Parallel and concurrent programming

What means these code?

• Parallel is more faster than not parallel

• Parallel require more time for comunication task

• Parallel is more slower than not parallel

• sys time is the all system time

The four classifications of Flynn's Taxonomy are based on the number of concurrent _____ streams and _____ streams available in the architecture.

• instruction; data

• operations; data

• program; data

• process; memory

Parallel computing can increase the _____.

• number of tasks that a program can complete within a specified period of time

• "speed at which a program executes a set number of tasks"

• scale of problems a program can tackle

• all of these answers

A key advantage of distributed memory architectures is that they are _____ than shared memory systems.

• more responsive

• more scalable

• easier to program for

• less complex

A thread that calls the join method on another thread will enter a _____ state until the other thread finishes executing.

• new

• runnable

• terminated

• blocked

Why would you use detached daemon threads to handle continuous background tasks?

• Daemon threads always execute at the lowest priority which makes them ideal for background tasks.

• Daemon threads will automatically spawn additional helper threads as needed when their workload increases.

• You should never trust a daemon. They're mischievous!

• The daemon thread will not prevent the program from terminating when the main thread is finished.

Why can it be risky to use a detached daemon thread to perform a task that involves writing data to a log file?

• Daemons only write their own name, so the log will just say "Daemon, Daemon, Daemon, etc."

• Daemon threads cannot read or write files.

• The log file could be corrupted.

• The log file could end up with multiple, duplicate entries.

It is possible for two tasks to execute _____ using a single-core processor.

• in parallel

• concurrently

• concurrently or in parallel

• similarly

A hyperthreaded processor with 8 logical cores will usually provide _____ performance compared to a regular processor with 8 physical cores.

• lower

• higher

• equivalent

• parallel

You can safely expect threads to execute in the same relative order that you create them.

• True

• False