RRB NTPC 2021 PYQs

Question 1

Seven students A, B, C, D, E, F and G take a series of test. No two students get the same marks. A always scores more than B. G always scores more than A. Each time either C scores the highest and E scores the least or D scores the highest and F or B scores the least.If D is ranked sixth and B is ranked fifth according to their marks, then which of the following can be true?

Accepted Answer

Given D is 6th and B is 5th. This means D is not highest, so C is highest and E is lowest. A > B, G > A. Since B is 5th, A must be 4th. G must be 1st, 2nd, or 3rd. F can be 3rd or 4th.

Question 2

Which of the following is an input device?

Accepted Answer

An Optical Character Reader (OCR) converts printed text into digital data, making it an input device. The other options are output devices.

Question 3

Near-sightedness in humans is called:

Accepted Answer

Near-sightedness, where distant objects appear blurry, is medically known as Myopia. It is a common refractive error.

Question 4

The median of the data in ascending order 7, 11, 12, (x – y), (x + y), 20, 21, 29 is 16. Find the value of x.

Accepted Answer

The data has 8 terms. The median is the average of the 4th and 5th terms. So, [(x-y) + (x+y)]/2 = 16. This simplifies to 2x/2 = 16, hence x = 16.

Question 5

Which is the largest island in the Mediterranean Sea?

Accepted Answer

Sicily, an autonomous region of Italy, is the largest island in the Mediterranean Sea by both area and population. It is a well-known geographical fact.

Question 6

What was the code name for Pokhran Nuclear Test 2?

Accepted Answer

Pokhran-II, a series of five nuclear bomb test explosions conducted by India in May 1998, was codenamed Operation Shakti. This marked India's second nuclear test.

Question 7

If a + b + c = 14, ab + bc + ca = 47 and abc = 15 then find the value of a3+ b3+c3.

Accepted Answer

Use the identity a³+b³+c³-3abc = (a+b+c)(a²+b²+c²-ab-bc-ca). First, find a²+b²+c² using (a+b+c)² = a²+b²+c²+2(ab+bc+ca). Substitute values to get a³+b³+c³.

Question 8

In the following question, four letter pairs are given. The letters on left side of (-) is related to the letters on the right side of (-) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

Accepted Answer

The pattern is +8, -8, +8 for each letter. PSD (+8) -> KYU. SJF (+8) -> MPX. NRB (+8) -> IXS. Option 2 (ZBN - EHU) does not follow this pattern, making it the odd one out.

Question 9

Who initiated the Pradhan Mantri Jan Dhan Yojana (PMJDY)?

Accepted Answer

The Pradhan Mantri Jan Dhan Yojana (PMJDY) was launched by Prime Minister Narendra Modi on August 28, 2014, to promote financial inclusion.

Question 10

According to India's Election Commission, political parties cannot release their manifesto in pre poll silence period of:

Accepted Answer

The Election Commission of India prohibits political parties from releasing their manifesto during the 48-hour 'silence period' before polling ends. This ensures a level playing field.

Question 11

In which year was Delhi officially announced as the Capital of British India by then Emperor George V?

Accepted Answer

King George V announced Delhi as the new capital of British India during the Delhi Durbar on December 12, 1911, shifting it from Calcutta.

Question 12

The First elected Parliament of independent India came into existence in -

Accepted Answer

The first general elections in independent India were held in 1951-52, leading to the formation of the first elected Parliament in April 1952.

Question 13

Which is an international treaty among industrialized nations that sets mandatory limits on greenhouse gas emissions?

Accepted Answer

The Kyoto Protocol is an international treaty that commits industrialized countries to reduce greenhouse gas emissions, aligning with the question's description.

Question 14

Name the first lady President of the Indian National Congress.

Accepted Answer

Annie Besant was the first woman President of the Indian National Congress, presiding over the Calcutta session in 1917. This is a direct factual recall question.

Question 15

In which form is data stored in a computer?

Accepted Answer

Computers fundamentally operate using electrical signals, which are represented as binary digits (0s and 1s). All data, regardless of its original form, is converted into binary for storage and processing.

Question 16

Find the value of tan 15° + cot 15°

Accepted Answer

Use the identity tanθ + cotθ = 2/sin(2θ). Substitute θ = 15°, so 2θ = 30°. Since sin 30° = 1/2, the expression becomes 2/(1/2) = 4.

Question 17

Identify the principal organ of the UN which got suspended in 1994?

Accepted Answer

The UN Trusteeship Council suspended operations on 1 November 1994, after Palau, the last remaining UN trust territory, achieved independence.

Question 18

Which of the following Heritage sites has the Dravidian style of architecture?

Accepted Answer

Hampi, the capital of the Vijayanagara Empire, is renowned for its magnificent temples and monuments built in the Dravidian style of architecture.

Question 19

Select the option that is related to the sixth number in the same way as the third number is related to the fourth number and the first number is related to the second number.7 : 342 :: 9 : 728 :: ? : 2196

Accepted Answer

The pattern is x : (x^3 - 1). So, 7 : (7^3 - 1) = 7 : 342. And 9 : (9^3 - 1) = 9 : 728. For the last pair, 2196 = x^3 - 1, so x^3 = 2197, which means x = 13.

Question 20

In a certain code language FMOPRA is written as 834207 and KQMATL is written as 953761. How will QTMPRL be written as in that language?

Accepted Answer

Assign digits to letters based on the given codes. Q=5, T=6, M=3, P=2, R=0, L=1. Combining these gives 563201.