Subject
:-ICT
2.
Storage Devices Std :- VI
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Answer
the following:
1. What is data and information? Explain with an example.
Ans:
Data is a collection of facts and figures given to the computer for processing.
Example: Names and addresses of students.The result obtained after processing
of data is called information. Example: Mark Sheet of student.
2. What
are the different types of computer memory?
Ans:
The different types of computer memory are primary memory and secondary memory.
3. What
are data storage units? Write the different types of storage units and their
relationships.
Ans:
Data storage units are used to measure computer memory.
Relationship between different units of computer memory are;
8 bits =1byte
1024 bytes = 1 Kilobyte
1024 KB =1 Megabyte
1024 MB = 1 Gigabyte
1024GB = 1 Terabyte
1024 TB = 1 Petabyte
1024 PB = 1 Exabyte
1024 EB = 1 Zettabyte
4.
What is the need of secondary storage devices? List some examples.
Ans:
Secondary storage devices are used to store data permanently. Some examples
are: CD, Pen Drive, DVD, Hard disk.
5. Why is
hard disk considered an important secondary storage device?
Ans:
Hard disk is considered an important secondary storage device because it stores
the operating system, software applications and all the files and folders.
6. What
are the different types of CDs? How are they different from each other?
Ans:
Different types of CDs are:
• CD-R (Compact Disc – Recordable) –Data can be written to this CD only once.
• CD- RW (Compact Disc – Rewritable) –Data can be rewritten to this CD after
erasing the stored data.
7.
Compare the storage capacities of a hard disk and a blu-ray disc.
Ans:
The storage capacity of a hard disk is 250 GB to 3 TB and Blu-ray disc is up to
25 GB.
8. What
advantage does a USB flash drive have over other storage devices?
The
advantages of a USB flash drive over the other devices are:
Ans: a) It is small in size and portable.
b) It is a durable device.
c) Writing and erasing speed is high.
D) It keeps the data safe and secure.
Exercises from the book
Fill in
the blanks
- RAM and ROM are the two types of primary memory.
- ROM is also known as permanent or non volatile memory.
- The memory of a computer is represented in bytes
- The storage capacity of a hard disks ranges from 250 GB to 3 TB
- Kingston Technology Corporation is a leading manufacturer of pendrives.
Write
true or false
- Secondary memory devices store data temporarily. FALSE
- A computer can understand only two digits: 0 and 1. TRUE
- A hard disk is the most important secondary storage device of a computer. TRUE
- A compact disk can store up to 25 GB of data. FALSE
- We cannot rewrite data onto a USB flash drive. FALSE
- A computer needs data to work - True.
- Ram contain programs and instructions - False
- RAM requires power to keep the data accessible - True
- The data stored in secondary memory does not get erased when the computer is shut down - True
- A bit is the memory needed to store a single letter or number - False
Complete the crossword with the help of the
clues given below.
- Processed
data. INFORMATION
- Another
name for ram. VOLATILE
- It
can hold up to 25 GB data. BLURAY
- Another
name for secondary memory. AUXILIARY
- Stores the operating system, software applications ,files and folders of a computer. HARDDISK
- The
smallest unit of a computer memory. BIT
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