Top 250 Operating Systems Interview Questions and Answers

The cut command in Linux is used to extract sections from each line of input.

• Used to cut out specific sections of text from a file or input stream

• Can specify the delimiter used to separate fields

• Options include -c for characters, -f for fields, and -...read more

BSOD stands for Blue Screen of Death. It is an error screen displayed on Windows operating systems when a fatal system error occurs.

• BSOD is a critical error that causes the computer to crash and display a blue screen with error codes.

• It is usually ca...read more

BSOD stands for Blue Screen of Death. It is an error screen displayed on Windows operating systems when a critical system error occurs.

• BSOD is a stop error screen that appears when the Windows operating system encounters a fatal system error.

• It is us...read more

Modern and Classic folders are two different types of folders in UiPath Orchestrator.

• Modern folders are designed for multi-tenancy and allow for more granular control over permissions and access.

• Classic folders are the traditional folders in Orchestr...read more

Threads are lightweight processes that enable concurrent execution within a program, improving efficiency and responsiveness.

• Threads share the same memory space, allowing for faster communication compared to separate processes.

• They are used to perfor...read more

A process is an instance of a program while a thread is a subset of a process.

• A process has its own memory space while threads share memory space

• Processes are heavyweight while threads are lightweight

• Processes communicate through inter-process commun...read more

OS functions include managing hardware resources, providing user interface, and running applications.

• Managing hardware resources such as CPU, memory, and storage

• Providing user interface for interaction with the computer

• Running applications and managi...read more

To kill a process in RHEL 7.2, use the 'kill' command followed by the process ID.

• Identify the process ID using 'ps' command

• Use 'kill' command followed by the process ID to terminate the process

• Use 'kill -9' command to force kill the process if it doe...read more

BSOD stands for Blue Screen of Death. It is an error screen displayed on Windows operating systems.

• BSOD is a critical system error that causes the computer to crash and display a blue screen with error codes.

• It can be caused by hardware or software i...read more

A blue screen error can be caused by various factors such as hardware issues, driver conflicts, and software errors.

• Hardware issues like faulty RAM or overheating can cause blue screen errors.

• Driver conflicts occur when incompatible or outdated drive...read more

Windows and UNIX have several technical differences.

• Windows has a graphical user interface (GUI) while UNIX is primarily command-line based.

• Windows uses the NTFS file system while UNIX typically uses the ext4 file system.

• Windows supports a wide range...read more

A user can be created in a single line command using the 'useradd' command in Linux.

• Use the 'useradd' command followed by the username to create a user.

• Specify additional options like home directory, shell, etc. if required.

• Example: useradd john -m -...read more

The command to check profile consistency in Linux is 'saproot.sh'.

• The 'saproot.sh' command checks the consistency of SAP profiles in Linux.

• It can be run as the 'root' user or with 'sudo'.

• The output of the command shows any inconsistencies in the prof...read more

LVM (Logical Volume Manager) is a disk management tool used in Linux systems to manage storage devices and create logical volumes.

• LVM allows for easy management of storage by abstracting physical storage devices into logical volumes.

• It provides featu...read more

Deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource.

• Deadlock occurs when two or more processes are stuck in a circular waiting state.

• It happens when processes compet...read more

The limit of drive refers to the maximum distance or duration one can drive without taking a break.

• The limit of drive is typically determined by regulations and guidelines set by transportation authorities.

• In many countries, there are legal limits on...read more

The boot.properties file is a configuration file used by middleware applications to store username and password credentials.

• The boot.properties file is typically found in the domain directory of a middleware application.

• It is used to store the userna...read more

The disk show commands are used to display information about disks in a data center.

• Use the 'disk show' command followed by specific options to retrieve disk information

• Common options include 'disk show -v' for verbose output and 'disk show -a' for a...read more

List of 15 Linux commands with their functions

• ls - list directory contents

• pwd - print working directory

• cd - change directory

• mkdir - make a new directory

• rm - remove files or directories

• cp - copy files and directories

• mv - move or rename files and direc...read more

Threading is a technique to execute multiple tasks concurrently. Multithreading can be implemented using threads.

• Threading allows multiple tasks to run concurrently, improving performance and responsiveness.

• Threads are lightweight processes that shar...read more

Micro kernel is a small kernel that only provides essential services while macro kernel provides all services in the kernel space.

• Micro kernel provides only essential services while macro kernel provides all services in the kernel space

• Micro kernel i...read more

To delete CTL and ITL files from a phone, access the phone's settings, navigate to the security or device administration section, and delete the files.

• Access the phone's settings

• Navigate to the security or device administration section

• Locate the CTL ...read more

Process is an instance of a program while thread is a subset of a process that can run concurrently with other threads.

• A process is a program in execution

• A process can have multiple threads

• Threads share the same memory space as the process

• Threads can...read more

Windows Server 2008 and Windows Server 2012 have several major differences.

• Windows Server 2012 introduced a new user interface called Metro UI, while Windows Server 2008 uses the traditional Windows interface.

• Windows Server 2012 has improved virtuali...read more

Yes, I know how to create and manage Users and Groups.

• To create a user, use the appropriate command or tool provided by the operating system or directory service.

• To manage users, you can modify their properties, reset passwords, enable or disable acc...read more

Binder is a mechanism for inter-process communication in Android.

• Binder allows different processes to communicate with each other.

• It is used for implementing Android's IPC (Inter-Process Communication) system.

• Binder uses a client-server model where t...read more

Deleting last 30 days logs in Tomcat using shell script

• Use find command to locate files older than 30 days

• Use xargs command to pass the file names to rm command

• Use crontab to schedule the script to run periodically