What does newCondition() do?

Creates a condition from a lock

What is an IP address?

A unique address required of all computers on a network

What is a race condition?

When multiple threads are accessing a variable & overwrite each other

When does pair programming in XP not work as well?

With more experienced programmers

What is a critical section?

A part of the code that can cause race conditions with multiple threads

Which of these is the lifecycle of Rational Unified Process (RUP)?

Inception>Elaboration>Construction>Transition

What do notify() and notifyAll() do?

Moves Waiting threads into the Ready state

What does the synchronized keyword do?

Enables threads to acquire and release monitors.

Why could Functionality Addition be expensive?

Poor development process, Staff skills, Team stability, Program age and structure

What are the properties of the ExecutorService created by this method: newCachedThreadPool()

Creates new threads and reuses previously constructed threads when possible

Which of these is true about the synchronized keyword?

Implicitly acquires lock, Explicitly acquires monitor

What does yield() do to a thread?

It goes from the Running state to the Ready state, Temporarily releases the thread from the CPU to another thread (or itself)

What is starvation/contention?

When a higher-priority thread never yields or sleeps.

What are the properties of the ExecutorService created by this method: newFixedThreadPool(int numThreads)

Reuses a maximum fixed number of threads

Let's look at the 4 fundamental activities of software engineering: Validation

Ensure the program is what is needed

A way to uniquely identify networked programs

Time for networking theory! What is a server?

A computer that can service requests from clients

Let's talk about conditions now. What does await() do?

Waits for a condition to be signaled

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CS201 Midterm 1 Study Guide Part 2

100 termsStudBud Administration20 plays

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Questions 100

Answers

1
Which of these is fail-fast(not synchronized) in the synchronized Collections objects?
Constructor
Destructor
Pointers
Iterator
2
What is the Parallel equivalent of run()
compute()
join()
invoke()
fork()
3
What are the properties of the ExecutorService created by this method: newSingleThreadExecutor()
Creates new threads and reuses previously constructed threads when possible
Reuses a maximum fixed number of threads
Uses a single worker thread
Can schedule commands to run after a given delay or periodically
4
What are ports 0-1023 (reserved) used for?
Idk
Well-known programs
Any application
Operating system
5
How many bits does an IPv4 address have?
32 bits (4 groups of 8 bits)
128 bits (4 groups of 8 hexadecimal values)
128 bits (8 groups of 4 hexadecimal values)
32 bits (8 groups of 4 bits)
6
What does newCondition() do?
Wake up all the threads waiting on the condition
Waits for a condition to be signaled
Creates a condition from a lock
Wake up one thread waiting on the condition
7
The first bit is 1110, the rest is for the Multicast address
Class D
Class B
Class C
Class A
8
How long is a sprint in Scrum?
2-4 months
1 week
2-4 weeks
Every day
9
Let's look at the 4 fundamental activities of software engineering: Specification
Modify the program based on new requirements
Define what is needed
Program what is needed
Ensure the program is what is needed
10
Congrats! You just made it through 30 questions about Week 4 concurrency! We're halfway through!
This is not worth it. I'm just going to study my own way
Thanks, I'm leaving
Poopity scoop
Heck yeah
11
What is an IP address?
A way to uniquely identify networked programs
A unique address required of all computers on a network
Used for a computer/router to automatically assign network configuration
Takes bits away from the host address to allow for more network addresses
12
Which of these is a type of User testing?
Alpha - Users work with developers to test at the developer's site
Beta - A release is made available to users to experiment with
All of these
Acceptance - Users test to decide if it is ready to be accepted & deployed
13
Test the entire application without looking at the code
Regression testing
White box testing
Black box testing
Unit testing
14
What is a race condition?
Racism
Something in a critical section
When multiple threads are accessing a variable & overwrite each other
When multiple threads have access to a shared resource
15
T/F: Any Object can be a monitor
True
False
16
Which of these is NOT a fundamental characteristic of rapid software development?
Documentation is minimized
Releases are typically every 2-3 weeks
Testing is minimized
Customers are involved in the development process
17
The first bit is 0, about 1 byte for the network, the rest for the Host (remember: 1 byte = 8 bits)
Class C
Class B
Class D
Class A
18
When does pair programming in XP not work as well?
With more programmers
With more experienced programmers
With fewer programmers
With less experienced programmers
19
What is routing?
Sends data between computers
Not this one
Allows for private IP addresses
Automatically assigns IP addresses
20
What is a critical section?
A part of the code that can cause race conditions with multiple threads
A piece of code that requires a lock
A c-section
A section that is critical
21
Which of these is the lifecycle of Rational Unified Process (RUP)?
Specification>Analysis>Modification>Reuse>Development>Validation
Specification>Development>Validation>Evolution
Requirements>Design>Implementation>Verification>Maintenance
Inception>Elaboration>Construction>Transition
22
What are ports 1024-49151 (registered) used for?
Well-known programs
Operating system
Idk
Any application
23
Do monitors use regular Lock or ReentrantLock?
ReentrantLock
Lock
24
What do notify() and notifyAll() do?
Moves Ready threads into the Running state
Moves Sleeping threads into the Ready state
Moves Waiting threads into the Ready state
Moves Running threads into the Ready state
25
What does the synchronized keyword do?
Enables threads to acquire and release semaphores
idk
Enables threads to acquire and release monitors.
idk
26
What is the difference between RecursiveTask & RecursiveAction?
RecursiveTask returns something
RecursiveAction is executed with execute()
RecursiveTask is executed with invoke()
All of these
27
Why could Functionality Addition be expensive?
Poor development process
Staff skills
Team stability
Program age and structure
28
What are the properties of the ExecutorService created by this method: newCachedThreadPool()
Reuses a maximum fixed number of threads
Uses a single worker thread
Creates new threads and reuses previously constructed threads when possible
Can schedule commands to run after a given delay or periodically
29
Which of these is true about the synchronized keyword?
Implicitly acquires lock
Explicitly acquires monitor
Implicitly acquires monitor
Explicitly acquires monitor
30
What does yield() do to a thread?
It goes from the Running state to the Ready state
Temporarily releases the thread from the CPU to another thread (or itself)
It goes from the Running state to the Waiting state
It lets go of the lock/monitor
31
What is starvation/contention?
idk
When a higher-priority thread never yields or sleeps.
idk
When a higher-priority thread never executes
32
For synchronized static methods, is the lock obtained on the object or the class?
Class
Object
33
What is a benefit of using ThreadPools (like Executor)?
If a thread fails and terminates, another thread is made to replace it
Allows for threads to be reused after completion
It can be more efficient
All of these
34
Which of these is NOT a real testing strategy?
Stress testing
Blue box testing
Unit testing
Regression testing
35
What is the Parallel equivalent of Thread/Runnable?
ForkJoinPool
RecursiveAction
RecursiveTask
ForkJoinTask
36
T/F: You can set a thread's priority
False
True
37
Which of these is a type of software component that may be used in Reuse-Oriented?
Stand-alone software systems configured for use in a particularenvironment
Collections of objects developed as a package, such as J2EE or.NET
Web services that are available for remote invocation
All of these
38
What are the properties of the ExecutorService created by this method: newFixedThreadPool(int numThreads)
Can schedule commands to run after a given delay or periodically
Creates new threads and reuses previously constructed threads when possible
Uses a single worker thread
Reuses a maximum fixed number of threads
39
Which of these is true about the producer/consumer problem?
All of these
The producer has to wait for there to be enough room to refill a resource
The consumer has to wait for there to be enough of a resource to deplete
Might result in a deadlock without conditions
40
T/F: The number of permits available on a semaphore is specified at creation.
False
True
41
Which of these is a type of Release testing?
Scenario - devises typical scenarios for the program
All of these
Performance/stress/load - ensures the system can process its intended load
Requirements-based - at least one test per requirement
42
The first bit is 10, about 2 bytes for the network, the rest for the Host
Class A
Class C
Class D
Class B
43
Let's look at the 4 fundamental activities of software engineering: Validation
Define what is needed
Modify the program based on new requirements
Ensure the program is what is needed
Program what is needed
44
What is the ForkJoinPool class for?
Concurrent programming
Parallel programming
Distributed programming
Multi-threaded programming
45
What is a port?
Takes bits away from the host address to allow for more network addresses
Used for a computer/router to automatically assign network configuration
A unique address required of all computers on a network
A way to uniquely identify networked programs
46
Time for networking theory! What is a server?
The internet
A computer that requests a service to be performed by another computer
A router
A computer that can service requests from clients
47
Looks at the code to identify additional test cases
White box testing
Black box testing
48
Let's talk about conditions now. What does await() do?
Wake up one thread waiting on the condition
Waits for a condition to be signaled
Creates a condition from a lock
Wake up all the threads waiting on the condition
49
For www.usc.edu, which term comes from the Domain Name System (DNS) namespace?
.edu
www
usc
usc.edu
50
An engineering discipline that is concerned with the practical aspects of developing and delivering software
Software engineering
Computer science
51
How many bits does a port have?
128
32
16
255
52
What does wait() do?
Acquires the lock
Waits for the lock to be acquired
Waits for another thread to complete
Releases the lock
53
How do ExecutorService.shutdown() and ExecutorService.shutdownNow() differ?
shutdownNow waits for all currently executing threads to finish
shutdownNow prevents new threads from being created
shutdownNow kills all currently executing threads immediately
idk
54
Which is a rule of multi-threaded programming?
Use one lock for one resource
All of these
Always acquire locks in the same order in different threads
Always release locks in the opposite order they were acquired
55
What does explicitly setting a thread's priority to 10 (the highest priority) do?
The JVM will always execute the thread last
The JVM will always execute the thread first
Nothing. The JVM doesn't pay attention to your explicit priorities at all.
Increases the probability that the thread will be chosen first
56
Are we building the right product?
Validation
Verification
57
Which of these is the lifecycle of Reuse-Oriented?
Specification>Analysis>Modification>Reuse>Development>Validation
Specification>Development>Validation>Evolution
Requirements>Design>Implementation>Verification>Maintenance
Inception>Elaboration>Construction>Transition
58
The first bit is 110, about 3 bytes for the network, the rest for the Host
Class A
Class C
Class B
Class D
59
eXtreme Programming (XP), Scrum, Scrum-but
Plan-based
Agile-based
60
Which of these is the lifecycle of Waterfall?
Inception>Elaboration>Construction>Transition
Specification>Analysis>Modification>Reuse>Development>Validation
Specification>Development>Validation>Evolution
Requirements>Design>Implementation>Verification>Maintenance
61
Suppose tc is a running thread. You call tc.join() in main. What happens?
Forces the main thread to execute concurrently with tc
Forces the main thread to wait for tc to complete
Forces tc to restart
Trick question! Threads don't have a join() method
62
When changes are made, make sure the changes don’t affect other parts of the program
Unit testing
White box testing
Regression testing
Black box testing
63
What is the general pseudocode framework for RecursiveTask & RecursiveAction (hint: divide and conquer)
If condition, do work directly. Else, split the work
Not this one
Not this one
Not this one
64
What method do you use to find out if all threads have finished?
ExecutorService.shutdownNow()
ExecutorService.isTerminated()
ExecutorService.join()
ExecutorService.shutdown()
65
What is the Parallel equivalent of execute()?
execute()
fork()
join()
invoke()
66
Which of these is NOT a blocking queue in Java?
LinkedBlockingQueue
ArrayBlockingQueue
VectorBlockingQueue
PriorityBlockingQueue
67
What does software engineering deal with?
idk
Writing code for a program
The process of creating software
Theory and fundamentals
68
T/F: The JVM listens to the priority that you set a thread to
False
True
69
Which of these is a type of software maintenance?
Functionality addition - Adding functionality due to change in requirements
Environmental adaptation - Adapts to hardware, OS, & software changes
All of these
Fault repairs - Fixes coding, design, and requirements errors
70
What is thread synchronization?
When multiple threads are executing at the same time w/ time slicing
Controlling when multiple threads are executing
When multiple threads are executing at the same time w/o time slicing
Controlling when multiple threads have access to a shared resource
71
What is the Parallel equivalent of join()?
invoke()
execute()
fork()
join()
72
What does signal() do?
Waits for a condition to be signaled
Wake up one thread waiting on the condition
Creates a condition from a lock
Wake up all the threads waiting on the condition
73
Which of these is NOT thread-safe?
Stack
Vector
ArrayList
Hashtable
74
Which of these is NOT a stage of testing?
Alpha testing (by users during development)
User testing (by users)
Release testing (by test team)
Development testing (by developers)
75
Waterfall, Incremental, Reuse-oriented, Spiral
Plan-based
Agile-based
76
What is one property of plan-based methodologies?
More adaptable to changing requirements
Produces a large amount of documentation for sustainable projects
Sacrifices documentation for earlier release dates
It is better
77
Let's look at the 4 fundamental activities of software engineering: Development
Ensure the program is what is needed
Program what is needed
Define what is needed
Modify the program based on new requirements
78
Are we building the product right?
Validation
Verification
79
Why might Parallel be slower than Multi-threaded?
idk man, coming up with wrong answers is hard
There is overhead in moving a task between cores
Uh idk
If you fork more threads than there are cores, you'll have time slicing
80
What is the Parallel equivalent of start()?
execute()
invoke()
join()
fork()
81
Which is a rule of multi-threaded programming?
Always synchronize iterating through a data structure
Use the Collections framework for creating thread-safe data structures
All of these
Make a critical section as small as possible
82
What are ports 49152-65535 (dynamic/private) used for?
Any application
Operating system
Idk
Well-known programs
83
What is the hostname of www.usc.edu?
usc.edu
www
.edu
usc
84
What does a blocking queue do?
Forces a thread to Wait if it adds to a full queue or removes from an empty
not me
pick the other one
i'm sleep deprived while writing this
85
Congrats! That was Week 5! (the more i look at these slides, the more ashamed i am of my Assignment 2 code)
pipis
ya ya yee
piplup is the best pokemon
wowowow
86
The first bit is 1111, the rest is reserved for future use
Class E
Class B
Class C
Class D
87
Which of these is NOT a granularity of development testing?
Unit testing - testing individual functionality
Project testing - testing multiple systems
Component testing - testing multiple units
System testing - testing multiple components
88
What are the properties of the ExecutorService created by this method: newScheduledThreadPool(int corePoolSize)
Reuses a maximum fixed number of threads
Can schedule commands to run after a given delay or periodically
Uses a single worker thread
Creates new threads and reuses previously constructed threads when possible
89
In Waterfall, when do you create the Testing document?
After Implementation
After the Detailed Design document
After Technical Specifications
At the very end
90
T/F: A thread can release permits without acquiring them first
False
True
91
When is a class considered thread-safe?
If it doesn't cause race conditions when multiple threads access it
It is safe from threads
It is a thread with no objects that can cause race conditions
It can be accessed by threads safely
92
Uses the specifications of a system to identify the test cases
Black box testing
White box testing
93
What is one property of agile-based methodologies?
It is better
More adaptable to changing requirements
Sacrifices documentation for earlier release dates
Produces a large amount of documentation for sustainable projects
94
Ah sh**, I just realized I should've used a newScheduledThreadPool(int corePoolSize) for Assignment 2. Week 3 finished!
Bruh
Don't tell me you used a newCachedThreadPool() like an idiot
Dude, i just wanna study
Dude
95
What is a DHCP (dynamic host control protocol)?
A way to uniquely identify networked programs
Takes bits away from the host address to allow for more network addresses
A unique address required of all computers on a network
Used for a computer/router to automatically assign network configuration
96
How many bits does an IPv6 address have?
32 bits (8 groups of 4 bits)
32 bits (4 groups of 8 bits)
128 bits (4 groups of 8 hexadecimal values)
128 bits (8 groups of 4 hexadecimal values)
97
Theory and fundamentals
Computer science
Software engineering
98
What is the domain name of www.usc.edu?
.edu
usc
usc.edu
www
99
Which of these is an interface between components that can be tested by Component Testing
Message passing - when components requests services by passing a message
Procedural- when one component encapsulates procedures
Shared memory - when components share a block of memory
Parameter - when data is passed between components
100
What is a subnet?
Takes bits away from the host address to allow for more network addresses
A unique address required of all computers on a network
Used for a computer/router to automatically assign network configuration
A way to uniquely identify networked programs

CS201 Midterm 1 Study Guide Part 2 Flashcards | StudBud