CBSE Questions for Class 8 General Knowledge India: Science And Technology Quiz 4 - MCQExams.com

Consider the following statements
Erasable programmable read only memory is a non-volatile memory that retains its data when its power supply is switched off
EPROM can be erased by exposing it to the strong ultraviolet light
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements
Flash memory is a volatile computer storage chip
Flash memory can be electrically erased and reprogrammed
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following computers is the worlds first commercial computer?
  • Ferranti Mark-I
  • Mark-I Star
  • UNIVAC-I
  • IBM-704
Consider the following statements
Optical disc drive uses electromagnetic waves in the far UV-rays region as part of the process of reading or writing data to or from optical discs
Slot-loading drives have the disadvantage over the tray-loading mechanism
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
The technique in which the donor cow can be made to produce more number of eggs in a cycle by a gradual treatment of hormones. What is the technique known?
  • Super ovulation
  • Rescue technique
  • Multiple ovulation and embryo transfer
  • Both (a) and (b)
Which one of the following characteristics of the FeRAM is not correct as compared with flash memory?
  • It uses a ferroelectric layer instead of a dielectric layer to achieve non-volatility
  • It has a capacity to use low power consumption
  • It has more storage densities and low cost
  • It has faster write performance and a much greater maximum number of write-erase cycles
Which one of the following does not belong to the group of other three devices?
  • Light pen
  • Track ball
  • Speaker
  • Graphic tablet
Which of the following statements is true?
  • Virtual memory is the space on the hard drive where the OS begins to store data when it starts operation
  • Accessing data from RAM is slower than accessing data from virtual memory
  • If a computer is memory bound, adding more RAM will not solve the problem
  • None of the above
The cryopsrevation is the most important technique, which is used for cloning and transfer, were the genes are conserved in the one of the following agent?
  • Cold water at $$0^0 C $$ temperature
  • Cold water at $$1^0 C $$ temperature
  • Ice cubes
  • Liquid nitrogen -$$196^0 C $$ temperature
What is termed as the capability of operating system to enable two or more than two programs to execute simultaneously in a single computer system using single processor?
  • Multiprocessing
  • Multiprogramming
  • Multi-execution
  • Multitasking
Which one of the following errors in the program of the computer causes wrong results?
  • Byte
  • Attributes
  • Bug
  • Input problem
Consider the following statements about the MRAM (Magnetoresistive Random- Access Memory)
It is a non-volatile random-access memory
It stores the data or information as electric charges or current flows
It is formed from two ferromagnetic plates, each of which can hold a magnetic field separated by a thin insulating layer
Which of the statements given above is/are correct?
  • 1,2 and 3
  • 1 and 3
  • 2 and 3
  • Only 2
Which process checks to ensure the components of the computer are operating and connected properly?
  • Editing
  • Processing
  • Booting
  • Bugging
Consider the following statements:
Java, the high-level programming language makes debugging easier for the systems.
Memory corruption is frequently observed in the system having C or assembly programming languages.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which of the following is a storage device that uses rigid, permanently installed magnetic disks to store data or information?
  • Floppy diskette
  • Optical disk
  • Permanent disk
  • Hard disk
What is the purpose of the Webcam?
  • To act as an output device
  • To act as an input device
  • To assist CPU to start OS
  • To assist the debugging program
Which one of the following pairs is involved in the development of Unix Operating System?
  • Ken Thompson and Dennis Ritchie
  • Richard Stallman and Mariq Stallman
  • Andrew S. Tanenbaum and Linus Torvalds
  • Dennis Ritchie and Linus Torvalds
Consider the following statements:
GNU is a free and open source computer operating system.
GNU is based on Unix-operating system.
Richard Stallman initiated development of GNU operating system.
Which of the statements given above is/are correct?
  • 1,2 and 3
  • 1 and 3
  • 2 and 3
  • Only 2
Consider the following statements:
Linux is a computer operating system developed under the free and open source software development and distribution model.
Android mobile operating system is built on the Linux Kernel.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following memories is not non-volatile computer memory?
  • PRAM
  • SRAM
  • Flash memory
  • Bubble memory
Which one of the following computer Operating Systems is the most commonly used in the Top-500 supercomputers of the world?
  • Unix OS
  • Linux OS
  • Lisa OS
  • Mac OS
What is the Z-RAM (Zero capacitor Random Access Memory) of the computer memory?
  • It is a RAM without capacitor, not as in the DRAM
  • It is RAM with capacitor which is located in the transistor but not as a separate as in DRAM
  • It is RAM without capacitor but the RAM is function as a Magnetoresistive RAM
  • None of the above
Which one of the following applications uses the UNIX as an Operating System?
  • Internet servers
  • Work stations
  • Mobile devices
  • All of these
Consider the following statements:
Unix is a multitasking, multi-user computer operating system.
The Unix operating system is now entirely coded in C-language.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Who is the principal author of the Linux Kernel, a free and open source computer operating system? 
  • Dennis RitchieL
  • Macintosh
  • Douglas Mcllroy
  • L Torvalds
Consider the following characteristics about the conventional Dynamic Random Access Memory
It stores each bit of data in a separate capacitor within an integrated circuit
Capacitors of DRAM leak charges so the information/data eventually fades
It is a volatile memory
Which of the statements given above is/are correct?
  • 1,2 and 3
  • 1 and 3
  • 2 and 3
  • Only 2
Consider the following statements:
Joystick is found application in the Unmanned Aerial Vehicles (UAVs) and submersible Remotely Operated Vehicles (ROVs).
Joysticks are used in many industrial and manufacturing applications such as cranes, assembly lines, mining trucks, and excavators.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Consider the following statements:
In computer graphic, GUI allows users to interact with electronic devices using images.
GUIs are used in MP3 players, portable media players or gaming devices.
Which of the statements given above is/are correct?
  • Only 1
  • Only2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following is used to sense the movement of the stick of Joystick?
  • Photocell
  • Potentiometers
  • Shielded cable
  • Digitizer
Which one of the following applications is commonly used to prepare a presentation or slide show?
  • Photoshop
  • PowerPoint
  • Internet explorer
  • Outlook express
What is the CAM in computer graphics?
  • Use of a computer to assist in all operations of a manufacturing plant
  • Use of a computer to assist in the capturing image and uploading in the social networks
  • Use of a computer to assist camcord to improve the Image quality
  • None of the statements a, b and c given above is correct description of CAM
The semen dilution is necessary for which of the following said reasons?
  • Diluter provides nutrients as a source of energy to the sperms
  • Diluters protect semen against harmful effects of rapid cooling
  • Diluters inhibit the bacterial growth in the semen
  • All of the above are correct
In the technique of artificial insemination, the semen is mixed  with semen diluters. Following are some of diluters given. Which are correct from them?
  • Egg yolk citrate
  • Milk glycerol diluter
  • Egg yolk phosphate
  • All of the above
Which one of the following branches of the computer graphics deals with creation of 2D and 3D pictures from the mathematical representation of the objects?
  • Cognitive graphics
  • Image processing graphics
  • Generative graphics
  • None of the above
What is the Rasterisation in the computer graphics?
  • Conversion of geometrical primitives such as points, lines, curves, and shapes to the mathematical expressions.
  • Conversion of an image described in the pixel format to a vector graphic format for the video display output.
  • Conversion of an image described in a vector graphic format to pixels for the output presented on a video display.
  • None of the statements a, b and given above is correct description of Rasterisation.
Consider the following statements:
CADD is the use of computer systems to assist in the creation, modification, analysis, or optimization of a design.
CADD is used to create photosimulations for the preparation of Environmental Impact Reports.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
What is the function of Window manager of the Graphic applications?
  • To control the appearance of 2D and 3D-pictures of the computer-aided design and draft
  • To control the placement and appearance of Windows within a windowing system in a graphical user interface
  • To control the placement and appearance of the cognitive features in the 2D and 3D formats
  • None of the above
What is Haptic technology?
  • It is a minicomputer technology that can be used in small appliances like watch, set-up boxes etc.
  • It is a tactile feedback technology which takes the sense of touch by applying forces, vibrations, or motions to the user.
  • It is an emerging technology to merge the supercomputer with mainframe computer technologies.
  • None of the above
Which one of the following is the most common picking device of the graphic applications?
  • Graphic tablet
  • Joystick
  • Mouse
  • Light pen
Consider the following statements:
Generative design is generated by a set of algorithm by using a computer program.
Generative design explores various designs in the fields of Art, Architecture, Communication and Products.
Which of the statements given above is/are correct? 
  • Both 1 and 2
  • Neither 1 nor 2
  • Only 1
  • Only 2
How does the light pen, a picker input device of graphic applications work?
  • A light pen works by producing IR-rays that causes a sudden small change in brightness of a point on the screen
  • A light pen works by sensing the sudden small change in brightness of a point on the screen when the UV-rays produced by the pen refresh that spot
  • A light pen works by sensing the sudden small change in brightness of a point on the screen when the electron gun refreshes that spot
  • None of the above
Which one of the following persons introduced the desktop metaphor?
  • Alan Kay
  • Allan Donald
  • Howard Rich
  • Henri Becquerel
Which one of the following is correct about the WIMP for human-computer interaction, which is later replaced by GUI?
  • WIMP is the new protocol for the development of free software and it stands for World Interaction Membership Project.
  • WIMP is the user interface mechanism and it stands for windows, icons, menus, pointer.
  • WIMP is the new protocol for the social networking and it stands for Web, Internet, Mobile, Protocol.
  • None of the above
What is the Window System of GUI?
  • A component which provides basic support for graphics hardware and pointing devices.
  • A component which provides basic support for USP and operating system.
  • A component which provides basic support for debugger and clean-up the Disk-C.
  • All the statements given above are correct about the Windowing system.
Which one of the following invented the television video games?
  • Ralph H Baer
  • MT Aito
  • John Moore
  • Richard Heitter
Consider the following statements:
Trackball is a input device consisting of a bail held by a socket containing sensors to detect a rotation of the ball about two axes.
Trackballs are used in the computerised radar consoles like an air-traffic control room or sonar equipment on a ship or submarine.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following persons is the pioneer in the development of the computer graphics?
  • Ivan Sutherland
  • Ralph Baer
  • John Warnock
  • Dennis Ritchie
Which one of the following is a set of program instruction that can attach itself to a file, reproduces itself and spread to other file?
  • Computer worm
  • Computer virus
  • Trojan horse
  • Phising scam
What is URL?
  • It is software used in the defragmentation of disk of computer.
  • It is software to make the computer screen-bright.
  • It is specific character stright that constitutes a reference to an internet resource.
  • It is a specific uniform alignment of the computer software to make run it faster.
Spam is related to ____________.
  • Computer
  • Art
  • Music
  • Game
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