Showing 101–120 of 603

Q101.In a machine learning confusion matrix, what does a 'False Positive' represent?

Easy
A Incorrectly predicted positive (Type I error)
B Correctly predicted positive
C Incorrectly predicted negative (Type II error)
D Correctly predicted negative
Common Technical Terms PPSC

Correct Answer: A

A False Positive occurs when a model incorrectly flags a negative case as positive (e.g., classifying a healthy patient as sick).

Q102.What does 'overfitting' in machine learning mean?

Easy
A The model performs well on training data but poorly on new data
B The model cannot be trained at all
C The model performs poorly on training data
D The model has too little data to learn
Common Technical Terms PPSC

Correct Answer: A

Overfitting occurs when a model learns the noise and details of the training data too well, failing to generalize to unseen test datasets.

Q103.What is the primary purpose of the backpropagation algorithm?

Easy
A Data cleaning
B Updating weights to reduce prediction errors
C Sorting data
D Image capturing
Programming Basics PPSC

Correct Answer: B

Backpropagation computes gradients of the loss function and updates neural network weights to minimize errors.

Q104.Which of the following is a popular generative AI model for synthesizing images from text?

Easy
A YOLO
B ResNet
C BERT
D DALL•E
Common Technical Terms PPSC

Correct Answer: D

DALL·E is OpenAI's generative model designed to synthesize creative, original images from natural language descriptions.

Q105.What is a 'hyperparameter' in machine learning?

Easy
A An output label
B A learned weight
C A type of dataset
D A configuration setting set before training begins
Common Technical Terms PPSC

Correct Answer: D

Hyperparameters are external settings (like learning rate or batch size) configured by engineers before model training.

Q106.Which deep learning technique helps reduce overfitting by randomly disabling neurons during training?

Easy
A Pooling
B Dropout
C Stride
D Padding
Common Technical Terms PPSC

Correct Answer: B

Dropout randomly deactivates a fraction of neurons during each training step, preventing co-adaptation and improving generalization.

Q107.Depth-First Search (DFS) typically uses which data structure?

Easy
A Queue
B Hash table
C Stack
D Heap
Database Basics PPSC

Correct Answer: C

DFS uses a Stack (or function call stack via recursion) to explore deeply down a branch before backtracking.

Q108.What does 'epoch' mean in neural network training?

Easy
A One complete pass of the entire training dataset through the network
B One individual neuron
C One single weight update
D One hidden layer
Common Technical Terms PPSC

Correct Answer: A

An epoch represents one full training cycle where the complete training dataset has been passed forward and backward through the network once.

Q109.Which AI subfield enables machines to make decisions by applying rules like human experts?

Easy
A Computer Vision
B Data Mining
C Robotics
D Expert Systems
Common Technical Terms PPSC

Correct Answer: D

Expert Systems represent a classic AI field that mimics the logical decision-making of human domain experts using predefined rule bases.

Q110.Which type of neural network is best suited for sequential, temporal, or time-series data?

Easy
A RNN
B GAN
C SVM
D CNN
Common Technical Terms PPSC

Correct Answer: A

Recurrent Neural Networks (RNNs) feature internal memory loops, making them ideal for processing sequence data like text and time-series.

Q111.What is the vanishing gradient problem associated with?

Easy
A Gradients becoming too small in deep neural networks during backpropagation
B Having too much training data
C Overfitting on small datasets
D Faster model training
Common Technical Terms PPSC

Correct Answer: A

Vanishing gradients occur when error signals shrink exponentially as they propagate backward through deep networks, stopping early layers from learning.

Q112.Which technique generates new realistic data by setting two neural networks in competition?

Easy
A GAN
B RNN
C CNN
D KNN
Common Technical Terms PPSC

Correct Answer: A

Generative Adversarial Networks (GANs) utilize a generator (creating fakes) and a discriminator (checking authenticity) in a game-theoretic competition.

Q113.What is 'transfer learning' in machine learning?

Easy
A Deleting model weights
B Moving files between hard disks
C Reusing a pre-trained model as a starting point for a related new task
D Encrypting models
Common Technical Terms PPSC

Correct Answer: C

Transfer learning leverages knowledge learned from training on a massive dataset to accelerate learning on a new, related task.

Q114.What does the term 'feature' mean in machine learning?

Easy
A A loss value
B An output label
C An individual measurable property or variable of a phenomenon
D A hidden layer
Programming Basics PPSC

Correct Answer: C

A feature is an explanatory variable or individual input column used by machine learning models to make predictions.

Q115.Which AI large language model family powers Anthropic's chatbot?

Easy
A Gemini
B Claude
C Grok
D Copilot
Common Technical Terms PPSC

Correct Answer: B

Claude is Anthropic's flagship family of highly advanced large language models.

Q116.Which machine learning algorithm is a supervised classification method based on finding optimal separating hyperplanes?

Easy
A Support Vector Machine
B K-Means
C Apriori
D DBSCAN
Programming Basics PPSC

Correct Answer: A

Support Vector Machine (SVM) is a supervised algorithm that searches for the optimal hyperplane maximizing the margins between classes.

Q117.What is the role of the 'learning rate' in training deep neural networks?

Easy
A Counts hidden neurons
B Measures final accuracy
C Stores model data
D Controls the step size of weight updates during optimization
Common Technical Terms PPSC

Correct Answer: D

The learning rate is a critical hyperparameter that dictates the step size taken by the optimization algorithm (like SGD) toward a minimum loss.

Q118.In digital forensics, AI is primarily used to?

Easy
A Cook food
B Analyze and process large volumes of digital evidence quickly
C Print case documents
D Build server hardware
Common Technical Terms PPSC

Correct Answer: B

AI systems assist forensic investigators by quickly searching, categorizing, and filtering through massive sets of hard drive or chat log evidence.

Q119.Which AI application is commonly used to detect fraudulent financial transactions?

Easy
A Anomaly detection
B Image rotation
C Text printing
D File zipping
Common Technical Terms PPSC

Correct Answer: A

Anomaly detection models scan transactions to identify outliers or unusual patterns that deviate from normal user behavior, flagging potential fraud.

Q120.What does 'inference' mean in a deployed AI model?

Easy
A Training the model
B Labeling training data
C Cleaning datasets
D Making predictions on new, unseen data using a trained model
Common Technical Terms PPSC

Correct Answer: D

Inference is the phase where a fully trained machine learning model is deployed to run and calculate predictions on real-world inputs.