Which of the following is a specialized piece of hardware designed to encrypt and decrypt user traffic?
A. Proxy server
B. TDR
C. Smart jack
D. VPN concentrator
Answer: D. VPN concentrator
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Which of the following statements is false?
a. If several synchronized statements in different threads are trying to execute on an object at the same time, only one of them may be active on the object—all the other threads attempting to enter a synchronized statement on the same object are placed in the blocked state. b. When a synchronized statement finishes executing, the object’s monitor lock is released and one of the blocked threads attempting to enter a synchronized statement can be allowed to acquire the lock to proceed. c. Java also allows synchronized methods. Before executing, a synchronized instance method must acquire the lock on the object that’s used to call the method. d. Using a synchronized block to enforce mutual exclusion is an example of the design pattern known as the Java Exclusion Pattern.
Which of these “properties” of testing using stubs and drivers are correct?
a. Using drivers and stubs is a lot of work for not much gain. b. Using drivers and stubs avoids trying to debug a large program all at once. c. Testing the pieces is difficult to do in any significant way. You need the entire program to run a meaningful test. d. Drivers run the pieces individually. They are temporary. They can be minimal, without i/o, having only data generating code, and not doing much (except possibly validating) with the information they return. e. Stubs are short programs that are fairly easy to write. They return only minimum data necessary for the caller to be debugged.
What should you always do before creating a new database?
A. backup the master system database B. install a fresh instance of SQL Server 2012 C. delete all existing temporary databases D. stop and restart the SQL Server service
Which of the below queries will format a value 1680 as $16,80.00?
A. SELECT TO_CHAR(1680.00,'$9,999V99') FROM dual; B. SELECT TO_CHAR(1680.00,'$9,999D99') FROM dual; C. SELECT TO_CHAR(1680.00,'$99G999D99') FROM dual; D. SELECT TO_CHAR(1680.00,'$99G99D99') FROM dual;