If any body has the pdf of class 7 cyber beans computer book so pls share
Answers
Answer:
Fill in the Blanks:
1. The base of Binary number system is 2 .
2. The base of decimal number system is 10.
3. Octal Number system consists of 8 digits.
4. In Binary addition 1 +1 e1ual to 10.
5. Binary number system is understood by the computer system.
6. Hexadecimal uses 16 symbols to represent numbers.
7. In Binary subtraction , 1-1 equals 0 .
State True or False:-
1. The decimal number system consists of 10 digits i.e. 0 to 9. (True)
2. The method to perform division of two binary numbers is not same as that of decimal numbers. (False)
3. 1 multiplied by 0 equals to 0. (True)
4. Charles Babbage introduced the concept of 0 (Zero). (False)
5. The numbers used in Octal number system are 1 to 7. (False)
Multiple Choice Question:
1. …………. Introduced the concept of 0 (Zero).
a. Ada Lovelace b. Aryabhat c. Bill Gates [B]
2. A ………………. Converts the decimal format in to its binary equivalent.
a. Digital Computer b. Cell Phone c. Abacus [A]
3. A computer understand only ………. Code.
a. English b. French c. Binary [C]
4. In Binary multiplication 1×1 equals to ……………………….
a. 0 b. 1 c. 2 [B]
5. To convert Decimal number in to Binary number , divide the Number by ………………………….
a. 2 b. 8 c. 10 [A]
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Application Based Question:
Q.1. Ratika’s computer teacher asked her to convert the octal number to Decimal number. Suggest her the method which she should apply in converting the Octal number.
Answer:- Divided By 10.
Q.2. The teacher has given an assignment to Saurabh on Binary subtraction. Subtraction. Is confused how to subtract 1 from 0. Help him in solving the problem.
Answer: with Borrow.
Answer the following:
Q.1. explain Number system and its commonly used types.
Answer:- A set of values used to represent different quantities is known as Number system. The digital compute represents all kind of data and information in Binary number. The commonly used number system is Decimal number system .
Q.2. What are the rules to convert a decimal number in to Binary Number?
Answer
Divide the given decimal number with the base 2.
Write down the remainder and divide the quotient again by 2.
Repeat the step 2 till the quotient is zero.
Q.3. Write the rules to multiply two Binary Numbers.
Answer:- The rules for performing multiplication using binary number is same as that of decimal number . The given table illustrates the multiplication of two binary digits:
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
Q.4. Briefly explains the Octal Number system.
Answer:- The Octal number system consists of 8 digit i.e.,0 to 7 with the base 8. The procedure of octal to decimal conversion is similar to binary to decimal conversion. The only difference is the change of base.
Lesson 2.
Working in Windows 7
Fill in the blanks:
1. Windows has simplified the task of Managing Data in computer
2. Content view display each file and folder on a separate row along with details , like data modified, sixe, author, etc.
3. To replace double click setting of a mouse with single click , select the Folder Option in Control Panel.
4. With numeric keypad in mouse mode, the Hibernation key is used for diagonally left upward movement.
5. Hibernation is a state in which a computer shuts down to save power but first saves everything in the memory on hard disk.
State True or False
1. Libraries is a kind of folder in Windows 7. (True)
2. Date and Time once stored in a computer cannot be changed. (False)
3. The Sticky keys feature automatically deactivates itself if two key are pressed together. False)
4. There are three panes in Windows Explorer. (False)
5. Small Icon view is used to view the detailed information about files and folders. (False)
Multiple Choice Questions:
1. ……………. Folder in Windows 7 allows you to organize your files in one place.
a. Library b. Documents c. Computer [A]
2. …………………… is a power saving state that allows a computer to quickly resume full power operation when you start working again.
a. Sleep b. Busy c. Hibernate [A]
3. ……………….. is a system folder using which we can make changes in the appearance and current setting of Windows.
a. Accessories b. Control Panel c. Power Options [B]
4. ……………… view displays files and folders as medium size icons along with the basic information. Such as type and size.
a. Small Icons View b. Control Panel c. Power Options [B]
Application Based Question:
Ritu has to complete her assignment and submit it on next day. While typing the keyboard of a computer system has stopped working. Suggest her the alternate to complete the assignment.
Answer:- On Screen Keyboard.
Meenakshi has stored various files in her laptop. She wants to view all the files with detailed information including name, type six and date modified. Suggest there the view format which would fulfill her requirement.
Answer:- Details Icon.