple users to share the same private key.
   • DTo automatically back up the private key to the cloud.
   Reveal Solution Discussion Select an answer first
4. 3expert · hard

   A company's CEO has lost access to the corporate cryptocurrency wallet because the private key was stored on a laptop that was stolen. The wallet holds a significant amount of funds. There is no backup of the private key. What is the BEST course of action?

   • AAccept the loss and implement a new key management protocol with multi-signature and offline backups for future wallets.
   • BUse a hardware wallet that was previously connected to the laptop to sign transactions.
   • CContact the blockchain network's developers to reverse the transaction.
   • DTry to brute-force the laptop's password to recover the key.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   What is the primary goal of user education on security hygiene in blockchain?

   • ATo increase the number of transactions users perform.
   • BTo teach users how to mine new blocks.
   • CTo encourage users to share their private keys with trusted friends.
   • DTo reduce human-related risks such as phishing and social engineering.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A company's blockchain administrator stores the private keys for its cryptocurrency wallet on a shared network drive so that multiple employees can sign transactions. An auditor flags this as a security risk. Which change should the administrator implement first?

   • AEmail the private keys to each employee so they can store them locally.
   • BEncrypt the shared drive with BitLocker and keep the same access permissions.
   • CMove the private keys to a hardware security module (HSM) and enforce multi-party authorization for signing.
   • DChange the file extension to .key so that it is not easily recognized.
   Reveal Solution Discussion Select an answer first