Question Discussion & Solution

The correct answer is F2.

Key Points

• F2 function key is used to edit the content of a cell in MS-Excel.
• To enter Edit mode, we can follow any of these steps:
  • Double-click the cell that contains the data that you want to edit.
  • Click the cell that contains the data that you want to edit, and then click anywhere in the formula bar.
  • Click the cell that contains the data that you want to edit, and then press F2.

Additional Information

Some important shortcuts used in MS Excel:

• Ctrl + N Create a new workbook.
• 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 Seek time.

Key Points

• Seek time is the time taken for a hard disk controller to locate a specific piece of stored data.
• Other delays include transfer time (data rate) and rotational delay (latency).
• When anything is read or written to a disc drive, the read/write head of the disc needs to move to the right position.
• The actual physical positioning of the read/write head of the disc is called seeking.

Additional Information

• Latency is a measure of delay.
• In a network, latency measures the time it takes for some data to get to its destination across the network. 
• In computing, turnaround time is the total time taken between the submission of a program/process/thread/task (Linux) for execution and the return of the complete output to the customer/user.  

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 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 Backspace.

Key Points

• The backspace key is used to delete a word or a line.
• Backspace is the keyboard key that originally pushed the typewriter carriage one position backwards, and in modern computer systems moves the display cursor one position backwards.
• It deletes the character at that position, and shifts back the text after that position by one position.

Additional Information

• The Alt key on a computer keyboard is used to change (alternate) the function of other pressed keys.
• Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key. 
• The shift key is a modifier key on a keyboard, used to type capital letters and another alternate "upper" characters. 
• The Insert key insert (often abbreviated Ins) is a key commonly found on computer keyboards.