The file extensions .wav, .mp3, and .ogg are used for:

Which condition guarantees that a doubly linked list with head and tail nodes is empty?

a. head==NULL b. tail==NULL c. head==tail d. head->next==tail->prev e. none of the above

Which of the following is NOT a container section function?

A. It determines the width of the page layout. B. It can be used to apply a background color. C. It determines the height of the page layout. D. It can be used to center the layout horizontally.