3i Infotech Placement: Sample Questions 1195 - 1196 of 1245
Glide to success with Doorsteptutor material for competitive exams : get questions, notes, tests, video lectures and more- for all subjects of your exam.
Question 1195
Explanation
- A parent and child can communicate using normal inter-process communication schemes- in addition they have special ways to communication which take advantages of their parent child relationship.
- After forking the process, child process inherits all properties of parent, also pipe.
- The child inherits file descriptors from its parent, if parent opens two ends of a pipe then after fork, parent can chose one end and the child choses the other end of the pipe.
- This is done using popen () routine to run a child program.
- Parent can store the file descriptor returned from popen () -child and parent processes can use it as stdin, and stdout.
- In addition, child process inherits memory segments mapped anonymously by the parent- not accessible from unrelated processes.
Question 1196
Explanation
- The unique address for a device identified at the Media Access Control layer in the network architecture.
- Used by the Media Access Control sub-layer of the Data-Link Layer of telecommunication protocols.
- Different MAC exist for each physical device type
- Usually stored in ROM on the network adapter card.
- A hardware identification number that uniquely identifies each device on a network- manufactured into every network card, ethernet card, or Wi-Fi card.
- Reliable way to identify senders and receivers of data on the network.
- They are usually written in one of the below three formats:
- MM: MM: MM: SS: SS: SS
- MM: MM-MM-SS-SS-SS
- MMM. MMM. SSS. SSS