Is there any output from sleep? Where does cat get its input from? What has to happen before the shell will display a prompt?
Enter the following command:
$ sleep 30 | cat /etc/services
There is no output from sleep (try giving the command sleep 30 by itself). The
/etc/services file provides input for cat (when cat has an argument, it does not
check standard input). The sleep command has to run to completion before
the shell will display a prompt.
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Given the class definition,
``` class A { public: A(){} A(int x, char y):xx(x), yy(y) {} // other members private: int xx; char yy; ``` Tell which definition below is legal. If legal, tell whether it is a definition of an object of class A. If the definition is a legal and defines a class A object, tell which constructor is called for each of the following definitions. Identify the constructor like this: If the constructor for class A with two int arguments is called, respond with A(int, int). a)``` A x(2, ‘A’); ``` b)``` A x; ``` c)``` A x(1); ``` e)``` A x( ); ```
What is a graph with one node called?
a. A connected graph b. A disconnected graph c. Singleton d. Such a graph cannot exist
When referencing field names within an expression, surround the field name with ____.
A. [square brackets] B. {curly brackets} C. (parentheses) D. "quotation marks"
USB flash drives consist of flash memory media integrated into a self-contained unit that connects to a computer or other device via a(n) ____________________ port and is powered via that port.
Fill in the blank(s) with the appropriate word(s).