MCQs on HDFS Advanced Security | Hadoop HDFS

Unlock the secrets of HDFS Advanced Security with this collection of MCQs, covering Kerberos Authentication, LDAP Integration, Encryption in HDFS, and Auditing and Compliance. Learn how to safeguard your Hadoop ecosystem with the latest security practices and configurations.

Topic 1: Advanced Kerberos Authentication Configuration

1. What is the primary role of Kerberos authentication in HDFS security?
   a) To provide encryption for data at rest
   b) To authenticate users and services securely
   c) To enable multi-node communication
   d) To manage HDFS block replication
2. Which protocol does Kerberos use for authenticating HDFS clients?
   a) LDAP
   b) Kerberos ticket-granting protocol
   c) RPC
   d) SSL/TLS
3. In Kerberos, what is a principal?
   a) A data block
   b) A key for encryption
   c) An identity for authentication
   d) A user’s password
4. What command is used to create a Kerberos principal for HDFS?
   a) kadmin
   b) create-principal
   c) kinit
   d) hdfs-kerberos
5. How does Kerberos prevent unauthorized access in HDFS?
   a) By allowing anonymous access
   b) By using a shared password for all users
   c) By issuing time-limited tickets for service access
   d) By replicating access logs
6. What is the role of the Key Distribution Center (KDC) in Kerberos authentication?
   a) To manage service data storage
   b) To store encrypted files
   c) To issue and verify Kerberos tickets
   d) To monitor DataNode activity
7. Which component of HDFS needs to be Kerberos-enabled for secure authentication?
   a) DataNodes
   b) ResourceManager
   c) NameNode
   d) All of the above
8. What happens if a Kerberos ticket expires in HDFS?
   a) The client gets automatically logged out
   b) The client can access HDFS without restrictions
   c) A new ticket is issued automatically
   d) The client is denied access and must reauthenticate
9. What is the purpose of a Service Principal Name (SPN) in Kerberos?
   a) To identify the user
   b) To map the service to the Kerberos realm
   c) To manage HDFS block replication
   d) To store user passwords
10. How is Kerberos authentication integrated into HDFS when configuring it for high availability?
    a) By using shared storage
    b) By enabling cross-realm authentication
    c) By setting up Kerberos for the active and standby NameNodes
    d) By increasing the replication factor

Topic 2: Managing HDFS with LDAP Integration

11. What is the purpose of integrating LDAP with HDFS?
    a) To enhance performance
    b) To manage user authentication and authorization
    c) To reduce replication overhead
    d) To compress data during storage
12. Which service does HDFS use for LDAP authentication?
    a) OpenLDAP
    b) Microsoft Active Directory
    c) Both OpenLDAP and Active Directory
    d) Apache Kafka
13. How does HDFS authenticate users with LDAP integration?
    a) By checking against the local user database
    b) By querying the LDAP directory for user credentials
    c) By using Kerberos tickets
    d) By issuing one-time passwords
14. What configuration file in HDFS is modified to enable LDAP authentication?
    a) core-site.xml
    b) hdfs-site.xml
    c) ldap-site.xml
    d) krb5.conf
15. Which LDAP attribute is typically used to store user credentials in an LDAP server?
    a) uid
    b) userPassword
    c) cn
    d) login
16. How does LDAP help in managing user permissions in HDFS?
    a) By storing the file system hierarchy
    b) By creating and managing access control lists (ACLs)
    c) By performing regular backups
    d) By automatically configuring replication
17. What is one advantage of using LDAP for user management in HDFS?
    a) Faster data replication
    b) Centralized user management across multiple services
    c) Better fault tolerance
    d) Automatic block size adjustments
18. Can HDFS use LDAP for both authentication and authorization?
    a) Yes
    b) No, only for authentication
    c) No, only for authorization
    d) No, LDAP is not compatible with HDFS
19. What does HDFS do after successfully authenticating a user via LDAP?
    a) The user is granted unlimited access
    b) A Kerberos ticket is generated
    c) The user’s permissions are fetched from the LDAP server
    d) The user is assigned a unique HDFS password
20. What LDAP protocol is used for securely accessing user data?
    a) LDAPv2
    b) LDAPS (LDAP over SSL)
    c) SAML
    d) OpenID

Topic 3: Encryption in HDFS (Data-at-Rest and Data-in-Transit)

21. What does “data-at-rest” refer to in HDFS encryption?
    a) Data that is currently being processed
    b) Data that is stored on disk but not being accessed
    c) Data that is being transferred over the network
    d) Data that is deleted from the system
22. Which encryption method is used for encrypting data-at-rest in HDFS?
    a) Symmetric encryption
    b) Asymmetric encryption
    c) Block-level encryption
    d) End-to-end encryption
23. What is the default encryption algorithm used in HDFS for data-at-rest?
    a) AES-128
    b) AES-256
    c) RSA
    d) Triple DES
24. How does HDFS handle data-in-transit encryption?
    a) By using SSL/TLS for communication between clients and servers
    b) By compressing the data before sending it
    c) By encrypting the metadata
    d) By encrypting only large files
25. What component is responsible for managing encryption keys in HDFS?
    a) NameNode
    b) Key Management Server (KMS)
    c) ResourceManager
    d) DataNode
26. What must be configured to enable encryption in HDFS?
    a) HDFS replication
    b) Key management and encryption zones
    c) LDAP authentication
    d) Block report interval
27. Which tool in HDFS allows for managing encryption keys?
    a) hdfs encryption
    b) hdfs kms
    c) hdfs keymanager
    d) hdfs encrypt
28. Which of the following is true about HDFS encryption for data-at-rest?
    a) It uses a unique key for every file
    b) It encrypts both file data and metadata
    c) It only encrypts large files
    d) It does not require any additional configuration
29. What is a key advantage of encrypting data in transit in HDFS?
    a) Reduces storage space usage
    b) Protects data from eavesdropping and tampering
    c) Speeds up data transfer
    d) Minimizes replication
30. Which protocol is commonly used for data-in-transit encryption in HDFS?
    a) SSL/TLS
    b) Kerberos
    c) IPsec
    d) SSH

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