Which of the following commands can be used to safely turn off a Linux host?
A. shutdown
B. exit
C. reboot
D. sleep
Answer: A. shutdown
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In the following function prototype, how many parameter variables does this function have?
int myFunction(double, double, double); a. 1 b. 2 c. 3 d. cannot tell from the prototype
Records in a sequential file are not usually updated in place. Instead ________.
a. the updated data is placed in a “surrogate” file b. the entire file is usually rewritten c. the file is truncated d. The above statement is false—records in sequential files are usually updated in place.
Clicking the Save As button automatically stores a file using the original name, drive, and folder where it was previously stored.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. A data element is a single, meaningful unit of data, such as a name, a social security number, or a temperature reading. 2. Most computers can store and manipulate pure binary integers, floating-point numbers, decimal numbers, and character or string data. 3. If the data elements are stored according to a consistent and well understood structure, it is possible to retrieve them by remembering that data structure. 4. In a linked list, each node contains only data. 5. A stack is a type of linked list in which all insertions and deletions occur at the end or bottom. Access to the stack is controlled by a single pointer.