(Sumita Arora) Textbook Solutions 7th Edn
Q1: Storage of 1KB means the following number of bytes:
Answer: (c) 1024 bytes
Q2: One Megabyte is equivalent to
(a) 210 bytes
(b) 220 bytes
(d) none of these
Answer: (b) 220 bytes (1 MB = 1024 KB = 210 KB = 210× 210 bytes = 220 bytes)
Q3:What do you understand by IPO cycle?
Answer: It stands of Input-Process-Output cycle. A computer follows IPO cycle i.e. it takes data as input, processes it and takes out information as an output.
Q4: What are the functional components of a digital computer?
Answer: The functional components of a digital computer are:
- Input Unit
- Central Processing Unit (CPU) consisting of ALU (Arithmetic Logic Unit) and CU (Control Unit)
- Output Unit
- Storage (Memory)
Q5: What are the components of CPU? What is its role? What is the function of control unit of CPU?
Answer: The CPU is the brain of the computer system. It has three main components:
- Arithmetic and Logic Unit (ALU)
- Control Unit
Q6: What is the highest memory unit known so far?
Answer: Geop Byte
Q7: What role does input play in a computer?
Answer: Roles an input unit plays in a computer are:
- acts as an interface between user and the CPU
- accepts data and instructions to feed into CPU
- examples are keyboard, mouse, light pen, touch screen etc.
Q8: What role does the output play in a computer?
Answer: Computers talks to the outer world (humans) via output devices. Output unit takes machine
coded output results from the processor and converts them into a form that can be used by human beings.