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INFO5104 > Concurrency > Flashcards

Concurrency Flashcards

1
Q

A program is a _______ collection of instructions

A

passive

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2
Q

A program needs a distinct ______ point and _______ point

A
  1. entry
  2. exit
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3
Q

What is an instance of a computer program that is being executed?

A

Process

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4
Q

What is the minimum number of threads in a process?

A

1

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5
Q

What are the 4 states of a process?

A
  1. Running
  2. Ready
  3. Suspended
  4. Blocked
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6
Q

A process is in the _______ state when it is active on the computer.

A

Running

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7
Q

A process is in the _______ state when it could run, but isn’t currently.

A

Ready

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8
Q

A process is in the _______ state when it is not allowed to run and not allowed to wait.

A

Suspended

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9
Q

A process is in the _______ state when it is waiting.

A

Blocked

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10
Q

Can a process share virtual memory with another process?

A

No

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11
Q

A shell is a process that provides an interface to the _______ functions.

A

Operating System

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12
Q

What is known as a distinct path of execution within a process?

A

Thread

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13
Q

What’s good about Win32 threads?

A
  1. Low level
  2. Efficient
  3. Customizable
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14
Q

What’s bad about Win32 threads?

A
  1. C-style arrays
  2. Too many steps
  3. Windows only
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15
Q

What’s wrong with C++ 11 threads?

A

No access to security or stack

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16
Q

What’s a race condition?

A

Two signals racing each other to influence the output first

17
Q

What is a deadlock?

A

Two or more competing actions are waiting for the other to finish.

18
Q

What is the oldest type of computer multitasking?

A

Multiprogramming

19
Q

In multiprogramming, processes are switched when a process waits for a _______.

A

Peripheral

20
Q

In time sharing, processes are switched on a _______.

A

Timer

21
Q

Which type of multitasking launched the GUI age?

A

Cooperative Multitasking

22
Q

What is the most recent type of multitasking?

A

Symmetric Multiprocessing

23
Q

In symmetric multiprocessing all dynamic memory is _______

A

Shared

INFO5104 (3 decks)

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