In the Many to Many model true concurrency cannot be gained because ___________

• A. The kernel can schedule only one thread at a time
• B. There are too many threads to handle
• C. It is hard to map threads with each other
• D. None of the mentioned

In the Many to Many models when a thread performs a blocking system call ___________

• A. Other threads are strictly prohibited from running
• B. Other threads are allowed to run
• C. Other threads only from other processes are allowed to run
• D. None of the mentioned

Signals that occur at the same time, are presented to the process ____________

• A. One at a time, in a particular order
• B. One at a time, in no particular order
• C. All at a time
• D. None of the mentioned

Signals of a given type ____________

• A. Are queued
• B. Are all sent as one
• C. Cannot be queued
• D. None of the mentioned

The three ways in which a process responds to a signal are ____________

• A. Ignoring the signal
• B. Handling the signal
• C. Performing some default action
• D. All of the mentioned

Signals are identified by ____________

• A. Signal identifiers
• B. Signal handlers
• C. Signal actions
• D. None of the mentioned

When a process blocks the receipt of certain signals?

• A. The signals are delivered
• B. The signals are not delivered
• C. The signals are received until they are unblocked
• D. The signals are received by the process once they are delivered

The _______ maintains pending and blocked bit vectors in the context of each process.

• A. Cpu
• B. Memory
• C. Process
• D. Kernel

In UNIX, the set of masked signals can be set or cleared using the ________ function.

• A. Sigmask
• B. Sigmaskproc
• C. Sigprocmask
• D. Sigproc

The usefulness of signals as a general inter process communication mechanism is limited because ____________

• A. They do not work between processes
• B. They are user generated
• C. They cannot carry information directly
• D. None of the mentioned