Which statement is false?

a. All built-in collections are synchronized.
b. Concurrent access to a Collection by multiple threads could cause indeterminate results or fatal errors.
c. To prevent potential threading problems, synchronization wrappers are used around collection classes that might be accessed by multiple threads.
d. A synchronization wrapper class receives method calls, adds some functionality for thread safety and then delegates the calls to the wrapped class.


All built-in collections are synchronized. Actually, most built-in collections are unsynchronized by default for performance reasons.

Computer Science & Information Technology

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The following compilers exist on our LINUX system: cc, gcc, g++, and f77. These compilers were located in the /usr/bin and not in the /bin directory. We used the following command to locate the cc compiler and similar commands to locate other compilers. If a command does not display anything for a given compiler name, it means that that compiler doesn’t exist.

What will be an ideal response?

Computer Science & Information Technology

Polymorphism means ______________.

a. that data fields should be declared private b. that a class can extend another class c. that a variable of supertype can refer to a subtype object d. that a class can contain another class

Computer Science & Information Technology

Your home page displays status ________ posted by your connections

Fill in the blank(s) with correct word

Computer Science & Information Technology

Typing or inserting an actual SQL query or command as input (as opposed to a requested value, such as a user login name), gaining access to the tables, and then stealing or destroying data is an example of a(n) ____.

A. SQL query error B. SQL mistake C. SQL security reference D. SQL injection attack

Computer Science & Information Technology