Right Byte 1 for Class 6 (Complete Solutions)
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Chapter 01 – The Evolution of Computer

Q1:      Fill in the blanks.
           
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Vacuum Tube
Circuit
Instruction
Super Computer
Charles Babbage

Q2:      State the following statement is true or false.

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5
True
False
True
False
False

Q3:      Select the correct option from the each question.

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4
5
C
D
B
C
A

Q4:      Answer the following questions.
           
1.      What is a computer? What is the difference between data and information?
Ans:     Computer is an electronic machine which converts RAW data into meaningful
information.
Data VS Information
Data
Information
Data is simply facts and figures
When the data are processed, Organized, or presented so as to make them meaningful or useful, they are called information.

2.      Write a brief note on the different generations of computers?
Ans:     Computer can be classified into Generation.
The First Generation of computers: 1942-1955
The computers of the first generation used vacuum tubes. First generation computers were very large, made many mistakes, produce a lot of heat and were difficult to move from one place to another.
The Second Generation of computers: 1956-1964
Second generation computers used transistors. These computers were faster and smaller. They were also cheaper more reliable and produce less heat.
The Third Generation of computers: 1965-1975    
Second generation computers used integrated circuits (ICs). Computers become smaller, faster and cheaper. They used less electricity and made fewer mistakes.
Fourth Generation of computers: 1975 onwards
Fourth generation computers are based on microcomputers. They were smaller, portable, reliable and cheap. They use less electricity and produce less heat.
The Fifth Generation of computer: The Future
Fifth generation computers used artificial intelligence.
3.      List three advantages of using computers for weather forecasting instead of the manual system.
Ans:                 High Speed,     Accurate,         Reliable.
4.      List five different places where computers are extensively used.
Ans:                 Banks,              Factories,        Homes,            Education,       Supermarkets.
5.      Beside each of the following, write the data that is being measured or counted. State whether the device is analog or digital.
Ans:
Device
Data
Type of device
A Weather Vane
Analog data
Analog device
A mercury thermometer
Analog data
Analog Device
A calculator
Digital Data
Digital Device

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Chapter No 2 – Input Devices

Q1:      Fill in the blanks.
           
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104
OMR
Barcode Reader
Touch Pad
Cordless

Q2:      State weather the following statement is true or false.

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4
5
False
True
True
False
True

Q3:      Select the correct option for each question.

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4
5
a
d
C
b
D

Q4:      Answer the following questions.
           
1.      Describe the different types of keys on a keyboard?
Ans:     A keyboard has normally 104 keys.
Alphabetic keys are used to enter alphabetic data.
A numeric keypad is used to enter numeric data.
Special keys give instructions to the computer.
A numeric Keypad is used to enter numeric data.
Special keys give instructions to the computer.

2.      Name a Place where each of the following input devices might be used:
A. Touch screen.              B. Barcode Reader.                C. Card Reader
D. Joystick.                      E. RFID Reader.                       F. Finger Print Reader.
            Ans:    
A
B
C
D
E
F
ATM Machines
Super Markets
Banks, ATM Machines
Gaming Zone
Entrance Gate
Offices

3.      Which of these is a pointing device?
A.      Light Pen.                   B. Card Reader.                      C. Sensor.
Ans:     A light pen is a pointing device.

4.      Some students are physically challenged or have learning disabilities. Can you name two input devices that might help these students enter information into a computer?
Ans:     Braille keyboards and voice recognition systems can help students who are physically challenged to provide information to a computer.
5.      Which method of input (OMR, OCR, MICR, and Barcode Reader) is most likely to be used for each of the following? Why?
a.      Reading Data from a Lottery tickets.
b.      Scanning a type document into a word processor.
c.       Reading Data from banks cheques.
Ans:
A
B
C
OMR
OCR
MICR

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Chapter 03 – OUTPUT DEVICES

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Character
Telephone
Plotter
Monitor
Pixels

Q2:      State weather the following statement is true or false.

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5
True
True
False
False
True

Q3:      Select the correct option for each question.

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4
5
A
B
C
D
B

Q4:      Answer the following questions.

1.      A microcomputer is advertised as having the following
·         32 GHz Processor.
·         512 RAM
·         80GB Hard drive
·         12-inch Monitor
·         Ink-jet Printer
What output devices are mentioned in the advertisement?      
      Ans:           A monitor and a Printer are mentioned in this advertisement.

2.      Explain the advantages of LCD Monitor over CRT monitor?
Ans:           LCD monitors are flat while CRT monitors are curved.
                  LCD Monitors are more advance, smaller and thinner than CRT Monitor.
                  LCD Monitors consume less energy and can work on batteries.

3.      What are pixels? Explain screen resolution.
Ans:           Pixels are picture elements. A computer screen can be divided into numerous small dots called pixels. These pixels make up an image on the screen.



4.      What is a fax machine? How does it work?
Ans:           A fax machine is a device that combines input and output devices. We can use it to send and receive messages over telephone lines. A fax/modem board connects the computer with telephone lines. The user inserts a document into the fax machine and dials the number of the recipient. The fax machine scans the document and sends a copy of it over telephone lines to another fax machine at the receiving end. The receiving fax machine prints the copy or displays it on a monitor.

5.      Why dot-matrix printers are not used nowadays?
Ans:           Dot-matrix printers are not used nowadays because they are slow, noisy, and produce low-quality output.

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 Chapter 04 – Processing and storage

Q1:      Fill in the blanks.
           
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Random Access Memory
Processing
Calculation
Storing
Permanently

Q2:      State weather the following statement is true or false.

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5
True
True
True
False
False

Q3:      Select the correct option for each question.

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A
D
C
B
C

Q4:      Answer the following questions.

1.      Define Processing. What is the function of the central processing unit?
Ans:           Conversion of data into information by a computer is called processing. Central Processing Unit (CPU) is the brain of computer its function is to analyze data, store data and control peripheral devices.

2.      Name and briefly describe the components of the CPU?
Ans:           CPU Consist of three parts.
                  Arithmetic Logic Unit (ALU),               Control Unit (CU),             Memory Unit (MU)
Arithmetic Logic Unit: ALU is responsible for performing calculations, making comparisons and processing data into information.
Control Unit: CU controls the operations of all the different parts of a computer.
Memory Unit: MU stores data and instructions.

3.      What is an SD memory card? Why is it called a solid-state storage device?
Ans:           An SD memory card is an optical secondary storage device that stores data in gigabytes. It is smaller, lighter, and easier to carry around than other storage devices. An SD memory card is called a solid-state storage device because it does not have any moving parts.

4.      What is the difference between primary and secondary storage?
Ans:           Primary Memory:
                              It is also called main memory or temporary memory.
                              It stores data and instructions that help the computer to work properly.
                              RAM and ROM are the examples of Primary Memory.
                  Secondary Memory:
                              It is also called back-up storage or permanent storage.
                              It stores data and instruction permanently.
                              Hard Drive is an example of secondary storage.

5.      Draw a table and differentiate between RAM and ROM.
Ans:
RAM
ROM
1.      RAM stands for random-access memory
2.      RAM is temporary memory.
3.      Data stored on RAM can be changed. It is also called volatile memory.
1.      ROM stands for read-only memory.
2.      ROM is permanent memory.
3.      Data stored on ROM can be read but cannot be changed. It is also called nonvolatile memory.

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Chapter 05 – OPERATING SYSTEM AND USER INTERFACE

Class Activity 01:                     SHORT DEFINITIONS

Program:                    Program is a set of instructions that tells the computer what to do.
Programming:            Giving Instructions to a computer is called Programming.
Software:                    Software is a set of programs that makes the computer a useful system.
System Software:      System Software consist of programs that help a computer perform routine tasks such as starting-up, shutting down and saving files.
Operating System:     Operating System consists of programs that help a computer perform routine tasks such as starting-up, shutting down and saving files.
Types of O/S:                         Operating Systems are Microsoft Windows, MS-DOS and OS/2.
Booting Up:                The process of starting up a computer is called booting up
BIOS:                           BIOS stands for BASIC INPUT OUTPUT SYSTEM, the Computer follow the instructions held on ROM chip known as BIOS.
Multitasking:              When two or more than two programs need to share the processor, memory and peripheral devices
Application Software: Application Software consists of programs that allow a computer to do special task.

BOOK EXERCISE
Q1:      Fill in the blanks.
           
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Multitasking
Files
Windows
System Software
Application

Q2:      State weather the following statement is true or false.

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False
True
False
True
True

Q3:      Select the correct option for each question.

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4
5
D
A
C
B
D

Q4:      Answer the following questions.

1.      What is software? What are the two main types of software?
Ans:           Software is a set of instruction given to a computer to perform a specific task. There are two type of software’s:                  System Software,        Application Software.
2.      What is the purpose of an operating system?
Ans:           The purpose of an operating system is to make sure that the computer is running properly and performing routine tasks.
3.      What is the difference between integrated software and application software?
Ans:           Application software is software designed to do a specific job. Integrated software combines all the major types of application software and brings them together in one application.

4.      What is a user interface?
Ans:           A user interface is the way in which a user gives commands or instructions to the computer and the way in which the computer displays information back to the user.

5.      Explain two problems with using a command line interface?
Ans:           Users have to learn the syntax for each instruction. Also, a command line interface is not very attractive or interesting to use.
Q 5:     Write paragraphs to answer the following questions.

1. Describe how GUI is more user-friendly than CLI.

Ans:           GUI is more user-friendly than CLI because, it uses an interactive interface.
a)      In GUI, the user can use the mouse to control the pointer and to select objects.
b)      The user can also use the keyboard to type commands.
However, in a CLI, the user can only use the keyboard. In a GUI, the user can view applications and data in windows, which is not possible in a CLI.

2. Think about the functions of an operating system. Why is it stored on the hard disk?

Ans:           The operating system is stored on the hard disk so that the instructions can be accessed whenever they are needed. The hard disk is also well-protected which prevents the data stored on it from getting damaged.
 3. Draw the directory tree for five files stored on your computer.

Ans:



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 Chapter 06 – AN INTRODUCTION TO WINDOWS

Q1:      Fill in the blanks.
           
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Desktop
Icon
Computer
Title
Double-Click

Q2:      State weather the following statement is true or false.

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True
False
True
True
True

Q3:      Select the correct option for each question.

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B
A
D
D
C

Q4:      Answer the following questions.

1. What are the three ways of opening a window?
Ans:           There are three ways of opening a window:
·         By double-clicking on the icon if it is present on the desktop
·         By selecting the file or program from the Start Menu
·         By typing the name of the file or program by using the Run feature.

       2. What is the difference between an active window and an inactive window?
Ans:           The window that appears on top of other open windows is called the active window.
Other windows beneath the active window are called inactive windows.
The Title Bar of an active window is coloured, while the inactive windows have a grey Title Bar.

3. What are scroll bars?
Ans:           Scroll bars enable the user to move from top to bottom or left to right on a window.

4 Is moving a file the same as copying a file?
Ans:           Moving a file is different from copying a file. When we move a file, we remove it from one location and place it in another. When we copy a file, the file remains in its original location, but a copy of it is placed in a different location.
 5. What are shortcuts? How are they created?
Ans:           Shortcuts are placed on the desktop so that applications, files, or folders stored in other locations can be accessed from the desktop. They are created by right-clicking on the file after selecting it in the original location. Then we click on Create shortcut in the menu. This creates the shortcut on the desktop.

Q 5:     Write paragraphs to answer the following questions.

1. Explain how you would open a file not present on the desktop.

Ans:           A file not present on the desktop can be accessed from its folder in Computer or Documents. If the location of the file is not known it can be accessed by typing part of its name in the Search feature of the Start Menu. The file can also be accessed through a shortcut if one has been created on the desktop.

2. Explain how the Windows interface makes multitasking easier.

Ans:           Windows makes multitasking easier because each application, folder, and file opens in a separate window. In this way, the user can open different files in separate windows and work on them at the same time.

                    For Example, if the user is downloading something from the Internet, he can work on a Word document while the downloading takes place.