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Revature QC > Java > Flashcards

Java Flashcards

1
Q

Describe caching in a cpu.

A

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2
Q

Describe deadlock.

A

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3
Q

Describe visibility of a variable.

A

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4
Q

Describe volatility and the volatile keyword.

A

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5
Q

Does a thread get its own heap?

A

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6
Q

Does a thread get its own stack?

A

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7
Q

Give examples of some concurrency safe collections.

A

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8
Q

Give some examples of collections that are not concurrency safe.

A

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9
Q

How can enums help with making singletons thread safe?

A

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10
Q

How can we alter the singleton design pattern to be thread safe?

A

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11
Q

How do we fix race conditions?

A

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12
Q

In java multithreading, what is the monitor design pattern?

A

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13
Q

Is the classic singleton design pattern thread safe?

A

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14
Q

What are Consumer interfaces?

A

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15
Q

What are locks and keys?

A

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16
Q

What are Predicate interfaces, and what do they return?

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17
Q

What are the states of a thread?

A

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18
Q

What design pattern can we use to reuse threads and minimize the overhead in an application?

A

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19
Q

What does the .interrupt method do to a thread?

A

Moves a thread from the running state to the runnable state

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20
Q

What does the .join method do to a thread?

A

Calling thread enters the waiting state until the referenced thread terminates

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21
Q

What does the .notifyAll method do?

A

All threads are moved from the waiting state to the runnable state

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22
Q

What does the .notify method do to a thread?

A

One thread is moved from the waiting state to runnable state (chosen by the schedular)

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23
Q

What does the streams method, filter, do?

A

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24
Q

What does the streams method, map, do?

A

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25
What does the streams method, reduce, do?
Combines all elements in a stream into one element
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What does the .wait method do to a thread?
Moves a thread from the running state to the waiting state
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What interface defines the void run method for threads?
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What is a Collector?
A mutable reduction operation that accumulates input elements into a mutable result container, optionally transforming the accumulated result into a final representation after all input elements have been processed.
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What is a Deque?
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What is a functional interface?
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What is a HashMap?
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What is a HashSet?
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What is a HashTable?
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What is a Instant class?
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What is a Linked List?
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What is a Map?
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What is a mutex?
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What is an Array List?
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What is an intermediate operation of streams?
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What is a predicate?
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What is a race condition?
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What is a reentrant lock and how is it used in java synchronization?
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What is a semaphore?
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What is a terminating operation of streams?
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What is a thread?
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What is a TreeMap?
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What is a TreeSet?
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What is a Vector?
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What is caching?
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What is covariance?
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What is method overloading?
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What is method overriding?
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What is mutual exclusion?
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What is over/under flow (widening and narrowing)?
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What is parallelism in java multithreading?
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What is starvation?
When a thread cannot access a shared resource due to other threads using too frequently
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What is the callable interface?
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What is the Collection interface?
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What is the Collections class?
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What is the Date Time api?
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What is the difference between a checked and unchecked exception?
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What is the difference between a HashTable and a HashMap?
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What is the difference between a List and a Set?
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What is the difference between a Set and a Queue?
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What is the difference between Errors and Exceptions?
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What is the difference between final, finalize, and finally?
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What is the difference between java8 date time api vs java7 date time api (why did they remake it?
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What is the difference between throw and throws?
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What is the executor design pattern?
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What is the executor interface?
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What is the factory design pattern?
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What is the Iterable interface?
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What is the java.util.function package?
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What is the producer consumer problem?
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What is the purpose of connection pooling in jdbc or other connection style implementations?
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What is the purpose of the Collections API
A collections framework represents a unified application programming interface for not only representing collections of objects, but also for manipulating them in a consistent manner at a high enough level of abstraction to encourage reusability and good object-oriented design.
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What is the purpose of the thread schedular?
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What is the ReadWriteLock interface in java and what are some notable subclasses?
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What is the Runnable design pattern?
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What is the singleton design pattern?
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What is the stream api?
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What is thread pooling?
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What is type casting?
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What is up and down casting?
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When adding the synchronized keyword to the method signature, what object is used for the key?
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Which class can we extend to create a custom thread in java?
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Revature QC (6 decks)

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