81. The simplest way of transferring control is for the old primary to receive __________ from the old backup site. a. Undo logs b. Redo Logs c. Primary Logs d. All of the mentioned

85. A transaction commits as soon as its commit log record is written to stable storage at the primary and the backup site.This is a. One Safe b. Two Safe c. Two-very Safe d. Very Safe

When the user runs a program and hits ctrl-c, what happens? a) SIGINT is sent to only the foreground process b) SIGHUP followed by SIGCONT is sent to all background processes c) SIGINT is sent only to the children of the foreground process d) SIGINT is sent to all processes in the foreground process group

Check out the Unix/Linux commands ps and kill and their various options. a) Use the ps command to get a list of all your processes and save them in a log.txt file. At a minimum, the following 4 attributes should be recorded in the file for each process: name, process ID (PID), memory usage and CPU time. Attach the generated log file as an answer to this question. b) Open a terminal and get the PID of your editor process. Use the kill command to shut down the editor process. In your answer, show the commands you used to achieve the goal and explain what is what for each command. c) Write a C program that will start an editor process, get its PID, wait 3 seconds, and then terminate the editor process (You can use the exec family of system calls (man exec) to start any program or command from within a C program). d) Write a C program that will constantly monitor all processes (let's say once a second) and kill an editor immediately if it encounters an editor.

find The find command takes a pattern as a command-line argument and recur- sively searches through directories to find a filename matching that pattern. It should print a relative path starting with "./" for every file/directory that matches. For example, running ./find 1s.c from within the hw2 directory should print ./1s.c. If run from the parent directory, the output would be . /hw2/1s.c. There may be multiple matches. If we run ./find .c from within the hw2 directory, we should see: ./find.c ./1s.c ./tree.c The output does not need to be sorted. If nothing matches, it shouldn't print anything. Pattern matching should be case sensitive.

In    a    cooperative    mode,    if    a    user    program    does    not    give    up    CPU,    how    can    you    re-gain    the    control    of    the    system? A.    RebootB.    Control^CC.    Wait    till    it    is    done.D.    None    of    the    above    would    work.