Which of the following statements is false?
a. If an operation requires the executing thread to hold a lock while the operation is performed, a thread must relase the lock
before proceeding with the operation. Other threads attempting to perform an operation that requires the same lock will be
blocked until the first thread releases the lock, at which point the blocked threads may attempt to acquire the lock and proceed
with the operation.
b. To specify that a thread must hold a monitor lock to execute a block of code, the code should be placed in a synchronized
statement.
c. Code in a synchronized statement is said to be guarded by the monitor lock; a thread must acquire the lock to execute the guarded statements.
d. The monitor allows only one thread at a time to execute statements within synchronized statements that lock on the same
object, as only one thread at a time can hold the monitor lock. The synchronized statements are declared using the
synchronized keyword.
a. If an operation requires the executing thread to hold a lock while the operation is performed, a thread must relase the lock
before proceeding with the operation. Other threads attempting to perform an operation that requires the same lock will be
blocked until the first thread releases the lock, at which point the blocked threads may attempt to acquire the lock and proceed
with the operation.
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The breadth-first traversal of a graph uses a stack rather than a queue.
Answer the following statement true (T) or false (F)
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1. Overriding is when a derived class redefines a method from the base class. 2. A constructor for a derived class begins with an invocation of a constructor for the base class. 3. The call to the base class constructor (super) must always be the last action taken in a constructor definition. 4. You may substitute the keyword this for super() to call a constructor of the derived class. 5. An instance variable (or method) that is private in a base class is accessible by name in the definition of a method in any other class.