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Security Measures to Maintain Law and Order QUESTION #959

Question 1881

What is the importance of 'Inter-Agency Coordination'?

To compete with other departments
To ensure a seamless response to threats✔️
To reduce the number of staff
To share a single office

Correct Answer Logic:

ASF must work with Police, Customs, and Airlines to provide a unified security front.

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Electronics Engineering QUESTION #11744

Question 1882

A DMM on resistance range is connected to a powered circuit (even a low-voltage one). The consequence is:

The circuit provides reference current improving measurement accuracy
Possible damage to the DMM's internal reference resistors and false readings✔️
The DMM auto-ranges to the current mode safely
No effect — modern DMMs are protected against up to 1000 V on all ranges

Correct Answer Logic:

A DMM in resistance mode applies its own internal current source (~0.5–1 mA) through the internal reference resistors. Applying external voltage while in resistance mode causes excessive current through the precision resistor network, producing false readings and permanent damage to internal components. Always de-energise and discharge circuits before resistance measurements.

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Mathematics QUESTION #4158

Question 1883

For the Laplace equation $u_{xx} + u_{yy} = 0$ on $0 < x < a$, $0 < y < b$ with $u(0,y) = u(a,y) = u(x,0) = 0$ and $u(x,b) = f(x)$, what is the general form of solution using separation of variables?

$u(x,y) = \sum_{n=1}^{\infty} B_n \sin(\frac{n\pi x}{a})\sinh(\frac{n\pi y}{a})$✔️
$u(x,y) = \sum_{n=1}^{\infty} B_n \cos(\frac{n\pi x}{a})\cosh(\frac{n\pi y}{a})$
$u(x,y) = \sum_{n=1}^{\infty} B_n \sin(\frac{n\pi x}{a})\cos(\frac{n\pi y}{b})$
$u(x,y) = \sum_{n=1}^{\infty} B_n e^{\frac{n\pi x}{a}}\sin(\frac{n\pi y}{b})$

Correct Answer Logic:

Boundary conditions $u(0,y) = u(a,y) = 0$ suggest $X(x) = \sin(\frac{n\pi x}{a})$. Condition $u(x,0) = 0$ gives $Y(0) = 0$, so $Y(y) = \sinh(\frac{n\pi y}{a})$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3298

Question 1884

'IgE' antibodies are primarily involved in which physiological process?

Blood clotting
Allergic reactions and parasite defense✔️
Digestion
Oxygen transport

Correct Answer Logic:

IgE binds to mast cells and triggers the release of histamine.

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Constitutional Law QUESTION #5815

Question 1885

A city ordinance prohibits the display of any sign that 'tends to incite a breach of the peace' or 'causes offense to members of a protected class.' A protester is arrested for holding a sign that says 'All Politicians are Thieves.' Is the ordinance constitutional?

Yes, because the city has a compelling interest in preventing breaches of the peace.
Yes, because the sign constitutes 'fighting words.'
No, because the ordinance is overbroad and vague.✔️
No, because political speech is subject to the highest level of protection.

Correct Answer Logic:

The ordinance is likely unconstitutional for vagueness (what 'causes offense' is subjective) and overbreadth (it could prohibit a vast amount of protected speech). 'Fighting words' must be face-to-face insults likely to provoke an immediate violent response, not general political statements.

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Library Sciences QUESTION #1557

Question 1886

Which of the following reference source types would a librarian consult to identify all works published within Pakistan during a given year?

A union catalogue
A trade bibliography
A national bibliography✔️
A subject index

Correct Answer Logic:

A national bibliography systematically records all works published within a country during a specified period. In Pakistan, this function is partially served by the National Library of Pakistan. It is distinct from a trade bibliography (which lists commercially available items) or a subject index.

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Aptitude QUESTION #10947

Question 1887

The number of diagonals in a decagon (10-sided polygon) is:

35✔️
40
30
45

Correct Answer Logic:

Formula for number of diagonals in an \(n\-sided polygon: \(\dfrac{n(n-3)}{2}\

For decagon ($n = 10$: \(\dfrac{10 \times 7}{2} = \dfrac{70}{2} = \mathbf{35}\

This formula counts all connections between non-adjacent vertices. Total connections = \(\binom{10}{2} = 45\, minus 10 sides = 35 diagonals.

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Education QUESTION #6750

Question 1888

A test developer calculates item difficulty (p-value) for a four-choice MCQ and obtains p = 0.92. What is the MOST appropriate interpretation and action?

The item has excellent discrimination and should be retained as-is
The item is very easy; it should be reviewed and possibly replaced unless the purpose specifically requires mastery-level warm-up items✔️
The item has optimal difficulty for a norm-referenced test since p-value is above 0.5
The item discrimination index will necessarily be high because many students answered correctly

Correct Answer Logic:

For a four-alternative MCQ, the optimal p-value is approximately 0.62. A p-value of 0.92 means 92% answered correctly — the item is very easy. In NRT contexts this reduces discrimination power. Items above p = 0.90 need careful review. High p-value does not guarantee high discrimination; in fact, near-universal correct responses often yield near-zero or negative discrimination.

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Physics QUESTION #7862

Question 1889

Escape velocity from Earth depends on:

Angle of projection
Mass and angle
Mass of Earth✔️
Mass of body

Correct Answer Logic:

v_esc = √(2GM/R), independent of mass of body and angle.

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Reading and Writing (Module-1) QUESTION #10405

Question 1890

Despite years of ------- research, the team never managed to isolate the gene responsible for the disorder.

cursory
painstaking✔️
haphazard
superficial

Correct Answer Logic:

'Years of X research' before failing to find something suggests thorough effort, matching 'painstaking.'

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Quantitative Reasoning QUESTION #8124

Question 1891

The reception given to Kimura's radical theory of molecular evolution demonstrates that when _______ fights orthodoxy to a draw, novelty has successfully seized significant ground from convention.

imitation
reaction
dogmatism
invention✔️

Correct Answer Logic:

The sentence contrasts 'novelty' and 'convention' and describes a new theory challenging established thinking. The blank must describe what novelty does — it introduces something new to fight tradition. Invention (creating something new) parallels 'novelty' and directly opposes 'orthodoxy'/'convention.' 'Imitation' would reinforce orthodoxy. 'Reaction' and 'dogmatism' don't convey new creative challenge.

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MBBS QUESTION #10251

Question 1892

A patient with cyanotic congenital heart disease develops chronic hypoxia and subsequently polycythemia. This compensatory rise in red cell mass is primarily driven by increased secretion of which hormone?

Erythropoietin from renal peritubular cells, stimulated by chronic tissue hypoxia✔️
Aldosterone
Antidiuretic hormone (ADH)
Renin

Correct Answer Logic:

Chronic hypoxia stimulates renal peritubular cells (via hypoxia-inducible factor pathways) to increase erythropoietin secretion, driving compensatory erythropoiesis and raising oxygen-carrying capacity, at the cost of increased blood viscosity and thrombotic risk.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3248

Question 1893

'Cyanosis' is most easily observed in which areas?

Hair and nails
Lips, tongue, and nail beds✔️
Shoulders
Knees

Correct Answer Logic:

Thin-skinned areas with rich blood supply show the blue tint of deoxygenated blood clearly.

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General Intelligence/Ability QUESTION #3978

Question 1894

Determine which of the following mathematical expressions results in the largest value:

$4 \times \sqrt{4}$✔️
$4^2$
$4 \times 4 \times 4$
$\sqrt{4}$

Correct Answer Logic:

2

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Aptitude QUESTION #11044

Question 1895

If all letters of the word 'ARCHITECT' are arranged alphabetically, which letter is exactly in the middle?

H✔️
C
T
R

Correct Answer Logic:

Letters in 'ARCHITECT': A, R, C, H, I, T, E, C, T. Alphabetically: A, C, C, E, H, I, R, T, T. With 9 letters, the 5th (middle) letter is H.

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Physics QUESTION #1036

Question 1896

Full wave rectifier with $V_{in}=220\sin(100\pi t)$ V. At $t=15\ \text{ms}$, which diodes are forward/reverse biased?

$D_1$ and $D_2$ both forward biased
$D_1$ and $D_2$ both reverse biased
$D_1$ forward biased, $D_2$ reverse biased
$D_1$ reverse biased, $D_2$ forward biased✔️

Correct Answer Logic:

At $t=15\ \text{ms}$: $V_{in}=220\sin(100\pi\times0.015)=220\sin(1.5\pi)=220\times(-1)=-220\ \text{V}$. The voltage is negative (in the negative half cycle). In a full wave rectifier, during the negative half cycle, $D_1$ is reverse biased and $D_2$ is forward biased.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3176

Question 1897

A cell placed in a 'Hypertonic' solution will:

Swell and burst
Stay the same size
Shrink (Crenate)✔️
Divide immediately

Correct Answer Logic:

Water leaves the cell to balance the higher solute concentration outside, causing the cell to shrink.

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5693

Question 1898

Which of the following is a 'Chemical Incompatibility' resulting from an oxidation-reduction reaction?

Salicylic acid with Iron salts
Ascorbic acid in alkaline solution✔️
Calcium Gluconate with Sodium Bicarbonate
Magnesium Sulfate with Alcohol

Correct Answer Logic:

Ascorbic acid (Vitamin C) is highly susceptible to oxidation, especially in alkaline conditions.

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Pakistan Affairs QUESTION #7689

Question 1899

The China-Pakistan Economic Corridor (CPEC) entered which phase in 2023?

Planning
Early Harvest
Industrialization✔️
None of these

Correct Answer Logic:

CPEC entered its second phase focusing on industrialization in 2023. After completing major infrastructure projects in the first phase, the focus shifted to industrial cooperation, special economic zones, and socio-economic development projects.

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Education QUESTION #6785

Question 1900

Bloom's original (1956) Taxonomy listed 'Synthesis' above 'Analysis' and 'Evaluation' as the highest level. Anderson and Krathwohl's revised taxonomy (2001) made two significant changes. Which accurately describes BOTH changes?

They added a seventh level called 'Innovation' and renamed 'Knowledge' to 'Remembering'
They reversed the two highest categories (Evaluation moved above Synthesis, which was renamed Creating) and changed all category names from nouns to verbs✔️
They collapsed the taxonomy to four levels and merged Synthesis with Evaluation
They added the Psychomotor and Affective domains to the Cognitive domain

Correct Answer Logic:

In the Revised Bloom's Taxonomy by Anderson and Krathwohl: (1) All category names were changed from nouns to verbs (Knowledge → Remembering; Comprehension → Understanding; etc.). (2) The two highest levels were reversed — Creating (formerly Synthesis) became the highest level, above Evaluating. This reflects the view that generating new ideas is cognitively more demanding than judging existing ones.

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