CS401A's Finals: Comp. Sys. Interact Module 08

Question 1

Advanced Architectures

The American Heritage Dictionary offers two (2) applicable definitions of \_\_\_\_\_\_\_

Answer 1

Virtualization
virtual

Question 2

Advanced Architectures

The American Heritage Dictionary offers \_\_\_ (_) applicable definitions of virtual that describe the usage of the word in modern computing:

Answer 2

Virtualization
two (2)
* It is an existence or a result in the essence or effect though not in actual fact, form, or name.
* It is created, simulated, or carried on by means of a computer or computer network.

Question 3

Advanced Architectures

The \_\_\_\_\_\_\_\_\_\_\_\_\_\_ of a computer allows a single computer to appear as a multiplicity of computers, each with its own operating system and hardware resources.

Answer 3

Virtualization
virtualization

Question 4

Advanced Architectures

An individual computer system is used to simulate

Answer 4

Virtualization
multiple computers, all sharing the same CPU and I/O facilities.

Question 5

Advanced Architectures

An individual computer system is used to simulate multiple computers, all sharing the same CPU and I/O facilities. The simulated machines are known as

Answer 5

Virtualization
virtual computers or virtual machines.

Question 6

Advanced Architectures

refers to a task in which the operating system uses some criteria to decide how long to allocate to any one task before giving another task a turn to use the operating system.

Answer 6

Parallel Computing
Preemptive multitasking

Question 7

Advanced Architectures

implies the ability of interrupting a task, switching to another one, and then resuming the first task at a later time.

Answer 7

Parallel Computing
The term “preemption”

Question 8

Advanced Architectures

on the other hand, refers to the ability to run simultaneous processes in a given time unit.

Answer 8

Parallel Computing
The term “multitasking”,

Question 9

Advanced Architectures

TRUE || FALSE
Processes that run in an operating system is the only way to perform several operations at the same time.

Answer 9

Parallel Computing
FALSE.

Question 10

Advanced Architectures

Processes that run in an operating system is not the only way to perform several operations at the same time. This activity could be done with the use of simultaneous subtasks called

Answer 10

Parallel Computing
threads.

Question 11

Advanced Architectures

From coining preemptive multitasking and parallel computing, there are terms that must be considered:

“the perception of having tasks that run at the same time.”

Answer 11

Parallel Computing
* Concurrency is defined as

Question 12

Advanced Architectures

From coining preemptive multitasking and parallel computing, there are terms that must be considered:

literally run at the same time.

Answer 12

Parallel Computing
* Parallelism are tasks that

Question 13

Advanced Architectures

From coining preemptive multitasking and parallel computing, there are terms that must be considered:

a subset of concurrency.

Answer 13

Parallel Computing
* Parallelism is a subset of

Question 14

Advanced Architectures

Parallel Computing
Things run smoothly as long as \_\_\_ (_) \_\_ \_\_\_\_ threads \_\_\_\_ from the same memory location.

Answer 14

Things run \_\_\_\_\_\_\_\_ as long as two (2) or more \_\_\_\_\_\_\_ read from the same \_\_\_\_\_\_ \_\_\_\_\_\_\_\_.

Question 15

Advanced Architectures

Parallel Computing
The troubles kick in when at least \_\_\_ \_\_ \_\_\_\_ \_\_\_\_\_\_ to the shared memory, while the others are \_\_\_\_\_\_\_ from it.

Answer 15

The \_\_\_\_\_\_\_\_ kick in when at least one of them
writes to the \_\_\_\_\_\_ \_\_\_\_\_\_, while the others are reading from it.

Question 16

Advanced Architectures

Parallel Computing
At this point, \_\_\_ (_) \_\_\_\_\_\_\_\_ can occur:

— While the writer thread \_\_\_\_\_\_\_\_ the memory, a reader thread might be \_\_\_\_\_\_\_ from it.

Answer 16

Parallel Computing
At this point, two (2) problems can occur:

• Data Race
  — While the \_\_\_\_\_\_ \_\_\_\_\_\_ modifies the memory, a \_\_\_\_\_\_ \_\_\_\_\_\_ might be reading from it.

Question 17

Advanced Architectures

Parallel Computing
At this point, \_\_\_ (_) \_\_\_\_\_\_\_\_ can occur:

If the writer has not \_\_\_\_\_\_\_\_ its work yet, the reader will \_\_\_\_\_\_\_ corrupted data.

Answer 17

Parallel Computing
At this point, two (2) problems can occur:

• Data Race
  If the \_\_\_\_\_\_\_ has not finished its work yet, the \_\_\_\_\_\_ will acquire corrupted \_\_\_\_.

Question 18

Advanced Architectures

Parallel Computing
At this point, \_\_\_ (_) \_\_\_\_\_\_\_\_ can occur:

— This occurs when \_\_\_ (_) \_\_\_\_ threads can \_\_\_\_\_\_ the same shared data and try to \_\_\_\_\_\_ the data at the same time.

Answer 18

Parallel Computing
At this point, two (2) problems can occur:

• Race Condition
  — This occurs when two (2) more \_\_\_\_\_\_\_ can access the same \_\_\_\_\_\_ \_\_\_\_ and try to change the \_\_\_\_ at the same time.

Question 19

Advanced Architectures

There are some possible solutions for the problems stated above:

Answer 19

• Synchronization
• Atomic Operations
• Immutable Data