Computer Awareness Questions

The correct answer is option 3, i.e. Control unit, arithmetic-logic unit, primary storage​.

Key Points

• The Central Processing Unit (CPU), the principal part of any digital computer system, generally composed of the main memory, control unit, and arithmetic-logic unit.
• It constitutes the physical heart of the entire computer system, it is linked to various peripheral equipment, including input/output devices and auxiliary storage units.
• In modern computers, the CPU is contained on an integrated circuit chip called a microprocessor.

Additional Information 

• The control unit part controls the input and output devices.
• Arithmetic-logic units do basic operations like addition, multiplication, and division. 
• A primary storage device is a medium that holds a memory for a short period of time while a computer is running.

The correct answer is Gigahertz.

Key Points

• The speed of the CPU is measured in Gigahertz.
  • A central processing unit or CPU enables your computer to interact with all of the applications and installed programmes.
  • CPU interprets the program’s instructions and creates the output that is the interface.
  • The performance of the CPU has a major effect on the speed at which programs run.
  • Clock speed (also “clock rate” or “frequency”) is an important attribute to measure the performance of a processor. 
  • A higher clock speed means a faster CPU.  
  • The CPU processes many instructions from different programs every second.
  • The clock speed measures the number of cycles the CPU executes per second.
    • ​It is measured in GHz (gigahertz).
  • A “cycle” is technically a pulse synchronized by an internal oscillator.
  • During each cycle, billions of transistors within the processor open and close.
  • A CPU with a clock speed of 3.2 GHz executes 3.2 billion cycles per second.  

The correct answer is Joint Photographic Experts Group.

Key Points

• JPEG stands for Joint Photographic Experts Group.
  • It is a computer graphics file format.
  • JPEG is a lossy compression method widely used for digital photographs.
  • In JPEG, the image is compressed to make a smaller file.
  • Compression results in a loss of quality, however, so it is usually undetectable.
  • JPEG files are widely used on the Internet, and JPEG is a popular digital camera format, making it ideal for non-professional printing and web use.
  • JPEG format is best for web images, non-professional printing, e-mail, PowerPoint.
  • The extensions ".jpeg" and ".jpg" are used for JPEG files.

Additional Information

• PNG (Portable Network Graphics) files are a lossless picture format that was created to replace and improve upon the gif format.
• GIF files (Graphics Interchange Format) are used for web graphics and can be animated and transparent.
• BMP (Bitmap Image File) is a file format designed by Microsoft for Windows that does not compress or lose information, allowing images to have very high quality while simultaneously having very large file sizes.

The correct answer is Fax.

Key Points

•  Fax machine
  • It is a device that is used to send documents electronically over a telephone network.
  • The transmission can be between two fax machines, or between a fax machine and computer.
  • It digitizes the material with an internal optical scanner and transmitting the information as electronic signals.
• Bandwidth is the maximum amount of data transmitted over an internet connection in a given amount of time. It is expressed as a bitrate and measured in bits per second (bps).

The correct answer is Monitor.

Key Points

• A computer monitor is an output device that displays information in pictorial form.

Additional Information

• Plotter - A plotter is a printer that interprets commands from a computer to make line drawings on paper with one or more automated pens.
• Scanner - A scanner is an input device.
• Printer - It is an output device.

The correct answer is Cache memory.

• ​Cache memory is a high-speed storage area for temporary storage.
  • It is the smaller and fastest memory component in the computer.
  • It is used during the reading and writing processes from the disk.
  • It acts as a buffer between RAM and the CPU.

Additional Information

• Flash drive is popularly known as a pen drive.
• A pen drive is also called a USB flash drive.
  • It is a data storage device that includes flash memory with an integrated USB interface.
•  The RAM is a read/write memory.
  • The CPU can change the contents of the RAM at any time.
  • RAM is volatile.
• Read-Only Memory (ROM) is non-volatile and retains its information even after the power is turned off.

The correct answer is Voice recognition.

• A voice recognition module is a device that converts spoken words into information that the computer can recognize and process.
• Alternatively referred to as speech recognition, voice recognition is a computer software program or hardware device with the ability to decode the human voice.
• Voice recognition is commonly used to operate a device, perform commands, or write without having to use a keyboard, mouse, or press any buttons.
• Today, this is done on a computer with ASR (automatic speech recognition) software programs.

Additional Information

The correct answer is Central Processing Unit.

Key Points

• Central Processing Unit (CPU): It is the most important unit, where all the processing jobs take place. CPU is the control centre of the computer and hence it is said to be the brain of the computer.

Additional Information 

• CPU has three main components:
  • Arithmetic Logic Unit (ALU): It performs all the arithmetic operations like addition (+), multiplication (*), subtraction (-), division (/) on the numerical data directed by the control unit. All the logical operations, like less than (<), greater than (>), equal to (=), not equal to (≠) etc. are also carried out by ALU.
  • Control Unit (CU): It controls and coordinates all the operations taking place in the system. It controls the flow of data and information from one unit to the other.
  • Registers/Memory Unit (MU): To execute a program, data and instructions need to be stored temporarily. This storage is done in the MU. The data and instructions are retrieved from MU by Control Unit for supplying to ALU as when required by the program.

The correct answer is www.twitter.com.

Key Points

• Twitter
  • It is an American microblogging and social networking service.
  • It was created by Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams in March 2006 and launched in July of that year.
  • Registered users can post, like, and retweet tweets, but unregistered users can only read those that are publicly available.

Important Points

• In July 2016 Flipkart acquired Jabong through its unit Myntra for about $70 million.
  • In February 2020, Flipkart formally shut down Jabong to shift focus completely on its premium clothing platform Myntra.
  • Jabong was an e-shopping website.
• Flipkart and Pepperfry are e-shopping websites too.

The correct answer is Printer.

Key Points

• A printer produces the output from the computer on paper.
  • The printer is the output device that helps to display hard copies on paper.
  • Printers are used to create a permanent representation of visuals or text, which is often printed on paper.
  • It receives the text and graphic output from a computer and converts it to paper.
• important output devices of a computer are:
  • Monitor.
  • Printer.
  • Headphones.
  • Computer Speakers.
  • Projector.
  • GPS.
  • Sound Card.
  • Video Card.

Additional Information

• A scanner is a device that scans images and printed text optically and converts it to a digital image.
• The keyboard is the primary input device.
• A barcode reader is an optical scanner that can read printed barcodes, decode the data inside, and communicate the information to a computer.