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Class 7
Chapter - 1 Number System A computer can understand only a few symbols called digits and symbols. Computers use these number systems to store, represent, and perform computations on data. The most common number systems used in computers are: Binary number system : Binary Number system consists of two digits 0s and 1s. Its base is 2. 0 means the transistor or switch is in OFF state and 1 means it is in ON state. Octal number system : Octal number system that uses digits 0 to 7. Hence, the base of octal number system is 8. Octal Number System is used as shorthand representation of long binary digits. Decimal number system : Decimal number system that uses digits 0 to 9. Hence, the base of decimal number system is 10. Hexadecimal number system: Octal number system that uses digits 0 to 9 and A to F. Hence, the base of octal num...
Class 8
Fundamentals of Computer Q1. What is computer? Ans. Computer is an electronic machine that can store and process the data. Q2. What is data? Ans. Collection of words, numbers, characters and facts is called data. Q3. What is Information? Ans. meaningful data or summary of data is called Information. Q4. What is an instruction? Ans. Step by step procedure of operations in computer is called an instruction. Q5. What is a program? Ans. A set of instructions is called a program. Q6. Explain the types of components in computer? Ans. A computer has two type of components – Hardware and Software. Hardware – The computer components that are ph...
Class 6
Chapter 1 – Fundamentals of Computer Short answer type questions – Q1. Name any two hardware parts attached inside the CPU box. Ans. Parts attached inside the CPU box are called internal hardware. Some internal hardware are - a) CPU chip – Control Processing Unit b) Motherboard c) SMPS - Switched Mode Power Supply d) Sound Card e) Video Card f) Ports g) NIC - Network Interface Card Q2. What does CD-RW stand for? Ans. CD-RW stands for Compact Disc Rewritable. Q3. What is an Operating system? Ans. An operating system is a system software that works as a mediator between user and computer hardware. Q4. Write three names of general purpose software. Ans. General purpose Software can be classified into sev...