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Dengue virus (DENV), with four serotypes (DENV-1 to DENV-4), belongs to the family Flaviviridae, genus Flavivirus. Other members of Flaviviridae include Zika virus, Yellow fever virus, West Nile virus, and Japanese encephalitis virus. Dengue is transmitted by Aedes aegypti and Aedes albopictus mosquitoes. It causes dengue fever, dengue haemorrhagic fever, and dengue shock syndrome. Approximately 390 million infections occur annually worldwide.

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Chemistry QUESTION #7189

Question 4

In a mildly alkaline environment, the thiosulphate ion ($S_{2}O_{3}^{2-}$) undergoes oxidation by $MnO_{4}^{-}$ to produce a species designated as 'A'. What is the oxidation state of sulfur in this resulting product 'A'?

2
4
6✔️

Correct Answer Logic:

In a neutral or weakly alkaline medium, permanganate ($MnO_{4}^{-}$) oxidizes thiosulphate ($S_{2}O_{3}^{2-}$) to sulphate ($SO_{4}^{2-}$). The reaction is:

$8MnO_{4}^{-} + 3S_{2}O_{3}^{2-} + H_{2}O \rightarrow 8MnO_{2} + 6SO_{4}^{2-} + 2OH^{-}$

In the sulphate ion ($SO_{4}^{2-}$), the oxidation state of sulfur is $+6$.

[cite: 13]

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CISA QUESTION #6821

Question 5

During an audit, management presents a disaster recovery plan that was tested three years ago with successful results. The IT infrastructure has undergone significant changes since then including cloud migration and new applications. What is the auditor's PRIMARY concern?

Plan documentation needs updating
Plan effectiveness cannot be validated without recent testing reflecting current environment✔️
Test results are too old to be useful
Management commitment is questionable

Correct Answer Logic:

A DRP must be tested regularly and after significant changes. Successful testing three years ago provides no assurance that the plan works with the current infrastructure. Cloud migration and new applications represent material changes that could render the old plan ineffective. Current validity cannot be assumed.

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General Knowledge QUESTION #4764

Question 6

Hu Jintao held which positions simultaneously in China?

General Secretary of Communist Party only
President of China only
Both General Secretary of Communist Party and President✔️
Premier of the State Council

Correct Answer Logic:

Hu Jintao served simultaneously as General Secretary of the Communist Party of China and President of the People's Republic of China from 2002/2003 to 2012/2013.

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Accounting & Finance QUESTION #1200

Question 7

A partnership decides to incorporate into a private company. What happens to the partners' equity accounts?

They are closed and converted into common stock.✔️
They are retained in the company's balance sheet.
They are written off as expenses.
They are transferred into the retained earnings account.

Correct Answer Logic:

When a partnership incorporates, the legal entity changes. The partners' equity accounts are closed out, and the total equity is converted into the new company's share capital (common stock). Each partner's equity balance is typically used to determine the number of shares they receive in the new corporation.

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Physics QUESTION #7834

Question 8

Temperature coefficient of resistance is increase in resistance per ohm original resistance per:

Degree rise in temperature✔️
Unit increase in current
Unit decrease in capacitance
Degree drop in temperature

Correct Answer Logic:

α = (ΔR/R₀)/ΔT, units per °C.

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Boilers Mechanical Engineering QUESTION #4066

Question 9

The 'Safe Working Pressure' of an old boiler is usually:

Increased over time
Reduced as the metal thins due to corrosion (after inspection)✔️
Kept the same forever
Doubled for safety

Correct Answer Logic:

Inspectors calculate the remaining strength of the vessel and may derate its pressure.

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Agriculture Economics QUESTION #11897

Question 10

A price support (price floor) set above equilibrium in an agricultural market typically results in:

A shortage of the commodity
A surplus, since $Q_s > Q_d$, that the government or market must absorb✔️
No effect on quantity supplied
A decrease in the equilibrium price automatically

Correct Answer Logic:

A price floor above equilibrium causes quantity supplied to exceed quantity demanded ($Q_s > Q_d$), generating a surplus.

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Ability / HR / Governance / Special Education QUESTION #1807

Question 11

Rule 28(1) requires that bids be opened at a minimum of how many minutes after the deadline for submission of bids?

Fifteen minutes
Thirty minutes✔️
Forty-five minutes
Sixty minutes

Correct Answer Logic:

Rule 28(1) clearly states that bids shall be opened at the time specified in the bidding documents and shall be opened at least thirty minutes after the deadline for the submission of bids, to allow for any last-minute submissions to be received.

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Mathematics QUESTION #7438

Question 12

The sum of first 20 terms of the sequence 0.7, 0.77, 0.777, … is:

$\frac{7}{81}(179-10^{-20})$
$\frac{7}{9}(99-10^{-20})$
$\frac{7}{81}(179+10^{-20})$✔️
$\frac{7}{9}(99+10^{-20})$

Correct Answer Logic:

Each term can be written as $0.7, 0.77, 0.777, \ldots = \frac{7}{9}(0.9, 0.99, 0.999, \ldots) = \frac{7}{9}(1-10^{-1}, 1-10^{-2}, 1-10^{-3}, \ldots)$. The sum of first 20 terms is $S = \frac{7}{9}\sum_{k=1}^{20}(1-10^{-k}) = \frac{7}{9}\left[20 - \sum_{k=1}^{20}10^{-k}\right] = \frac{7}{9}\left[20 - \frac{0.1(1-10^{-20})}{1-0.1}\right] = \frac{7}{9}\left[20 - \frac{1-10^{-20}}{9}\right] = \frac{7}{9} \cdot \frac{180 - 1 + 10^{-20}}{9} = \frac{7}{81}(179 + 10^{-20})$.

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Physics QUESTION #1178

Question 13

In Lorentz transformation, motion along __________ axis remains unchanged (zero contraction/dilation).

One axis
Two axes✔️
Three axes
None of these

Correct Answer Logic:

In the standard Lorentz transformation, motion is assumed along one axis (typically the x-axis). The dimensions perpendicular to the direction of motion (y and z axes) are unchanged — there is no length contraction in those directions. Only the x-dimension contracts and time dilates. So two axes (y and z) remain unaffected.

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Accounting & Finance QUESTION #6222

Question 14

When an auditor performs a 'Walk-through' procedure, they are:

Counting the physical inventory at the warehouse
Calculating the Zakat deductible at source
Tracing a transaction through the information system✔️
Reading the minutes of the board of directors

Correct Answer Logic:

Tracing transactions through the information system relevant to financial reporting is specifically defined as a 'walk-through'.

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HR and Management QUESTION #6435

Question 15

The term 'organizational restructuring' requiring effective HRM includes all EXCEPT:

Flattening organizational hierarchies
Mergers and acquisitions
Joint ventures and strategic alliances
Routine employee promotions✔️

Correct Answer Logic:

Organizational restructuring involves major changes like flattening organizations (reducing management levels), mergers and acquisitions (combining independent organizations), and joint ventures/alliances. Routine employee promotions are normal HR operations, not restructuring initiatives.

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English Literature QUESTION #668

Question 16

"The Gift of the Magi" is a short story by:

Guy de Maupassant
O. Henry✔️
Anton Chekhov
Mark Twain

Correct Answer Logic:

O. Henry is the pen name of William Sydney Porter, known for this story's twist ending.

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English Literature QUESTION #722

Question 17

In Wordsworth's "Tintern Abbey," the "still sad music of humanity" refers to:

A literal song
Human suffering and mortality✔️
Industrial noise
Church bells

Correct Answer Logic:

It reflects the poet's mature understanding of the interconnectedness of human experience and sorrow.

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Law QUESTION #9506

Question 18

A obtained an injunction ex parte restraining B from constructing a boundary wall. The injunction was obtained on A's affidavit that B had commenced construction overnight. At the return date, evidence shows the affidavit was false — no construction had taken place. The Court vacates the injunction. B seeks compensation. Is B entitled to compensation and through what forum?

B can apply within the same suit under Section 95 CPC for compensation; the Court may award reasonable compensation if it finds the injunction was obtained on insufficient grounds✔️
B must file a separate suit for damages for wrongful injunction
The Court can impose costs but cannot award compensation
B can only obtain compensation through a suit in tort

Correct Answer Logic:

Section 95 CPC specifically allows a Court to award compensation to the defendant in the same suit for obtaining an arrest, attachment, or injunction on insufficient grounds, without requiring a separate suit. The Court has discretion to award an amount it considers reasonable.

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