Question Discussion & Solution

The correct answer is 2²⁰ bytes.

Key Points

• Originally megabyte was used to describe a byte multiple (2²⁰ = 1024 x 1024 = 1,048,576) in computer programming.
• However, several international organizations and most storage media (including hard drives and DVDs) use the Latin approach to the measurement whereby a megabyte is 10³ bytes (1000 x 1000 = 1,000,000).

Additional Information 

• 1 byte = 8 bits
• 1024 KB = 1 MB
• 1024 MB = 1 GB
• 1024 GB = 1 TB

The correct answer is Ctrl + Z.

Key Points

• To undo an action press Ctrl+Z.
• If you prefer your mouse, click Undo on the Quick Access Toolbar.
• You can press Undo (or CTRL+Z) repeatedly if you want to undo multiple steps. 
• Undo means to destroy the effect of something that has already happened.

Additional Information

Important Shortcut keys used in MS Word:

• Cut the selected content to the Clipboard - Ctrl+X
• Copy the selected content to the Clipboard - Ctrl+C
• Paste the contents of the Clipboard -Ctrl+V
• Increase the font size by 1 point.- Ctrl+]
• Center the text - Ctrl+E
• Align the text to the left - Ctrl+L 

The correct answer is Understanding.

Key Points

• UNDERSTANDING:
  • It is a thing that is not performed by machines but requires the human touch.
  • Machines like computers, etc. work according to the commands given to them and can not analyze the action on their own.
  • Thus, understanding is the work not done by a computer.

Additional Information

• COMPUTING:
  • Computing in its absolute terms means using computers for processing data or performing calculations.
  • It can be defined as the process of using computer technology to complete a given goal-oriented task using algorithms.
• PROCESSING:
  • It is the process by which the CPU (Central Processing Unit) of the computer converts the data received into information.
  • In other terms, it may be defined as the action or series of actions undertaken by the CPU to convert data into information.
  • It is for this reason the CPU is regarded as the 'brain' of the computer.
  • The general steps involved in the processing are - fetch, decode, execute, and write back.
• ​OUTPUTTING:
  • ​Output is the result given by a computer after processing the data and the process of delivering the output is termed as 'outputting'.
  • Output is most commonly displayed on the computer screen.
  • The devices capable of showing the output are - Monitor, Printer, Plotters, Speakers, Speech synthesizers, etc.

The correct answer is Secondary.

• USB Pendrive is a Secondary type of storage device.

Key Points

• The full form of USB is Universal Serial Bus.
• USB is a plug and play interface that allows a computer to communicate with external and other devices.
• The first commercial release of the Universal Serial Bus (version 1.0) was in January 1996.
• USB connectors come in different shapes and sizes. They are of various types which include the standard USB, Mini USB, and Micro USB, have two or more variations of connectors.

Additional Information

• A primary storage device is a storage medium that holds a memory for short periods of time while a computer is running.
• Random-access memory (RAM) and cache are both examples of a primary storage device.
• Tertiary storage devices comprise high-capacity data archives designed to include vast numbers of removable media, such as tapes or optical discs.

The correct answer is ROM.

Key Points

• Each memory cell of a ROM chip has either a transistor for a 1 bit or none for a 0 bit.
• ROMs(Read-only memory) is used for programs that are essential parts of a computer’s operation, such as the bootstrap program that starts a computer and loads its operating system or the BIOS (basic input/output system) that addresses external devices in a personal computer (PC). 
• EPROM (erasable programmable ROM), EAROM (electrically alterable ROM), and flash memory are types of nonvolatile memories that are rewritable, though the rewriting is far more time-consuming than reading.
• They are thus used as special-purpose memories where writing is seldom necessary—if used for the BIOS, for example, they may be changed to correct errors or update features.

Additional Information

• Cache memory:
  • Cache memory, also called Cache, a supplementary memory system that temporarily stores frequently used instructions and data for quicker processing by the central processor of a computer.
  • The cache augments and is an extension of, a computer’s main memory.
  • Both main memory and cache are internal, random-access memories (RAMs) that use semiconductor-based transistor circuits.
  • The cache holds a copy of only the most frequently used information or program codes stored in the main memory; the smaller capacity of the cache reduces the time required to locate data within it and provide it to the computer for processing. 
• RAM:
  • RAM, in full random-access memory, Computer main memory in which specific contents can be accessed (read or written) directly by the CPU in a very short time regardless of the sequence (and hence location) in which they were recorded.
  • Two types of memory are possible with random-access circuits, static RAM (SRAM) and dynamic RAM (DRAM).
  • A single memory chip is made up of several million memory cells.
  • In an SRAM chip, each memory cell stores a binary digit (1 or 0) for as long as power is supplied.
  • In a DRAM chip, the charge on individual memory cells must be refreshed periodically in order to retain data.
  • Because it has fewer components, DRAM requires less chip area than SRAM; hence a DRAM chip can hold more memory, though its access time is slower.