Prutor CSS Quiz 5 answers AKTU
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Q:1. Chroot jail is used to _______ process and its children by ________ to the supplied directory name.
(a).isolate, changing the root directory
(b).change, the name
(c).execute, renaming it
(d).All of the above
Answer - (b) change,the name
Reason -: A chroot on Unix operating system is an operation that changes the apparent root directory for the current running process and it's children.
Q:2. Taliking about FreeBSD jail, which of the following is true ?
(a).It can only bind to sockets with specified IP address and authorized ports
(b).It can communicate with processes inside and outside of jail
(c).Root is limited (example: cannot load kernel modules)
(d).None of the above
Answer - (b) It can communicate with processes inside and outside of jail
Reason -: Free BSD jails are limited in the following ways : jailed processes cannot interact with processes in a different jail, or on the main host.
Q:3. Which of the following is incorrect for System call interposition?
(a).It tracks all the system service requests of processes.
(b).Each system request can be modified or denied.
(c).It is impossible to implement tools to trace, monitor, or virtualize processes.
(d).None of the above.
Answer - (c) It is impossible to implement tools to trace, monitor or virtualize processes
Reason -: system call interposition is a powerful method for regulating and monitoring program behaviour.
Q:4. Which of the following is a computer security utility which limits an application's access to the system by enforcing access policies for system calls?
(a).systrace
(b).NetBSD
(c).ptrace
(d).None of the above
Answer - (a) systrace
Reason -: to secure a computer system, it is important to understand the attacks that can be made against it. Systrace is a computer security utility which limits an application access to the system.
Q:5. Which of the following uses a call back mechanism in the kernel module to redirect system calls?
(a).systrace
(b).ptrace
(c).ostia
(d).NetBSD
Answer - (b) ptrace
Reason -: ptrace is used to control one process from another process. ptrace is a system call found in Unix and several unix-like operating system.
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