230 Exam Questions with complete solution 2024/2025
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Course
WDD
Institution
WDD
230 Exam Questions with complete solution 2024/2025 230 Exam
sem_post() decrements the value of a semaphore. - correct answer FALSE. it increments
A server process can manage multiple TCP/IP connections through a single port - correct answer TRUE
Two processes can use a single pipe for...
230 Exam
sem_post() decrements the value of a semaphore. - correct answer
✔FALSE. it increments
A server process can manage multiple TCP/IP connections through a single
port - correct answer ✔TRUE
Two processes can use a single pipe for bi-directional communication. -
correct answer ✔FALSE: If you use the same pipe how does the child
separate its messages from the parents messages and vice versa?
Any bytes written to a pipe beyond its capacity are discarded - correct answer
✔FALSE: the data is blocked until the pipe is not full
In a client-server architecture, the server typically has a dynamic IP address. -
correct answer ✔FALSE: it has a static IP
When all file descriptors referring to a pipe have been closed, any outstanding
data is discarded. - correct answer ✔TRUE
A connection is uniquely identified by the socket addresses of its endpoints
(IP address and port number) and its protocol. - correct answer ✔TRUE
With TCP sockets, the well-known ports have lower port numbers than
ephemeral ports. - correct answer ✔TRUE: well-known ports are lower
, In a process with multiple running threads, if a thread created with
pthread_create(3) calls exit(2), the main thread will continue to execute. -
correct answer ✔FALSE: exit() terminates all threads
pthread_exit() only terminates one
Two threads in the same process share the same call stack - correct answer
✔FALSE: In a multi-threaded process, all of the process' threads share the
same memory and open files. Within the shared memory, each thread gets its
own stack
Name the two thread-based functions that best correspond to the two
process-based functions fork() and waitpid(). - correct answer
✔pthread_create and phread_join
Name two advantages of stream sockets services (TCP) over datagram
sockets services (UDP). - correct answer ✔TCP: connection-orienteded
reliable
slower
flow/congention control
UDP: connectionless
unreliable
faster
no flow/congestion contorl
Name two possible advantages of using processes compared to using
threads. - correct answer ✔Process pros:
clean sharing model
simple and straight forward
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