A. One KB has 1024 bytes.
B. Cache memory is a secondary storage.
C. Operating system is not an application software.
D. Hub is a network device.
E. ALU is a control unit.
Choose the correct answer from the options given below:
Computer Fundamentals: Correct Statement Analysis
This solution breaks down each statement related to computer components and concepts to identify the correct ones.
Statement A: KB Definition
The statement "One KB has 1024 bytes" is correct. In digital computing, a Kilobyte (KB) is standardly defined as $1024$ Bytes. This is based on powers of 2, where $1 \text{ KB} = 2^{10} \text{ Bytes}$.
Statement B: Cache Memory Classification
The statement "Cache memory is a secondary storage" is incorrect. Cache memory is a very fast, small memory buffer located closer to the processor (CPU) than main memory (RAM). It stores frequently accessed data to speed up processing. This makes it a type of primary or intermediate storage, whereas secondary storage refers to long-term storage devices like hard drives or SSDs.
Statement C: Operating System Software Type
The statement "Operating system is not an application software" is correct. An Operating System (OS) is classified as system software. System software manages the computer's hardware and provides a platform for application software to run. Application software consists of programs designed for end-user tasks, such as word processing or web browsing.
Statement D: Hub Role in Networking
The statement "Hub is a network device" is correct. A computer hub is a hardware component used in computer networks to connect multiple devices together. It functions by receiving data packets and retransmitting them to all other connected devices, facilitating communication within a Local Area Network (LAN).
Statement E: ALU and Control Unit Distinction
The statement "ALU is a control unit" is incorrect. The ALU (Arithmetic Logic Unit) is a crucial part of the CPU responsible for performing arithmetic calculations (e.g., addition, subtraction) and logical operations (e.g., AND, OR). The Control Unit (CU), another key CPU component, directs the operation of the processor, fetching instructions and coordinating the activities of the ALU and other components.
Summary of Correct Computer Statements
Reviewing the analysis:
- Statement A is correct (1 KB = 1024 Bytes).
- Statement B is incorrect (Cache is primary/intermediate, not secondary storage).
- Statement C is correct (OS is system software).
- Statement D is correct (Hub is a network device).
- Statement E is incorrect (ALU performs calculations, CU controls operations).
The statements confirmed as correct are A, C, and D. This aligns with the option listing A, C, and D only.
Important Questions from Memory
One Exabyte is equal to ______.
Which of the following needs to be refreshed to retain data even when power is on (electric current flows)?
Which of the following has the highest storage?
Which storage medium has tracks and sectors?
The actual timing signals that govern the transfer of data between input unit, processor, memory and output units are generated by the ________ and the ______ stores the processed data.
