Choose the appropriate answer. What devices … you use?

616 Choose the right preposition. This device is used _____ controlling the cursor.
for
at
in
from


617 Choose the right words. The mouse _______ control the cursor.
is used to
is used for
used for
used to


618 Choose the right answer. Lightpen ______ detecting light from the computer screen.
works by
works for
used for
used by


619 Answer the question. What do alphanumeric keys represent?
They represent represent letters and numbers, arranged as on a typewriter.
They appear to the right of the main keyboard and contains numeric and editing keys.
They include ‘arrow keys’ which move the insertion point.
They change the functions of other keys.


620 Answer the question. What does numeric keypad represent?
It appears to the right of the main keyboard and contains numeric and editing keys.
It represents represent letters and numbers, arranged as on a typewriter.
It includes ‘arrow keys’ which move the insertion point.
It changes the functions of other keys.


621 Answer the question. What do function keys represent?
They appear at the top of the keyboard and can be programmed to do special jobs.
They represent represent letters and numbers, arranged as on a typewriter.
They appear to the right of the main keyboard and contains numeric and editing keys.
They include ‘arrow keys’ which move the insertion point.


622 Answer the question. What does Ctrl key do?
It changes the functions of other keys.
It represents represent letters and numbers, arranged as on a typewriter.
It includes ‘arrow keys’ which move the insertion point.
It deletes the character to the left of your current position.


623 Answer the question. What does Enter key used?
It is used to select options from a menu or to start a new paragraph.
It sets the keyboard in ‘CAPITALS’ mode; it only affects letters.
It changes the functions of other keys.
It represents represent letters and numbers, arranged as on a typewriter.