Wireless PSI / Technical operation preparation questions : week 1

 

IT / Computer / Networking Questions 

Q1. NETBIOS is a

Correct Answer: Protocol
Explanation:
NETBIOS (Network Basic Input Output System) provides services related to session establishment and name resolution. It works as a network protocol, not a command or device.

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Q2. What is the port number for NNTP?

Correct Answer: 119
Explanation:
NNTP (Network News Transfer Protocol) uses TCP port 119 to transfer Usenet news articles.

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Q3. A DNS client is called?

Correct Answer: DNS Resolver
Explanation:
A DNS resolver is the client-side component that queries DNS servers to translate domain names into IP addresses.

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Q4. In IaaS (Infrastructure as a Service), who typically owns the infrastructure equipment?

Correct Answer: Provider owns and hosts the infrastructure
Explanation:
In IaaS:

• Provider manages servers, storage, networking

• Customer manages OS, applications, data

Examples: AWS EC2, Azure VM.

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Q5. When a packet does not fulfill ACL criteria, the packet is

Correct Answer: Dropped
Explanation:
Access Control Lists (ACLs) either permit or deny traffic. If conditions don’t match permit rules, the packet is dropped (discarded).

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Q6. Transport protocol used for XML/CIM is

Correct Answer: HTTP
Explanation:
XML/CIM (Common Information Model) communications typically use HTTP as the transport protocol.

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Q7. How do storage administrators ensure secure access to storage devices?

Correct Answer: All of the above
Explanation:
Security includes:

• Zoning

• Physical locks

• Shutting devices when not in use
  Hence, all options are valid.

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Q8. Diskless blades can be booted in OS/application using

Correct Answer: SAN disk
Explanation:
Diskless blade servers boot using SAN (Storage Area Network) through PXE or iSCSI.

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Q9. Terminal Services Gateway adds to the TS Web Access functionality by allowing secure communication using

Correct Answer: HTTPS
Explanation:
TS Gateway uses HTTPS (TCP 443) to securely tunnel RDP traffic.

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Q10. If servers’ clock times differ, which issue is most likely?

Correct Answer: User authentication
Explanation:
Time synchronization is critical for:

• Kerberos authentication
  Clock skew causes login failures.

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Q11. Best way to install all available packages

Correct Answer: Red Hat / base / packages
Explanation:
Linux package installations are handled via repositories like base, which contain essential packages.

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Q12. Which directory contains the man pages?

Correct Answer: /usr
Explanation:
Man pages are usually stored under:

/usr/share/man

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Q13. Default port for SMTP

Correct Answer: 25
Explanation:
SMTP uses:

• Port 25 → mail transfer

• Port 587 → mail submission (modern)

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Q14. Protocol used by ping

Correct Answer: ICMP
Explanation:
Ping sends ICMP Echo Request and receives Echo Reply to test connectivity.

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Q15. What is done by VLANs?

Correct Answer: Break a network into smaller broadcast domains at Layer 2
Explanation:
VLANs:

• Reduce broadcast traffic

• Improve security

• Operate at OSI Layer 2

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Q16. How many DMA channels are there in an AT-class PC?

Correct Answer: 8
Explanation:
AT PCs support 8 DMA channels (0–7).

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Q17. Suitable processing where data is accessed one after another

Correct Answer: Sequential access device
Explanation:
Devices like magnetic tapes use sequential access.

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Q18. IPv6 does not use which type of address?

Correct Answer: Broadcast
Explanation:
IPv6 replaces broadcast with:

• Multicast

• Anycast

• Unicast

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Q19. If HLEN in IP packet is 0101, header length is

Correct Answer: 20 bytes
Explanation:
HLEN = 5 (in 32-bit words)
5 × 4 bytes = 20 bytes

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Q20. What type of interrupt is TRAP?

Correct Answer: Internal
Explanation:
TRAP is an internally generated interrupt, often used for debugging or exceptions.

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Q21. Cache memory works on the principle of

Correct Answer: Locality of reference
Explanation:
Programs tend to access the same memory locations repeatedly (temporal & spatial locality).

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Q22. Device used to measure pulse width, frequency, rise time

Correct Answer: Oscilloscope
Explanation:
Oscilloscopes visualize voltage vs time, ideal for signal analysis.

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Q23. Source code file containing common functions

Correct Answer: Header file
Explanation:
Header files (.h) contain shared declarations and functions.

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Q24. A set of rules managing data communication is called

Correct Answer: Protocol
Explanation:
Protocols define how data is transmitted, received, and interpreted.

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Q25. Full form of IETF

Correct Answer: Internet Engineering Task Force
Explanation:
IETF develops and maintains Internet standards (RFCs).