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What is the main function of DNS in cloud computing?
a. Converting IP addresses to MAC addresses
b. Translating domain names to IP addresses
c. Encrypting data at rest
d. Generating virtual machines
Answer: b. Translating domain names to IP addressesgeeksforgeeks+1
In DNS, what is a domain name resolver also known as?
a. DNS server
b. DNS handler
c. DNS client
d. DNS authority
Answer: c. DNS clientsanfoundry+1
Which protocol does DNS commonly use for typical queries?
a. TCP
b. HTTP
c. UDP
d. FTP
Answer: c. UDPtestbook+1
What is the maximum length allowed for a fully-qualified domain name (FQDN)?
a. 127 characters
b. 255 characters
c. 63 characters
d. 512 characters
Answer: b. 255 characterssanfoundry+1
What type of DNS server holds original sources of zone data?
a. Recursive resolver
b. Forwarder
c. Authoritative name server
d. Root server
Answer: c. Authoritative name serveroracle+1
Which of the following does DNS NOT resolve?
a. Domain names to IP addresses
b. IP addresses to MAC addresses
c. Domain names to mail servers
d. Domain names to canonical names
Answer: b. IP addresses to MAC addressestestbook
In cloud computing, why is DNS failover important?
a. For backup power redundancy
b. To ensure continued service availability in case of failures
c. To encrypt network traffic
d. For patch management
Answer: b. To ensure continued service availability in case of failuresdnsmadeeasy
Which resource record type is used in DNS to map a domain name to an IPv4 address?
a. MX
b. CNAME
c. A
d. AAAA
Answer: c. Ageeksforgeeks+1
What does the DNS AAAA record represent?
a. Alias for a domain
b. IPv4 address mapping
c. Mail exchange
d. IPv6 address mapping
Answer: d. IPv6 address mappingoracle+1
Which best practice improves DNS security in cloud environments?
a. Disable DNS logging
b. Turn off DNSSEC
c. Use DNSSEC for zone signing
d. Share one DNS server for all zones
Answer: c. Use DNSSEC for zone signingheimdalsecurity+2
What would happen if DNS did not exist in cloud computing?
a. All VMs connect automatically
b. Users must remember server IP addresses for services
c. Internet would run faster
d. Email would be encrypted
Answer: b. Users must remember server IP addresses for servicesaws.amazon+1
Which layer in the OSI model does DNS operate at?
a. Application layer
b. Presentation layer
c. Network layer
d. Data link layer
Answer: a. Application layergeeksforgeeks+1
Which DNS server type initiates recursive queries on behalf of the client?
a. Root server
b. Caching resolver
c. Authoritative server
d. TLD server
Answer: b. Caching resolvergeeksforgeeks
What is the primary benefit of DNS caching?
a. Increased security
b. Improved query performance
c. DDoS protection
d. Encryption of traffic
Answer: b. Improved query performancecloudflare+1
What is the function of a CNAME record in DNS?
a. Maps domain name to an IP address
b. Stores mail exchange information
c. Provides canonical name alias for a domain name
d. Forwards DNS queries
Answer: c. Provides canonical name alias for a domain nameoracle+1
Which DNS record is used to specify mail servers for a domain?
a. MX
b. TXT
c. SRV
d. PTR
Answer: a. MXgeeksforgeeks
Which DNS record is used for reverse DNS lookup?
a. AAAA
b. CNAME
c. PTR
d. NS
Answer: c. PTRoracle+1
What is a DNS root server?
a. Handles only .com TLD queries
b. Top-level server that directs queries to TLD servers
c. Converts IPv4 to IPv6
d. Stores email routing tables
Answer: b. Top-level server that directs queries to TLD serversoracle+1
In a hybrid cloud environment, what is the advantage of DNS forwarding?
a. Enables communication between on-prem and cloud VMs
b. Encrypts all DNS queries
c. Reduces cost of storage
d. Provides web application firewall
Answer: a. Enables communication between on-prem and cloud VMscloud.google
What is the role of a DNS SRV record?
a. Maps domain name to an email address
b. Specifies location of servers for specific services
c. Aliases one domain to another
d. Stores public keys
Answer: b. Specifies location of servers for specific servicesgeeksforgeeks+1
In multi-cloud environments, which strategy improves DNS-based resilience?
a. Single provider lock-in
b. Authoritative DNS failover
c. Disabling Anycast
d. Static IP assignment
Answer: b. Authoritative DNS failoverdnsmadeeasy
What is DNS zone?
a. A network segment for IPs
b. A distinct administrative space within DNS hierarchy
c. A geographic region for caching
d. A physical data center
Answer: b. A distinct administrative space within DNS hierarchyoracle+1
Which protocol does DNS use for zone transfers between servers?
a. UDP
b. TCP
c. ICMP
d. HTTP
Answer: b. TCPtestbook+1
Why is DNS monitoring critical in public cloud platforms?
a. To log user passwords
b. To ensure DNS availability and detect attacks
c. To allocate cloud storage
d. For virtual machine automation
Answer: b. To ensure DNS availability and detect attacksverisign+2
DNS round robin is used in cloud environments to:
a. Encrypt data in transit
b. Distribute workload among multiple servers
c. Secure login to VMs
d. Manage user groups
Answer: b. Distribute workload among multiple serverscloud.google+1
DNS records for cloud are typically updated via:
a. Hardware consoles
b. API-driven automation
c. USB drives
d. Manual patching only
Answer: b. API-driven automationcloud.google+1
Which DNS record type stores arbitrary information, including SPF data?
a. TXT
b. MX
c. SOA
d. NS
Answer: a. TXTgeeksforgeeks+1
Cloud DNS providers recommend which key security best practice?
a. Disable redundancy
b. Secure access to DNS administration
c. Publish internal DNS records externally
d. Allow full recursion for all
Answer: b. Secure access to DNS administrationinfoblox+1
What is the effect of DNS record TTL (Time To Live) in a cloud context?
a. Increases bandwidth usage
b. Controls how long records are cached, affecting propagation speed
c. Leads to slower access
d. Encrypts DNS queries
Answer: b. Controls how long records are cached, affecting propagation speedheimdalsecurity+1
What is an advantage of Anycast DNS in the cloud?
a. Every request uses the same physical server
b. Requests are routed to the nearest available server
c. Requires static addressing
d. Works only with IPv4
Answer: b. Requests are routed to the nearest available serverdnsmadeeasy
How does DNS contribute to rapid elasticity in cloud computing?
a. Assigns MAC addresses to VMs
b. Provides DNS-based load balancing and virtual resource addressing
c. Sets up firewall rules
d. Allocates storage resources
Answer: b. Provides DNS-based load balancing and virtual resource addressingverisign
What is the primary purpose of SOA (Start of Authority) record in DNS?
a. Stores DNS administrator’s email
b. Defines DNS zone properties and primary server
c. Specifies mail servers
d. Contains only IPv6 mapping
Answer: b. Defines DNS zone properties and primary serveroracle+1
In cloud platforms, why is internal DNS used?
a. Only for logging
b. To allow VMs and services to resolve each other by name
c. For patch distribution
d. To store encryption keys
Answer: b. To allow VMs and services to resolve each other by namecloud.google+1
Which is NOT a common DNS attack vector?
a. DNS spoofing
b. DNS amplification
c. DNS tunneling
d. Cloud storage tiering
Answer: d. Cloud storage tieringinfoblox+1
In public clouds, using separate DNS zones per project improves:
a. Data encryption
b. Resource isolation and management
c. IaaS cost reduction
d. VM lifecycle automation
Answer: b. Resource isolation and managementcloud.google
Which DNS record is essential for SSL/TLS certificate validation in the cloud?
a. NS
b. MX
c. TXT
d. PTR
Answer: c. TXTcloud.google+1
For cloud providers, why is external DNS redundancy recommended?
a. Prevents domain registration
b. Minimizes downtime from DNS failures
c. Slows resolution speed
d. It is not needed
Answer: b. Minimizes downtime from DNS failuresheimdalsecurity+1
What is Google Cloud DNS?
a. A proprietary VM platform
b. A scalable, managed authoritative DNS service
c. A database engine
d. An email forwarding system
Answer: b. A scalable, managed authoritative DNS servicecloud.google
Which of these is NOT a DNS resource record type?
a. A
b. MX
c. VM
d. CNAME
Answer: c. VMgeeksforgeeks+1
Which role does DNS play in hybrid DNS architectures?
a. Disables cross-cloud traffic
b. Enables seamless DNS resolution across clouds and on-premises infrastructure
c. Encrypts public traffic
d. Manages cloud billing
Answer: b. Enables seamless DNS resolution across clouds and on-premises infrastructurecloud.google
Why is DNS central to multi-cloud management?
a. For logging cache misses
b. To ensure global service discoverability and failover
c. For VM deployment scripts
d. To secure hypervisor access
Answer: b. To ensure global service discoverability and failoverdnsmadeeasy+1
What does a DNS forwarder do?
a. Encrypts network packets
b. Forwards DNS queries to external servers for resolution
c. Disables DNS responses
d. Generates DNS records
Answer: b. Forwards DNS queries to external servers for resolutioncloud.google+1
Which DNS record stores the DNS zone’s primary authoritative name server?
a. NS
b. SOA
c. A
d. CNAME
Answer: b. SOAoracle+1
Where are global DNS root zone records maintained?
a. At Top-Level Domain servers only
b. At data center switches
c. In distributed root servers
d. In cloud storage buckets
Answer: c. In distributed root serversgeeksforgeeks+1
When a DNS resolver can’t find a record, what does it perform?
a. Forward lookup
b. Recursive query to higher-level DNS servers
c. Generates a new IP address
d. Sends ARP broadcast
Answer: b. Recursive query to higher-level DNS serversgeeksforgeeks
What is a best practice for DNS configuration in cloud platforms?
a. Use hardcoded IP addresses instead of DNS
b. Implement least-privileged DNS admin access
c. Rely on cached records indefinitely
d. Disable monitoring on DNS
Answer: b. Implement least-privileged DNS admin accessinfoblox+1
DNSSEC protects against which type of attack?
a. SQL injection
b. DNS spoofing
c. Rootkit
d. Memory leak
Answer: b. DNS spoofingheimdalsecurity+2
Which DNS mechanism is used for dynamic scaling in cloud-native applications?
a. DNS load balancing
b. Static DNS only
c. DNS tunneling
d. DNS caching-only
Answer: a. DNS load balancingverisign+1
What is the effect of setting a low TTL on DNS records in a cloud environment?
a. Increases cache hits, speeds up propagation of DNS changes
b. Decreases failover capability
c. Lowers DNS query volume
d. Slows DNS record updates
Answer: a. Increases cache hits, speeds up propagation of DNS changesheimdalsecurity+1
Which public cloud service offers managed DNS to global scale?
a. Amazon S3
b. Google Cloud DNS
c. Azure Blob Storage
d. Dropbox
Answer: b. Google Cloud DNScloud.google

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