Question Discussion & Solution

The correct answer is Trap doors.

The Trap doors are code that recognizes some special sequence of input or is triggered by being run from a certain user ID by an unlikely sequence of events.

Key Points

• Trap Door:
  • A trap door is a secret entry point into a program that allows anyone to gain access to any system without going through the usual security access procedures.
  • It is a method of bypassing normal authentication methods.
  • Hence it is also known as a back door.
  • It is used by the Programmers to debug and test programs. 
  • It can become a threat when any dishonest programmers gain illegal access. 

Additional Information

• A standalone malicious program that may give full control of an infected PC to another PC is called Trojan horse.
• A logic bomb is a small code that is intentionally inserted into a software system and will set off a malicious function when specified conditions are met. 
• A virus is a computer program that can change and replicates itself by modifying other computer programs and inserting its own code. 

The correct answer is Esc.

Key Points

• Esc key does not appear in duplicate on a standard QWERTY keyboard.
• QWERTY is a keyboard design for Latin-script alphabets.
• The name comes from the order of the first six keys on the top left letter row of the keyboard (Q W E R T Y).
• The QWERTY design is based on a layout created for the Sholes and Glidden typewriter and sold to E. Remington and Sons in 1873.

Additional Information

• Esc is a key found on the top-left corner of a computer keyboard.
• It allows the user to abort, cancel, or close an operation.
• For example, if a web page was loading slow on an Internet browser, pressing the Escape key stops the download. 

The correct answer is Ctrl+N.

Key Points

• Ctrl+N is the shortcut key used to open a New Document in the MS office.
• In the new document new worksheet is opened in the same window. 

Additional Information

• Some important shortcuts used in MS Excel:
  • Ctrl + O Open an existing workbook.
  • Ctrl + S Save the active workbook.
  • F12 Save the active workbook under a new name, displays the Save as dialog box.
  • Ctrl + W Close the active workbook.
  • Ctrl + C Copy the contents of the selected cells to Clipboard.
  • Ctrl + X Cut the contents of the selected cells to Clipboard.
  • Ctrl + V Insert the contents of the Clipboard into the selected cell(s).

The correct answer is Machine Language.

Key Points

• Low-level languages are also known as Machine Language.
• A low-level programming language is a programming language that provides little or no abstraction from a computer's instruction set architecture commands or functions in the language map closely to processor instructions.
• Generally, this refers to either machine code or assembly language.

Additional Information

• Examples of low-level programming languages:
  • C and C++ are now considered low-level languages because they have no automatic memory management. 
• Low-level languages were developed first, and high-level languages came along later.
• High-level languages are more easily understood by humans mostly coding languages like Java.

The correct answer is Microcomputers.

Key Points

• Microcomputers generally have the least processing and storage capacity.
• A microcomputer is a complete computer on a small scale, designed for use by one person at a time.
• An antiquated term, a microcomputer is now primarily called a personal computer (PC), or a device based on a single-chip microprocessor.
• Common microcomputers include laptops and desktops.

Additional Information

• A mainframe computer informally called a mainframe or big iron is a computer used primarily by large organizations for critical applications, bulk data processing. 
• A supercomputer is a computer with a high level of performance as compared to a general-purpose computer. 
• A minicomputer is a type of computer that possesses most of the features and capabilities of a large computer but is smaller in physical size.