Class 9 Computer Unit 1 Computer System Full Exercise
1. Write the
full forms of the following abbreviations. i. EC – Electronic Communication
ii. MHz – Megahertz
iii. GHz – Gigahertz
iv. ms – Millisecond
v. ns – Nanosecond
vi. Ps – Picosecond
vii. Fs – Femtosecond
viii. GIGO – Garbage In Garbage Out
ix. RAM – Random Access Memory
x. IPOS – Input Process Output Storage
xi. ATM – Automated Teller Machine
xii. CT Scans – Computed Tomography Scans 2. Choose the
correct answer. a.
Which fraction of a second is equivalent to one millionth of a second?
i) Milliseconds ii)
Microsecond
iii) Nanosecond
iv) picoseconds b.
Incorrect input results in incorrect output. It is referred to as ….
i) FIFO
ii) LIFO iii)
GIGO
iv) None of the above c.
How many kilobytes are in one megabyte?
i) 1030
ii) 1000 iii)
1048
iv) 1024 d.
Repeatedly working capability of computers is known as ………..
i) storage
ii) speed iii)
diligence
iv) versatility e.
What…