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27. Which command removes all commas from the string '1,696, 807'? (a)"${s/,/}" (b)"${s/,/g)" (c)"${s///}" (d)"S{s///}" (e)none of the above data-context-item- 28. Consider s='class="context-data-item" views="16,291,016 views" data-context-item-user=\"thelonelyisland" " expr "$s": ".*data-context-item-\"\(.*\) views. *" will return (a)16,291,016 (b)16291016 (c)-user (d)thelonelyisland (e)none of the above 29. echo 'drwxr-xr-x+, 1, CS288, None, 123, Dec, 25, 2013 | cut -d',' - £2 will return (a)drwxr (c) I (d) CS288 (c)none of the above 30. echo 'drwxr-xr-x+, 1, CS288, None, 123, Dec, 25, 2013 | cut -f'-' -d3 will return (a)drwxr (d) 1 (e)none of the above (b)xr (b)xr (c)x+

27. Which command removes all commas from the string '1,696, 807'? (a)"${s/,/}" (b)"${s/,/g)" (c)"${s///}" (d)"S{s///}" (e)none of the above data-context-item- 28. Consider s='class="context-data-item" views="16,291,016 views" data-context-item-user=\"thelonelyisland" " expr "$s": ".*data-context-item-\"\(.*\) views. *" will return (a)16,291,016 (b)16291016 (c)-user (d)thelonelyisland (e)none of the above 29. echo 'drwxr-xr-x+, 1, CS288, None, 123, Dec, 25, 2013 | cut -d',' - £2 will return (a)drwxr (c) I (d) CS288 (c)none of the above 30. echo 'drwxr-xr-x+, 1, CS288, None, 123, Dec, 25, 2013 | cut -f'-' -d3 will return (a)drwxr (d) 1 (e)none of the above (b)xr (b)xr (c)x+

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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please give right answers do not use other webiste and vhatgpt for this answer its giving wring answers all time please 27 29 30 please asnwer corractly 

### Sample Shell Commands and Their Output This document explains several shell commands and their outputs. Follow through the commands and options used for string manipulation and data extraction using common Linux commands. #### 27. Removing Commas from a String **Question:** Which command removes all commas from the string `'1,696,807'`? **Options:** a) `"${s//,/}"` b) `${s/,//g}` c) `${s/,/}` d) `"${s/,/}"` e) none of the above #### 28. Pattern Matching and Data Extraction **Question:** Consider the variable `s` defined as shown below: ```sh s='<class="context-data-item" data-context-item-views="16,291,016 views" data-context-item-user="thelonelyisland">' ``` The command: ```sh expr "$s" : '.*data-context-item="\(.*\), views.*"' ``` will return: **Options:** a) 16,291,016 b) 16291016 c) user d) thelonelyisland e) none of the above #### 29. Using `cut` Command with Delimiters **Question:** What will the command below return? ```sh echo 'drwxr-xr-x+,1,CS288,None,123,Dec,25,2013' | cut -d ',' -f2 ``` **Options:** a) drwxr b) xr c) 1 d) CS288 e) none of the above #### 30. Using `cut` Command with Field Separators **Question:** What will the command below return? ```sh echo 'drwxr-xr-x+,1,CS288,None,123,Dec,25,2013' | cut -f' -' -d3 ``` **Options:** a) drwxr b) xr c) x+ d) 1 e) none of the above ### Explanation of Graphs/Diagrams There are no graphs or diagrams present in this document. The document consists entirely of text-based questions related to shell commands and their outputs. Each question evaluates the command's ability to manipulate strings or format data properly using shell scripting techniques. --- Understanding these commands is crucial
Transcribed Image Text:### Sample Shell Commands and Their Output This document explains several shell commands and their outputs. Follow through the commands and options used for string manipulation and data extraction using common Linux commands. #### 27. Removing Commas from a String **Question:** Which command removes all commas from the string `'1,696,807'`? **Options:** a) `"${s//,/}"` b) `${s/,//g}` c) `${s/,/}` d) `"${s/,/}"` e) none of the above #### 28. Pattern Matching and Data Extraction **Question:** Consider the variable `s` defined as shown below: ```sh s='<class="context-data-item" data-context-item-views="16,291,016 views" data-context-item-user="thelonelyisland">' ``` The command: ```sh expr "$s" : '.*data-context-item="\(.*\), views.*"' ``` will return: **Options:** a) 16,291,016 b) 16291016 c) user d) thelonelyisland e) none of the above #### 29. Using `cut` Command with Delimiters **Question:** What will the command below return? ```sh echo 'drwxr-xr-x+,1,CS288,None,123,Dec,25,2013' | cut -d ',' -f2 ``` **Options:** a) drwxr b) xr c) 1 d) CS288 e) none of the above #### 30. Using `cut` Command with Field Separators **Question:** What will the command below return? ```sh echo 'drwxr-xr-x+,1,CS288,None,123,Dec,25,2013' | cut -f' -' -d3 ``` **Options:** a) drwxr b) xr c) x+ d) 1 e) none of the above ### Explanation of Graphs/Diagrams There are no graphs or diagrams present in this document. The document consists entirely of text-based questions related to shell commands and their outputs. Each question evaluates the command's ability to manipulate strings or format data properly using shell scripting techniques. --- Understanding these commands is crucial
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