What is PowerShell?
PowerShell is an extendable command-line shell which is designed especially for the system administrators and power-users for managing the operating system and processors.
It is a scripting environment which is built on the .NET Framework.
It is platform-independent and open-source.
What are the features of PowerShell?
Following are the different features or characteristics of PowerShell:
- The main feature of PowerShell is that it is based on an object, not on text.
- The PowerShell commands are customizable.
- PowerShell remoting is the feature which enables the execution of cmdlets on a remote system that helps the developers for managing the set of remote computers from one single machine.
- Scripting debugging is also an essential feature of PowerShell, which is used to examine the commands, scripts, functions, and expressions at the time of PowerShell execution.
What is the Execution policy in PowerShell?
Execution policy in PowerShell is a concept which controls the conditions under which PowerShell loads the configuration files and execute scripts.
What is Try, Catch, and finally in PowerShell?
Try: It is a part of a script where we want the PowerShell to monitor the errors. If an error occurs in this block, the automatic variable $Error stores the error. And then, the PowerShell searches the Catch block to handle the error.
Catch: In a PowerShell script, it is a part which handles the errors generated by the Try block.
Finally: In a PowerShell script, it is a part which releases the resource that no longer needed by a script.
What is the difference between PowerShell and CMD?
Following are the differences between PowerShell and CMD:
| PowerShell | Command Prompt (CMD) |
|---|---|
| 1. It is a task-based command-line shell and associated scripting language which is based on the .NET framework. | 1. It is the default command-line interpreter for the Microsoft Windows Operating System. |
| 2. It can interpret both the commands of a batch and PowerShell. | 2. It can interpret only the commands of a batch. |
| 3. It controls and automates the Windows operating system and applications on a Windows server. | 3. It executes the commands which are specified on the console to debug the problem. |
| 4. The output generated by the PowerShell is not just a stream of characters (text) but a collection of objects. | 4. The output generated by the command prompt is just a stream of characters (text). |
| 5. It is both a shell and scripting environment which supports the creation of large files for managing the windows operating system. | 5. It is just a shell environment, which allows a user to do only easy and basic scripts for the execution of the batch file. |
Explain the significance of PowerShell brackets?
Braces Brackets {}: These types of brackets are used in the blocked statements.
Parenthesis Brackets (): These brackets are used for required arguments.
Square Brackets []: These types of brackets used to define the optional items.
What is the variable in PowerShell?
A PowerShell variable is a unit of memory which is used to store the data. You can easily store all the types of values in the variable of PowerShell. In the variables, PowerShell contains integers, strings, and objects.
Enlist the two ways of extending PowerShell?
- PSSnapins
- Modules
Enlist the two methods by which input of pipeline works?
- ByValue
- ByPropertyName
What is the Automatic variable in PowerShell and enlist the common automatic variables?
There are so many predefined variables in PowerShell, which are known as the automatic variables. These variables mainly store the information about the PowerShell, and created and maintained by the PowerShell. Any user can't change or update the value of these variables.
Following are some common automatic variables:
- $$
- $?
- $^
- $_
- $args
- $Error
- $foreach
- $Home
- $input
- $null
- $PSHome
- $PWD
