Unix/Linux Interview Questions
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Networking and Unix Interview Questions
What is UTP?
UTP — Unshielded twisted pair 10BASE-T is the preferred Ethernet medium of the 90s. It is based on a star topology and provides a number of advantages over coaxial media:
It uses inexpensive, readily available copper phone wire. UTP wire is much easier to install and debug than coax. UTP uses RG-45 connectors, which are cheap and reliable.
What is a router? What is a gateway?
Routers are machines that direct a packet through the maze of networks that stand between its source and destination. Normally a router is used for internal networks while a gateway acts a door for the packet to reach the ‘outside’ of the internal network
Solaris Interview Questions III
- Display the page size of memory ? - pagesize -a
- Display Ethernet Address arp table ? - arp -a
- Display the no.of active established connections to localhost ? - netstat -a | grep EST
- Display the state of interfaces used for TCP/IP traffice ? - netstat -i
- Display the parent/child tree of a process ? - ptree <pid> Example: ptree 1267
- Show the working directory of a process ? - pwdx <pid> Example: pwdx 1267
- Display the processes current open files ? - pfiles <pid> Example: pfiles 1267
- Display the inter-process communication facility status ? - ipcs
Unix/Linux administration interview questions
What is LILO?
LILO stands for Linux boot loader. It will load the MBR, master boot record, into the memory, and tell the system which partition and hard drive to boot from.
What is the main advantage of creating links to a file instead of copies of the file?
Unix/Linux programming interview questions
Question 1: What is the major advantage of a hash table? (Asked by Silicon Magic Corp. people)
Answer: The major advantage of a hash table is its speed. Because the hash function is to take a range of key values and transform them into index values in such a way that the key values are distributed randomly across all the indices of a hash table.
Question 2: What are the techniques that you use to handle the collisions in hash tables?(Asked by Silicon Magic Corp. people)
Unix sysadmin interview questions
Q: How would you make the following SQL statement run faster? SELECT * FROM TABLEA WHERE COL1=’A’ AND COL2=’B’;
A: Make sure that COL1 and COL2 have indexes.
Find out which condition will return less values and use that as the first conditonal.
Q: What is Data Mining
A: Data Minig is the process of sifting through extremeley large amounts of Data to find trends or relevent information.
Q: Name the Seven layers in the OSI Model.
A: Appication, Presentation, Session, Transport, Network, Data Link, Phyiscal
