NOTES: QUICK WAY COMPUTER FOR CLASS 4TH 2015
NOTES: QUICK WAY COMPUTER FOR CLASS 4TH 2015
CHAPTER: 01 HISTORY OF COMPUTATION P: 5-11
Q No.1
- Fill the blank spaces with correct words.
I.———————————-was the very first device to count the things.
- Napier’s Bones was a set of———————————————-rods with number ——————————————marked on them.
- ————————————————————is believed to be the First Calculator of the world.
- Pascaline was invented in————————————— by——————————————————-
- Difference Engine was invented in——————————————-by———————————
- Charles Babbage invented another machine in ——————————– called ——————————————————-
vii.—————————————machine was invented in————————————————Herman Hollerith.
viii.——————————————is known as the First Programmer.
- MARK I was invented in———————————————by——————————————
x.——————————————is considered as the First Computer of the world.
| Answers: 1.Abacus 2.twenty two 1to9 3.Pascaline 4.1642 Blase e Pascal 5.1822 Charles Babbage 6.1833-34 analytical engine 7.tabulating 1890 8. Ada Augusta 9.1942, Pofesser Houard Aiken 10. Mark- 1 |
Q No.2 For each statement two options are given, Tick the correct one.
- Abacus was invented in:
- a) China b)America
- Napier’s Bones was designed in:
a)1668 b)1617
iii. A French mathematician Blase Pascal invented a machine called:
- a) Pascaline b) Difference Engine
- The Father of Computer is:
a)Charles Babbage b) G.W Liebnitz
- Analytical Engine was invented in:
a)1833 b) 1895
- Difference Engine was invented by:
- a) Pasc1ine b)Charles Babbage
vii. Tabulating Machine also called:
a)Punch Card Machine b) Mark I
viii. ENIAC was invented in: \
a)1943 b)1955
- The First Computer of the world was:
a)ENICA b) Mark I
- Pentium Computers belong to:
a)Intel Family b)IBM Family
| Answers: 1.a 2.b 3.a 4.a 5.a 6.a 7.a 8.a 9.b 10.b |
| Q No.3-iWho was Pascal? |
| ANS:Blasé Pascal was French mathematician. He invented mechanical calculating device ‘ Pascaline’ in 1642 AD. |
| Q No.3-iiWrite a short note on Mechanical Calculator. |
| ANS:Mechanical Calculator:It is the first Calculator of the world.It was invented in 1642 AD by Blasé Pascal.
It was capable of doing addition and subtraction. It had a number of wheels with teeth. Each wheel consisted of 0-9. |
| Q No.3-iiiWrite a short note on the services of Charles Babbage? |
| ANS:Services of Charles Babbage:1. He is called “The father of computer.2. He designed a machine called ‘ Difference Engine’ in 1822.
3. He made ‘Analytical Engine’ in 1834. |
| Q No.3-ivWho was Howard Akin and what did he develop? |
| ANS:Howard Akin: He was a professor of Harvard University in USA.He made MARK-1 which is considered as ‘The First Computer of the world.’ |
| Q No.3-vWrite a short note on Microcomputers. |
| ANS:1. First Microcomputer was introduced in 1975. It was without keyboard and Monitor.2. An American company ‘Apple’ introduced a microcomputer with keyboard and Monitor in 1977.3. These the most popular microcomputer is ‘intel’ (Pentium IV) etc. |
CHAPTER: 02 INSIDE THE SYSTEM UNIT P:13-19
Q NO. 1 FILL THE BLANK SPACES WITH CORRECT WORDS.
i—————-is called the brain of the computer.
- ALU stands for —————-.
lll. RAM stands for——————– .
- There are —————–main types of computer memory
inside the system unit.
- ROM stands for ——————-
- There are —————–types of computer case namely
vii. —————–case and——————— case.
viii. External memory devices are also called—————–
- A single CD can store————————– MB of data.
- DVD has a storage capacity starting at——————-
- I/O Card is also called——————- .
Answers: (i-microprocessor)(ii-arithmetic& logic unit)(iii-random access memory )(iv-two)(v-read only memory)(vi-two)(vii-desktop, tower)(viii-secondary storage devices)(ix- more than 700)(x-4.7 GB)(xi- expansion cards)
Q No.2
| Q No.2-IWrite a short note on the importance of a System Unit. |
| ANS:System Unit is a box-shaped part of a computer. It consists of CPU, Memory, Main Board, VGA Card, Sound Card etc. It performs a vital role to get output from input. |
| Q No.2-iiWrite the names of three main parts of CPU, how does each of them support CPU? |
| ANS:CPU (Central Processing Unit) has three major parts;(l)CU(2)ALU
(3)MU |
| Q No.2-iiiWrite a note of the importance of Power Supply in a System Unit. |
| ANS:Power Supply:It changes the electricity from wall outlet into electricity, which is used by the computer. |
| Q No.2-ivWrite a short note on the RAM. |
| ANS:RAM: It stands for Random Access Memory. It is temporary memory of computer. All the programs are loaded into RAM. When computer is turned off, the data on RAM is deleted. |
| Q No.2-vWhy Hard Disk is useful than a Floppy Disk? |
| ANS:Hard Disk has a large storage capacity. We can read and write the data on the Hard Disk as many times we require.Floppy Disk has smaller storage capacity. So Hard Disk is more useful than Floppy Disk. |
| Q No.2-viWrite a note on the importance of CD ROM in a computer. |
| ANS:CD-ROM (Compact Disk, Read Only Memory):It can read and data and programs stored in disks. It can store a lot of information. |
| Q No.2-viiWhat is the use of Tape Drive in a computer? |
| ANS:Tape Drive:A tape drive is used to read and write data and information onto a tape cartridge.It can be inside the system unit or connected to the system unit by a cable. |
| Q No.2-viiiWhy the I/O Ports and Cards are used in a computer? |
| ANS:I/O Ports : These are used to connect input and output devices to the system unit like Keyboard, Mouse, Monitor and Printer etc.Cards:
An I/O card or expansion card is a circuit board, which can be fixed in the computer for adding a new feature. An expansion slot is a socket on the main board where an expansion card can be plugged in. |
| Q No.2-ixWrite the name of any five devices, which can be attached to the comp through I/O ports. |
| ANS:There are many devices which are attached to computer through I/O ports; such as1.Keyboard,2. Mouse,
3.Monitor 4. Printer 5.scanner |
3-TICK “X” THE WRONG STATEMENT:
i.CU stands for Central Unit.
ii.MU stands for Memory Unit.
iii.Main Board is made by fibreglass.
- A 3.5 inches Floppy Disk can store 1.2 MB of data.
- A 5.25 inches Floppy Disk can store 1.44MB of data.
- CD- ROM stands for Compact Disk Read Only Memory.
vii. DVD stands for Digital Video pisk.
viii. 1/0 Port stands for Input 1 Output Port.
- Every work performed by computer is in the notice of Memory Unit.
x. All arithmetic & logical operations are performed in the Control Unit. - VGA Card is used to display information on the screen.
xii. With the help of Modem Card two persons can communicate with each other.
Ans: (i-x)(ii-√)(iii-√)(iv-x)(v-x)(vi-√)(vii-√)(viii-√)(ix-)(x-x)(xi-√)(xii-√ )
CH: 03 CLASSIFICATIONS OF COMPUTERS
P: 21-27
1-FILL IN THE BLANK SPACES WITH THE HELP OF THE DEFINITIONS OF THE COMPUTERS:
1-desktop computer
2-Main frame computers
3-Super computers
| Q No.2-iWrite a short note on Digital Computers? |
| ANS:Digital computers:Digital computers work on the basis of two states, that is, ” 0″ and” 1 ” representing” OFF” and” ON ” respectively.In fact, digital computers use electronic circuits, which can be distinguished by two values.
Examples: digital watches, digital scales and calculators etc. |
| Q No.2-iiWhat do you know about Hybrid Computers? |
| ANS:Hybrid Computers:These computers have useful features of both the digital and analog computers.For example, in lCU
Measurements collected by hybrid computers are converted into digits and then come into digital components, which indicate the patient’s vital symptoms. |
| Q No.2-iiiWho are the users of Main Frames Computer? |
| ANS:Main Frames Computer are normally used in;- banks,- educational institutions, -financial institutions, -large organizations like Airlines and Atomic Research Centres, where rapid access to centrally kept files is very necessary. |
| Q No.2-ivWhy Microcomputers are so common? |
| ANS:Microcomputers are also called PC’s (Personal Computers). Now-a-days, Micro computers are the most common and the smallest type of computers, being used in business, at home and in educational institutions.Laptop and Notebook computers also, fall in this category. Because of their size and qualities micro computers are so common. |
| Q No.2-vWrite a note on the Super Computer. |
| ANS:Super Computer: There are number of processors in Super Computers that can process data in Pico seconds (10 -12 Sec) rather than Nanoseconds (10 -9 sec):Some organizations use these computers, which can work at an extraordinarily high speed and their results are 100% accurate. |
| Q No.2-viWhat do you know about Mini Frame Computers. |
| ANS:Mini Frame Computers: Mini computers (or Minis), were firstly introduced in 1960’s. Now-a-days mini computers are general-purpose computers.They provide access 10 to 200 users at a time.
Some popular mini computer manufacturing companies are DEC, NCR, Hewlett Packard, Data General, Wang and IBM. |
3- FILL THE BLANK SPACEES WITH CORRECT WORDS:
I————————–computers have useful features of both the Digital and Analog Computers.
- Main Frame computer was firstly introduced for business purposes in early—————————-
iii.Mini Frame Computers were firstly introduced in ————————–
- The speed and storage capacity of Mini Computer is less than —————————————Computers.
- Microcomputer is also called a ———————————————-
- Microcomputer firstly introduced in late ————————————
vii. More than ————————user can share a Mini Frame Computer.
V111. ——————————————Computer can execute five million instructions per second.
- Nanoseconds are represented by —————————————-
- Pico seconds are represented by —————————————-
Xl. Popular Mini Computer is ————————————————-
xii. Microcomputers can be interconnected with————————–
Ans: (i- hyrid )(ii-1950s )(iii-1960s )(iv-Main Frame )(v-PCs ) (vi-1970s)(vii-10-200 )(viii-Super )(ix-10-9 sec ) (x-10-12 sec )(xi-IBM AS/400 )(xii-LAN)
4- TICK( X) THE WRONG STATEMENT.
- “ 0 ” represents ON stage while “ 1 ” represents OFF stage. X
ii, Speedometer is an example of Analog Computers. √
iii. A thermometer is a Digital Device.x
- A calculator is an example of Digital Computer. “√
- Mini Frame Computers are slow than the Main Frame Computers.x
- Micro Computers were firstly introduced in late 1970.√
vii. Laptop and Notebook Computers are the examples of Super Computer. x
viii. Super Computer manufacturing companies are Cray and Fujitsu.√
CHAPTER: 04
CLASSIFICATION OF COMPUTERS PAGE:38-39
- FILL THE BLOCKS WITH THEIR RESPECTIVE LABELS.
Answers: Icons, pointer
Desktop,
Start button, status bar, date & time
2-GIVE SHORT ANSS OF THE FOLLOWING Questions:
| Q No.2-iWhat is SOFTWARE? |
| ANS:SOFTWARE:SOFTWARE is a group of instruction that lays down the rules that how computer will work with hardware. |
| Q No.2-iiWhat a role of an OPERATING SYSTEM is in the computer? |
| ANS:OPERATING SYSTEM:An OPERATING SYSTEM is the main set of programs. This set manages a computer system.It is a gateway to:
1-Application programs 2-Data and Other resources of computer system. |
| Q No.2-iiiExplain the COMMAND PROMPET? |
| ANS: COMMAND PROMPET:DOS command prompt is the place on the computer screen where we can type any DOS command prompt.It looks like;
C:>/ |
| Q No.2-ivWrite the purpose of the following commands in Dos?DIR – CLS – MD – CD DIR – COPY – DATE – EXIT |
| ANS:1- DIR:It displays the contents of the directory on the screen.2- CLS :
This command is used to clear the screen of the monitor. 3- MD: It is used to make new directory or sub-directory. 4- CD DIR: This command is used to change directory from one to another. 5- COPY: It is used to copy one or more files from one location to another. 6- DATE: It is used to view or change the current system date. 7- EXIT: It is used to exit Dos program and return to previous windows program. |
| Q No.2-vExplain the Multimedia Support Operating System? |
| ANS: Multimedia Support Operating System:1- With it, we can play high quality digital movies etc on computer.2- With its help, we can watch TV.
3- We can dramatically change the look and sound of our destop theme. |
| Q No.2-viExplain the following terms in two lines.DESKTOP – MOUSE POINTER – WALLPAPER |
| ANS:1- DESKTOP: It is the area in computer, where operations take place .2- MOUSE POINTER : An arrow type symbol moves on the screen called mouse pointer. 3- WALLPAPER: It is a picture. It has no effect on the operating system. |
3- FILL THE BLANK SPACES WITH CORRECT WORDS.
| i- ————————————-is a name given to program procedures used to function computer hardware. |
| ii- There are two types of software, one is—————————– and other —————————————————— |
| iii- ———————————is a main program that runs a computer. |
| iv- DOS stands for———————————— |
| v- An American software company ———————————–released DOS in—————————————— |
| vi- —————————————–is a command driven program. |
| vii- —————————————————-is a multi-tasking operating system. |
| viii- Word Processing Software is an——————————————– Software. |
| ANS:(i-Software) (ii-system software , Application software)(iii-system software)
(iv-Disk Operating System ) (v-Microsoft ) (vi-DOS ) (vii- Windows) (viii- Application ) |
—————-End—————
CHAPTER: 05
INTRODUCTION OF MICROSOFT OFFICE PAGE:48-49
- TICK THE RIGHT STATEMENT.
| I: We can create newsletters, business cards, flyers and other publications with text and graphics in Microsoft Excel. | |
| II:We can create and enhance drawings and photographs in Microsoft Photo Draw. | |
| III: We can create our own Web pages in Microsoft Publisher. | |
| IV: Microsoft Excel is an accounting program. | |
| V:We can send and receive E-mail in Microsoft Outlook Express. | |
| ANSS:(I- F) (II-T) (III-F) (IV-T ) (V-F) | |
- FILL THE BLANK SPACES WITH CORRECT WORDS.
| I- ————————————–is a powerful application software package. |
| II-We can Write, Edit, Format, Save and Print a letter in ———————————program. |
| III——————————————is a replacement for account’s columnar pad, pencil and calculator. |
| IV-In Microsoft ——————————–we can create and give on screen presentation for business. |
| v- In Microsoft we can manage appointments, addresses, and E-mails. |
| vi- In Microsoft —————————————-we can explore the World Wide Web (Internet). |
| vii- In Microsoft ———————————–we can store addresses, inventory records ———————————————————and other data. |
| ANSs:(I- Microsoft )(II-MS Words)(III-MS Exel)
(IV- MS PowerPoint ) (V- MS Outlook ) (VI- MS Outlook ) (VII- MS Access ) |
4: MATCH THE RIGHT SHORTCUT KEYS:
| Column-A | Column-B |
| a-Use Help | 1- Shift+F1 |
| b-Use the ” What’s This?” | 2- F1 |
| c-Create a New Document | 3- CTRL+N |
| d-Open a Different Document | 4- CTRL+S |
| e-Switch Between Open Document | 5- CTRL+F6 |
| f- Save Document | 6- CTRL+O |
| ANSS: (a- 2) (b-1) (c- 3 ) (d-6 ) (e-5 ) (f-4) | |
Computer CHAPTER: 06
MICROSOFT WINDOWS PAGE:64
1: GIVE THE ANSS:
| Q No.1-iExplain the following commands in the Start Menu?1-Shut Down 2- Find 3-Run 4-Settings5-Help 6- Programs |
| ANS:1-Shut Down:It provides access to programs, documents etc.It can performs many tasks in Windows.2- Find:
It enables you to find; a folder file or email messages 3-Run :It starts a program or opens a folder when you type an MS-DOS command. 4-Settings: It displays a list of system components for which you can change settings. 5-Help: It helps you to find how to do a task in Windows. 6- Programs: It displays a list of programs you can start. |
| Q No.1-ii Explain the following Icons in My Computer?i-3-1/2 Floppy (A:) ii-Mars1 (C:) iii-(E:) iv- Printers |
| ANS:i- 3-1/2 Floppy (A:)It starts floppy disk drive.ii- Mars1 (C:)It has contents of the drive. iii-(E:) It is icon of CD-ROM Drive.
iv-Printers:It is icon of printer and its settings. |
| Q No.1-iiiWhat is a Folder? |
| ANS: Folder: It contains files and other folders. |
| Q No.1-iv What is a File? |
| ANS: File: It is a basic unit of storage in Windows. |
| Q No.1-vExplain the Drag and Drop Method to move or copy a File or Folder? |
| ANS:To drag and drop;1- you select the items you want from your source folder,2- hold down the mouse button,
3- the mouse to the destination folder ,and 4- release the mouse button. |
| Q No.1-viWhat is Recycle Bin in Windows? |
| ANS:The files you delete are put in Recycle Bin. It is holding place for files you no longer need. |
| Q No.1-viiHow a new Folder is created? |
| ANS: to create new Folder;Move the mouse pointer on My Computer icon and double click on it. |
| Q No.1-viiiHow can we copy the Files and Folders in Floppy Drive? |
| ANS:1- Move the mouse pointer over My Computer.2- Double click on it3- Find the desired file
4- Press left mouse button. |