🚀 Generative AI Interview Questions with Answers (Part 9)
4️⃣1️⃣ What are Query, Key, and Value (Q, K, V) in Attention?
👉 In the attention mechanism, each token is transformed into three vectors:
🔹 Query (Q) → What information am I looking for?
🔹 Key (K) → What information do I contain?
🔹 Value (V) → What information should I provide?
A simplified attention calculation is:

Attention(Q, K, V)
= softmax(QKᵀ / √dₖ)V

💡 Q, K, and V help the model determine which tokens should receive more attention.
4️⃣2️⃣ What are Logits in an LLM?
👉 Logits are the raw numerical scores produced by a model before they are converted into probabilities.
📌 Simplified flow:

Input
 ↓
LLM
 ↓
Logits
 ↓
Softmax
 ↓
Probabilities
 ↓
Next Token

💡 Higher relative logits generally correspond to higher probabilities after softmax.
4️⃣3️⃣ What is Softmax in AI?
👉 Softmax converts a set of numerical scores into a probability distribution.
For example:

Logits
 ↓
Softmax
 ↓
Token A → 0.70
Token B → 0.20
Token C → 0.10

📌 The probabilities sum to approximately 1.
💡 Softmax is commonly used for converting model scores into probabilities over possible classes or tokens.
4️⃣4️⃣ What is Greedy Decoding?
👉 Greedy decoding selects the highest-probability token at each generation step.
Example:

Token probabilities

A → 0.70
B → 0.20
C → 0.10

Selected → A

📌 It is simple and deterministic for a fixed model/input, but it may not always produce the most desirable overall sequence.
4️⃣5️⃣ What is Sampling in Generative AI?
👉 Sampling selects the next token probabilistically from a distribution rather than always choosing the highest-probability token.
Common decoding controls include:
🔹 Temperature
🔹 Top-P
🔹 Top-K
📌 Sampling can produce more varied outputs than greedy decoding.
💡 The exact behavior depends on the model and decoding settings.
💬 Save this for your Generative AI interview preparation!
🔥 Next: Java Interview Questions – Part 3
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☕️ Java Interview Questions with Answers (Part 3)
1️⃣1️⃣ What is Method Overloading in Java?
👉 Method Overloading means having multiple methods with the same name but different parameter lists in the same class.

class Calculator {
    int add(int a, int b) {
        return a + b;
    }

    double add(double a, double b) {
        return a + b;
    }
}

💡 Overloading is resolved at compile time.
1️⃣2️⃣ What is Method Overriding in Java?
👉 Method Overriding occurs when a subclass provides its own implementation of an inherited method.

class Animal {
    void sound() {
        System.out.println("Animal sound");
    }
}

class Dog extends Animal {
    @Override
    void sound() {
        System.out.println("Bark");
    }
}

💡 Overriding is associated with runtime polymorphism.
1️⃣3️⃣ What is the this Keyword in Java?
👉 this refers to the current object.
It is commonly used to:
🔹 Access current object's fields
🔹 Call current class methods
🔹 Invoke another constructor
Example:

class Student {
    String name;

    Student(String name) {
        this.name = name;
    }
}

1️⃣4️⃣ What is the super Keyword in Java?
👉 super refers to the immediate parent class.
It can be used to:
🔹 Access parent fields
🔹 Call parent methods
🔹 Call the parent constructor
Example:

class Animal {
    String name = "Animal";
}

class Dog extends Animal {
    String name = "Dog";

    void display() {
        System.out.println(super.name);
    }
}

📌 Output:

Animal

1️⃣5️⃣ What is the static Keyword in Java?
👉 static indicates that a member belongs to the class rather than a particular object.
Example:

class Counter {
    static int count = 0;

    Counter() {
        count++;
    }
}

public class Main {
    public static void main(String[] args) {
        new Counter();
        new Counter();

        System.out.println(Counter.count);
    }
}

📌 Output:

2

💡 A static field is shared among instances of the class.
💬 Save this for your Java interview preparation!
🔥 Next: Python Interview Questions – Part 2
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