Every Book Back multiple-choice question from Domain Name System (DNS) (12th Standard Computer Applications, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Which of the following is used to maintain all the directories of domain names?
- A. Domain name systemCorrect
- B. Domain name space
- C. Name space
- D. IP address
Explanation. The Domain Name System (DNS) maintains directories mapping friendly domain names to machine-readable IP addresses.
Q2
Which of the following notation is used to denote IPv4 addresses?
- A. Binary
- B. Dotted-decimal
- C. Hexadecimal
- D. a and bCorrect
Explanation. IPv4 addresses are represented as either 32-bit binary notation or in dotted-decimal format separated by dots.
Q3
How many bits are used in the IPv6 addresses?
- A. 32
- B. 64
- C. 128Correct
- D. 16
Explanation. An IPv6 address uses 128 bits divided into eight 16-bit blocks represented as hexadecimal numbers.
Q4
Expansion of URL is
- A. Uniform Resource Location
- B. Universal Resource Location
- C. Uniform Resource LocatorCorrect
- D. Universal Resource Locator
Explanation. URL is an abbreviation for Uniform Resource Locator, representing the address of a document on the Internet.
Q5
How many types are available in URL?
- A. 2Correct
- B. 3
- C. 4
- D. 5
Explanation. URLs are categorized into two types based on the document location: absolute URL and relative URL.
Q6
Maximum characters used in the label of a node?
- A. 255
- B. 128
- C. 63Correct
- D. 32
Explanation. Each node in the hierarchical domain name space tree has a string label limited to 63 characters.
Q7
In the domain name, the sequence of labels is separated by
- A. semicolon (;)
- B. dot (.)Correct
- C. colon (:)
- D. NULL
Explanation. A domain name consists of a sequence of node labels separated by dots, read from bottom to top.
Q8
Which of the following initiates the mapping of domain name to IP address?
- A. Zone
- B. Domain
- C. ResolverCorrect
- D. Name servers
Explanation. The resolver is a client-side program running on the host that initiates the mapping of a domain name to an IP address.
Q9
Which is the contiguous area up to which the server has access?
- A. ZoneCorrect
- B. Domain
- C. Resolver
- D. Name servers
Explanation. A zone is a contiguous section of the domain name space managed by a specific authoritative name server.
Q10
Root Name servers are maintained by
- A. IANA
- B. ICANNCorrect
- C. WHOIS
- D. DNS
Explanation. Root name servers, which manage the highest level of the DNS tree, are maintained by ICANN.
About these Domain Name System (DNS) questions
These are the Book Back multiple-choice questions for Domain Name System (DNS) from the Tamil Nadu State Board (Samacheer Kalvi) 12th Standard Computer Applications syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Domain Name System (DNS)?
This chapter has 10 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 12th Standard Computer Applications MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Domain Name System (DNS) book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
