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| Section | Weight | Objectives |
|---|---|---|
| Discrete Mathematics & Logic | 25% | - Proof techniques and mathematical induction - Set theory, relations, functions - Boolean algebra and digital logic - Propositional and predicate logic |
| Software Engineering & Programming Basics | 15% | - Testing and debugging fundamentals - Programming paradigms - Basic syntax and control structures - Software development lifecycle |
| Algorithms & Complexity | 25% | - Sorting and searching algorithms - Algorithm design and analysis - Big O notation, time and space complexity - Recursion and iterative structures |
| Data Structures | 20% | - Primitive and composite data types - Data storage and retrieval principles - Trees, graphs, hash tables - Arrays, linked lists, stacks, queues |
| Computer Architecture & Organization | 15% | - Von Neumann architecture - CPU, memory, I/O systems - Memory hierarchy and performance - Instruction sets and execution cycles |
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NEW QUESTION # 23
The np_2d array stores information about multiple family members. Each row represents a different person, and the columns store family member attributes in the following order:
Age (years)
Weight (pounds)
Height (inches)
How is the weight of all family members selected from the np_2d array?
Answer: C
Explanation:
In a 2D NumPy array, rows and columns represent different dimensions of the data. The indexing form array
[row_selection, column_selection] allows you to select entire rows, entire columns, or submatrices. The slice :
means "all indices along this dimension." Since each row corresponds to a family member (a person), selecting weights forallfamily members means selectingall rowsfor the weight column.
The problem states the columns are ordered as: Age (column 0), Weight (column 1), Height (column 2).
Therefore, the weight column has index 1. The expression np_2d[:, 1] uses : to take every row and 1 to take the second column, producing a 1D array (or a column view) containing the weight values for all people.
Option A, np_2d[:, 2], would select the height column, not weight. Option C, np_2d[2, :], selects the third row (the third person) and all columns-age, weight, and height for just that one person. Option D, np_2d[1, :], selects the second person's entire row.
This column selection technique is fundamental in data analysis because datasets are often stored as
"rows = observations, columns = features," and extracting a feature vector is a frequent operation before computing statistics or building models.
NEW QUESTION # 24
What is the first step in the selection sort algorithm?
Answer: C
Explanation:
Selection sort works by growing a sorted portion of the list one element at a time. The algorithm conceptually divides the array into two regions: asorted prefixon the left and anunsorted suffixon the right. At the beginning, the sorted prefix is empty and the entire list is unsorted. The first step is to consider position 0 as the target location for the smallest element. The algorithm scans the unsorted region (initially the whole list) to find the smallest valueand records its index. That action is exactly what option C describes: determine the lowest value starting from the first position.
After identifying the minimum element, selection sort swaps it into position 0 (if it isn't already there). Then it repeats the process for position 1, scanning the remaining unsorted suffix to find the next smallest element, swapping it into place, and so on. Textbooks emphasize that the key characteristic of selection sort is the repeated "select min (or max) from unsorted region and place it into the sorted region." Option A is not the standard first step; finding both min and max is unnecessary. Option B describes an unrelated swap that doesn't ensure progress toward sorting. Option D is not a "first step" but rather a different ordering goal; selection sort can be adapted for descending order, but the canonical version begins by selecting the minimum for the first position.
NEW QUESTION # 25
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 # 26
Which aspect of a security policy would define the ramifications of abusing company resources?
Answer: D
Explanation:
AnAcceptable Use Policy (AUP)defines how employees and users are permitted to use an organization's computing resources-such as email, internet access, file storage, endpoints, and networks-and it typically specifies prohibited behaviors and the consequences of violations. In security and IT governance textbooks, the AUP is framed as both a behavioral contract and a risk-management tool: it reduces misuse, clarifies expectations, and provides an enforceable basis for disciplinary action.
The "ramifications of abusing company resources" (for example, installing unauthorized software, excessive personal use, accessing inappropriate content, attempting to bypass security controls, or sharing credentials) are precisely the kinds of issues an AUP addresses. The policy often includes monitoring statements (users have limited expectation of privacy), compliance requirements, and escalation paths for violations.
A Network Security Policy (A) focuses on technical rules for network protection-firewalls, segmentation, remote access, and intrusion detection-rather than broad user conduct and disciplinary consequences. A Physical Security Policy (B) addresses protection of facilities and hardware-badges, locks, visitor procedures, secure areas. A Data Retention Policy (D) defines how long data is stored, how it is archived, and how it is disposed, which is different from defining misuse consequences.
Thus, the policy aspect that defines permissible behavior and the consequences for abusing resources is the Acceptable Use Policy.
NEW QUESTION # 27
Which method allows a user to convert a string value to all capital letters in Python?
Answer: B
Explanation:
In Python, strings are objects of type str, and the language provides many built-in string methods for common transformations. The standard method used to convert all alphabetic characters in a string to uppercase is upper(). For example, "Hello, World".upper() produces "HELLO, WORLD". This method is part of Python's core string API and is documented as returning anewstring because strings are immutable in Python; the original string is not modified.
Options A and D resemble methods from other programming languages. For instance, toUpperCase() is commonly seen in Java and JavaScript, not Python. Option B, makeUpper(), is not a standard method in Python's str type. Python's naming conventions for built-in methods are typically short and lowercase, which is consistent with upper(), lower(), strip(), and replace().
It is also important to note what upper() does and does not do. It affects letters according to Unicode case-mapping rules, so it works beyond ASCII and supports many languages. Non-alphabetic characters such as digits, punctuation, and whitespace remain unchanged. Because the method returns a new string, it supports functional-style programming and safe reuse of the original data. In many textbook examples, upper() is paired with input normalization tasks, such as case-insensitive comparisons and cleaning user-entered text.
NEW QUESTION # 28
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