Role-specific Linux Threads Interview Questions & Answers:

1. How to install certificate in ftp rhel5?

tell me all the detail

2. Suppose we have three threads T1, T2 and T3 which perform sequentially one after another is their any benefit of using thread over here rather than having a single process?

here T1, T2 and T3 as a thread consumes less memory and
more speed

but as a process it consumes more memory.

Example:

Multiple threads can be run within a single memory
allocations.

but process needs seperate memory allocations for each
process.

3. What is the use of thread over process?

Thread is an executable entity but it is bound to its parent
process.
now there are two types of threads.
1. user space threads and
2. kernel thread
now the kernel threads are actually known as light weight
processes.

why light weight????
>>>> as it's context switching times is lesser than all
other process.

now why the context switching time is less????
>>>>> as process have there own process address space and
maintains many more things like userID, ProcessID, groupID,
number of files opened, reisters and blah, blah
whereas thread shares it's parent process's address space
and mainly contains three things like own stack, registers
and thread related data.
so more things to swap need more time that's why thread's
context switching time is less compared to that of a process.

now the answer,
use of thread: thread are used to provide multi-programming
environment.
ok, now u ppl would think that, it can also be done creating
new processes (using fork())
yes we can,
but as i told earlier that the context switch time for
threads are very less.
moreover the inter-thread communication is more easier than
inter-process communication as all threads of a single
process uses the same address space.

4. What is crondtab daemon?

The cron daemon reads the /etc/cronlog.conf configuration
file provided by the user to log the information. If a
configuration file has not been created, then the cron
daemon creates a log of its activities in the
/var/adm/cron/log file. The cron daemon reads the
configuration file when it is activated and when it receives
the hangup signal.

If the cron daemon is not able to create or open the
user-specified logfile, then it creates a log of its
activities in the /var/adm/cron/log file.

5. At installation, Red Hat Fedora Linux creates a symbolic link called _____ to the appropriate cd-rom device?

It creates dev/cdrom
However on a newer system it's dev/sr0

6. An extended partition can contain many sub partitions called_______?

extended partition contain logical partition

7. A _____Bios automatically assigns the necessary
configuration information (IRQs I/O addresses, and DMAS) to devices and avoid conflicts?

BIOS Has a set of routine to initialize the Bare hardware.
If "automatically assign" means initialization then the
proposition is right. Else... The BIOS inits the system
resources and stores the values in NVRAM(CMOS) the screen
you see for configuring the SYSTEM parameter is a depict of
CMOS/NVRAM not the BIOS.

When you configure the System, the post-BIOS routines read
those and prepares the system for start-up.

8. When performing a Linux installation the____ command can be typed to start the installation without framebuffer support?

vga=xxx
where XXX is resolution mode
Ex. XXX=791 for 1024x768 resolution

9. A _____ cpu is a cpu that has a speed greater than the speed that was originally intended for the processor?

its called overclocking, generally the processor is set to
a low clock rate which can be increased to higher clock
frequencies. Example a P4 3Ghz processor could be
overclocked to 4.2 Ghz but it requires a lot of skills and
additional heat sinks to dissipate the energy. Also, it can
lead to permanent damage of processor

10. What is the scope and packages being offered after the Linux course completion?

You will concentrate on shell scripting and database like
Oracle, Sql etc., The Redhat offer RHSA, RHSS courses