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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Discrete Mathematics & Logic | 25% | - Propositional and predicate logic - Boolean algebra and digital logic - Proof techniques and mathematical induction - Set theory, relations, functions |
| Topic 2: Computer Architecture & Organization | 15% | - Von Neumann architecture - Memory hierarchy and performance - Instruction sets and execution cycles - CPU, memory, I/O systems |
| Topic 3: Software Engineering & Programming Basics | 15% | - Testing and debugging fundamentals - Basic syntax and control structures - Software development lifecycle - Programming paradigms |
| Topic 4: Algorithms & Complexity | 25% | - Sorting and searching algorithms - Algorithm design and analysis - Big O notation, time and space complexity - Recursion and iterative structures |
| Topic 5: Data Structures | 20% | - Data storage and retrieval principles - Arrays, linked lists, stacks, queues - Primitive and composite data types - Trees, graphs, hash tables |
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NEW QUESTION # 36
What is the purpose of the pointer element of each node in a linked list?
Answer: B
Explanation:
In a singly linked list, each node is a small record that typically contains two main parts: a data field and a pointer field. The data field stores the actual value being kept in the list. The pointer field stores the address or reference of another node. The pointer element's purpose is to connect one node to the next by indicating where the next node is located in memory. This is essential because linked-list nodes are not stored in contiguous memory locations the way array elements are. Nodes may exist anywhere in memory, and the pointer is what preserves the logical sequence of the list.
This design supports efficient structural changes. For traversal, a program starts at the head node and repeatedly follows the pointer to reach subsequent nodes. For insertion, a new node can be added by adjusting a small number of pointers instead of shifting many elements, as would be required in an array. For deletion, the list can "skip over" a node by updating the pointer in the previous node to reference the node after the removed one. The end of the list is typically represented by a null pointer value, signaling there is no next node.
Keeping track of list size or current position is not the responsibility of each node's pointer field; these are usually handled by separate variables or computed during traversal.
NEW QUESTION # 37
How can a user subset a NumPy array bmi to only include values over 23?
Answer: B
Explanation:
NumPy supports a powerful technique calledBoolean indexing(also called Boolean masking) to filter arrays based on a condition. When you write bmi > 23, NumPy performs an element-wise comparison and produces a Boolean array of the same shape, containing True where the condition holds and False otherwise. Using that Boolean array inside square brackets, as in bmi[bmi > 23], tells NumPy to return a new 1D array containing only the elements whose mask value is True. This approach is heavily emphasized in scientific computing curricula because it expresses selection logic without explicit loops and runs efficiently in optimized compiled code.
Option B looks close but is not standard NumPy usage. The function commonly used is np.where(condition) or np.where(condition, x, y). While np.where(bmi > 23) can return indices, bmi.where(...) is not a NumPy array method; it is more associated with pandas objects. Options A and C are not valid NumPy APIs for filtering.
Boolean indexing is central in data analysis tasks such as removing invalid measurements, selecting a population subgroup, applying thresholds, and building feature subsets. It composes cleanly with vectorized computation, for example bmi[bmi > 23].mean(), enabling concise and high-performance numerical workflows.
NEW QUESTION # 38
What is another term for the inputs into a function?
Answer: A
Explanation:
In programming, a function takes inputs, performs computation, and may return an output. The standard term for a function's inputs isarguments(also commonly discussed alongside the closely related termparameters).
Textbooks typically distinguish the two:parametersare the names listed in the function definition, while argumentsare the actual values supplied when the function is called. For example, in def f(x, y):, x and y are parameters. In the call f(3, 5), 3 and 5 are arguments. Many introductory materials use "arguments" informally to refer to the inputs overall, which matches the wording of this question.
Options A, B, and C do not fit the textbook definition. "Variables" is too broad; inputs can be literals, expressions, or variables, but the conceptual role is "arguments." "Procedures" are callable units of code (often used in some languages to mean functions without return values), not the inputs. "Outputs" refers to returned results, not what you pass in.
Understanding arguments is important because it connects to call semantics, scope, and correctness.
Different languages support positional arguments, keyword arguments, default values, and variadic arguments (e.g., *args, **kwargs in Python). This flexibility shapes API design and influences how programmers structure reusable code.
NEW QUESTION # 39
Which order is impossible when traversing a binary tree using depth first search?
Answer: D
Explanation:
Depth-first search (DFS) explores a tree by going as deep as possible along a branch before backtracking. In binary trees, DFS gives rise to the classic traversal orderspre-order,in-order, andpost-order, each defined by when you "visit" the node relative to its left and right subtrees. Pre-order visits the node first, then left subtree, then right subtree. In-order visits left subtree, then the node, then right subtree. Post-order visits left subtree, then right subtree, then the node. These are all DFS-based because they fully explore subtrees before moving sideways to another branch.
Level-order traversalis different: it visits nodes layer by layer from the root outward (all nodes at depth 0, then depth 1, then depth 2, etc.). This is a hallmark ofbreadth-first search (BFS), not DFS. Textbooks emphasize this distinction because DFS and BFS have different properties: BFS naturally finds shortest paths in unweighted graphs and produces level-order traversal in trees, while DFS is useful for tasks like topological sorting, cycle detection, and exploring structure recursively.
Therefore, the traversal order that is impossible to produce as a depth-first traversal of a binary tree is level-order traversal. The DFS orders (pre-, in-, post-) are all achievable by depth-first strategies, typically implemented recursively or with an explicit stack.
NEW QUESTION # 40
Which file system is commonly used in Windows and supports file permissions?
Answer: A
Explanation:
Windows commonly uses the NTFS (New Technology File System) for internal drives and many external drives because it supports advanced features required for modern operating systems. One of the most important features is support forfile and folder permissionsvia Access Control Lists (ACLs). Permissions enable the OS to enforce security policies by controlling which users and groups can read, write, execute, modify, or delete specific resources. This is fundamental to multi-user security and is a standard topic in operating systems and security textbooks.
FAT32 is an older file system designed for simplicity and broad compatibility. It does not provide the same fine-grained permission model as NTFS, which is why it is often used for removable media where cross- platform compatibility matters more than access control. HFS+ is historically associated with Apple's macOS systems, and EXT4 is widely used on Linux. While these file systems have their own permission and feature models, they are not the common Windows default for permission-managed storage in typical Windows deployments.
NTFS also supports journaling (improving reliability after crashes), large file sizes, quotas, compression, and encryption features (through Windows facilities). In enterprise environments, NTFS permissions integrate with Windows authentication and directory services, enabling centralized user management. Therefore, for Windows systems requiring file permissions, NTFS is the correct answer.
NEW QUESTION # 41
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