Match the following protocols with their function
I. HTTP
II. FTP
III. SMTP
IV. DHCP
V. POP
A. Requesting/receiving an IP address
B. Receiving email
C. Requesting/delivering webpages
D. Transferring files between computers
E. Sending email
C, D, E, A, B
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When working with a report, add ____.
A. no more than three fields B. no more than five fields C. no more than seven fields D. as many fields as you would like
Answer the following statements true (T) or false (F)
1. The OS/JCL DD statement VOLUME (or VOL) parameter specifies a particular disk volume (or pack). 2. The OS/JCL DD statement DISP (disposition) parameter tells the system what to do with a disk file after the job step is completed. 3. On an OS/JCL DD statement DISP (disposition) parameter, the third DISP sub-parameter defines the file’s disposition following abnormal job termination. 4. The programmer must code the appropriate parameters to access the standard system input and output devices. 5. Sometimes, two or more DD statements, each in a different job step but still within the same job, are assigned the same DDNAME.
Modify the selection sort algorithm so it avoids the element move step if the element is already in the correct position. On what basis would you decide that the cost of this extra check outweighs the cost of not doing the check?
What will be an ideal response?
Which of the following statements about pipes is true?
a) A pipe serves as a buffer through which two or more processes can exchange data. b) The operating system synchronizes access to a pipe. c) After a process reads data from the pipe, the data is removed from the pipe. d) all of the above