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| Section | Weight | Objectives |
|---|---|---|
| Algorithms & Complexity | 25% | - Sorting and searching algorithms - Big O notation, time and space complexity - Recursion and iterative structures - Algorithm design and analysis |
| Data Structures | 20% | - Primitive and composite data types - Data storage and retrieval principles - Trees, graphs, hash tables - Arrays, linked lists, stacks, queues |
| Software Engineering & Programming Basics | 15% | - Testing and debugging fundamentals - Basic syntax and control structures - Software development lifecycle - Programming paradigms |
| Discrete Mathematics & Logic | 25% | - Proof techniques and mathematical induction - Set theory, relations, functions - Propositional and predicate logic - Boolean algebra and digital logic |
| Computer Architecture & Organization | 15% | - CPU, memory, I/O systems - Von Neumann architecture - Instruction sets and execution cycles - Memory hierarchy and performance |
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NEW QUESTION # 68
Which is the most powerful command line interface on Windows systems?
Answer: C
Explanation:
On Windows,PowerShellis generally regarded as the most powerful command-line environment because it is both a shell and a scripting language designed for system administration and automation. Traditional Command Promptfocuses on running console commands and batch files with plain-text input and output.
PowerShell, by contrast, uses an object-oriented pipeline: commands (calledcmdlets) output structured objects rather than raw text. This enables more reliable scripting and data manipulation, since you can filter, sort, and transform results without fragile text parsing.
Textbooks covering operating systems and administration emphasize automation and management at scale.
PowerShell integrates tightly with Windows management technologies, such as WMI/CIM, the registry, services, event logs, and Active Directory environments. It also supports remote management, scripting modules, robust error handling, and modern security features. This makes it particularly suitable for tasks like provisioning users, configuring machines, auditing systems, and orchestrating deployments.
The other options are not command-line interfaces in the same sense. Task Manager is a GUI tool for viewing processes and performance. Control Panel is also GUI-based for system configuration. Command Prompt is a command line interface, but it is less capable for complex administration compared to PowerShell's scripting and object pipeline.
Therefore, from a computer science and systems perspective, PowerShell is the most powerful Windows CLI environment among the choices.
NEW QUESTION # 69
What is the expected output of calling .shape on a NumPy 2D array?
Answer: C
Explanation:
In NumPy, every ndarray has a shape attribute that describes the size of the array along each dimension. For a
2D array, shape returns a tuple with two integers: (number_of_rows, number_of_columns). For example, if a
= np.array([[1, 2, 3], [4, 5, 6]]), then a.shape is (2, 3), meaning 2 rows and 3 columns. This is a fundamental idea in matrix and array computing, because shape governs how indexing, slicing, broadcasting, and linear algebra operations behave.
Option A describes the dtype, which can be accessed with a.dtype, not a.shape. Option C is incorrect because shape provides per-dimension sizes, not their sum. Option D refers to the total number of elements, which NumPy provides via a.size (or equivalently np.prod(a.shape)).
Textbooks emphasize shape because many errors in numerical computing come from mismatched dimensions. For example, matrix multiplication requires compatible inner dimensions, and broadcasting rules depend on dimension sizes. By checking .shape, programmers can verify their data layout before applying algorithms, ensuring rows represent observations and columns represent features (or vice versa). Thus, for a 2D NumPy array, .shape indicates the number of rows and columns.
NEW QUESTION # 70
Which type of data structure is the only focus of a binary search?
Answer: D
Explanation:
Binary search is designed for searching in asorted (ordered) sequence. Its efficiency comes from repeatedly comparing the target to the middle element and discarding half of the remaining search space. This halving logic only works when the data is ordered, because the algorithm relies on the guarantee that all elements on one side of the midpoint are smaller (or larger) than the midpoint. In textbooks, this requirement is stated explicitly: binary search assumes the collection is sorted according to the same ordering used for comparisons.
An "ordered list" is therefore the correct focus among the options. Binary search can be implemented on arrays or other random-access structures where you can quickly access the middle element by index. While you can conceptually perform binary search on a linked list, it becomes inefficient because finding the middle requires linear traversal, losing the O(log n) advantage. Stacks and queues are not appropriate because they restrict access to ends only (LIFO for stacks, FIFO for queues), preventing direct access to the midpoint and making the binary search strategy infeasible.
Thus, the central requirement for binary search is a sorted/ordered sequence, typically supporting efficient indexing, which is why the correct choice is an ordered list.
NEW QUESTION # 71
Which process is designed to establish the identity of the user such as with a username and password?
Answer: B
Explanation:
Authenticationis the security process of proving or establishing a user's identity. In textbook terminology, authentication answers the question: "Who are you?" Common authentication factors include something you know (password, PIN), something you have (smart card, hardware token), and something you are (biometrics). Username and password is the classic "something you know" mechanism, where the username identifies the account and the password serves as a secret used to validate that the user is the rightful owner of that account.
Authentication is distinct fromauthorization, which determines what an authenticated user is allowed to do (permissions, roles). It is also distinct from registration, which is the administrative act of creating an account or enrolling a user in a system. "Verification" is a general term that can appear in many contexts, but in security frameworks the precise term for identity establishment is authentication. "Certification" usually refers to issuing or validating credentials such as digital certificates (PKI) or professional certifications, not the act of logging in with a password.
Textbooks emphasize that authentication should be strengthened with practices like hashing and salting passwords, multi-factor authentication (MFA), lockout policies, and secure transport (e.g., TLS) to prevent credential theft. The core concept remains: the process that establishes identity using credentials like a username and password is authentication.
NEW QUESTION # 72
Which character is used to indicate a range of values to be sliced into a new list?
Answer: B
Explanation:
In Python, slicing is the standard mechanism for extracting arangeof elements from a sequence type such as a list, string, or tuple. The character that signals a slice range is thecolon:. The general slice syntax is sequence
[start:stop:step]. Most commonly, you see sequence[start:stop], where start is the index to begin from (inclusive) and stop is the index to end at (exclusive). This "inclusive start, exclusive stop" rule is emphasized in textbooks because it makes slice lengths easy to reason about: when step is 1, the number of elements returned is stop - start.
For example, if items = ["a", "b", "c", "d", "e"], then items[1:4] returns ["b", "c", "d"]. Omitting start defaults to the beginning (items[:3] gives the first three elements), and omitting stop defaults to the end (items[2:] gives everything from index 2 onward). The optional step supports patterns like items[::2] for every other element, and negative steps can reverse a sequence (items[::-1]).
The other characters do not define ranges in Python slicing: , separates items (or indices in multidimensional structures), + is addition/concatenation, and = is assignment. The colon is the slicing operator that indicates a range.
NEW QUESTION # 73
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