101-400 pack（41 to 50） for consumer: Jul 2021 Edition
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Q41. - (Topic 3)
Which grep command will print only the lines that do not end with a / in the file foo?
A. grep '/$' foo
B. grep '/#' foo
C. grep -v '/$' foo
D. grep -v '/#' foo
Q42. - (Topic 3)
What is the output of the following command?
echo "Hello World" | tr -d aieou
A. Hello World
C. Hll Wrld
D. eoo Hll Wrld
Q43. - (Topic 4)
How many fields are in a syntactically correct line of /etc/fstab?
Q44. - (Topic 1)
Which of the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)
A. shutdown -R 1 now
B. shutdown -single now
C. init 1
D. telinit 1
E. runlevel 1
Q45. - (Topic 3)
Which of the following statements is correct regarding the command foo 1> bar?
A. The stdout from the command foo is appended to the file bar.
B. The stdout from the command foo overwrites the file bar.
C. The command foo receives its stdin from the file bar.
D. The command foo receives its stdin from the stdout of the command bar.
E. The stderr from the command foo is saved to the file bar.
Q46. - (Topic 1)
Which of the following options for the kernel's command line changes the systemd boot target to rescue.target instead of the default target?
Q47. - (Topic 1)
What is the first program that is usually started, at boot time, by the Linux kernel when using SysV init?
Q48. - (Topic 3)
Immediately after deleting 3 lines of text in vi and moving the cursor to a different line, which single character command will insert the deleted content below the current line?
A. i (lowercase)
B. P (uppercase)
C. p (lowercase)
D. U (uppercase)
E. u (lowercase)
Q49. - (Topic 4)
Which of the following commands shows the definition of a given shell command?
Q50. - (Topic 3)
When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?