CLASS IX WORKSHEET 2 SEPTEMBER

 

Computer Applications

 Class IX    

                 Worksheet

Q1. Multiple choice questions:-

a.    The physical components of the computer system are called

i)                 Software         ii) Hardware          iii) Firmware

b.   Which one is the device that is the ‘brain’ of a computer system?

i)                 CPU             ii) Motherboard           iii) Scanner

c.    Out of these which one is a volatile memory?

i)                 ROM        ii) RAM            iii) Floppy

d.   A byte consists of................................. bits.

i)                 2               ii) 4                 iii) 8

e.    The smallest unit of data in a computer is…………..

i)                 Bit             ii) Byte               iii) nibble

f.     1 Gigabyte (GB)= ............................... MB

i)                 100              ii) 1000                iii) 1024

g.   Unprocessed raw facts and figures are known as

i)                 Information           ii) Storage             iii) Data

h.   Set of instructions given to computers are called a ……..

i)                 Program                 ii) Data                   iii) Icon

Q2. Fill in the blanks:-

a.      Computers have …ZERO…..IQ.

b.     …Supercomputer..is the most powerful computer.

c.      Data are the raw facts from which information are derived.

d.     ALU stands for…Arithmetic logic Unit.

e.      The processed and meaningful form of data is called

Information

    f. ICT and SmartTV are the example of convergence of

        technology.

    g. PDA stands for Personal digital assistant.

    h. ALU stands for Arithmetic Logic Unit.

    i. Registers offer very fast memory but limited in size.

    j. ICT stands for Information and Communication Technology .

 

 

Q3. Differentiate between RAM and ROM?

RAM	ROM
Random Access memory	Read only memory
RAM allows the computer to read data quickly to run applications.	ROM stores the program required to initially boot or reboot the computer.
It allows reading and writing.	It only allows reading.
RAM is volatile i.e. its contents are lost when the device is powered off.	It is non-volatile i.e. its contents are retained even when the device is powered off.

 

Q4. What is the function of memory? What are its measuring units?

Ans  The memory that holds data and instructions during processing. It 

         is temporary memory. While secondary memory can store data or

         files for later use i.e. permanently. Bit, byte, kb, mb, gb etc. are

         its measuring units.

 

Q5. What do you understand by Formatting?

Answer: Formatting means changes or editing the document.

There are different types of formatting available in MS Word like Text formatting, Character formatting, page formatting etc.

 

Q6 What are margins? How many types of margins can be defined in a MS Word  

      document?

Answer: A margin is the space between the text and an edge of our document.

There are four types of margins: left, right, top and bottom.

 

Q7. What is meant by Alignment? Name the different types of alignments.

Answer: Alignment means align the text in the document. There are different types of alignments like left, right, center and justify alignments.

Q8. What is the use of Header and Footer?

Answer: Header is place at the top and Footer is place at the bottom of the

              document. Header and Footer is used to write the title, date, name, page

              number on the document.

Q9. Explain the following terms-

a.     CPU-  The CPU is also called the microprocessor or simply the

processor. CPU controls and directs the internal activities and actions of a computer. A CPU does the entire thinking and controlling in a processing action. All other parts of a computer work as directed by the CPU. 

 

b.    ALU-  This unit performs the arithmetic operations i.e. addition,

subtraction, multiplication and division. All logic operations

                        which involves comparisons such as less than, greater than, or

                         equal to.

 

Q10. Write a short note:-

     Supercomputers- are the most powerful computers among digital computers. These consist of several processors running together thereby making them immensely faster and powerful. These computers are capable of handling huge amounts of calculations that are beyond human capabilities. Supercomputers can perform billions of instructions per second. These are mainly used in applications like weather forecasting, nuclear science research, aerodynamic modeling, seismology, metrology etc. Ex- Cray x-mp-14, Param, Pace.