Worksheet Solutions: Computer System | Computer Applications for Class 9 PDF Download

Q.1. Fill in the blanks with the given words.
(i) The term system refers to a group of interconnected components which work together to perform an integrated whole.
(ii) Data are raw facts which when processed gives us Information.
(iii) The Output Unit is responsible for recording the final results sent from internal storage unit.
(iv) The Control Unit directs the operation of all components and units of the computer system as per the instructions given in a program.
(v) The ALU unit of the CPU is responsible for all arithmetic as well as logical operations.
(vi) The Scanner is an input device that captures information from a page and store them in graphic format.
(vii) The Laser printer uses toner to print images.
(viii) The Inkjet printer fires ink drops on paper for printing.
(ix) A webcam is a video camera that feeds or streams its image in real time to or through a computer to a computer network.
(x) A block  is a sector or a group of sectors that the operating system can address in a hard disk.

Q.2. State whether the following statements are True (T) or False (F).
(i) Webcam can be used to record moving video with sound. True
(ii) The term “Versatile” used to define a characteristic of a computer that is used to tell that a computer can do different type of task. True
(iii) Processing of Information gives Data. False
(iv) The Input Unit of the Computer is responsible for holding input data and intermediate results. True
(v) ROM is volatile in nature. False
(vi) The direction key on a keyboard is used to move the cursor on the screen. True
(vii) A mouse can have only one button. False
(viii) A Scanner is used to display data on the screen. False
(ix) Dot Matrix Printer is an example of an non- Impact Printer. False
(x) Among all the memories, the Registers are the fastest memory. True