Solved Revision (L-4, L-5) / Class 7th Computer

 

                                                                      Class – 7^th

Subject :  Computer

Class-Test Answer

( L-4 Computer Memory and It’s type, L-5 Hardware and software )

Fill in the blanks

1)  Input unit is used to enter our data in computer.

2) You can touch and see all parts of hardware .

3) The other name of CPU box is  cabinet .

4) Secondary memory is  non-volatile by nature.

5) Give two examples of each :-

(a) Input Device  : (i)  Mouse (ii) Keyboard

(b) Output  Device  : (i)  Monitor (ii) Speaker 

(c) Software    : (i) Ms-Paint (ii) Google Chrome

6) write full form of :-

(a) RAM  Random Access Memory

(b) ROM  Read Only Memory

(c) IPO  Input Process Output 

 

Revision L-6 / class 3rd computer

 Class : 3^rd

Subject : Computer

Revision (Topic : L-6 Ms Word 2010)

Fill in the blanks

1)      ______________    is popular word processing software.

2)       There are ___________tabs present on Ms Word 2010 window.

3)      Quick access toolbar is located on the left side of the ________bar.

4)      The __________option lets you save the document for future use.

5)      Shortcut to  open a saved document is  ___________

Solved Revision L-6/ class 3rd computer

 

Class : 3^rd

Subject : Computer

Revision (Topic : L-6 Ms Word 2010)

Fill in the blanks

1)      Ms-Word 2010    is popular word processing software.

2)       There are eight  tabs present on Ms Word 2010 window.

3)      Quick access toolbar is located on the left side of the title bar.

4)      The save  option lets you save the document for future use.

5)      Shortcut to  open a saved document is  Ctrl + O

L- 10 Binary Numbers / Class 8th Computer

 

Class – 8^th

Subject : Computer

L- 10 Binary Numbers

 

Book Exercise

 Draw a table of  binary system measurement 

8 bit = 1 Byte

1024bytes = 1 KB (Kilobyte)

1024KB = 1 MB (Megabyte)

1024MB = 1GB (Gigabyte)

1024 GB = 1TB ( Terabyte)

1024 TB = 1 PB ( Petabyte)

 

Write different number systems in positional systems based on how many symbols

 

Binary - 2 different symbols - 0 & 1

Octal - 8 different symbols - 0, 1, 2, 3, 4, 5, 6 and 7

Decimal - 10 different symbols - 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9

Hexadecimal - 16 different symbols - 0,1,2,3,4,5, 6, 7, 8, 9, A, B, C, D, E and F

 

A. Multiple choice questions Choose the Correct Answer.

 

1) What is a bit?

a) A single piece of data

b) A single binary digit R

c) The smallest storage unit of computer systems.

d) A single transistor used to store binary information

 

2. What is binary number?

a) A machine language (0's and 1's) R

b) A decimal number

c) a system of zeros.

d) All of these

 

3. What is a byte?

a) A byte consists of eight bits R

b) A decimal number

c)  A byte is a binary digit

d) A binary number

 

4. What does 1+1 equals in binary.

a)  Equal to 2

b) Equal to 0

c) Equal to 10 R

d) Equal to 11

 

5. The decimal number 187 is equivalent to binary  number………………

a)  (10111011)2 R

b) (11011101)2

c)  (10111101)2

d) (10111100)2

 

6. Convert the following binary number (01011)2 to decimal.

a) 11 R

b)  35

c) 15

d)  010

 

 

7. The following binary number (10011010)2 is equal to ……………. In decimal.

a) 154

b)  155

c) 153

d)  157

B. Fill in the blanks

1. The binary system consists of two digits  zero (0) and  one (1)

2. The decimal number system uses the digits from zero (0) to  nine (9) .

3. Computer numbers are zero (0) and  one (1)

4. A simple electronic switch can represent both binary  computer numbers.

5. Only electricity signals that are just two ON and  OFF .

C. Add the following:-

1)

Binary		Decimal
1 0 1 1 1		23
1 1 1 1		15
0100110		38

 

2)

Binary		Decimal
1 1 0 0 1 1		51
1 0 1 1 0		22
01001001		73

 

 

 

 

 

 

D. Subtract the following:-

1)

Binary		Decimal
1 0 1 1 0 1		45
1 0 0 0  1		17
0 1 1 1 0 0		28

 

2)

Binary		Decimal
1 1 0 0 0 1		49
1 0 0 1 1		19
0 1 1 1 1 0		30

 

 

E. Answer the following questions:-

1. Name the different number systems that a computer deals with.

Ans: There are different number systems in positional systems based on how many symbols it has. Such as;

Binary - 2 different symbols - 0 & 1

Octal - 8 different symbols - 0, 1, 2, 3, 4, 5, 6 and 7

Decimal - 10 different symbols - 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9

Hexadecimal - 16 different symbols - 0,1,2,3,4,5, 6, 7, 8, 9, A, B, C, D, E and F

 

2. What do you understand by the binary number system?

Ans: Binary numbers system: Base=2. Thus, there are 2 Numbers: 0 and 1.  A Single binary number is called a Binary digit, or Bit, Group of 8 bit is called byte.

 

3. What are the rules to perform the following?

1. Binary addition

Ans: 

 

2. Binary Subtraction

Ans: 

 

Make a poster of rules of binary addition and subtraction.

 

L-5 & L-6 Revision Test /Class 4th Computer

 Class : 4^th

Subject : Computer

Student’s Name ____________________

Revision

Topic :L- 5 Word Formatting , L-6 Know more about Tux Paint

Fill in the blanks                                                                              (10 X 1 = 10 )

1)   Home Tab contains different groups to make  ___________formatting in document.

2)   ______________________ tool is used to fill color in an object.

3)   ___________is used to set the horizontal spacing between paragraphs and lines.

4)   ________tool is used to type text on the canvas.

5)   _________________means changing the appearance of document to make it attractive.

6)   _____________allows you to paste inbuilt images.

7)   _______________________refers to the way in which the lines of a paragraph aligned.

8)   ________________  This option can find your text, word, subject and other material that you have in your document.

9)   Bill Kendrick is the lead developer and designer of _______________________.

10)   ____________________________ refers to numbers that are positioned slightly lower than the text on the line.