Top 50 DNS Objective type Questions and Answers

1) What is the name of the file, where we define our parent domain, or domain above us (in Linux Ubuntu)?
  A. /etc/bind/named
  B. /etc/bind/named.conf
  C. /etc/bind/named.conf.local
  D. /etc/bind/named.conf.options (Your Answer)
Ans: D

2) What is the setting to tell the secondary DNS, that there was a change in primary DNS that has to be updated?
  A. serial (Correct Answer)
  B. refresh
  C. retry
  D. expiry (Your Answer)
Ans: A

3) What is the name of the file, where we define our domain (in Linux Ubuntu)?
A. /etc/bind/named
  B. /etc/bind/named.conf
  C. /etc/bind/named.conf.local (Correct Answer)
  D. /etc/bind/named.conf.options (Your Answer)
Ans: C

4) What is the setting to tell the secondary DNS, WHEN to contact and update configuration files in primary DNS?
  A. serial
  B. refresh (Correct Answer)
  C. retry
  D. expiry (Your Answer)
Ans: B

5) How many domains in http://www.google.com?
  A. 1
  B. 2
  C. 3 (Correct Answer)
  D. 4 (Your Answer)
Ans: C

6) What is the name of DNS client configuration file?
A. /etc/resolv
  B. /etc/hostname
  C. /etc/resolv.conf (Correct Answer)
  D. /etc/hostname.conf (Your Answer)
Ans: C

7) What is the name of configuration file that could resolve host names to IP Address locally?
A. /etc/host
  B. /etc/hosts (Correct Answer)
  C. /etc/host.conf
  D. /etc/hostname (Your Answer)
Ans: B

8) What is the host name part of http://www.google.com?
  A. http
  B. www (Correct Answer)
  C. google
  D. com (Your Answer)
Ans: B

9) What is the keyword used to define a domain alias?
A. CNAME (Correct Answer)
  B. NS
  C. MX
  D. PTR (Your Answer)
Ans: A

10) What is the keyword used to define a Mail Server?
  A. CNAME
  B. NS
  C. MX (Your Answer)
  D. PTR
Ans: C


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