Question Discussion & Solution

The correct answer is Programmable read-only memory

Key Points

• PROM stands for Programmable Read Only Memory.
• Read only memory (ROM) is a type of memory that is used in electronics and computers.
• It is a non-volatile memory, that is, information stored in such a memory is permanent and cannot be changed.
• Other two types of ROM are
  • Electrically Erasable Programmable ROM (EEPROM)
  • Erasable Programmable ROM (EPROM)

Additional Information

• Primary memory can be divided into RAM (Random Access Memory) and ROM (Read Only Memory)

The correct answer is (i) only.

Key Points

• CD-R stands for Compact Disk-Recordable.
• CD-RW stands for Compact Disk-ReWritable.
• CD-RW disks are expensive than CD-R disks.
• CD-R (COMPACT DISC – Recordable) is a digital optical disc storage format.
• A CD-R disc is a compact disc that can be written once and read arbitrarily many times.
• CD-R discs (CD-Rs) are readable by most plain CD readers.

Additional Information

• A Compact Disc Recordable (CD-R) is a Write Once Read Multiple (WORM) disc.
• These discs can only record data once and then the data becomes permanent on the disc.
• A Compact Disc Re-Writable (CD-RW) is an erasable disc that can be reused. 
• A CD-R is typically 700 MB of memory.

The correct answer is Text file.

Key Points

• A text file (sometimes spelled textfile) is a kind of computer file that is structured as a sequence of lines of electronic text.
• A text file exists as data within a computer file system. 
• "Text file" refers to a type of container, while plain text refers to a type of content.

Additional Information

Extension of some other important files:

• Excel file - Xls
• Word file - doc
• Powerpoint file - ppt 
• Open document - Odt

The correct answer is cell.

Key Points

• The basic unit of an Excel spreadsheet where we enter data is known as a cell.
• Every worksheet is composed up of thousands of rectangles, which are called cells.
• A cell is the intersection of a row and a column.

Additional Information

• Columns are recognized by letters (A, B, C), while rows are identified by numbers (1, 2, 3).
• Each cell has its own name or cell address rooted on its column and row.
• The cell address will also embark in the Name box.

The devices which send data or control signals to the computer or processing unit are known as Input devices.

• Examples of input devices are- Mouse, Keyboard, Microphone, Scanner, Joystick, etc.
• From the given options, Joystick, scanner, and Keyboard are input devices. 
• The scanner is an input device used for direct data entry from the source document into the computer system.
• It converts the document image into digital form so that it can be fed into the computer. 
• The keyboard is the device that is used to enter all the data into the computer. 
• It directs the computer through instructions.
• Normally the keyboard has 104 buttons called the keys.

Hence, only a printer is not an input device, it is an output device.

Printer:

• A printer is basically an output device that prints a hard copy of the electronic data that is stored in the computer or any other device.
• The electronic data may include documents, text, images, or even the combination of all three.
• Particular printers are available for printing particular data types.

Hence, a printer is the correct answer here.