Answer the following questions.
1. Explain the term computer memory.
2. What is MICR and where is it used?
3. Which device is used for reading barcode?
4. What is an optical mark reader used for?
5. Write any two characteristics of a plotter.
6.
Mention the advantages of a computer.
Explain the difference between the following terms.
1. Primary memory and secondary memory
2. CU and MU
3. OMR and OCR
4. Printer and plotter
Answers
Answer:
1) Computer memory, device that is used to store data or programs (sequences of instructions) on a temporary or permanent basis for use in an electronic digital computer. Computers represent information in binary code, written as sequences of 0s and 1s.
2) Key Takeaways. Magnetic ink character recognition is the line on the bottom of a personal check that includes the account, routing, and check numbers. MICR numbers are readable by individuals and computers, where its special font helps limit check fraud.
3) A barcode scanner, also called a point-of-sale (POS) scanner or a price scanner, is a device used to capture and read information contained in a barcode. The scanner consists of a light source, a lens and a light sensor that translates optical impulses into electrical ones.
4) Optical mark reader (OMR) Optical Mark reading (OMR) is a method of entering data into a computer system. Optical Mark Readers reads pencil or pen marks made in pre-defined positions on paper forms as responses to questions or tick list prompts.
5) a) Materials that a plotter can draw on include sheet steel, plywood, aluminum, plastic, cardboard and almost any flat sheet material.
b) Efficiency, reproducibility, accuracy and speed are all attributes of a plotter.
6) a) Increase your productivity.
b) Can store massive amounts of information and reduce waste.
c) Connects you to the Internet.
d) Helps sort, organize, and search through information.
e) Data Security
and many more....
7) a) Primary memory is directly accessible by Processor/CPU. Secondary memory is not directly accessible by the CPU. ... The memory devices used for primary memory are semiconductor memories. The secondary memory devices are magnetic and optical memories.
b) MU: Memory Unit, is that part of Computer where the data is stored and is accessible to CPU( Central Processing Unit). CU: Control Unit, It directs the entire computer system to carry out or execute stored program instructions. ALU: Arithmetic Logic Unit, This unit performs the computing functions, involving numbers.
c) OMR recognizes whether there is any mark present in a predefined position. OCR, on the other hand, identifies the signs and characters and creates an editable word document of the scanned document. ... OMR is generally used in places such as evaluating the answer sheets of multiple-choice questions.
d) Plotter produces the data in hardcopy at a relatively slower rate when compared to a printer. Printer can only print a single line at a time. Plotters can easily draw continuous lines from point-to-point at same time. Printers are mainly used to produce graphics and text on a physical medium such as paper.
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Answer:
printer and ploterhchk gyan and sunio