Java Flashcards
Describe caching in a cpu.
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Describe deadlock.
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Describe visibility of a variable.
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Describe volatility and the volatile keyword.
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Does a thread get its own heap?
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Does a thread get its own stack?
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Give examples of some concurrency safe collections.
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Give some examples of collections that are not concurrency safe.
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How can enums help with making singletons thread safe?
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How can we alter the singleton design pattern to be thread safe?
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How do we fix race conditions?
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In java multithreading, what is the monitor design pattern?
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Is the classic singleton design pattern thread safe?
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What are Consumer interfaces?
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What are locks and keys?
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What are Predicate interfaces, and what do they return?
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What are the states of a thread?
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What design pattern can we use to reuse threads and minimize the overhead in an application?
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What does the .interrupt method do to a thread?
Moves a thread from the running state to the runnable state
What does the .join method do to a thread?
Calling thread enters the waiting state until the referenced thread terminates
What does the .notifyAll method do?
All threads are moved from the waiting state to the runnable state
What does the .notify method do to a thread?
One thread is moved from the waiting state to runnable state (chosen by the schedular)
What does the streams method, filter, do?
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What does the streams method, map, do?
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What does the streams method, reduce, do?
Combines all elements in a stream into one element
What does the .wait method do to a thread?
Moves a thread from the running state to the waiting state
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.
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
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.
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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