102.3 Manage Shared Libraries LPIC-1 Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A binary is linked against libfoo.so.1, but the system has libfoo.so.2. The developer insists the ABI is compatible. Which action would allow the binary to run without modifying the binary or the system library?

   • AUse patchelf to change the binary's NEEDED entry.
   • BSet LD_PRELOAD=/usr/lib/libfoo.so.2
   • CRun ldconfig to update the cache.
   • DCreate a symlink named libfoo.so.1 pointing to libfoo.so.2 in a directory listed in /etc/ld.so.conf, then run ldconfig.
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2. 7foundation · easy

   Which statement best describes the role of shared libraries in a Linux system?

   • AThey are loaded into memory only when a program that needs them is executed, allowing multiple programs to use the same code without each having a copy.
   • BThey are stored in the kernel and provide system call interfaces to user-space programs.
   • CThey are used only by system administrators to manage system configuration files.
   • DThey are statically linked into every executable at compile time, ensuring that each program has its own copy of the library code.
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4. 8foundation · easy

   Which command displays the shared library dependencies of an executable?

   • Aldconfig
   • Bld.so
   • Cnm
   • Dldd
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5. 9application · medium

   A sysadmin is troubleshooting a binary that works on one server but fails on another with 'libssl.so.1.1: cannot open shared object file'. Both servers run the same distribution version. Which command would best reveal whether the binary's dependency is satisfied by a different library on the working server?

   • Astrace -e openat /usr/bin/application
   • Breadelf -d /usr/bin/application
   • Cldconfig -p | grep ssl
   • Dldd /usr/bin/application
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6. 10expert · hard

   An administrator is troubleshooting a library that is not found by applications, even though it is listed in the ldconfig cache. Which of the following is the most likely cause?

   • AThe library's soname does not match the filename in the cache.
   • BThe library is in a directory not listed in /etc/ld.so.conf.
   • CThe library is corrupted.
   • DThe library is a static library.
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