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English QUESTION #2770

What does the phrase 'ONCE IN A BLUE MOON' mean? (Note: An idiom's meaning cannot be guessed from the individual words)

Very frequently
Every month
Very rarely✔️
During nighttime

Correct Answer Logic:

'Once in a blue moon' is an idiom meaning something that happens very rarely or infrequently. A 'blue moon' is a rare astronomical event, which is why it represents rarity. Example: 'He visits us once in a blue moon.'

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MCQs Section QUESTION #5076

Question 4482

بابائے اردو کس شخصیت کو کہا جاتا ہے؟

مولوی عبدالحق✔️
مولانا ظفر علی خان
سر سید احمد خان
ان میں سے کوئی نہیں

Correct Answer Logic:

مولوی عبدالحق کو 'بابائے اردو' کہا جاتا ہے کیونکہ انہوں نے اردو زبان و ادب کی بے مثال خدمت کی۔

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Mathematics QUESTION #6036

Question 4483

Two complex numbers $z_1$ and $z_2$ satisfy $|z_2|=1$ and $\dfrac{z_1-2z_2}{2-z_1\bar{z}_2}$ is unimodular, but $z_2$ is not unimodular. Where does $z_1$ lie?

On a line parallel to the $x$-axis
On a line parallel to the $y$-axis
On a circle of radius 2✔️
On a circle of radius $\sqrt{2}$

Correct Answer Logic:

Let $w = \frac{z_1-2z_2}{2-z_1\bar{z}_2}$, with $|w|=1$.

$|z_1-2z_2|^2 = |2-z_1\bar{z}_2|^2$

$(z_1-2z_2)\overline{(z_1-2z_2)} = (2-z_1\bar{z}_2)\overline{(2-z_1\bar{z}_2)}$

$|z_1|^2 - 2z_1\bar{z}_2 - 2\bar{z}_1z_2 + 4|z_2|^2 = 4 - 2z_1\bar{z}_2 - 2\bar{z}_1z_2 + |z_1|^2|z_2|^2$

$|z_1|^2 + 4|z_2|^2 = 4 + |z_1|^2|z_2|^2$

$|z_1|^2(1-|z_2|^2) = 4(1-|z_2|^2)$

Since $|z_2|\neq1$: $|z_1|^2=4\Rightarrow|z_1|=2$. So $z_1$ lies on a circle of radius 2.

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English QUESTION #8290

Question 4484

One should do _______ duty honestly.

His
One's✔️
One
Their

Correct Answer Logic:

'One' takes the possessive 'one's'.

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Mathematics QUESTION #11144

Question 4485

Evaluate $\displaystyle\oint_C \frac{z^2-z+1}{z-1}\,dz$ where $C$ is the circle $|z| = \dfrac{1}{2}$:

$1$
$2$
$\dfrac{1}{2}$
$0$✔️

Correct Answer Logic:

The singularity of $\dfrac{z^2-z+1}{z-1}$ is at $z=1$. Since $|1| = 1 > \dfrac{1}{2}$, the pole $z=1$ lies outside the contour $|z|=\frac{1}{2}$. By Cauchy's theorem, the integral of an analytic function over a closed contour is $0$ when no singularities are enclosed. Therefore $\displaystyle\oint_C \frac{z^2-z+1}{z-1}\,dz = \mathbf{0}$.

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General Knowledge QUESTION #8995

Question 4486

Why is 'Wall Street' so famous?

Leading British newspaper offices
Stock exchange market of New York✔️
London's famous shopping center
None of these

Correct Answer Logic:

Wall Street is the financial hub of the US.

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Dairy Food Science and Technology QUESTION #5948

Question 4487

Which cheese variety is classified as a mold-ripened cheese where mold grows on the surface?

Cheddar
Gouda
Camembert ($Penicillium\;camemberti$ surface mold)✔️
Emmental

Correct Answer Logic:

Camembert and Brie are surface mold-ripened cheeses where $Penicillium\;camemberti$ (white mold) grows on the rind. Proteolytic and lipolytic enzymes diffuse inward, ripening the cheese from outside in. In contrast, blue cheeses have $Penicillium\;roqueforti$ growing internally.

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Physics QUESTION #7342

Question 4488

A projectile has initial velocity $(2\hat{i}+3\hat{j})\text{ m/s}$ at point A (at ground level). At point B (on the x-axis, same height as A), its velocity is:

$2\hat{i}+3\hat{j}$
$-2\hat{i}-3\hat{j}$
$-2\hat{i}+3\hat{j}$
$2\hat{i}-3\hat{j}$✔️

Correct Answer Logic:

Horizontal component is unchanged throughout: $v_x = 2\text{ m/s}$.

When the projectile returns to the same height, the vertical component reverses: $v_y = -3\text{ m/s}$.

Velocity at B $= \mathbf{2\hat{i} - 3\hat{j}}$

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Geology QUESTION #10682

Question 4489

Which of the following fossil groups became extinct at the Permian–Triassic boundary (~252 Ma)?

Graptolites
Trilobites✔️
Ammonites
Ediacaran biota

Correct Answer Logic:

Trilobites became extinct at the end of the Permian (~252 Ma), during the largest mass extinction in Earth history (the 'Great Dying'), which eliminated ~90–96% of marine species. Graptolites became extinct earlier, by the Late Devonian. Ammonites survived the Permo-Triassic extinction but went extinct at the end-Cretaceous (K-Pg, ~66 Ma). Ediacaran biota disappeared at the Precambrian–Cambrian boundary (~541 Ma).

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English QUESTION #8332

Question 4490

He is interested _______ stamp collection.

at
in✔️
of
with

Correct Answer Logic:

'Interested in' is the correct preposition.

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The Elections Act 2017 QUESTION #9432

Question 4491

Under Section 61(1) [as amended 2023], the nomination deposit for election to the National Assembly is Rs. 30,000 and for Provincial Assembly is Rs. 20,000. What does Section 61(3) [as amended 2023] now provide regarding refundability of this deposit?

It is refunded if the candidate secures more than one-eighth of total votes polled
It is refunded only if the candidate wins the election
The sum deposited shall be non-refundable✔️
It is refunded upon submission of election expense return

Correct Answer Logic:

Section 61(3), as substituted by the Elections (Second Amendment) Act 2023, now states: 'The sum deposited shall be non-refundable' — eliminating the earlier refund provisions.

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Islamic Studies QUESTION #8233

Question 4492

What is the name of the Hill over which "Khutba Hajja-tul Wida" was delivered by the Prophet Muhammad (S.A.W)?

Safa
Marva
Jabi-i-Rehma✔️
None of these

Correct Answer Logic:

The Last Sermon (Khutbah Hajjat-ul-Wida) was delivered by Prophet Muhammad (PBUH) on Mount Arafat (Jabal al-Rahmah - Mount of Mercy) on 9th Dhul Hijjah 10 AH (March 632 CE) during his farewell pilgrimage. This historic sermon outlined fundamental human rights, equality, sanctity of life and property, rights of women, and the finality of prophethood. Over 100,000 companions witnessed this sermon, which serves as a constitution for human rights in Islam.

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English Literature QUESTION #10687

Question 4493

Please do not laugh __________ those beggars.

For
Against
At✔️
From

Correct Answer Logic:

The correct preposition is 'at'. We use the idiom 'laugh at' to mean to mock or ridicule someone. For example: 'Do not laugh at the poor.' Other prepositions like 'for', 'against', or 'from' do not collocate with 'laugh' in this context.

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English QUESTION #8571

Question 4494

What does the idiom 'to have an axe to grind' mean?

to use axe frequently
selfish motive✔️
to have dispute with someone
to be fair with someone

Correct Answer Logic:

'Have an axe to grind' means to have a hidden selfish motive.

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Professional QUESTION #1833

Question 4495

Section 10A(1) prohibits a civil servant from serving in any international organization during service. Which of the following organizations is EXPLICITLY mentioned in Section 10A as falling within the scope of this restriction?

Bilateral trade missions of Pakistan
Foreign donor agencies✔️
Multinational corporations operating in Pakistan
Foreign embassies accredited to Pakistan

Correct Answer Logic:

Section 10A(1) inserted by Act No. XVII of 2016 explicitly lists international organizations, international non-governmental organizations, international financial institutions, and foreign donor agencies as covered by the restriction. Multilateral or bilateral trade missions and foreign embassies are not listed in this section.

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Law QUESTION #5659

Question 4496

When a criminal act is done by several persons in furtherance of the __________ of all each such person is liable for that act in the same manner as if it were done by him alone.

common intention✔️
common object
Mens Rea
Actus Rea

Correct Answer Logic:

Under Section 34 PPC when a criminal act is done by several persons in furtherance of the common intention of all each such person is liable for that act as if it were done by him alone. This is the doctrine of joint liability based on common intention.

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General Knowledge QUESTION #11436

Question 4497

One Gigabyte (GB) is equivalent to:

1024 bits
1000 megabytes
1024 kilobytes
1024 megabytes✔️

Correct Answer Logic:

$1 \text{ GB} = 1024 \text{ MB}$. Digital storage units follow powers of 2: $1 \text{ KB} = 1024 \text{ bytes}$, $1 \text{ MB} = 1024 \text{ KB}$, $1 \text{ GB} = 1024 \text{ MB}$, $1 \text{ TB} = 1024 \text{ GB}$. These binary multiples are used because computers operate in base-2 (binary).

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Boilers Mechanical Engineering QUESTION #4023

Question 4498

'Blow-off Cock' is usually located at:

The top of the drum
The lowest point of the boiler✔️
The steam outlet
The chimney top

Correct Answer Logic:

It is used for removing heavy mud and draining the boiler.

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Biology Zoology Botany QUESTION #10830

Question 4499

The synthesis of an RNA molecule using a DNA template is called:

Translation
Central dogma
Transcription✔️
Replication

Correct Answer Logic:

Transcription is the process of synthesising RNA from a DNA template, catalysed by RNA polymerase. The resulting RNA molecule (mRNA, tRNA, rRNA) is complementary and antiparallel to the template DNA strand. Translation converts mRNA sequence into protein; replication copies DNA to DNA; the central dogma (Crick, 1958) describes the overall flow of genetic information: DNA → RNA → Protein.

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Aptitude QUESTION #10979

Question 4500

An analogy: Arch : Bridge :: Dome : ?

Minaret
Pendentive
Rotunda✔️
Vault

Correct Answer Logic:

Thinking about the relationship:

An arch is the key structural element in a (stone/masonry) bridge — it defines and enables the bridge's spanning ability.
A dome is the key structural/spatial element that defines a rotunda — a circular room covered by a dome.

A rotunda is specifically a round building or room topped with a dome. Famous examples: Pantheon (Rome), US Capitol Rotunda.

A pendentive is the transitional element between a square base and a dome — not the completed building type. A vault is a different structural form. A minaret is a tower.

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