CHAPTER-1(NUMBER SYSTEM)-CLASS 7

CLASS –VII

CHAPTER-1(NUMBER SYSTEM)

Formative Assessment

A.     Fill in the blanks:

1.      2

2.      Decimal Number

3.      8

4.      10

5.      Binary

6.      Hexadecimal

7.      0

B.      State True or False:

1.      T

2.      F

3.      F

4.      F

5.      F

C.      Application based Questions:

                                            i.            Multiply each octal number with 8 having the power 0 for unitary position,starting from the extreme right digit.

                                          ii.            Increase the power one by one ,keeping the base fix. Sum up all products to get decimal number.

2. He can solve this by borrow method as (10-1=1)

Summative Assessment

A.     Multiple choice questions:

1.      Aryabhat

2.      Digital Computer

3.      Binary

4.      1

5.      2

B.       Answer the following questions:

1.      A system for representing (that is expressing or writing) numbers of a certain type is called number system.The types are:

                                            i.            Decimal number system

                                          ii.            Binary number system

                                        iii.            Octal number system

                                         iv.            Hexadecimal number system

2.     The rules are:

                                i.            Divide the given decimal number with the base 2.

                              ii.            Write down the remainder and divide the quotient again by 2.

                            iii.            Repaet the step 2 till the quotient is zero.

3.  The rules for multiplication of two numbers a and b is:

A	B	A*B=C
0	0	0*0=0
0	1	0*1=0
1	0	1*0=0
1	1	1*1=1

4.               The octal number system consists of 8 digits i.e 0 to 7 with base 8. in Octal, a binary number is divided up into groups of only 3 bits, with each group or set of bits having a distinct value of between 000 (0) and 111 ( 4+2+1 = 7 ).

Representation of an Octal Number

MSB	Octal Number							LSB
88	87	86	85	84	83	82	81	80
16M	2M	262k	32k	4k	512	64	8	1

Chapter 1(Networking Concepts)-Class 8

CLASS –VIII

CHAPTER-1(NETWORKING CONCEPTS)

Formative Assessment

A.   Fill in the blanks:

1.     Communication

2.     Data & Resources

3.     Single Point

4.     Nodes

5.     Wireless Networking

6.     MAN

B.    State True or False:

1.     F

2.     T

3.     T

4.     T

5.     F

6.     F

C.     Application based Questions:

1.     Local Area Netwok(LAN)

2.     Peer to peer Network

3.     Wireless Network Cards

4.     Bluetooth

Summative Assessment

A.    Multiple choice questions:

1.     Ehternet Network Card

2.     Bluetooth

3.     Nodes

4.     Network

5.     WAP

B.     Answer the following questions:

1.     A computer network can be defined as a group of computers and other peripheral devices that are linked together for sharing data and hardware resources. For example if one of the computers in a network has a printer attached to it then all the computers in that network can access the printer.

2.     Uses of networking are:

                                                        i.            Efficient use of storage media

                                                      ii.            Preserving Information

                                                    iii.            Reduction in Hardware Cost

                                                   iv.            Efficiency

                                                     v.            Redundancy

                                                   vi.            Quickest Document Delivery

3.     Difference between LAN and WAN is:

Stands For	Local Area Network	Wide Area Network
Covers	Local areas only (e.g., homes, offices, schools)	Large geographic areas (e.g., cities, states, nations)
Definition	LAN (Local Area Network) is a computer network covering a small geographic area, like a home, office, school, or group of buildings.	WAN (Wide Area Network) is a computer network that covers a broad area (e.g., any network whose communications links cross metropolitan, regional, or national boundaries over a long distance).
Speed	High speed (1000 mbps)	Less speed (150 mbps)
Data transfer rates	LANs have a high data transfer rate.	WANs have a lower data transfer rate compared to LANs.
Example	The network in an office building can be a LAN	The Internet is a good example of a WAN

4.      Network Security means protecting data and resources from access by unauthorized persons. There are two levels of network security:

                                                        i.            Login Security:You are given a unique login name and password.

                                                     ii.            Rights Security:Based on user name read only or read write access is given.

5.      In this network  there is a main computer called server that provides services to clients and controls access to  all the resources.

Chapter-1(computer languages)-class 6

CLASS –VI

CHAPTER-1(COMPUTER LANGUAGES)

Formative Assessment

A.   Fill in the blanks:

1.    Program

2.    Four

3.    Machine

4.    Spacewar

5.    Machine

6.    Assembly

7.    Lisp

B.   State True or False:

1.    T

2.    F

3.    T

4.    F

5.    T

6.    T

7.    T

C.    Application based Questions:

1.    High level language

2.    High Level Language

Summative Assessment

A.    Multiple choice questions:

1.    Source Program

2.    Interpreter

3.    Object Program

4.    John W. Tukey

B.     Answer the following questions:

1.    This is the only language that computer understands. It is expressed in the form of 0 and 1.It is very difficult to understand this language.It is machine dependent.It is considered as Low Level language(LLL).

2.    Assembly language uses ‘mnemonics codes’ or symbols in place of 0 and 1. Since a computer understands only the machine language so,translators programs called Assemblers are used to convert the assembly language program into machine language. It is also a LLL(Low Level Language).

3.    The features of high level language are:

                   i.            Simple and user friendly

                ii.            Machine Independent language

              iii.            Easy to learn and use

4.    Difference between compiler and interpreter is:

No	Compiler	Interpreter
1	Compiler Takes Entire program as input	Interpreter Takes Single instruction as input .
2	Intermediate Object Code is Generated	No Intermediate Object Code is Generated
3	Conditional Control Statements are Executes faster	Conditional Control Statements are Executes slower
4	Program need not be compiled every time	Every time higher level program is converted into lower level program
5	Errors are displayed after entire program is checked	Errors are displayed for every instruction interpreted (if any)
6	Example : C Compiler	Example : BASIC

Computer System (Class 9)

CLASS-IX

CHAPTER-COMPUTER SYSTEM

Q1: Fill in the blanks:

a)      One of the main job of computer is to process _________into ___________.

b)      A person who communicates with a computer or uses the information it generates, is called ___________.

c)      The electric, electronic and mechanical equipment that makes up a computer is called ___________.

d)      A collection of related instructions ogranised for a common  purpose is referred to as ____________.

e)      Computers in ___________ is used for making books, magazines,newspapers,music,film and video.

f)       A ___________ contains keys for press to enter data into instructions.

g)      A ___________allows you to speak into the computer.

h)      ___________devices hold data, instructions and information for future use.

i)        A ___________ provides much greater storage capacity than a USB flash drive.

j)        The motherboard  is the main ___________of the system unit.

k)      A ___________processor is a chip that contains two separate processor cores.

Q2. State true or false.

a)      A computer is an electronic machine that works automatically by own.

b)      Data is a collection of unorganized facts,like words,numbers,images and sound.

c)      The processing speed of computer is very slow.

d)      A keyboard contains keys you press to enter data into the computer.

e)      Storage is not an efficient feature of computer.

f)       A dual core processor is a chip that contains two separate processor cores.

g)      The motherboard is the main circuit board of a micro computer.

Q3. Answer the following questions.

a)      Define computers.

b)      Mention two areas where computer is used.

c)      Name any two input devices.

d)      Name any two output devices.

e)      Which part of computer is called the brain of computer?

f)       Name the two components of CPU.

g)      Define the following terms:

                                                        I.            Information

                                                      II.            Data

                                                    III.            Output Devices

                                                    IV.            Motherboard