Question:

___________

1) Write a command to delete and item permanently.

Answer:

___________

• Select the item which we want to delete.
• Press the Delete key on your keyboard.

Question:

___________

Write the command to open Home tab's menu in Microsoft Word 2007.

Answer:

___________

Click on the button present on the bottom left corner.

Question:

___________

Write the command to open View tab's menu in Microsoft Word 2007.

Answer:

___________

At the top right of the Word window, click the Ribbon Display Options button, and then click Show Tabs and Commands.

Question:

___________

What are the modes of operations in networking. Explain them in details.

Answer:

___________

Simplex

It is the data transmission mode in which the data can flow only in one direction.

Half-Duplex

These devices can only transmit in one direction at one time.

Full-Duplex

This transmission is simultaneously bi-directional.

Synchronous

This happens at the same time.

Asynchronous

This doesn't happen at the same.

Serial

Serial data transmission sends data bits one after another over a single channel.

Parallel

Parallel data transmission sends multiple data bits at the same time over multiple channels.

Question:

____________

What is meant by log out? Explain in detail.

Answer:

____________

Loging out means to end access to a computer system or a website.

Logging out informs the computer or website that the current user wishes to end the login session.

Log out is also known as log off, sign off or sign out.

Answer:

1) Press Shift+Delete.

2) Alt+H

3) Alt+W

4) The many modes of operation in networking.

Two of them are -

i) Batch mode -

In this mode, programs and data are simultaneously loaded into a computer's memory and are then processed. While the program is being executed, user intervention is not entertained. If the program produces some errors, then the processing needs to be abandoned and requires to be started from the initial phase. So before processing the data in this mode, program must be tested and data must be input correctly.

ii) Real time system -

Real Time Systems are those systems that perform the tasks within a required or specified time. Time is very important factor in such systems. These systems may be grouped into the following two categories:

i) Real time online system

ii) Real time offline system.

5) Loging out means to end access to a computer system or a website. Logging out informs the computer or website that the current user wishes to end the login session.

Log out is also known as log off, sign off or sign out.

The period between the login and the logout is the duration of the login session, which is the period that a user can perform his/her actions. Logging out can be accomplished in two ways: by using the log-out option provided by an application or by the system, or by shutting down the computer or closing an application without explicitly logging out. Some websites automatically log out a user if the login session has become inactive for long periods. There are certain applications that provide auto logout and multi-application logouts.

Logging out helps prevent other users from accessing the system without verifying their credentials. It also helps protect the current user's access or prevent unauthorized actions on the current login session and is thus an important part of security. Logging out ensures that user access and user credentials are safe after the login session.

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