Exercise

Section: A Multiple Choice Questions
1. Detecting the problem in a computer system when it is not working properly is called ...................
    A. Helping
    B. End Task
    C. Troubleshooting
2. ................... is an example of application software.
    A. MS-DOS
    B. Norton
    C. Oracle
3. A ................... is a collection of all the files in an organization.
    A. Field
    B. Record
    C. Database
4. ................... keys open Task Manager window.
    A. Ctrl + Alt
    B.Shift + Delete
    C. Ctrl + Alt + Delete
(Answer: 1-C, 2-C, 3-C, 4-C)

Section: B Fill in the blanks
1. A computer is a machine for manipulating data according to a list of instruction known as a program.
2. A projector is used to display video, images or computer data on a large screen.
3. Monitor and Printer are the most commonly used output devices.
4. The storage device of a computer system is referred to computer memory.

Section: C Quiz
1. Which memory is not directly accessed by CPU?
Answer: Secondary memory is nor directly accessible by the CPU.

2. How many bits make one byte?
Answer: 8 bits make one byte.

3. Name the different types of scanners.
Answer: Flatbed and Handheld are the types of scanners.
 
Section: D Very Short Answer Questions
1.  Define field and record.
Answer: A field is a collection of bytes that contains data about an item. A record is a collection of interrelated fields.

2. Name the two types of memory.
Answer: Primary memory and secondary memory are the two types of memory.

3. Name the different types of software.
Answer: Software is classified into two categories: i) System software and ii) Application software.

4. What is a plotter?
Answer: A plotter is an output device used to make large paper drawing such as construction map or engineering drawings.

Section: E Short Answer Questions
1. Define the terms: hardware and software
Answer: Hardware: Hardware is the physical parts of a computer system, which you can touch and feel. It governs the operations of a computer system.
Software: Software is a set of programs, that control the computer hardware parts and make them operational.

2. What is the data hierarchy?
Answer: Data hierarchy is the order in which the data is stored in a computer database.   

3. What is a bit?
Answer: Bit is the smallest unit of a data. A bit is the short form of Binary Digit. A computer represents data using digits 0 and 1.

4. Write short notes on the following with suitable examples.
(A) Application software
Answer: Application software consists of programs that are designed to do specific tasks, such as payroll, inventory, word processing, graphics, spreadsheets and desktop publishing. Example: MS Word, Adobe Photoshop.

(B) System Software
Answer: System software performs the basic functions that are necessary to operate a computer system. It controls the various resources of a computer system. Example: Windows Operating System.

Section: F Long Answer Question 
1. Explain computer memory and its types.
Answer: The storage device of a computer system is known as its memory. The memory unit can receive data, hold it and deliver according to the instructions from the control unit.
There are two types of memory:
i) Primary memory: Primary memory is the main memory of the computer system. RAM and ROM are two major types of primary memory.
ii) Secondary memory: Secondary memory is used to store data for a long time. Secondary memory is permanent in nature. Exmaples of secondary memory are hard disk, compact disc, pen drive etc.

2. What do you do when your computer is hung?
Answer: When the computer hung, it suddenly stops responding to your commands:
Step:1 Press Ctrl + Alt + Delete key combination.
Step:2 Choose start task manager.
Step:3 Click and select the application displays the message 'Not Responding'.
Step:4 Now, click on the End Task button to terminate the problem.

3. Explain the different types of printers.
Answer: Types of printer:
i). Dot Matrix:

• Movable print heads
• Pins strike ribbon placing dots on paper
• less expensive

ii)  Inkjet Printer:

• Letters formed by spraying streams of quick-drying ink
• less noicy
• speed given in lpm

iii) Laser Printer:

• Use laser technology to print
• best quality output
• most expensive