Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Set the string.StringBuilder str = new StringBuilder("Tom Hanks");Now, use the replace() method to replace whitespace with String. Empty. This will eventually remove the whitespace.str.Replace(" ", String.Empty);Let us see the complete code −Example Live Demousing System; using System.Text; class Demo { static void Main() { StringBuilder str = new StringBuilder("Tom Hanks"); Console.WriteLine(str.ToString()); str.Replace(" ", String.Empty); Console.WriteLine(str.ToString()); Console.ReadLine(); } }OutputTom Hanks TomHanks
Declare an array and add elements.int[] val = { 5, 8, 15, 25, 40, 55, 80, 100 };Now, use the Queryable Last() method to get the last element.val.AsQueryable().Last();Let us see the complete code.Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Demo { static void Main() { int[] val = { 5, 8, 15, 25, 40, 55, 80, 100 }; int last_num = val.AsQueryable().Last(); Console.WriteLine("Last element: "+last_num); } }OutputLast element: 100
Many operating systems are not based on one model of the operating system. They may contain multiple operating systems that have different approaches to performance, security, usability needs etc. This is known as a hybrid operating system.The Hybrid operating system may allow one operating system to fulfil one set of requirements and the other operating system to fulfil the rest. For example, one of the operating systems may provide user interface, applications monitoring etc. while the other operating system may be a high-performance operating system that does not provide the same services as the first operating system.Features of Hybrid Operating ... Read More
A command interpreter allows the user to interact with a program using commands in the form of text lines. It was frequently used until the 1970’s. However, in modern times many command interpreters are replaced by graphical user interfaces and menu-driven interfaces.Purpose of Command InterpretersCommand interpreters serve many purposes and are more useful than graphical user interfaces in some cases. Details about these cases are given as follows −Command interpreters have a large range of commands and queries available for different operations. Also, it is much faster to type than to click as is done using graphical user interfaces..There are ... Read More
The standard Java API and virtual machine are mainly designed for desktop as well as server systems. They are not that compatible with mobile devices. Because of this, Google has created a different API and virtual machine for mobile devices. This is known as the Dalvik virtual machine.The Dalvik virtual machine is a key component of the Android runtime and is a part of JVM (Java Virtual Machine) developed specially for Android. The Dalvik virtual machine uses features that are quite important in Java such as memory management, multi-threading etc. The programs in Java are first converted into JVM and ... Read More
The Linux kernel modules can be loaded or removed from the kernel as required. This can be done without recompiling the kernel or rebooting the system and it enhances the functionality of the system.Without the kernel modules, the operating system would have to include all the systems that provide all anticipated functionalities in the base kernel. This would lead to wastage of memory as most of those systems would not be used often. Also, the users would need to rebuild and reboot the base kernel every time they would require a new functionality.The kernel modules have a .ko extension and ... Read More
A bootstrap program is the first code that is executed when the computer system is started. The entire operating system depends on the bootstrap program to work correctly as it loads the operating system.A figure that demonstrates the use of the bootstrap program is as follows −In the above image, the bootstrap program is a part of ROM which is the non-volatile memory. The operating system is loaded into the RAM by the bootstrap program after the start of the computer system. Then the operating system starts the device drivers.Bootstrapping ProcessThe bootstrapping process does not require any outside input to ... Read More
Loadable kernel modules in an operating system is an object file that contains code to extend the running kernel, which is also known as the base kernel. The loadable kernel modules are used to add support for file systems, hardware, system calls etc.A figure that shows the loadable modules of the operating system is as follows −Advantage of Loadable Kernel ModulesAn operating system would have to include all the systems that provided all anticipated functionalities in the base kernel if there were no loadable modules. This would lead to wastage of memory as most of those systems would not be ... Read More
The BIOS, operating system and hardware components of a computer system should all be working correctly for it to boot. If any of these elements fail, it leads to a failed boot sequence.System Boot ProcessThe following diagram demonstrates the steps involved in a system boot process −Here are the steps −The CPU initializes itself after the power in the computer is first turned on. This is done by triggering a series of clock ticks that are generated by the system clock.After this, the CPU looks for the system’s ROM BIOS to obtain the first instruction in the start-up program. This ... Read More
Debugging is the process of finding the problems in a computer system and solving them. There are many different ways in which operating systems perform debugging. Some of these are −Log FilesThe log files record all the events that occur in an operating system. This is done by writing all the messages into a log file. There are different types of log files. Some of these are given as follows −Event LogsThese stores the records of all the events that occur in the execution of a system. This is done so that the activities of all the events can be ... Read More