Operating Systems and Computer Architecture: Key Concepts
Chapter 1 – Operating Systems
1. How would you use a computer without an operating system? What are its two main functions?
Without the operating system, a user interacting with the computer would need to know profoundly different details on hardware equipment, which would slow their work and introduce a great potential for error. The two main features are ease of access to system resources and resource sharing in an organized and protected manner.
2. Explain the concept of a virtual machine. What’
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Key Components of Android OS Architecture
- Linux Kernel: The foundation of the Android OS, it provides core system services such as security, memory management, process management, and hardware abstraction. It interacts directly with the hardware and manages device drivers.
- Hardware Abstraction Layer (HAL): This layer provides a standard interface for hardware components, allowing the Android framework to communicate with the hardware without needing to know the specifics of the hardware implementation.
Python Data Structures, Modules, File Handling, and More
Mutable and Immutable Data Structures
Ans: Data types in Python are divided into two categories:
- Immutable data types: Values cannot be changed.
- Numbers
- String
- Tuple
- Mutable data types: Values can be changed.
- List
- Dictionaries
- Sets
1. Numbers
Python supports integers, floats, and complex numbers. An integer is a number without a decimal point, for example, 5, 6, 10, etc. A float is a number with a decimal point, for example, 6.7, 6.0, 10.99, etc. A complex number has a real and imaginary part, for example,
Read MoreCybersecurity Threats and Defense Strategies: A Comprehensive Analysis
DoS and DDoS Attacks: Understanding the Difference
Denial of Service (DoS) attacks involve a single source flooding a target with traffic to overwhelm it and make its services unavailable. Distributed Denial of Service (DDoS) attacks are similar but use multiple sources, often a botnet of compromised devices, making them more challenging to stop. Both attacks aim to disrupt the target’s ability to respond to legitimate traffic.
Types of DoS and DDoS Attacks
There are three main types of DoS and DDoS
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Definition of Serial Communication
In telecommunications and computing, serial communication is the process of sequentially sending data one bit at a time over a communication channel or computer bus. This contrasts with parallel communication, where all the bits of each symbol (the smallest unit of data transmitted at a time) are sent together.
Serial communication is used in almost all communications and computer networks because the costs of cables and the difficulties of synchronizing parallel
Read MoreJava Development: Key Concepts and Best Practices
ArrayList vs. TreeSet
When are the differences between an ArrayList and a TreeSet?
A: An ArrayList allows duplicate elements and maintains the insertion order, while a TreeSet does not allow duplicate elements and does not maintain the insertion order.
Object-Relational Mapping (ORM)
Explain what Object-Relational Mapping is.
A: It is a sophisticated mechanism for mapping Java objects in memory to tables in a relational database. It allows you to persist objects, enables complex queries, and each instance
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