Q1) Fill in the blanks:
a) volatile
b) secondary
c) CD and DVD
d) spinning
e) sequential
f) two
Q2) All statements are TRUE
Q3) full forms
RPM = Revolution Per Minute
CD-ROM = Compact Disk Read Only Memory
DVD = Digital Versatile Disk
MB = Mega Byte
GB = Giga Byte
BITS = Binary Digits
CD-RW = Compact Disk Re-writable
PB = Peta Byte
EB = Exa Byte
4. Match the following
RAM-Volatile Memory
Nibble-collection of 4bits
SSD-Lack of spinning
BIT- 0 or 1
ROM-Non Volatile memory
Hard Disk-Spinning Platters
5. Technical terms
a) Secondary Storage Media
b) SSD
c) CD/DVD
d) Optical Disk
e) 1 Tera Byte (TB)
f) RAM
6. Choose best alternatives:
(a) Hard Disk
(b) Very low
(c) Secondary Memory
(d) Non-volatile Memory
(e) RAM
7. Answer the following questions in short:
(a) What is primary memory?
Ans: The memory which is used for the currently performing task is called primary memory.
(b) What is non volatile memory?
Ans: The memory which retains its contents even after electricity cut off, is called non-volatile memory.
(c) How many bits make one byte?
Ans: 8 bits
(d) Which technology is used to read and write data in optical disk?
Ans: Laser beam technology
(e) Which storage media uses sequential access technique?
Ans: Magnetic Tape
(f) Which memory is called non-volatile memory?
Ans: Memory which can retain its contents even after electricity cut off.
8. Answer the following questions:
a. What is secondary memory of computer? Give two examples of it.
Ans: A non-volatile storage medium that can store all the data and instructions even after the computer is turned off is called secondary memory. Examples : Hard Disk, CD, DVD etc.
b. What is a magnetic tape? Write its advantages and disadvantages.
Ans: Magnetic tape is a secondary storage medium which is used to store data, information for future references.
Advantages of Magnetic Tape:
- It is portable in nature.
- It is cheaper in cost.
- It is highly durable.
Disadvantages of Magnetic Tape:
- Slow data transmission rate
- It needs dust free environment.
- It is sequential in nature.
c. What is magnetic disk? List any three advantages and disadvantages of magnetic disk.
Ans: Magnetic disk is the most widely used and popular storage mediums for direct access secondary storage.
Advantages of magnetic disk:
- Suitable for both online and offline data storage
- Less chance of disk corruption
- It has higher speed than magnetic tape.
Disadvantages of a magnetic disk:
- It costs more than magnetic tapes.
- Security maintenace is difficult.
- Disk failure loss all data.
d. What is an optical disk? Give examples.
Ans: An optical disk is an secondary electronic data storage medium that can be written to and read from using a low-powered laser beam technology.
Example: CD,DVD etc.
e. What is a CD-ROM? Why is it called so?
Ans : An optical disk in which data written once and read many times (WORM) is called CD-ROM.
It is called so because in CD-ROM we can not write data.
f. What is a byte? How many bytes are there in 32 bits?
Ans: A byte is a location in computer memory consisting of eight adjacents bits.
4 bytes are there in 32 bits.
g. What is a nibble? How many nibbles are there in 8 bytes?
Ans: A collection of 4 bits is called a nibble.
8 bytes = 8*8=64 bits
4 bits= 1 nibble
64 bits = 16 nibble
h. List any two advantages and disadvantages of optical disks as a secondary storage media.
Two advantages of OPtical Disks:
- It is physically in strong form harder to break.
- More reliable than a magnetic disks.
Disadvantge of optical disk:
- Data access speed is slower than magnetic disk.
- Reading/ writing procedures are more difficult than magnetic disk.
i. Differentiate between sequential access and random access media with one example of each.
Ans:
| Sequential Access Media | Random Access Media |
|---|---|
| 1. Data access time is slow. | 1. Data access time is fast. |
| 2. eg: Magnetic Tape | 2. eg: Hard Disk, CD etc. |
End of Chapter - 5