Interview Questions on Socket Programming and Multi-Threading [closed]

Answer 1

• Name some advantages and disadvantages of Java Sockets.
• What is the difference between URL instance and URLConnection instance?
• How do I make a connection to URL?
• What Is a Socket in Java Networking and RMI?
• What information is needed to create a TCP Socket?
• What are the two important TCP Socket classes?
• When MalformedURLException and UnknownHostException throws?
• What does RMI stand for?
• What is RMI?
• What is the difference between the File and RandomAccessFile classes?
• What interface must an object implement before it can be written to a stream as an object?
• Explain Look for Local Ports
• What are the two important TCP Socket classes?

Answer 2

What is deadlock and how do you avoid it?

Some socket programming questions.

Answer 3

• Why does a typical socket program need multi threading
• How do you talk to bunch of different network connections at once,from same process/thread? Hint:Asynchronous Socket
• Explain how Internet datatransfer works? or Explain how a webserver works? answer it based on socket programming concepts , Hint TCP Http etc..

Answer 4

Socket questions

• What is a socket?
• What are the differences between accept and connect?
• What are the differences between close and shutdown?
• How would you connect to www.google.com asynchronously?

Multi-threading questions

• What is a thread and how is it different from a process?
• When might you choose to use threads on a single CPU system?
• How would you measure the context switch overhead between threads?
• How would you make a MT-safe hash table, while allowing for maximal concurrency?

Answer 5

As a hiring manager, my favorite networking question to ask was this:

Imagine a user sitting at an Ethernet-connected PC. He has a browser open. He types "www.google.com" in the address bar and hits enter.

Now tell me what the first packet to appear on the Ethernet is.

Possible answers (of varying correctness) include:

• I don't know.
• An HTTP request packet.
• A TCP syn packet.
• A DNS request packet.
• An ARP packet.
• It depends.

Each of the answers reveals something about the person's understanding of networking in general, and IP and TCP in particular. The subsequent discussion can reveal volumes about their understanding. (Assuming, of course, that the questioner has some expertise in this area).

Answer 6

Socket Programming

• Difference between UDP and TCP.
• Difference between asynchronous and synchronous sockets.
• What is a packet.
• How'd you determine if packet didn't arrive malformed.
• How'd you determine where one packet ends and where another one starts.
• What is a port.

Multi-Threading

• What synchronization primitives do you know, tell difference between them.
• What is a deadlock and what is a livelock.
• What is a race condition.
• What does the term 'lock-free' mean.
• What is the best way to terminate a thread.
• Why you shouldn't use TerminateThread-esque functions.