R4RIN – MCQs, Mock Tests | jUnit Junit Mcq Question Set 4

The __________ command executes the given command at some time in the future.

1. Execution()
2. execute(Runnable command)
3. scheduleNext()
4. poll()

✅ Correct Answer: 2

The _______ exception can be thrown by the execute(Runnable command) function.

1. Arithmetic
2. ArrayIndexOutOfBounds
3. StringIndexOutOfBounds
4. RejectedExecutionException

✅ Correct Answer: 4

Other than RejectedExecutionException, the execute(Runnable command) function can also throw which exception?

1. Arithmetic
2. ArrayIndexOutOfBounds
3. StringIndexOutOfBounds
4. NullPointerException

✅ Correct Answer: 4

_______ runs all commands that are currently pending.

1. runUntilIdle
2. runPendingCommands
3. execute
4. isIdle

✅ Correct Answer: 2

_____ runs executed commands until there are no commands pending execution.

1. runUntilIdle
2. runPendingCommands
3. execute
4. isIdle

✅ Correct Answer: 1

__________ returns whether this executor is idle.

1. runUntilIdle
2. runPendingCommands
3. execute
4. isIdle

✅ Correct Answer: 4

_______ runs time forwards by a given duration, executing any commands scheduled for execution during that time period.

1. runUntilIdle
2. runPendingCommands
3. tick
4. isIdle

✅ Correct Answer: 3

When a call to tick returns, the executor will be idle.

1. True
2. False
3. all of the above
4. none of the above

✅ Correct Answer: 1

_________ blocks until all tasks have completed execution after a shutdown request, or the timeout occurs.

1. awaitTermination
2. runPendingCommands
3. tick
4. isIdle

✅ Correct Answer: 1

____ submits a value-returning task for execution and returns a Future representing the pending results of the task.

1. submit(Callable<T> task)
2. awaitTermination
3. submit(Runnable task, T result)
4. invokeAll()

✅ Correct Answer: 1

_______ submits a Runnable task for execution and returns a Future representing that task.

1. submit(Callable<T> task)
2. awaitTermination
3. submit(Runnable task, T result)
4. invokeAll()

✅ Correct Answer: 3

_______ returns true if all tasks have completed following shut down.

1. submit(Callable<T> task)
2. isTerminated
3. submit(Runnable task, T result)
4. invokeAll()

✅ Correct Answer: 2

________ returns true if this executor has been shut down.

1. isShutdown
2. isTerminated
3. submit(Runnable task, T result)
4. invokeAll()

✅ Correct Answer: 1

_________ is used for the execution of the given tasks, returning a list of Futures holding their status and results after completion.

1. isShutdown
2. isTerminated
3. invokeAll(Collection<? extends Callable<T>> tasks)
4. invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)

✅ Correct Answer: 3

_______ executes the given tasks, returning the result of one that has completed successfully.

1. isShutdown
2. invokeAny(Collection<? extends Callable<T>> tasks)
3. invokeAll(Collection<? extends Callable<T>> tasks)
4. invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)

✅ Correct Answer: 2

_______ exception is thrown while invokeAll() is interrupted while waiting.

1. InterruptedException
2. NullPointerException
3. RejectedExecutionException
4. ArrayIndexOutOfBoundsException

✅ Correct Answer: 1

NullPointerException is thrown if tasks or any of its elements are null.

1. True
2. False
3. all of the above
4. none of the above

✅ Correct Answer: 1

InterruptedException is thrown if any task cannot be scheduled for execution.

1. True
2. False
3. all of the above
4. none of the above

✅ Correct Answer: 1

_______ initiates an orderly shutdown in which previously submitted tasks are executed.

1. Shutdown
2. invokeAny(Collection<? extends Callable<T>> tasks)
3. invokeAll(Collection<? extends Callable<T>> tasks)
4. invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)

✅ Correct Answer: 1

Mutation testing is a form of ________

1. Black Box Testing
2. Redundancy
3. White Box Testing
4. Loss Testing

✅ Correct Answer: 3