Describe the parts of a magnetic hard disk.
What will be an ideal response?
A magnetic hard drive has one, two, or more platters, or disks, that stack together and spin in unison inside a sealed metal housing that contains firmware to control reading and writing data to the drive and to communicate with the motherboard. The top and bottom of each disk have a read/write head that moves across the disk surface as all the disks rotate on a spindle. The read/write heads are controlled by an actuator, which moves the read/write heads across the disk surfaces in unison. The disk surfaces are covered with a magnetic medium that can hold data as magnetized spots.
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Non-static function members of a class gain access to the calling object’s members by
a. a pointer to the calling object that is implicitly provided by the compiler. The name of this pointer is this. Members are prefixed implicitly by this->, as in this->membername b. a variable called self that is an alias for the calling object. This self is used to access the members of the object. c. There is no particular mechanism, the variables just know what the calling object is and automatically refer to the calling object. d. None of the above.
Elements support attributes that specify the use, the behavior, and in some cases the appearance of an element.
Answer the following statement true (T) or false (F)
Which single command could you give to log in as root on the remote sys- tem named plum, if plum has remote root logins disabled? Assume you are running the command as a user without root privileges, you have not set up an automatic login for ssh, and you have the same username on both systems.
What will be an ideal response?
Each atomic value has a(n) _____ that describes the kind of data it contains.
Fill in the blank(s) with the appropriate word(s).