DCOA Mixed Practice Test #724

Question 1

Vaccination was pioneered by:‌​‍

Accepted Answer

Jenner — Edward Jenner pioneered vaccination in 1796 using cowpox to prevent smallpox.‌​‍

Answer

Pasteur

Answer

Fleming

Answer

Koch

Question 2

AI Safety Summit 2023 was hosted at:‌​‍

Accepted Answer

Bletchley Park, UK — The first global AI Safety Summit was held at Bletchley Park, UK in November 2023.‌​‍

Answer

San Francisco

Answer

Brussels

Answer

Davos

Question 3

Global terrorism — UN Global Counter-Terrorism Strategy adopted in:‌​‍

Accepted Answer

2006 — UN Global Counter-Terrorism Strategy adopted unanimously Sept 2006. ‌​‍Four pillars. India has long pushed for Comprehensive Convention on International Terrorism (CCIT) without success.

Answer

2015

Answer

2020

Answer

2001

Question 4

DNA vs RNA — sugar difference:‌​‍

Accepted Answer

DNA: deoxyribose; RNA: ribose (extra OH at 2') — Also: DNA has T (thymine); RNA has U (uracil). ‌​‍DNA double-stranded; RNA single-stranded (usually).

Answer

RNA has fructose

Answer

DNA has glucose

Answer

Same

Question 5

Abraham Lincoln was assassinated in:‌​‍

Accepted Answer

1865 — Lincoln shot at Ford's Theatre by John Wilkes Booth, 14 April 1865 (died 15 April). ‌​‍Days after Civil War ended.

Answer

1863

Answer

1861

Answer

1877

Question 6

Which of the following gross motor milestones is typically expected in a 6-month-old infant?

Accepted Answer

B. Sitting without support — A 6-month-old infant typically achieves the milestone of sitting without support. Walking independently is expected around 12-15 months, and standing holding onto furniture usually occurs around 9-10 months. Crawling on hands and knees typically develops around 8-9 months.

Answer

A. Walking independently

Answer

C. Standing holding onto furniture

Answer

D. Crawling on hands and knees

Question 7

LED works on principle of:‌​‍

Accepted Answer

Electroluminescence — photon emission on recombination — Direct bandgap semiconductors (GaAs, GaN). ‌​‍Energy of photon ≈ bandgap. Nobel 2014 for blue LED.

Answer

Thermionic emission

Answer

Diffraction

Answer

Photoelectric effect

Question 8

Block Panchayats:‌​‍

Accepted Answer

152 — 152 blocks.‌​‍

Answer

300

Answer

100

Answer

200

Question 9

Kalaripayattu originated in:

Accepted Answer

Kerala — Kalaripayattu — ancient martial art from Kerala, possibly world's oldest.

Answer

Tamil Nadu

Answer

Karnataka

Answer

Andhra Pradesh

Question 10

India hosted AI Safety meetings:‌​‍

Accepted Answer

Yes — Active role.‌​‍

Answer

Only observer

Answer

Not yet

Answer

No

DCOA Mixed Practice Test #724