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Islamic Studies QUESTION #356

Question 821

"Al-Farooq" (biography of Hazrat Umar) was written by:

Shah Waliullah
Sir Syed Ahmad Khan
Sulaiman Nadvi
Shibli Noumani✔️

Correct Answer Logic:

Shibli Noumani is the author of this famous Urdu biography.+1

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Information Technology QUESTION #1147

Question 822

Which join returns all records when there is a match in either left or right table?

Inner Join
Left Join
Full Outer Join✔️
Right Join

Correct Answer Logic:

A Full Outer Join combines the results of both Left and Right outer joins and returns all rows from both tables, filling with NULLs where matches are missing.

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Math Physics Chemistry Biology QUESTION #11312

Question 823

Which of the following is a monohybrid cross?

AA x aa
Aa x Aa✔️
AA x AA
Aa x aa

Correct Answer Logic:

A monohybrid cross involves a single trait, e.g., Aa x Aa.

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Maths QUESTION #4503

Question 824

Which property states that $a \times b = b \times a$?

Associative
Commutative✔️
Distributive
Identity

Correct Answer Logic:

The commutative property of multiplication states that order doesn't matter: $a \times b = b \times a$

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Aptitude QUESTION #10935

Question 825

In architecture, the term 'fenestration' refers to:

The foundation design of a building
The arrangement and design of windows and openings in a building✔️
The decorative patterns on a ceiling
The structural column spacing system

Correct Answer Logic:

Fenestration comes from the Latin word fenestra meaning window.

It refers to the design, proportion, and arrangement of windows, doors, skylights, and other openings in the walls of a building.

Fenestration is critical for:

Natural light and ventilation
Thermal performance (heat gain/loss)
Visual aesthetics and facade composition
Views and connection to the exterior

It is a major component of building envelope design and energy efficiency.

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General Knowledge QUESTION #8723

Question 826

Which country has the highest average life expectancy for males?

Japan✔️
Germany
Iceland
None above

Correct Answer Logic:

Japan consistently has the highest life expectancy.

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MCQs Section QUESTION #5200

Question 827

School, college اور university قواعد کی رو سے کیا ہیں؟

اسمِ ظرفِ زمان
اسمِ ظرفِ مکان✔️
اسمِ ظرف
ان میں سے کوئی نہیں

Correct Answer Logic:

اسکول، کالج اور یونیورسٹی جگہوں کے نام ہیں اس لیے یہ اسمِ ظرفِ مکان کہلاتے ہیں۔

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Chemistry QUESTION #5584

Question 828

In the Lucas test, which alcohol reacts the fastest and by which mechanism?

Secondary alcohol by $S_N1$
Tertiary alcohol by $S_N1$✔️
Secondary alcohol by $S_N2$
Tertiary alcohol by $S_N2$

Correct Answer Logic:

Lucas reagent is $ZnCl_2$/conc. HCl. The reaction involves formation of a carbocation ($S_N1$). Tertiary alcohols form the most stable tertiary carbocations, so they react immediately (solution turns turbid at once). Secondary alcohols react slowly, and primary alcohols require heating. The mechanism for tertiary (and secondary) alcohols is $S_N1$.

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Math Physics Chemistry Biology QUESTION #11259

Question 829

In the cardiac cycle the 'lub' sound is produced by:

Closure of the semilunar valves
Closure of the atrioventricular (AV) valves✔️
Opening of the AV valves
Contraction of the atria

Correct Answer Logic:

The first heart sound ('lub') is produced by the closure of the atrioventricular (AV) valves — the tricuspid and mitral (bicuspid) valves — at the beginning of ventricular systole. The 'dub' sound is produced by closure of the semilunar valves.

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Reading and Writing (Module-1) QUESTION #10439

Question 830

Many deep-sea creatures are ------- and nearly -------: they are difficult for researchers to locate as well as to photograph.

translucent . . invisible
elusive . . undetectable✔️
luminous . . visible
massive . . immobile

Correct Answer Logic:

Creatures hard to locate and photograph are both 'elusive' and 'undetectable.'

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The Constitution of Pakistan QUESTION #9340

Question 831

Article 2A elevated the Objectives Resolution to what legal status?

A preamble with persuasive value only
Substantive part of the Constitution with binding effect✔️
A directive principle enforceable only by Parliament
A schedule subject to amendment by simple majority

Correct Answer Logic:

Article 2A, inserted by P.O. No. 14 of 1985, provides that the principles set out in the Objectives Resolution 'are hereby made substantive part of the Constitution and shall have effect accordingly.' This means the Objectives Resolution is no longer merely aspirational — it carries binding constitutional weight.

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Library Sciences QUESTION #1511

Question 832

Which of the following best distinguishes 'description' from 'subject access' in the cataloguing process?

Description assigns classification numbers; subject access creates authority files
Description records bibliographic and physical attributes of a resource; subject access represents its intellectual content✔️
Description is done manually; subject access is always automated
Description applies only to books; subject access applies only to journals

Correct Answer Logic:

Description in cataloguing refers to recording the bibliographic and physical attributes of an item (title, author, edition, publisher, etc.), while subject access involves representing the intellectual content of the resource through subject headings and classification numbers.

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Mathematics QUESTION #6946

Question 833

Let $A$ and $B$ be $3\times3$ real matrices where $A$ is symmetric and $B$ is skew-symmetric. The system $(A^2B^2 - B^2A^2)X = O$ (where $X$ is $3\times1$ and $O$ is the $3\times1$ zero matrix) has:

Exactly two solutions
Infinitely many solutions✔️
No solution
A unique solution

Correct Answer Logic:

Let $C = A^2B^2 - B^2A^2$. Since $A$ is symmetric: $A^T=A$, so $(A^2)^T=A^2$. Since $B$ is skew-symmetric: $B^T=-B$, so $(B^2)^T=B^2$.

$C^T = (A^2B^2)^T - (B^2A^2)^T = B^2A^2 - A^2B^2 = -C$

So $C$ is skew-symmetric. A real skew-symmetric $3\times3$ matrix always has determinant 0 (since $\det(C)=\det(C^T)=\det(-C)=-\det(C)$, giving $\det(C)=0$).

Since $\det(C)=0$, the homogeneous system $CX=O$ has infinitely many solutions.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3177

Question 834

Which plasma protein is primarily responsible for maintaining 'Colloid Osmotic Pressure'?

Fibrinogen
Albumin✔️
Gamma Globulin
Prothrombin

Correct Answer Logic:

Albumin is the most abundant plasma protein and prevents fluid from leaking out of capillaries.

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Physics QUESTION #1046

Question 835

The output Y of the given logic circuit (NAND-NAND implementation) is similar to output of a ________ gate.

OR
NOR
AND✔️
NAND

Correct Answer Logic:

The circuit shows: A and B fed into a NAND gate, A also fed separately, and outputs combined into another NAND. Using Boolean algebra: NAND of two NANDs of (A,B) and (A,A) simplifies to AND. The output $Y = \overline{\bar{A}+\overline{AB}} = A\cdot B$ (AND gate).

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Administration QUESTION #9577

Question 836

A country imposes a requirement that all imported pharmaceutical products must undergo domestic re-testing, despite having been certified by internationally recognized bodies. This measure is best classified as which type of trade barrier, and what is its primary effect on LDCs?

A tariff-rate quota — raising the effective cost of imports through a two-tier price system
A technical barrier to trade (TBT) — imposing compliance costs that disproportionately harm LDC exporters who lack resources to meet redundant certification requirements✔️
An anti-dumping duty — protecting domestic pharmaceutical manufacturers from below-cost foreign competition
A voluntary export restraint — limiting LDC pharmaceutical export volumes through bilateral negotiation

Correct Answer Logic:

Redundant domestic re-testing is a classic technical barrier to trade (TBT) under WTO classification. Unlike tariffs, TBTs are non-transparent and selectively burdensome — LDC exporters typically cannot afford repeated certification cycles, effectively excluding them from export markets despite having internationally valid certifications.

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MBBS QUESTION #10237

Question 837

Using the Fick principle for cardiac output, $CO = \dfrac{VO_2}{(CaO_2 - CvO_2)}$, a patient has an oxygen consumption of 250 mL/min, an arterial oxygen content of 20 mL/dL, and a mixed venous oxygen content of 15 mL/dL. What is the calculated cardiac output?

2.5 L/min
5 L/min✔️
10 L/min
50 L/min

Correct Answer Logic:

The arteriovenous oxygen difference is $20 - 15 = 5\ \text{mL/dL} = 0.05\ \text{mL/mL}$. $CO = \dfrac{250\ \text{mL/min}}{0.05} = 5000\ \text{mL/min} = 5\ \text{L/min}$ — a normal resting cardiac output, illustrating how the Fick method is used clinically (e.g., during cardiac catheterization) to measure CO.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3515

Question 838

'Ginger' (Adrak) belongs to the family:

Umbelliferae
Zingiberaceae✔️
Liliaceae
Solanaceae

Correct Answer Logic:

Zingiberaceae includes ginger, cardamom, and turmeric.

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Electronics Engineering QUESTION #11730

Question 839

A power analyser measures: $V_{rms} = 230\,\text{V}$, $I_{rms} = 10\,\text{A}$, $P = 1840\,\text{W}$. The power factor and reactive power $Q$ are:

$\text{PF} = 0.80$; $Q = 1380\,\text{VAR}$✔️
$\text{PF} = 0.85$; $Q = 1200\,\text{VAR}$
$\text{PF} = 1.0$; $Q = 0\,\text{VAR}$
$\text{PF} = 0.90$; $Q = 1000\,\text{VAR}$

Correct Answer Logic:

$S = V_{rms} \times I_{rms} = 230 \times 10 = 2300\,\text{VA}$. $\text{PF} = \dfrac{P}{S} = \dfrac{1840}{2300} = \mathbf{0.80}$. $Q = \sqrt{S^2 - P^2} = \sqrt{2300^2 - 1840^2} = \sqrt{5290000 - 3385600} = \sqrt{1904400} \approx \mathbf{1380\,\text{VAR}}$.

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Ability / HR / Governance / Special Education QUESTION #1886

Question 840

Under Rule 6(6) within how many days must an Inquiry Officer/Committee submit findings to the Authorized Officer after conclusion of proceedings?

7 days
14 days
10 days✔️
21 days

Correct Answer Logic:

Rule 6(6) states the Inquiry Officer or Committee shall submit findings within ten days of conclusion of proceedings or such longer period as allowed by the authorized officer.

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