A ____________ copy of an object is a copy that has no references in common with the original object.
(a) bit copy
(b) deep copy
(c) shallow copy
(d) none of the above
(b) deep copy
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By default, the head utility (Sobell, page 57) displays the first 10 lines of a file. Use head to display the first 10 lines of a file such as /etc/services.
What will be an ideal response?
Answer the following statements true (T) or false (F)
1. An istream object is already an ifstream object with some extra, added features. 2. When you write ifstream inStream; inStream.open(”infile.dat”); the file, infile.dat must be located in the directory where the program is being run. 3. When you use the open member function to tie a file name to a file stream, the file name is called the external file name, and the program refers to the file by the stream name. 4. A file is automatically closed when a program terminates, so there is never a need to close a file. 5. The flush member function copies the file buffer to the file on the file medium (disk, tape, etc).
The input dialog displayed by method showInputDialog contains a __________ compo- nent that enables the user to enter input.
a) JTextArea b) JTextField c) JLabel d) title bar
What port is used by DNS servers to issue queries?
A. UDP 53 B. TCP 53 C. UDP 54 D. TCP 54