Computer Science & IT

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Q. In a queue, which operation is performed to remove an element?
  • A. Push
  • B. Pop
  • C. Enqueue
  • D. Dequeue
Q. In a queue, which operation is used to remove an element?
  • A. Push
  • B. Pop
  • C. Enqueue
  • D. Dequeue
Q. In a Random Forest, what is the purpose of bootstrapping?
  • A. To reduce overfitting
  • B. To increase the number of features
  • C. To create multiple subsets of data for training
  • D. To improve model interpretability
Q. In a Random Forest, what is the purpose of using multiple Decision Trees?
  • A. To increase the model's complexity
  • B. To reduce overfitting and improve accuracy
  • C. To simplify the model
  • D. To ensure all trees are identical
Q. In a real-world application, SVM can be used for which of the following?
  • A. Image recognition
  • B. Time series forecasting
  • C. Clustering customer segments
  • D. Generating text
Q. In a real-world application, which of the following scenarios is best suited for linear regression?
  • A. Classifying emails as spam or not spam
  • B. Predicting house prices based on features like size and location
  • C. Segmenting customers into different groups
  • D. Identifying topics in a set of documents
Q. In a real-world application, which of the following scenarios is most suitable for linear regression?
  • A. Classifying emails as spam or not spam
  • B. Predicting house prices based on features like size and location
  • C. Segmenting customers into different groups
  • D. Identifying anomalies in network traffic
Q. In a recursive function, what is the purpose of the return statement?
  • A. To terminate the program
  • B. To return control to the caller
  • C. To call the function again
  • D. To print the output
Q. In a recursive implementation of binary search, what is the base case?
  • A. When the array is empty
  • B. When the target is found
  • C. When the left index exceeds the right index
  • D. When the mid index is zero
Q. In a Red-Black tree, what color can the root node be?
  • A. Red
  • B. Black
  • C. Either Red or Black
  • D. None of the above
Q. In a Red-Black tree, what color is the root node required to be?
  • A. Red
  • B. Black
  • C. Either red or black
  • D. None of the above
Q. In a Red-Black tree, what color is the root node?
  • A. Red
  • B. Black
  • C. Green
  • D. Blue
Q. In a Red-Black tree, what happens when a red node is inserted as a child of another red node?
  • A. The tree remains valid.
  • B. The tree is immediately balanced.
  • C. A recoloring and rotation may be needed.
  • D. The insertion is not allowed.
Q. In a Red-Black tree, what happens when a red node is inserted?
  • A. It is always the root.
  • B. It may cause a violation of Red-Black properties.
  • C. It is always a leaf.
  • D. It cannot be inserted.
Q. In a Red-Black tree, what is the maximum height of the tree in terms of the number of nodes n?
  • A. 2n
  • B. n
  • C. log(n)
  • D. 2 * log(n)
Q. In a Red-Black tree, what is the maximum number of black nodes on any path from the root to a leaf?
  • A. 1
  • B. 2
  • C. 3
  • D. It can vary.
Q. In a Red-Black tree, what must be true about the children of a red node?
  • A. They must be red.
  • B. They must be black.
  • C. They can be either color.
  • D. They must be leaf nodes.
Q. In a Red-Black Tree, what must be true about the path from any node to its descendant leaves?
  • A. All paths must have the same number of black nodes
  • B. All paths must have the same number of red nodes
  • C. All paths must alternate colors
  • D. All paths must have at least one red node
Q. In a Red-Black Tree, what must be true about the path from the root to any leaf?
  • A. All paths must have the same number of black nodes.
  • B. All paths must have the same number of red nodes.
  • C. All paths must have the same number of total nodes.
  • D. All paths must alternate colors.
Q. In a Red-Black tree, what property ensures that no two red nodes are adjacent?
  • A. Root property
  • B. Red property
  • C. Black property
  • D. Leaf property
Q. In a Red-Black tree, what property ensures that the tree remains approximately balanced?
  • A. Every node is either red or black
  • B. The root is always black
  • C. Every red node must have two black children
  • D. All leaves are black
Q. In a Red-Black tree, what property ensures that the tree remains balanced?
  • A. Every node has two children
  • B. The root is always black
  • C. No two red nodes can be adjacent
  • D. All leaves are at the same level
Q. In a Red-Black Tree, what property must be maintained after an insertion?
  • A. The tree must be a complete binary tree
  • B. The root must always be red
  • C. Every path from a node to its descendant leaves must have the same number of black nodes
  • D. All leaves must be red
Q. In a Red-Black tree, what property must be maintained after every insertion?
  • A. The tree must be complete.
  • B. The tree must be balanced.
  • C. The root must always be black.
  • D. All leaves must be red.
Q. In a regression case study, which metric would best evaluate the model's prediction error?
  • A. Confusion Matrix
  • B. R-squared
  • C. Precision
  • D. Recall
Q. In a regression problem, what does the R-squared value indicate?
  • A. The strength of the relationship between variables
  • B. The number of features used in the model
  • C. The accuracy of the classification
  • D. The error rate of the predictions
Q. In a regression problem, what does the term 'overfitting' refer to?
  • A. The model performs well on training data but poorly on unseen data
  • B. The model is too simple to capture the underlying trend
  • C. The model has too few features
  • D. The model is perfectly accurate
Q. In a singly linked list, how can you find the middle element in one pass?
  • A. Use two pointers
  • B. Count nodes first
  • C. Use recursion
  • D. Use a stack
Q. In a singly linked list, how do you access the last element?
  • A. Direct access
  • B. Iterate from the head
  • C. Use a tail pointer
  • D. Access via index
Q. In a singly linked list, how do you delete a node given only access to that node?
  • A. Set the node to null
  • B. Copy the next node's data
  • C. Change the previous node's pointer
  • D. You cannot delete it
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