ST.XAVIER’S SR.SEC SCHOOL SUBJECT – COMPUTER CLASS V GENERAL INSTRUCTION : 1. Make a single line copy for computer subject. 2. Use only blue gel pen to write questions and answers on the computer copy. 4.Leave a line after every question and answer. 5. Read the lesson at least once before writing the notes on your copy. 6.Write the objective type questions on your computer text book only.
LESSON :1 Evolution of Computers ❖ Match the following. (Page .11 ) 1. Microprocessor --- Fourth generation computers 2. Artificial intelligence --- Fifth generation computers 3. Vacuum tube -- First generation computers 4. Transistor -- Second generation computers 5. Integrated circuit -- Third generation computers.
❖ Choose the correct options. (Page .14 ) 1. Under which category of devices does the Samsung Gear series fall? ans c)Wearable 2. Which of the following technologies is used by robots? ans b) AI 3. On which technology is JARVIS based? ans b) AI 4. Which of the following is developed by Apple? ans b) iPhone X 5. Which of the following devices is used as an activity tracker? ans. d) Wearable
A. Choose the correct options. (Page .16 ) 1. In which year was the Pascaline invented? ans b) 1642 2. Under which generation of computers does ENIAC fall ? ans a) First 3.Which of the following devices displays information like a Smartphone without using hands. --- ans c) Google glasses 4. Which generation of computers relied on an assembly language? ans b) Second 5. Which of the following features was introduced by fourth - generation computers? ans d) GUI
B. Write true or false. (Page .16 ) 1. The analytical engine was invented by Charles Babbage. ---True 2. First generation computers used transistors ---- False 3. UNIVAC is a type of third generation computer ----- False 4. Virtual reality is a technology that superimposes a computer generated image on a user’s view of the real world ------True 5. A robot is an example of fourth generation computers ------False 6. First generation computers used transistors as their chief component.--- False
C. Fill in the blanks. (Page .16 ) 1. Magnetic drums was used for storage purposes in first generation computers. 2. The Analytical Engine was designed by Charles Babbage. 3. Second generation computers used transistors as chief component. 4. ENIAC is considered the first general purpose computer. 5. A robot is a example of artificial intelligence. 6. The period of third generation computers was from 1964 to 1971.
QI. Answer the following questions in short :(To be written on the copy ) 1. Who is known as the father of computing ? Ans. Charles Babbage 2.Which is the earliest calculating device? Ans. Abacus 3.Which was the first electronic digital computer? Ans. ENIAC 4Name the machine developed by Wilhelm Gottfried Leibniz. Ans. Step Reckoner 5. Write about the inventions of Charles Babbage. ANS. Abacus, Difference Engine, Analytical Engine
QII. Answer the following questions. 1 . Describe some of the early computing devices. Ans. a) Abacus --- It was one of the earliest calculating devices used to count large numbers and perform mathematical operations of addition and subtraction. b) Napier’s Bones --- John Napier a Scottish mathematician , invented a calculating device in 1614 , called Napier’s Bones ,for the multiplication of large numbers. c) Pascal’s Calculator ---Blaise Pascal was a French mathematician who invented a arithmetic machine in 1642. This calculating machine was known as Pascaline. d) Step Reckoner --- In 1674, Gottfried Wilhelm Leibniz built a calculator that could add, multiply, subtract, divide and even find square roots. He named the calculator ‘Step Reckoner’ as it used stepped drums. e )Jacquard’s Loom --- In 1801, Joseph Marie Jacquard, a French inventor, weaver, and merchant invented a power loom for weavers. It could weave fabric designs. 2. Compare first and second generation computers. Ans. First generation computers 1. First generation computers used vacuum tubes. 2. These computers were huge. 3. The instructions to computers were given using machine language. 4. UNIVAC, ENIAC, Mark 1, EDSAC and EDVAC are a few examples. Second generation computers 1. Second generation computers used transistors. 2. It is smaller, faster, more energy efficient and less expensive. 3. The instructions to computers were given using assembly language. 4.IBM 7094 series, IBM 1400 series, Honeywell 400, and CDC 164 are a few examples.
3. What were the input and output sources in third generation computers? Ans. Third generation computers used keyboards to give input and monitors to produce output.
4. What is the difference between virtual reality and augmented reality? Ans. Virtual reality 1. Virtual reality is a technology in which a scenario is generated by a computer that stimulates a real life experience.
2. Users feel as if they are actually watching that in a real life. Whereas : Augmented reality 1. Augmented reality is a technology that integrates digital information with a user’s view of the real world, thus providing us a combined view. 2. With the AR technology, a user can manipulate with the real life objects without having to touch them. 5. Briefly explain any three latest technologies in computers. Ans. Smartphone’s --- A smart phone is a mobile phone that can also function as a handheld computer. It can perform a variety of functions besides making calls. Wearable Technology --- Wearable technology or wearables are smart electronic gadgets that can be worn on the body as accessories. Smart watches, fitness trackers, smart glasses and VR headsets are some of the most popular wearables. 3D Printers --- Three-dimensional printers are used to print 3D objects. These printers use the 3D printing technology to join material and create 3D objects. These 3D models are created using a computer aided design (CAD) package on a computer. 6. What were the disadvantages of first generation computers? Ans. Disadvantages of first generation computers are: 1. They were very big in size and required a large space for installation. 2. They generated a large amount of heat, and so air conditioning was required. 3. They were not very reliable. 4. They were programmed to use only machine language. Only people who knew machine language could operate them. 5. They could solve only one problem at a time. 6. They were very expensive and non-portable. xxxxxxxx