4th Class Computers Science Computer and Its Peripherals Printer

     Printer  

Printers are output devices used to produce printed papers from the computer, Printers can produce text and images on paper and this is called 'hard copy'. Based on the technology used, they can be classified as Impact or Non-impact printers. Impact printers use the typewriting printing mechanism where there is a mechanical contact between the print head and paper. Dot-matrix and Character printers fall under this category. Non-impact printers do not touch the paper while printing. They use chemical, heat or electrical signals to etch the symbols on paper. Inkjet, DeskJet, Laser and Thermal printers fall under this category of printers. Printers are generally slow devices (30 pages per minute are considered fast) and the cost per page is actually relatively high.    

 Robson and Alan are discussing on the topic 'Printer'. Read their conversation and identify who is correct.

Robson: Printer is an output device and used to produce paper copies of output from the computer. Printers can produce text and images on paper and this is called 'hard copy'.

Alan: Now a days we see different types of printer in the market and laser printer is common among them.

(A) Robson is correct                                                     

(B) Alan is correct

(C) Both are correct                                                       

(D) Both are correct

(E) None of these  

Answer: (D)

Explanation

Correct Option:

(D) The information given by Robson and Alan is correct.

Incorrect Options:

(A) Information given by Robson is correct. Therefore, option (A) is incorrect.

(B) Information given by Alan is correct. Therefore, option (B) is incorrect.

(C) Both of them are correct. Therefore, option (C) is incorrect.  

 Match the following:

        A                                                             B

1. Impact printer                                        i. Thermal printers

                                                                    ii. Character printer

2. Non-impact printer                               iii. Laser printer

                                                                    iv. Dot-matrix printer

(A) 1 - iii, iv; 2 - i, ii                                           

(B) 1 - ii, iii; 2 - i, iv

(C) 1 - ii, iv; 2 - i, iii                                            

(D) 1 - ii; 2 - i, iii, iv  

(E) 1 - ii, iii, iv; 2 - i  

Answer: (c)

Explanation

Correct Option:

(C) Option (C) is matched correctly.

Incorrect Options:

(A) Option (A) is matched incorrectly. Therefore, option (A) is incorrect.

(B) Option (B) is matched incorrectly. Therefore, option (B) is incorrect.

(D) Option (D) is matched incorrectly. Therefore, option (D) is incorrect.

(E) Option (E) is matched incorrectly. Therefore, option (E) is incorrect,