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What is IPC? What are the various schemes available? The term IPC (Inter-Process Communication) describes various ways by which different process running on some operating system communicate between each other. Various schemes available are as follows: Pipes: One-way communication scheme through which different process can communicate. The problem is that the two processes should have a common ancestor (parent-child relationship). However this problem was fixed with the introduction of named-pipes (FIFO). Message Queues : Message queues can be used between related and unrelated processes running on a machine. Shared Memory: This is the fastest of all IPC schemes. The memory to be shared is mapped into the address space of the processes (that are sharing). The speed achieved is attributed to the fact that there is no kernel involvement. But this scheme needs synchronization. Various forms of synchronisation are mutexes, condition-variables, read-write locks, record-locks, and semaphores.
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Linux Systems Administrator

Interviewed at GoDaddy

3.9★
Jul 23, 2013

What is IPC? What are the various schemes available? The term IPC (Inter-Process Communication) describes various ways by which different process running on some operating system communicate between each other. Various schemes available are as follows: Pipes: One-way communication scheme through which different process can communicate. The problem is that the two processes should have a common ancestor (parent-child relationship). However this problem was fixed with the introduction of named-pipes (FIFO). Message Queues : Message queues can be used between related and unrelated processes running on a machine. Shared Memory: This is the fastest of all IPC schemes. The memory to be shared is mapped into the address space of the processes (that are sharing). The speed achieved is attributed to the fact that there is no kernel involvement. But this scheme needs synchronization. Various forms of synchronisation are mutexes, condition-variables, read-write locks, record-locks, and semaphores.

Whats is Stack overflow attack??...then he gave me a scenario where there was a open source code at a server and you have your piece of code at that server. You as a client are allowed to invoke a method which takes in a array as a parameter which is not checked for overflow validation. I had to induce a buffer overflow attack and make the method to pass control to my piece of code in the server.
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Linux Kernel Engineer

Interviewed at Qualcomm

3.8★
Jun 5, 2009

Whats is Stack overflow attack??...then he gave me a scenario where there was a open source code at a server and you have your piece of code at that server. You as a client are allowed to invoke a method which takes in a array as a parameter which is not checked for overflow validation. I had to induce a buffer overflow attack and make the method to pass control to my piece of code in the server.

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