Which constants are used to indicate that a ResultSet is scrollable, insensitive to changes and read only?
a. TYPE_SCROLLABLE_INSENSITIVE, CONCUR_READ_ONLY.
b. TYPE_SCROLLABLEINSENSITIVE, CONCUR_READONLY.
c. TYPE_SCROLL_INSENSITIVE, CONCUR_READ_ONLY.
d. TYPE_SCROLL_INSENSITIVE, CONCUR_READONLY.
D
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Can you find evidence of that in the log entries shown above? If so in what lines? Explain.
Operating system log file example a. Stored under /var/log, the messages file stores various system events. The connection of new USB drive, a network card becoming available, and too many missed root login attempts, are a few examples of events logged to the /var/log/messages file. Use the more command to display the contents of the /var/log/messages file. Unlike the cat command, more allows for a paced navigation through the file. Press ENTER to advance line-by-line or SPACE to advance an entire page. Press q or CTRL + C to abort and exit more. Your entries will be different than the output shown below.
[analyst@secOps ~]$ sudo more /var/log/messages [sudo] password for analyst: Mar 20 08:34:38 secOps kernel: [ 6.149910] random: crng init done Mar 20 08:34:40 secOps kernel: [ 8.280667] floppy0: no floppy controllers found Mar 20 08:34:40 secOps kernel: [ 8.280724] work still pending Mar 20 08:35:16 secOps kernel: [ 44.414695] hrtimer: interrupt took 5346452 ns Mar 20 14:28:29 secOps kernel: [21239.566409] pcnet32 0000:00:03.0 enp0s3: link down Mar 20 14:28:33 secOps kernel: [21243.404646] pcnet32 0000:00:03.0 enp0s3: link up, 100Mbps, full-duplex Mar 20 14:28:35 secOps kernel: [21245.536961] pcnet32 0000:00:03.0 enp0s3: link down Mar 20 14:28:43 secOps kernel: [21253.427459] pcnet32 0000:00:03.0 enp0s3: link up, 100Mbps, full-duplex Mar 20 14:28:53 secOps kernel: [21263.449480] pcnet32 0000:00:03.0 enp0s3: link down Mar 20 14:28:57 secOps kernel: [21267.500152] pcnet32 0000:00:03.0 enp0s3: link up, 100Mbps, full-duplex Mar 20 14:29:01 secOps kernel: [21271.551499] pcnet32 0000:00:03.0 enp0s3: link down Mar 20 14:29:05 secOps kernel: [21275.389707] pcnet32 0000:00:03.0 enp0s3: link up, 100Mbps, full-duplex Mar 22 06:01:40 secOps kernel: [ 0.000000] Linux version 4.8.12-2-ARCH (builduser@andyrtr) (gcc version 6.2.1 20160830 (GCC) ) #1 SMP PREEMPT Fri Dec 2 20:41:47 CET 2016 Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. Mar 22 06:01:40 secOps kernel: [ 0.000000] x86/fpu: Using 'eager' FPU context switches.Notice that the events listed above are very different from the web server events. Because the operating system itself is generating this log, all recorded events are in relation to the OS itself. b. If necessary, enter Ctrl + C to exit out of the previous command. c. Log files are very important for troubleshooting. Assume that a user of that specific system reported that all network operations were slow around 2:30pm.