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Exam Code: 010-160

Exam Name Linux Essentials Certificate Exam, version 1.6

Certification Provider: LPI

Corresponding Certification: Linux Essentials

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Linux Essentials Certificate Exam, version 1.6 (010-160) Practice Tests

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LPI 010-160 Practice Test 15

Question 140

A command just ended and a technician wants the numeric exit status of that command. One student proposes Run echo $? immediately after the command and another proposes Run hash -r in Bash. Which technical comparison is the soundest?

  1. Run hash -r in Bash is more directly suited to last exit code inspection than Run echo $? immediately after the command, regardless of the stated constraint.
  2. Run echo $? immediately after the command is used because The special parameter $? expands to the most recently completed foreground command's exit status. The alternative Run hash -r in Bash addresses Bash command lookup refresh instead.
  3. The two actions are interchangeable for last exit code inspection and necessarily have the same main result.
  4. Run echo "$name" at the Bash prompt is the only useful action for last exit code inspection; Run echo $? immediately after the command has no relevant effect.

Explanation

Correct Answer

B:

Correct distinction: Run echo $? immediately after the command targets last exit code inspection; The special parameter $? expands to the most recently completed foreground command's exit status. The compared alternative instead serves Bash command lookup refresh.

Incorrect Answers

A:

Incorrect mapping: Run hash -r in Bash is used for Bash command lookup refresh. It does not displace Run echo $? immediately after the command for the described requirement.

C:

The mechanisms are different: The special parameter $? expands to the most recently completed foreground command's exit status. By contrast, hash -r clears Bash's remembered executable path locations for future lookup. They are not universally interchangeable.

D:

The third option addresses Bash variable expansion: Double-quoted parameter expansion replaces $name with its value while preserving it as one argument. The original action remains relevant because The special parameter $? expands to the most recently completed foreground command's exit status.

Question 141

A user needs a path under their own home directory without typing the account name. Which action most directly addresses this requirement on a Linux-related system?

  1. Run hash -r in Bash
  2. Run echo "$name" at the Bash prompt
  3. Run export APP_MODE=training before starting the script
  4. Use ~/Documents as the path in the shell

Explanation

Correct Answer

D:

Correct for home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory.

Incorrect Answers

A:

This action targets Bash command lookup refresh: hash -r clears Bash's remembered executable path locations for future lookup. The stated task instead calls for home directory tilde expansion.

B:

This action targets Bash variable expansion: Double-quoted parameter expansion replaces $name with its value while preserving it as one argument. The stated task instead calls for home directory tilde expansion.

C:

This action targets exported environment variable: export marks the variable for inclusion in child processes' environments. The stated task instead calls for home directory tilde expansion.

Question 142

An operator follows this instruction: Use ~/Documents as the path in the shell. For the task described as "home directory tilde expansion", what is the most accurate expected result?

  1. An unquoted leading tilde expands to the current user's home directory.
  2. hash -r clears Bash's remembered executable path locations for future lookup.
  3. Double-quoted parameter expansion replaces $name with its value while preserving it as one argument.
  4. export marks the variable for inclusion in child processes' environments.

Explanation

Correct Answer

A:

Correct consequence of Use ~/Documents as the path in the shell. This outcome explains its use for home directory tilde expansion.

Incorrect Answers

B:

This outcome belongs to Bash command lookup refresh and would follow Run hash -r in Bash; it is not the principal result of Use ~/Documents as the path in the shell.

C:

This outcome belongs to Bash variable expansion and would follow Run echo "$name" at the Bash prompt; it is not the principal result of Use ~/Documents as the path in the shell.

D:

This outcome belongs to exported environment variable and would follow Run export APP_MODE=training before starting the script; it is not the principal result of Use ~/Documents as the path in the shell.

Question 143

A user needs a path under their own home directory without typing the account name. A teammate tries this different approach instead: Run hash -r in Bash. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Run hash -r in Bash
  2. Use ~/Documents as the path in the shell
  3. Run echo "$name" at the Bash prompt
  4. Run export APP_MODE=training before starting the script

Explanation

Correct Answer

B:

Replace the attempt with this step: An unquoted leading tilde expands to the current user's home directory. It fits home directory tilde expansion.

Incorrect Answers

A:

This step is specific to Bash command lookup refresh: hash -r clears Bash's remembered executable path locations for future lookup. It does not fix the stated requirement for home directory tilde expansion.

C:

This step is specific to Bash variable expansion: Double-quoted parameter expansion replaces $name with its value while preserving it as one argument. It does not fix the stated requirement for home directory tilde expansion.

D:

This step is specific to exported environment variable: export marks the variable for inclusion in child processes' environments. It does not fix the stated requirement for home directory tilde expansion.

Question 144

A user needs a path under their own home directory without typing the account name. One student proposes Use ~/Documents as the path in the shell and another proposes Run echo "$name" at the Bash prompt. Which technical comparison is the soundest?

  1. Run echo "$name" at the Bash prompt is more directly suited to home directory tilde expansion than Use ~/Documents as the path in the shell, regardless of the stated constraint.
  2. The two actions are interchangeable for home directory tilde expansion and necessarily have the same main result.
  3. Use ~/Documents as the path in the shell is used because An unquoted leading tilde expands to the current user's home directory. The alternative Run echo "$name" at the Bash prompt addresses Bash variable expansion instead.
  4. Run export APP_MODE=training before starting the script is the only useful action for home directory tilde expansion; Use ~/Documents as the path in the shell has no relevant effect.

Explanation

Correct Answer

C:

Correct distinction: Use ~/Documents as the path in the shell targets home directory tilde expansion; An unquoted leading tilde expands to the current user's home directory. The compared alternative instead serves Bash variable expansion.

Incorrect Answers

A:

Incorrect mapping: Run echo "$name" at the Bash prompt is used for Bash variable expansion. It does not displace Use ~/Documents as the path in the shell for the described requirement.

B:

The mechanisms are different: An unquoted leading tilde expands to the current user's home directory. By contrast, Double-quoted parameter expansion replaces $name with its value while preserving it as one argument. They are not universally interchangeable.

D:

The third option addresses exported environment variable: export marks the variable for inclusion in child processes' environments. The original action remains relevant because An unquoted leading tilde expands to the current user's home directory.

Question 145

An executable was moved and Bash continues using a cached old executable location. Which action most directly addresses this requirement on a Linux-related system?

  1. Run hash -r in Bash
  2. Run echo "$name" at the Bash prompt
  3. Run export APP_MODE=training before starting the script
  4. Run the history built-in

Explanation

Correct Answer

A:

Correct for Bash command lookup refresh: hash -r clears Bash's remembered executable path locations for future lookup.

Incorrect Answers

B:

This action targets Bash variable expansion: Double-quoted parameter expansion replaces $name with its value while preserving it as one argument. The stated task instead calls for Bash command lookup refresh.

C:

This action targets exported environment variable: export marks the variable for inclusion in child processes' environments. The stated task instead calls for Bash command lookup refresh.

D:

This action targets shell command history: history shows the shell's retained command history entries. The stated task instead calls for Bash command lookup refresh.

Question 146

An operator follows this instruction: Run hash -r in Bash. For the task described as "Bash command lookup refresh", what is the most accurate expected result?

  1. Double-quoted parameter expansion replaces $name with its value while preserving it as one argument.
  2. hash -r clears Bash's remembered executable path locations for future lookup.
  3. export marks the variable for inclusion in child processes' environments.
  4. history shows the shell's retained command history entries.

Explanation

Correct Answer

B:

Correct consequence of Run hash -r in Bash. This outcome explains its use for Bash command lookup refresh.

Incorrect Answers

A:

This outcome belongs to Bash variable expansion and would follow Run echo "$name" at the Bash prompt; it is not the principal result of Run hash -r in Bash.

C:

This outcome belongs to exported environment variable and would follow Run export APP_MODE=training before starting the script; it is not the principal result of Run hash -r in Bash.

D:

This outcome belongs to shell command history and would follow Run the history built-in; it is not the principal result of Run hash -r in Bash.

Question 147

An executable was moved and Bash continues using a cached old executable location. A teammate tries this different approach instead: Run echo "$name" at the Bash prompt. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Run echo "$name" at the Bash prompt
  2. Run export APP_MODE=training before starting the script
  3. Run hash -r in Bash
  4. Run the history built-in

Explanation

Correct Answer

C:

Replace the attempt with this step: hash -r clears Bash's remembered executable path locations for future lookup. It fits Bash command lookup refresh.

Incorrect Answers

A:

This step is specific to Bash variable expansion: Double-quoted parameter expansion replaces $name with its value while preserving it as one argument. It does not fix the stated requirement for Bash command lookup refresh.

B:

This step is specific to exported environment variable: export marks the variable for inclusion in child processes' environments. It does not fix the stated requirement for Bash command lookup refresh.

D:

This step is specific to shell command history: history shows the shell's retained command history entries. It does not fix the stated requirement for Bash command lookup refresh.

Question 148

An executable was moved and Bash continues using a cached old executable location. One student proposes Run hash -r in Bash and another proposes Run export APP_MODE=training before starting the script. Which technical comparison is the soundest?

  1. Run export APP_MODE=training before starting the script is more directly suited to Bash command lookup refresh than Run hash -r in Bash, regardless of the stated constraint.
  2. The two actions are interchangeable for Bash command lookup refresh and necessarily have the same main result.
  3. Run the history built-in is the only useful action for Bash command lookup refresh; Run hash -r in Bash has no relevant effect.
  4. Run hash -r in Bash is used because hash -r clears Bash's remembered executable path locations for future lookup. The alternative Run export APP_MODE=training before starting the script addresses exported environment variable instead.

Explanation

Correct Answer

D:

Correct distinction: Run hash -r in Bash targets Bash command lookup refresh; hash -r clears Bash's remembered executable path locations for future lookup. The compared alternative instead serves exported environment variable.

Incorrect Answers

A:

Incorrect mapping: Run export APP_MODE=training before starting the script is used for exported environment variable. It does not displace Run hash -r in Bash for the described requirement.

B:

The mechanisms are different: hash -r clears Bash's remembered executable path locations for future lookup. By contrast, export marks the variable for inclusion in child processes' environments. They are not universally interchangeable.

C:

The third option addresses shell command history: history shows the shell's retained command history entries. The original action remains relevant because hash -r clears Bash's remembered executable path locations for future lookup.

Question 149

A user needs detailed local documentation for the options supported by ls. Which action most directly addresses this requirement on a Linux-related system?

  1. Run info coreutils
  2. Run man ls
  3. Look in /usr/share/doc/ for that package's documentation
  4. Run man -k followed by the keyword

Explanation

Correct Answer

B:

Correct for manual page for command: man displays the installed manual page for the command.

Incorrect Answers

A:

This action targets GNU Info navigation: info opens hyperlinked Info documentation for installed GNU packages. The stated task instead calls for manual page for command.

C:

This action targets installed package documentation: The directory commonly holds package-specific installed documentation and examples. The stated task instead calls for manual page for command.

D:

This action targets keyword manual search: man -k searches manual-page descriptions by keyword using the whatis database. The stated task instead calls for manual page for command.

Question 150

An operator follows this instruction: Run man ls. For the task described as "manual page for command", what is the most accurate expected result?

  1. info opens hyperlinked Info documentation for installed GNU packages.
  2. The directory commonly holds package-specific installed documentation and examples.
  3. man displays the installed manual page for the command.
  4. man -k searches manual-page descriptions by keyword using the whatis database.

Explanation

Correct Answer

C:

Correct consequence of Run man ls. This outcome explains its use for manual page for command.

Incorrect Answers

A:

This outcome belongs to GNU Info navigation and would follow Run info coreutils; it is not the principal result of Run man ls.

B:

This outcome belongs to installed package documentation and would follow Look in /usr/share/doc/ for that package's documentation; it is not the principal result of Run man ls.

D:

This outcome belongs to keyword manual search and would follow Run man -k followed by the keyword; it is not the principal result of Run man ls.