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                            A bit is the smallest unit of data in a computer system.

                            Computer memory stores information and instructions that the
                            computer needs to work.

                            Primary memory is the main memory of computer that can be directly

                            accessed by the CPU.

                            Secondary memory is permanent in nature and is not directly accessed
                            by the CPU.

                            Storage devices are parts of a computer that save information like text,
                            pictures and games.

                                                             Checkpoint

                     A.  Tick ( ) the correct option.

                         1.  Which of the following is called volatile memory?

                            a.  ROM                                        b.   RAM

                            c.  Hard disk                                  d.   None of these

                         2.  Which device is permanently fixed in the CPU box?

                            a.  Hard disk                                  b.  Pen drive

                            c.  CD                                         d.   DVD

                         3.  Which storage device can hold up to 700 MB?

                            a.  Pen drive                                  b.  Memory card

                            c.  Blu-ray disc                               d.   CD

                         4.  What is half a byte called?

                            a.  Bit                                        b.  GigaByte (GB)

                            c.  KiloByte (KB)                              d.   Nibble

                                                                                      Memory and Storage Devices         17

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