CSE Basic Preparation

Hello everyone. Today we know about different types of complexity.
Ques. Define Big O, Omega, and Theta notations. Give examples.
Ans.
Big O (O): Worst-case complexity (Upper bound)
Omega (Ω): Best-case complexity (Lower bound)
Theta (Θ): Average-case complexity (Tight bound)

Example: For linear search:

O(n), Ω(1), Θ(n)

Hello everyone. How are you all?
Do you know the difference between RAM and ROM?
RAM ROM
1.Volatile 1. Non-volatile
2.Temporary storage 2. Permanent storage
3.Fast 3. Slow

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Assalamualikum everyone.
Do you know the difference between supervised and unsupervised learning?
Answer:
Feature Supervised Learning Unsupervised Learning
Labeled Data Uses labeled data No labels used
Goal Predict output Find hidden patterns
Example Classification, Regression Clustering (K-means, PCA)

Very important hacks.

Assalamualaikum everyone. Hope all are fine.
Do you know about Deadlock? Which are Operating Systems important topics.

Q: What is a deadlock? Name four necessary conditions.

Answer: Deadlock is a state where processes are stuck waiting for each other.

Conditions:

1. Mutual exclusion,

2. Hold and wait,

3. No preemption,

4. Circular wait.

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Assalamualaikum everyone. How are you all?
Do you know what are the phases of the Software Development Life Cycle (SDLC)?

Ans: The phases are

1. Requirement Analysis

2. System Design

3. Implementation (Coding)

4. Testing

5. Deployment

6. Maintenance.

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Hello everyone. How are you all.

Let's know about Object-Oriented Programming Core Concept.

Encapsulation: Wrapping data & methods in class.

Inheritance: Deriving a new class from an existing class.

Polymorphism: Same function behaves differently (overloading, overriding).

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Do you know about OSI Model?

Ans: The OSI Model have 7 Layers.

1. Physical Layer.

2. Data Link Layer.

3. Network Layer.

4. Transport Layer.

5. Session Layer.

6. Presentation Layer.

7. Application Layer.

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Holy Ramadan Mubarak to all.
Hello everyone. How are you all?

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