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 a Flatbed scanner.

Key Points

• The flatbed scanner is used to scan documents by placing them upside down on a glass plate.
• A flatbed scanner provides a flat, glass surface to hold a sheet of paper, book, or another object for scanning.
• The scan head is moved under the glass.
• Flatbed scanners often come with sheet feeders for scanning multiple sheets of paper rather than one at a time.

Additional Information

Working of Flatbed Scanner:

• For modern scanners, a Charge-coupled device [CCD] is used.
• A CCD sensor is used to capture the light from the scanner and then convert it into proportional electrons.
• The charge developed will be more if the intensity of light that hits on the sensor is more. 

The correct answer is Internet Protocol.

Key Points

• The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries.
• Its routing function enables internetworking and essentially establishes the Internet.

• IP has the task of delivering packets from the source host to the destination host solely based on the IP addresses in the packet headers.

Additional Information

• Common Internet protocols include:-
  • TCP/IP (Transmission Control Protocol/Internet Protocol)
  • UDP/IP (User Datagram Protocol/Internet Protocol)
  • HTTP (HyperText Transfer Protocol)
  • FTP (File Transfer Protocol). TCP/IP is a stream protocol.

The correct answer is Input, Process, Output, Storage

Key Points

• Input is the act of putting information into a computer.
• That information is now processed in the central processing unit of the computer.
• After the processing is completed, the computer generates the output of that information.
• The output data is now stored in the computer memory.

Additional Information

Some input and output devices of computer:

• Input
  • Keyboard
  • Mouse
  • Scanner 
• Output 
  • Printer 
  • Monitor
  • Plotter