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The correct answer is : option 5 ( Register Memory)

Key Points 

Access time refers to the time taken to read from or write to a memory location. The memory hierarchy is designed such that the fastest memories are closest to the CPU.

Register Memory: Registers are the smallest and fastest memory locations located directly inside the CPU. They have the shortest access time (typically 1 clock cycle) because they are integrated into the CPU and are used to hold data that is being processed immediately.

Cache memory: This is very fast memory (SRAM) that sits between the CPU and main memory (RAM). It has a longer access time than registers but is faster than RAM.

RAM (Random Access Memory): This is the main volatile memory (DRAM) with access times slower than cache and registers.

Magnetic core memory: This is an obsolete type of memory used in early computers. It is non-volatile but has much slower access times compared to modern semiconductor memories.

Magnetic bubble memory: This is a non-volatile memory technology from the past that uses magnetic domains. It is slower than semiconductor memories like RAM and cache.

Why Register Memory has the shortest access time:

Registers are part of the CPU itself and are accessed directly during execution. Their access time is minimal (often within a single CPU clock cycle), making them the fastest memory in the hierarchy.

The correct answer is Tracks.

• Tracks are the other name for concentric circles on the platter of the hard disk. A disk drive track is a circular path on the surface of a disk or diskette on which information is magnetically recorded and from which recorded information is read.
• A track is a physical division of data in a disk drive, as used in the Cylinder-Head-Record (CHR) addressing mode of a CKD disk. The concept is concentric, through the physical platters, being a data circle per each cylinder of the whole disk drive.
• In other words, the number of tracks on a single surface in the drive exactly equals the number of cylinders of the drive.
• A hard disk drive (HDD), hard disk, hard drive or fixed disk is a data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.
• The platters are paired with magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces

The correct answer is Indian Statistical Institute, Calcutta, 1955

Key Points

• India’s first computer was installed in 1955 in Indian Statistical Institute, Calcutta (now called Kolkata).

History of India’s first computer

• The age of computers in India began in 1955 with the installation of HEC-2M
• HEC-2M was a computer designed by A.D.Booth in England
• The Indian Statistical Institute (ISI) at Calcutta (now Kolkata) was the first institute to have the privilege.
• India bought its first computer for the amount of Rs 10 lakh.
• It was also recognized as a number-crunching machine with a huge size.

The computer age in India began in 1955 with the installation of HEC-2M (a computer designed by A.D.Booth in England) at the Indian Statistical Institute (ISI) at Calcutta (now Kolkata)

The correct answer is Trackball.

Key Points

• A trackball is an input device used to enter motion data into computers or other electronic devices.
• Trackballs designed for computers usually serve as mouse replacements and are essentially used to move the cursor on the screen.
• An input device forwards information to a computer system for processing. Input devices only allow for input of data to a computer.
• Output device reproduces or displays the results of the processing. Output devices only receive the output of data from another device.

Scanner takes input from graphical images and pictures by scanning and send it to computer.. 

Explanation:

• A microprocessor is an integrated circuit (IC) which incorporates all the core functions of CPU (Central Processing Unit).
• RISC stands for reduced instruction set computer.
• A reduced instruction set computer (RISC) is a computer instruction set that allows a computer's microprocessor to have fewer cycles per instruction (CPI) than a complex instruction set computer (CISC).

The correct answer is Autofill.

Key Points 

• Autofill in spreadsheet applications, such as Microsoft Excel, provides an easy way to fill in empty cells. After entering information in one or two cells, you can drag the fill handle (the small box in the lower-right corner of the current selection) across multiple cells to automatically fill them in with similar data. Autofill can be used for both rows (horizontally) and columns (vertically).
• For example, if you enter "1" in cell A1, then drag the fill handle downwards, autofill will automatically fill in the selected cells with the number 1. If you enter "1" in A1 and "2" in A2, then select both A1 and A2, then drag the fill handle downwards, it will increment the values in the cells. A3 will become "3," A4 will become "4," etc. If you enter "2" in A1 and "4" in A2, the values will increment by two. For example, A3 will become "6," A4 will become "8," etc.

Additional Information 

• Autofill is a software function that automatically enters data in web forms and spreadsheets. It should not be confused with autocomplete or autocorrect, which perform separate functions. Autocomplete finishes words or phrases while typing, and autocorrect automatically fixes spelling mistakes.
• While both web browsers and spreadsheet applications support autofill, the functionality is different.

The correct answer is Ctrl+A

To select the entire document the keyboard shortcut CTRL+A is used. ​

Additional Information

Word shortcut keys

• Ctrl + A -- Select all contents of the page.
• Ctrl + B -- Bold highlighted selection.
• Ctrl + C -- Copy selected text.
• Ctrl + X -- Cut selected text.
• Ctrl + N -- Open new/blank document.
• Ctrl + O -- Open options.
• Ctrl + P -- Open the print window.
• Ctrl + F -- Open find box.

The correct answer is Draft.

Key Points

• A draft is simply an email message you haven't yet sent.
• The Drafts folder is where you keep email messages that you have not yet completed or plan to send at a later time.
• It is an email message you close by choosing File→Save or closing the window rather than clicking the Send button.
• This act places the message into the Drafts folder.
• Drafts in Gmail contains the emails which are composed but not sent.​

Additional Information

• Inbox by Gmail scans the user's incoming Gmail messages for information.
• It gathers email messages related to the same overall topic to an organized bundle with a title describing the bundle's content.
• The service highlights key details and important information in messages, such as flight itineraries, event information, and photos and documents.
• Sent- The message successfully sent to the recipient.
• Once the message has been sent, most e-mail programs move the message to the "Sent" or "Sent Messages" folder.

The correct option is (4)

Ctrl + S

Key Points

• The options in the File menu, Save the page, or Save As page, which you can access from the normal or editing view, are included in this table along with the shortcuts for saving and renaming Microsoft 365 files using those options. Use Ctrl+S to rapidly save a file.
• If you want to create a new document, change the filename, or file format, or save the file in a different location on your computer, you must save the current document first. use the Ctrl+Shift+S keyboard shortcut.
• Save a Copy has taken the position of Word, Excel, and PowerPoint's Save As feature. Do the following in order to save a copy of a file: Choose File > Save a Copy. Choose a location to save the file. After entering a file name, select Save a Copy.

Additional Information

• To open the slide show settings in PowerPoint, use Alt+S on the keyboard.
• The system information window is opened by pressing Ctrl, Alt, and S.