Coding-Decoding Mock Test | Reasoning | RRB NTPC

Q1. Which shape has one curved surface and two flat circular bases?

Sphere Cone Cube Cylinder

Q2. If 'WHITE' is coded as 'XJUIF', how is 'BLACK' coded?

BMBLD BMBLC BLAKD BMACK

Q3. A programmer is designing an algorithm to find the most efficient way to multiply a chain of matrices. This problem can be solved using a technique that breaks the problem into subproblems and stores their solutions to avoid recomputation. This is an example of:

Divide and Conquer Greedy Approach Dynamic Programming Backtracking

Q4. In a code, 'MASTER' is coded as 'NBTUFS', how is 'COMPANY' coded?

DPNQBOZ DPNQBOY DPNQBOX DPNQBOY

Q5. What is an 'edge case' in problem-solving?

A common input scenario A typical test case An unusual or extreme input scenario that might cause issues A standard algorithm

Q6. A student qualifies for a merit scholarship if their exam score is above 90 AND their attendance is above 95%. They qualify for a participation award if their exam score is above 75 AND their attendance is above 85%, OR if their exam score is above 85 (regardless of attendance). If a student scores 88 and has 92% attendance, do they qualify for a participation award?

No Yes, due to exam score Yes, due to attendance Yes, due to both

Q7. If w = 11, what is the value of 2 * w - 5 + (w + 4) / 3?

17 18 19 20

Q8. If 'MAN' is coded as 'NB O', what is the relationship?

+1 to all +1 to first and third, -1 to second +1, +2, +3 Vowels are changed to next consonant

Q9. You are designing a system that simulates a queue of customers at a bank. Customers are served in the order they arrive. Which abstract data type (ADT) best models this behavior?

Stack. Priority Queue. Queue. Set.

Q10. If a condition is false, what will be the output of: IF (condition is false) THEN print "Yes" ELSE print "No"?

Yes No Error Nothing

Q11. Which of the following demonstrates a simple letter shift pattern?

ABC -> CBA ABC -> ACD ABC -> BCD ABC -> DFE

Q12. If WORLD = XPSME, what is EARTH coded as?

FBSIU FBSIV FBSIW FBSIX

Q13. What part of the body can you form by unscrambling D H A E?

DEAH ADHE EHAD HEAD

Q14. Suppose you have a matrix representing a game board where some cells are traps. You want to find if there's a path from the start to the end that avoids all traps, and if so, find the shortest such path. What is the most efficient algorithm for this?

DFS Dijkstra's Algorithm (treating traps as impassable) BFS (treating traps as impassable) Bellman-Ford Algorithm

Q15. If a loop needs to run exactly 5 times, which type of loop is most suitable?

While loop For loop If statement Do-while loop

Q16. In a coded language, '396' means 'books are old', '739' means 'they are old', and '675' means 'most are old'. What is the code for 'books'?

9 6 3 7

Q17. If 'BRAIN' is coded as 'CSBJO', what is the code for 'SPINE'?

TQJOF TQJOF TQJOF TQJOF

Q18. If 'YOUNG' is coded as 'OLD', what is 'NEW' coded as?

ANCIENT FRESH OLD PAST

Q19. Complete the sequence: D4E, E5F, F6G, G7H, ?

H8I I8J H7I I7H

Q20. A person starts from a point, walks 10 km North, then turns East and walks 5 km. He then turns South and walks 10 km. In which direction is he from his starting point?

East West North South

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