Computer Short Questions 9th Class
Chapter: 1
Introduction to Computers
Q.1. What is Computer? Ans. Compu Computer ter is an elec electr tron onic ic devic device e that that proc proces esse ses s data data and and conv conver erts ts it into into information and gives us results accordingly. Q.2. What is an ABACUS? Ans. Abacus, a wooden frame of wires and beads, was made by Chinese about 2000 years ago for simple addition. Q.3. What is Napier’s Bones? Ans. John Napier created a device using rods to perform arithmetic calculations that is called Napier’s Bones. Q.4. What do you know about Pascaline Calculator? Ans. Pasca Pascall inve invent nted ed a mach machin ine e that that had had a sy syst stem em of gears gears.. Numbe Numbers rs could could be entered and cumulative sums obtained by cranking a handle. Q.5. Who made the Difference Engine? Ans. Charles Babbage designed an automatic mechanical calculating machine that he called a difference engine. Q.6. What is Analytical Engine? Ans. Charles Charles Babbag Babbage e constr construct ucted ed a genera generall purpose purpose,, fully fully progra program-co m-contr ntrolle olled, d, automatic mechanical digital computer that is called analytical engine. Q.7. What is the use use of Punched Cards and who made it? Ans. In 1890, Herman Hollerith developed the first electro-mechanical punched card tabulator that could read information that had been punched into cards. Q.8. Who made ENIAC? Ans. In 1942, P.Eckert, John W. Mauchly decided to build a high-speed electronic computer that is known as ENIAC. Q.9. What is the modern modern idea of Stored-program Stored-program and and who proposed it? Ans. John Von Neumann gave the modern idea of stored-program and according to him “Data and program can be stored in the same memory. Thus the machine can itself alter either its program or internal data”. Q.10. Write the Technologies and Computers of Computer Generations. Ans. Generation Technology Computers G-1 Vacuum Tubes ENIAC & UNIVAC-I G-2 Transistors IBM7094,1400 Series G-3 Integrated Circuits UNIVAC 9000,IBM 370 G-4 Microprocessor Apple Macintosh, IBM PC G-5 Artificial Intelligence Q.11. Name the first Digital Computer? Ans. In early 1940s, Aiken built the first general-purpose digital computer called MarkI. Q.12. What is a Terminal? Asif Rasheed BS(HONS) Physics
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Computer Short Questions 9th Class
Ans. A terminal is a monitor and a keyboard connected to a mainframe computer to build a network. Q.13. What is meant by a Virtual Classroom? Ans. In a virtual classroom, the teacher deliver lecture at its own workplace while the students, connected to a network, may listen to him at their homes. They may put questions and answers are sent to them via email. Q.14. Define Universal Production Code. Ans. The sequence of lines that is read by a “ Bar Code Reader ”. ”. The price of the item is stored in this code and these are automatically added to the bill. Q.15. Define Computer Simulation. Ans. Computer Simulation is the use of computer to represent the dynamic responses of system by the change in behaviors of another system modeled after it. Q.16. What is a Computer Program? Ans. The set of instructions to solve any kind of problem is called computer program. Q.17. Define Low Level Languages. Ans. These languages are quite close to the processor but not even understandable for human being e.g. machine language, assembly language. Q.18. Define High Level Languages. Ans. These languages are quite close the human languages like English language and far from machine language e.g. FORTRAN, BASIC, C/C++, VB. Q.19. What is an Assembler? Ans. Assembler is a program that translates an assembly language program into machine code. Q.20. What is a Compiler? Ans. Compiler is a program that translates a program written in high-level language into machine code. It reads the whole program before executing. ABBREVIATIONS ⇒ Electronical Numerical Integrator and Calculator ENIAC ⇒ UNIVAC Universal Automatic Computer ⇒ IBM International Business Machine ⇒ Integrated Circuit IC ⇒ LSIC Large Scale Integrated Circuit ⇒ VLSIC Very Large Scale Integrated Circuit ⇒ Artificial Intelligence AI ⇒ Personal Computer PC ⇒ LCD Liquid Crystal Display ⇒ Automatic Transaction Machines ATMs ⇒ Universal Production Code UPC ⇒ Opcode Operation Code FORTRAN ⇒ Formula Translation ⇒ Beginners All-purpose Symbolic Instruction Code BASIC ⇒ COBOL Common Business Oriented Language ⇒ LISP List Processing) Language ⇒ Visual Basic VB Asif Rasheed BS(HONS) Physics # 0344 78 46 394
Computer Short Questions 9th Class
PDA
Chapter: 2
⇒
Personal Data Assistants
Computer Components
Q.1. What is a Program? Ans. The sequence of instructions given to computer for manipulating data is known as a program. Q.2. Define Electronic Data Processing. Ans. The The proc proces ess s of perf perform orming ing arit arithm hmet etic ic and and logic logic oper operat atio ions ns with with the the help help of computer is known as electronic data processing. Q.3. What is meant by Computer Hardware? Ans. The physical parts of the computer that you can touch and feel are known as computer hardware. Q.4. What is meant by Computer Software? Ans. The organized collections of computer data and instructions are called computer software. Q.5. What is Input Unit of computer? Ans. Inpu Inputt unit unit cons consis ists ts of inpu inputt devic devices es with with which which we send send data data to the the cent centra rall processing unit e.g. keyboard, mouse, scanner etc. Q.6. What is Output Unit of computer? Ans. Output unit consists of output devices with which we get results e.g. monitor, printer etc. Q.7. What is System Unit of computer? Ans. Syst System em unit unit cons consis ists ts of moth mother erboa board, rd, micr micropr oproc oces essor sor and and the the peri periphe phera rals ls attached to it. Q.8. Define System Software. Ans. The The prog progra rams ms that that are are resp respon onsi sible ble for for cont contro rolli lling ng and and mana managi ging ng the the actu actual al operations of the computer hardware are called system software e.g. operating system. Q.9. Define Application Software. Ans. The programs that are used to accomplish tasks specified by the user are called application software e.g. word processing, spreadsheet etc. Q.10. Define the working of CPU. Ans. CPU is called the brain of the computer and the primary work of CPU is to convert data from input, process the data and giving results accordingly. Q.11. Define the working of ALU. Ans. ALU is the combination of Arithmetic and Logic unit and it performs all the mathematical and logical operations. Q.12. Define the working of CU. Ans. CU consis consists ts of circuit circuitry ry that that generat generates es signals signals to direct direct the entire comput computer er system to execute the programs and controls controls the flow of information information through the processor. Asif Rasheed BS(HONS) Physics
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Computer Short Questions 9th Class
Q.13. What is meant by BUS? Ans. BUS is the common path that is used to send and receive data and commands to and from CPU and memory and all I/O devices. Q.14. What is Data Bus in Computer System? Ans. It is an elec electr tric ical al path path that that conn connec ects ts the the cent centra rall proc proces essi sing ng unit unit,, memo memory ry,, input/output devices and secondary storage devices. Q.15. What is Address Bus in the Computer System? Ans. It carries address information and connects only central processing unit and memory. Q.16. What is Control Bus in the Computer System? Ans. It carries control information from the control unit to the other units. Q.17. Define Define Computer Computer Storage. Storage. Ans. Computer Storage is used to store programs and data. Q.18. Define Main Memory (RAM). Ans. It is a type of memory that stores data temporarily and data can be stored and retrieved much faster than the secondary storage. Q.19. Define Secondary Memory (ROM). Ans. It is a type of memory that stores data permanently and data can be stored and retrieved but not be re-written. Q.20. What is meant by PORT? Ans. A socket that enables an external device such as printer device to be attached to the computer. Q.21. Define Serial Port. Ans. Serial port allows s a serial hardware device to communicate with the computer by transmitting one bit of information at a time such as mouse, modems and keyboard. Q.22. Define Parallel Port. Ans. Parallel port lets an external parallel device communication with the computer by transmitting eight bits of data at a time and eight times faster than a serial port. Q.23. Define USB Port. Ans. USB is a Plug and Play hardware interface for peripherals such as the keyboard, mouse, joystick etc. ABBREVIATIONS
EDP CPU ALU CU I/O Devices RAM ROM USB COM Ports
⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒ ⇒
Electronic Data Processing Central Processing Unit Arithmetic and Logic Unit Control Unit Input and Output Devices Random Access Memory Read Only Memory Universal Serial Bus Communication Ports
Asif Rasheed BS(HONS) Physics
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Computer Short Questions 9th Class
P& P
Chapter: 3
⇒
Plug and Play
Input / output Devices
Q.1. Q.1. Defi Define ne Inp Input ut Dev Devic ices es.. Ans. The devices that are used to enter data and instructions into the computer are called input devices e.g. keyboard, mouse, microphone etc. Q.2. What is a QWERTY Keyboard? Ans. Keyboa Keyboard rd is the the stan standar dard d inpu inputt devi device ce used used to ente enterr text textua uall data data into into the the computer. Q.3. What are Alphanumeric Keys on Keyboard? Ans. The keys that are used to input alphabet (A-Z) and numbers (0-9) are called alphanumeric keys. Q.4. Q.4. What What are are Num Numeri eric c Keys Keys on Key Keybo board ard? ? Ans. The keys that are used to input numbers numbers are called numeric keys. Q.5. What are Function Keys on Keyboard? Ans. The keys consist of (F 1 to F12) are called function keys and these keys provide shortcuts for doing routine tasks on a computer. Q.6. What are Cursor Control Keys on Keyboard? Ans. These four keys are used for moving the cursor from its current position position to right, left, up or down. down. Q.7. What is a Mouse? Ans. A mouse is an input device that rolls around on a flat surface and controls the pointer on a display screen. Q.8. What is a Trackball? Ans. A trackball is a stationary pointing device that works like a mouse and contains a ball exposed on its surface. It is mainly used in portable computers. Q.9. What is a Joystick? Ans. Joystick is an input device used for games, computer aided designs or simulations. Q.10. What is a Scanner? Ans. A scanner is an input device that reads the image present on piece of paper and tran transf sfers ers the the info inform rmat ation ion into into a comp comput uter er wher where e a prog progra ram m can can stor store e and and interpret it. Q.11. What is a Microphone? Ans. A microphone is an input device used to digitally record audio data such as the human voice. Q.12. What do you know about Voice Recognition System? Ans. Voice recognition system use a microphone as an input device and converts a person’s speech into digital data by comparing the electrical patterns produced by the speaker’s voice with a set of prerecorded patterns stored in the computer. Q.13. What is meant by Discrete Speech? Asif Rasheed BS(HONS) Physics
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Computer Short Questions 9th Class
Ans. Voice recognition applications require each word to be separated by a distinct pause to determine where on e word begins and the next stops. This style of dictation is called discrete speech
Q.14. What is a Light Pen? Ans. Light pen is a light-sensitive input device shaped like a pen. It is used to draw on the computer screen or to make menu selection. Q.15. What is is a Digital Digital Camera? Ans. Digit Digital al came camera ra is a devi device ce that that stor stores es imag images es digit digital ally ly in its its memo memory ry rath rather er recording them on film. Q.16. What is a Disk Drive? Ans. A disk drive is a machine that reads data from and writes onto a disk. Q.17. Define Output Devices. Ans. The devices that are used to receive data and information from the computer are called output devices e.g. monitor, printer, speaker etc. Q.18. What is a Softcopy? Ans. An elec electr tron onic ic vers versio ion n of a docu docume ment nt stor stored ed on a stor storag age e devi device ce is call called ed softcopy. Q.19. What is Hardcopy? Ans. The printed version of an electronic document is called hardcopy. Q.20. What is a Monitor? Ans. It is an output device that is used to get result in the form of image and text in different colors. Q.21. What is meant by resolution? Ans. The number of pixels on the screen expressed as a matrix is called resolution. Q.22. What is a CRT Monitor? Ans. A phosphors coated screen with three electron guns on its back is called CRT Monitor. Q.23. What is a LCD Monitor? Ans. LCD Monitor is commonly used in portable computer and it creates images with a special kind of liquid crystal that normally transparent but becomes opaque when charged with electricity. Q.24. Define Video Controller? Ans. Video controller is an intermediary device between the CPU and the monitor and determines the resolution of the monitor e.g. VGA and SVGA. Q.25. What is a Printer? Ans. Printer is an output device that produces hardcopy on the paper. Q.26. What are Impact Printers? Ans. Impact printers produce images by striking an inked ribbon with a hammer or a set of pins, pressing ink from the ribbon onto a piece of paper. Q.27. What are Non-impact Printers? Ans. Non-impact printers produce images on paper without striking the page in any Asif Rasheed BS(HONS) Physics
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Computer Short Questions 9th Class
way. Q.28. What is a Plotter? Ans. Ans. Plotters are used as output device and print a large drawing or image(s). Q.29. What is meant by CDR? Ans. A CDR is a drive that allows for recording information to a CDR disk. Q.30. What is meant by CDRW? Ans. CDRW is a drive that can use both CDR and CDRW discs. These are the discs on which old data can be erased and new data can be written. ABBREVIATIONS
OCR
⇒
Optical Character Recognition
HDD
⇒
High Density Disk/Hard Disk Drive
FDD
⇒
Floppy Disk Drive
CRT
⇒
Cathode Ray Tube
LCD
⇒
Liquid Crystal Display
VGA
⇒
Video Graphic Array
SVGA
⇒
Super Video Graphic Array
LPM
⇒
Line Per Minute
CAE
⇒
Computer Aided Education
CAD
⇒
Computer Aided Design
CAM
⇒
Computer Aided Manufacturing
CD
⇒
Compact Disk
CDR
⇒
Compact Disk Recorder
CDRW
⇒
Compact Disk Writer and Re-writer.
Asif Rasheed BS(HONS) Physics
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