Which letter-cluster will replace the question mark (?)

Which file system is commonly used in Linux-based operating systems?

__________was the first browser to display images inline with text instead of displaying images in a separate window.

Which of the following is the slowest Internet connection?

Which out of following is not a file extension of a video file?

What is the function of the ALU in the CPU?

C, a programming language originally developed for developing

 ............. Is the functional key to display save-as box. 

To undo the last work, we have to use which of the following Windows shortcut key?

What does 'ctrl +esc' do?

What is the main function of the ALU?