Deep Learning Interview Questions

It’s safe to say that deep learning (DL) is the method that most closely resembles how humans learn. As artificial intelligence (AI) grows in importance, new jobs are being generated in various fields.

One of the most sought-after skills of our century is deep learning. Speech recognition, computer vision, and natural language processing can all benefit from neural networks. If you’re interested in the field and want to learn more, check out the best Deep Learning course. The following deep learning interview questions can help you land a new job in this industry.

Why Deep Learning?

In the 21st century, deep learning is one of the fastest-growing IT fields. Skills and technology that allow machines to forecast outputs from multilayer input sets are called “predictive” in this context. Working with it necessitated a thorough understanding of the subject matter and much time and effort on the user’s part. Deep learning has grown tremendously in the last three to four years.

DL interview questions for freshers:

Q1). What exactly is Deep Learning?

Ans) Deep learning, as a machine learning paradigm, has recently shown great promise. Because deep learning is so similar to the human brain’s functioning, it is the primary reason. The human brain is superior and dynamic, and it is unquestionably the most effective model of learning that has ever been. The ability of deep learning to extract useful information from large datasets makes it unique.

Q2). What do you know about Neural Networks?

Ans) Neural networks replicate human learning processes. Neurons in our brains act in a similar way to how they work. There are three layers in the most common neural network: Input, Hidden, and Output.

Q3). What are the significant differences between AI, ML, and DL?


  1. Artificial intelligence is referred to as AI. Machines may imitate human actions using this method.
  2. Machine Learning, a subset of AI, uses statistical approaches to enable machines to learn from their own experiences.
  3. It is possible to compute multilayer neural networks with the help of deep learning, which is a part of machine learning. It mimics human decision-making by utilizing neural networks.

Q4). Name a few deep learning frameworks or technologies available?

Ans) Deep learning frameworks or tools are Tensorflow, Keras, Chainer, Pytorch, Caffe2, DyNetGensim, DSSTNE, Paddle, and BigDL.

Q5). Is there a downside to deep learning?

Ans) Deep learning has various drawbacks, such as:

  • It takes longer to run the model in a deep learning model.
  • Depending on the model’s complexity, it can take days or even weeks to run.

Q6). In your opinion, what does the term “Perceptron” mean?

Ans) Like a human brain neuron, perceptrons receive and collect inputs from many sources and apply or provide information to those who transform them into a result. A binary classifier is a type of algorithm that is most commonly used for supervised learning. Use this approach in RNN, GAN, and many other types of neural networks.

DL interview questions for experienced:

Q1). What is the Boltzmann Machine?

Ans) In deep learning, the Boltzmann machine is a simpler version of a Multilayer Perceptron. The two-layer neural net in this model has a hidden layer and a visible input layer. It uses stochastic judgments to determine whether a neuron should be on or off.

Q2). Why do you need a confusion matrix?

Ans) A confusion matrix is a method for visualizing supervised learning performance. Each column shows the number of predictions for each class. At the same time, each row represents the instances in the actual class, allowing us to assess our model’s successes and failures when learning from data. The confusion matrix will enable us to see how much the algorithm misclassifies classes.

Q3). How can we avoid overfitting?

Ans) Several approaches can be used to prevent overfitting:

  • Cross-validation: Splitting the initial training data into many mini-test sets and tuning the model each time.
  • Remove features: Feature selection heuristics manually determine the most relevant characteristics by removing extraneous ones from algorithms.
  • Regularization: To reduce the risk of ambiguity, you must make your model as simple as possible. There is little space for error. You can accomplish it by adding penalty parameters and pruning your decision tree.
  • Ensembling: For merging numerous predictions, these are machine learning approaches. Bagging and boosting are the most common assembling techniques.

Q4). What is the significance of a dropout or a batch nomination?


  • Dropout: Dropout is a method for preventing the overfitting of data by randomly removing visible and hidden network units. When converging a network, the number of iterations required doubles.
  • Batch Normalization: An improvement in neural network performance and stability can be achieved by normalizing the inputs in every layer. The mean output activation and standard deviation are equal.

Q5). What is an auto-encoder, exactly?

Ans) In the Neural Network, there are three layers in which the input neurons are equivalent to the output neurons. The outside network’s goal is the same as the input’s purpose. The input is restructured by reducing its dimensions. The output is then reconstructed from the compressed picture input and returned using this hidden space representation.

Q6). Explain the Boltzmann Machine?

Ans) Boltzmann Machines are employed to find the best solution to a given issue. The Boltzmann machine’s primary function is to find the optimal weight and amount for a given situation.

To summarize, it has a few crucial features.

  • It has a repeating structure.
  • It has stochastic neuronal units in one of only two possible states: either 1 or 0.
  • Both adaptive (free) and clamped neuronal states can be found here (frozen state).
  • It is possible to simulate annealing in the context of a discrete Hopfield network.

To advance in an interview, one must prepare well for Deep Learning’s employment opportunities. Preparation is vital, so don’t worry; everything will go your way. You can also search in Google to get more questions like this. Although deep learning is still in its infancy, there is already much demand for it. So, getting involved right now is the best course of action.

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