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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 14

Question 130

An operator follows this instruction: Prepend "$HOME/bin" to PATH and export PATH. For the task described as "PATH executable lookup", what is the most accurate expected result?

  1. A leading variable assignment applies to that command's environment rather than permanently changing the parent shell.
  2. PATH contains directories the shell searches when resolving external commands.
  3. The special parameter $? expands to the most recently completed foreground command's exit status.
  4. An unquoted leading tilde expands to the current user's home directory.

Explanation

Correct Answer

B:

Correct consequence of Prepend "$HOME/bin" to PATH and export PATH. This outcome explains its use for PATH executable lookup.

Incorrect Answers

A:

This outcome belongs to temporary assignment environment and would follow Prefix that command with LANG=C on the same command line; it is not the principal result of Prepend "$HOME/bin" to PATH and export PATH.

C:

This outcome belongs to last exit code inspection and would follow Run echo $? immediately after the command; it is not the principal result of Prepend "$HOME/bin" to PATH and export PATH.

D:

This outcome belongs to home directory tilde expansion and would follow Use ~/Documents as the path in the shell; it is not the principal result of Prepend "$HOME/bin" to PATH and export PATH.

Question 131

A custom utility in $HOME/bin is not found by its bare command name and the shell must search that directory. A teammate tries this different approach instead: Prefix that command with LANG=C on the same command line. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Prefix that command with LANG=C on the same command line
  2. Run echo $? immediately after the command
  3. Prepend "$HOME/bin" to PATH and export PATH
  4. Use ~/Documents as the path in the shell

Explanation

Correct Answer

C:

Replace the attempt with this step: PATH contains directories the shell searches when resolving external commands. It fits PATH executable lookup.

Incorrect Answers

A:

This step is specific to temporary assignment environment: A leading variable assignment applies to that command's environment rather than permanently changing the parent shell. It does not fix the stated requirement for PATH executable lookup.

B:

This step is specific to last exit code inspection: The special parameter $? expands to the most recently completed foreground command's exit status. It does not fix the stated requirement for PATH executable lookup.

D:

This step is specific to home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory. It does not fix the stated requirement for PATH executable lookup.

Question 132

A custom utility in $HOME/bin is not found by its bare command name and the shell must search that directory. One student proposes Prepend "$HOME/bin" to PATH and export PATH and another proposes Run echo $? immediately after the command. Which technical comparison is the soundest?

  1. Run echo $? immediately after the command is more directly suited to PATH executable lookup than Prepend "$HOME/bin" to PATH and export PATH, regardless of the stated constraint.
  2. The two actions are interchangeable for PATH executable lookup and necessarily have the same main result.
  3. Use ~/Documents as the path in the shell is the only useful action for PATH executable lookup; Prepend "$HOME/bin" to PATH and export PATH has no relevant effect.
  4. Prepend "$HOME/bin" to PATH and export PATH is used because PATH contains directories the shell searches when resolving external commands. The alternative Run echo $? immediately after the command addresses last exit code inspection instead.

Explanation

Correct Answer

D:

Correct distinction: Prepend "$HOME/bin" to PATH and export PATH targets PATH executable lookup; PATH contains directories the shell searches when resolving external commands. The compared alternative instead serves last exit code inspection.

Incorrect Answers

A:

Incorrect mapping: Run echo $? immediately after the command is used for last exit code inspection. It does not displace Prepend "$HOME/bin" to PATH and export PATH for the described requirement.

B:

The mechanisms are different: PATH contains directories the shell searches when resolving external commands. By contrast, The special parameter $? expands to the most recently completed foreground command's exit status. They are not universally interchangeable.

C:

The third option addresses home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory. The original action remains relevant because PATH contains directories the shell searches when resolving external commands.

Question 133

One command requires LANG=C without changing the interactive shell's persistent LANG value. Which action most directly addresses this requirement on a Linux-related system?

  1. Run echo $? immediately after the command
  2. Prefix that command with LANG=C on the same command line
  3. Use ~/Documents as the path in the shell
  4. Run hash -r in Bash

Explanation

Correct Answer

B:

Correct for temporary assignment environment: A leading variable assignment applies to that command's environment rather than permanently changing the parent shell.

Incorrect Answers

A:

This action targets last exit code inspection: The special parameter $? expands to the most recently completed foreground command's exit status. The stated task instead calls for temporary assignment environment.

C:

This action targets home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory. The stated task instead calls for temporary assignment environment.

D:

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 temporary assignment environment.

Question 134

An operator follows this instruction: Prefix that command with LANG=C on the same command line. For the task described as "temporary assignment environment", what is the most accurate expected result?

  1. The special parameter $? expands to the most recently completed foreground command's exit status.
  2. An unquoted leading tilde expands to the current user's home directory.
  3. A leading variable assignment applies to that command's environment rather than permanently changing the parent shell.
  4. hash -r clears Bash's remembered executable path locations for future lookup.

Explanation

Correct Answer

C:

Correct consequence of Prefix that command with LANG=C on the same command line. This outcome explains its use for temporary assignment environment.

Incorrect Answers

A:

This outcome belongs to last exit code inspection and would follow Run echo $? immediately after the command; it is not the principal result of Prefix that command with LANG=C on the same command line.

B:

This outcome belongs to home directory tilde expansion and would follow Use ~/Documents as the path in the shell; it is not the principal result of Prefix that command with LANG=C on the same command line.

D:

This outcome belongs to Bash command lookup refresh and would follow Run hash -r in Bash; it is not the principal result of Prefix that command with LANG=C on the same command line.

Question 135

One command requires LANG=C without changing the interactive shell's persistent LANG value. A teammate tries this different approach instead: Run echo $? immediately after the command. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Run echo $? immediately after the command
  2. Use ~/Documents as the path in the shell
  3. Run hash -r in Bash
  4. Prefix that command with LANG=C on the same command line

Explanation

Correct Answer

D:

Replace the attempt with this step: A leading variable assignment applies to that command's environment rather than permanently changing the parent shell. It fits temporary assignment environment.

Incorrect Answers

A:

This step is specific to last exit code inspection: The special parameter $? expands to the most recently completed foreground command's exit status. It does not fix the stated requirement for temporary assignment environment.

B:

This step is specific to home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory. It does not fix the stated requirement for temporary assignment environment.

C:

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 temporary assignment environment.

Question 136

One command requires LANG=C without changing the interactive shell's persistent LANG value. One student proposes Prefix that command with LANG=C on the same command line and another proposes Use ~/Documents as the path in the shell. Which technical comparison is the soundest?

  1. Prefix that command with LANG=C on the same command line is used because A leading variable assignment applies to that command's environment rather than permanently changing the parent shell. The alternative Use ~/Documents as the path in the shell addresses home directory tilde expansion instead.
  2. Use ~/Documents as the path in the shell is more directly suited to temporary assignment environment than Prefix that command with LANG=C on the same command line, regardless of the stated constraint.
  3. The two actions are interchangeable for temporary assignment environment and necessarily have the same main result.
  4. Run hash -r in Bash is the only useful action for temporary assignment environment; Prefix that command with LANG=C on the same command line has no relevant effect.

Explanation

Correct Answer

A:

Correct distinction: Prefix that command with LANG=C on the same command line targets temporary assignment environment; A leading variable assignment applies to that command's environment rather than permanently changing the parent shell. The compared alternative instead serves home directory tilde expansion.

Incorrect Answers

B:

Incorrect mapping: Use ~/Documents as the path in the shell is used for home directory tilde expansion. It does not displace Prefix that command with LANG=C on the same command line for the described requirement.

C:

The mechanisms are different: A leading variable assignment applies to that command's environment rather than permanently changing the parent shell. By contrast, An unquoted leading tilde expands to the current user's home directory. They are not universally interchangeable.

D:

The third option addresses Bash command lookup refresh: hash -r clears Bash's remembered executable path locations for future lookup. The original action remains relevant because A leading variable assignment applies to that command's environment rather than permanently changing the parent shell.

Question 137

A command just ended and a technician wants the numeric exit status of that command. Which action most directly addresses this requirement on a Linux-related system?

  1. Use ~/Documents as the path in the shell
  2. Run hash -r in Bash
  3. Run echo $? immediately after the command
  4. Run echo "$name" at the Bash prompt

Explanation

Correct Answer

C:

Correct for last exit code inspection: The special parameter $? expands to the most recently completed foreground command's exit status.

Incorrect Answers

A:

This action targets home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory. The stated task instead calls for last exit code inspection.

B:

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 last exit code inspection.

D:

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 last exit code inspection.

Question 138

An operator follows this instruction: Run echo $? immediately after the command. For the task described as "last exit code inspection", 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. The special parameter $? expands to the most recently completed foreground command's exit status.

Explanation

Correct Answer

D:

Correct consequence of Run echo $? immediately after the command. This outcome explains its use for last exit code inspection.

Incorrect Answers

A:

This outcome belongs to home directory tilde expansion and would follow Use ~/Documents as the path in the shell; it is not the principal result of Run echo $? immediately after the command.

B:

This outcome belongs to Bash command lookup refresh and would follow Run hash -r in Bash; it is not the principal result of Run echo $? immediately after the command.

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 Run echo $? immediately after the command.

Question 139

A command just ended and a technician wants the numeric exit status of that command. A teammate tries this different approach instead: Use ~/Documents as the path in the shell. The requirement is still unmet. Which corrective action should replace the misapplied approach?

  1. Run echo $? immediately after the command
  2. Use ~/Documents as the path in the shell
  3. Run hash -r in Bash
  4. Run echo "$name" at the Bash prompt

Explanation

Correct Answer

A:

Replace the attempt with this step: The special parameter $? expands to the most recently completed foreground command's exit status. It fits last exit code inspection.

Incorrect Answers

B:

This step is specific to home directory tilde expansion: An unquoted leading tilde expands to the current user's home directory. It does not fix the stated requirement for last exit code inspection.

C:

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 last exit code inspection.

D:

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 last exit code inspection.

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.