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2021 Sep 101-400 book

Q41. - (Topic 3) 

Which of the following commands will NOT update the modify timestamp on the file /tmp/myfile.txt? 

A. file /tmp/myfile.txt 

B. echo "Hello" >/tmp/myfile.txt 

C. sed -ie "s/1/2/" /tmp/myfile.txt 

D. echo -n "Hello" >>/tmp/myfile.txt 

E. touch /tmp/myfile.txt 

Answer: A 


Q42. - (Topic 3) 

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter? 

A. sed '/bob/Bob' letter > newletter 

B. sed s/bob/Bob/ letter < newletter 

C. sed 's/bob/Bob' letter > newletter 

D. sed 's/bob/Bob/g' letter > newletter 

E. sed 's/bob, Bob/' letter > newletter 

Answer: D 


Q43. - (Topic 3) 

Which of the following commands moves and resumes in the background the last stopped shell job? 

A. run 

B. bg 

C. fg 

D. back 

Answer: B 


Q44. - (Topic 3) 

Which of the following commands determines the type of a file by using a definition database file which contains information about all common file types? 

A. magic 

B. type 

C. file 

D. pmagic 

E. hash 

Answer: C 


Q45. CORRECT TEXT - (Topic 3) 

Which signal is missing from the following command that is commonly used to instruct a daemon to reinitialize itself, including reading configuration files? 

killall -s _______ daemon 

Answer: HUP, SIGHUP, 1 


101-400 answers

Down to date 101-400 exam question:

Q46. - (Topic 2) 

Which of the following commands lists the dependencies of a given dpkg package? 

A. apt-cache depends-on package 

B. apt-cache dependencies package 

C. apt-cache depends package 

D. apt-cache requires package 

Answer: C 


Q47. - (Topic 3) 

What does the ? symbol within regular expressions represent? 

A. Match the preceding qualifier one or more times. 

B. Match the preceding qualifier zero or more times. 

C. Match the preceding qualifier zero or one times. 

D. Match a literal ? character. 

Answer: C 


Q48. - (Topic 1) 

Which of the following commands will write a message to the terminals of all logged in users? 

A. bcast 

B. mesg 

C. print 

D. wall 

E. yell 

Answer: D 


Q49. - (Topic 1) 

Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.) 

A. 0 

B. 1 

C. 3 

D. 5 

E. 6 

Answer: A,E 


Q50. CORRECT TEXT - (Topic 2) 

Which command will disable swapping on a device? (Specify ONLY the command without any path or parameters.) 

Answer: swapoff, /sbin/swapoff