Linux

Question 1

What six tasks are performed by the kernel

Answer 1

1 Process scheduling
2 Memory management
3 Provision of filesystem
4 Creation and termination of proccesses
5 Access to devices
6 Networking

Question 2

What is Kernel-mode vs User-mode

Answer 2

When in user mode, CPU can only access memory marked for user space. When in Kernel mode, CPU can access memory in kernel & user space

Question 3

What are the basic file I/O methods

Answer 3

open, read, write, close

Question 4

What’s the linux directory structure

Answer 4

root, bin, sbin, etc, dev, proc, var, tmp, usr, home, boot, lib, opt, media, mnt

Question 5

What are the different types of Inter-Process Communication

Answer 5

Signals, Pipes, Sockets, File locking, Message Queues, Semaphores, Shared memory

Question 6

What is an inode

Answer 6

a data structure in a Unix-style file system that describes a file-system object such as a file or a directory

Question 7

How can you speed up accessing files

Answer 7

Disable atime modification in /etc/fstab

Question 8

How to identify, list and edit all scheduled tasks?

Answer 8

crontab -l or crontab -e

Question 9

What command can you run to check the filesystem mount points? What file holds that information?

Answer 9

df and fstab