Aptitude
Drills
BEL placement papers 2024
Overview
Section titled “Overview”BEL placement papers 2024. Primary filter: BEL / GATE-based Recruitment. Focus: GATE ECE/CSE technical, aptitude.
BEL Aptitude Mock Quiz
Timed placement-style MCQs with score and explanations after you submit. Use it to check speed and accuracy before the real test.
Questions15
Time10 min
Quantitative
The table shows sales (in thousands) for 5 products. If Product A sold 25% more than Product B, and Product B sold 40,000 units, find Product A's sales.
Product B = 40,000 Product A = 40,000 + 25% of 40,000 = 40,000 + 10,000 = 50,000
Verbal
Synonym of "Brief":
Brief means concise or short.
Quantitative
The ratio of ages of A and B is 3:5. After 10 years, the ratio becomes 5:7. Find the present age of A.
Let present ages be 3x and 5x After 10 years: (3x + 10)/(5x + 10) = 5/7 7(3x + 10) = 5(5x + 10) 21x + 70 = 25x + 50 4x = 20 x = 5 A's present age = 3 × 5 = 15 years
Verbal
Neither the teacher nor the students _____ present.
Verb agrees with nearer subject (students) → were.
Reasoning
In how many ways can 5 people be arranged in a row if two particular people must sit together?
Treat the two people as one unit: 4 units to arrange = 4! ways The two people can be arranged among themselves in 2! ways Total = 4! × 2! = 24 × 2 = 48 ways
Quantitative
In a mixture of 60 liters, the ratio of milk and water is 2:1. How much water should be added to make the ratio 1:2?
Correct answer: 60 liters
Reasoning
If P means +, Q means −, R means ×, then 18 R 2 P 6 Q 4 = ?
18 × 2 + 6 − 4 = 36 + 6 − 4 = 38.
Reasoning
If every letter is shifted +2 in the alphabet, SUN becomes:
Each letter +2 → UWP.
Quantitative
The ratio of ages of A and B is 3:5. After 8 years, the ratio becomes 5:7. Find the present age of A.
Let present ages be 3x and 5x. After 8 years: - A's age: 3x + 8 - B's age: 5x + 8 Given: (3x + 8)/(5x + 8) = 5/7 7(3x + 8) = 5(5x + 8) 21x + 56 = 25x + 40 4x = 16 x = 4 Present age of A = 3x = 3 × 4 = 12 years
Verbal
"To add fuel to the fire" means:
It means worsening a conflict or situation.
Reasoning
All pens are books. Some books are papers. Conclusion: Some pens are papers.
No definite overlap between pens and papers.
Reasoning
Find the next number: 1, 3, 6, 10, 15, ?
Correct answer: 21
Verbal
Problem: Find the synonym of "MAGNIFICENT": a) Ordinary b) Splendid c) Small d) Ugly
Magnificent means impressively beautiful or grand, so "Splendid" is the synonym.
Quantitative
If 20% of a number is 60, what is 35% of that number?
Let the number be x 20% of x = 60 x = 60 × 100/20 = 300 35% of 300 = 35/100 × 300 = 105
Quantitative
A train 150 m long runs at 54 km/h. Time to cross a man standing is:
54 km/h = 15 m/s. Time = 150/15 = 10 s.
Your score
0/15(0%)
Review
Sample BEL Questions with Solutions
Section titled “Sample BEL Questions with Solutions”Practice-style questions (not leaked live papers).
Aptitude / Reasoning
Section titled “Aptitude / Reasoning”Q1: If 30% of x = 150, x = ?
Answer: 500
Explanation: 0.3x=150 => x=500.
Q2: Average of 5 numbers is 20. One number 30 replaced by 10. New average?
Answer: 16
Explanation: Sum 100 -> 80; avg 16.
Q3: A finishes in 10 days, B in 15. Together?
Answer: 6 days
Explanation: 1/10+1/15=1/6.
Q4: Probability of drawing an ace from a deck?
Answer: 1/13
Explanation: 4/52=1/13.
Q5: Pipe A fills in 6h, B in 8h. Together to fill?
Answer: 24/7 hours
Explanation: 1/6+1/8=7/24.
Q6: CP Rs.500, SP Rs.600. Profit percent?
Answer: 20%
Explanation: (100/500)*100=20%.
Q7: Find next: 2, 6, 12, 20, 30, ?
Answer: 42
Explanation: n(n+1) pattern.
Q8: A train 120 m long runs at 54 km/h. Time to pass a pole?
Answer: 8 seconds
Explanation: 54 km/h = 15 m/s; t = 120/15 = 8 s.
Coding Practice
Section titled “Coding Practice”Coding Q1: Longest substring without repeat
Approach: Sliding window + last index.
Complexity: O(n)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q2: Merge intervals
Approach: Sort + merge.
Complexity: O(n log n)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q3: Top K frequent
Approach: Count + heap.
Complexity: O(n log k)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q4: Linked list cycle
Approach: Floyd tortoise-hare.
Complexity: O(1) space
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q5: Level order traversal
Approach: BFS queue.
Complexity: O(n)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q6: Coin change min coins
Approach: DP unbounded.
Complexity: O(amount*coins)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q7: Binary search
Approach: Lo/hi mid.
Complexity: O(log n)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q8: Kadane max subarray
Approach: Running best.
Complexity: O(n)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q9: Reverse a string in-place
Approach: Two pointers from ends.
Complexity: O(n)/O(1)
BEL tip: Narrate brute force then optimize then edge cases before coding.
Coding Q10: Check prime
Approach: Trial division to sqrt(n).
Complexity: Handle n<2
BEL tip: Narrate brute force then optimize then edge cases before coding.
Deep Prep Notes for BEL
Section titled “Deep Prep Notes for BEL”How the BEL / GATE-based Recruitment Usually Feels
Section titled “How the BEL / GATE-based Recruitment Usually Feels”Candidates describe a paced filter where easy marks disappear if you over-invest in one hard item. For BEL, start with a three-minute scan, mark certainty levels, and protect accuracy. Languages typically include C, C++, Embedded (role).
Topic Weight Hints (Candidate-Reported)
Section titled “Topic Weight Hints (Candidate-Reported)”| Area | Why it matters at BEL |
|---|---|
| GATE ECE/CSE technical | Primary shortlist signal |
| Core CS (OOPs/DBMS/OS) | Technical interview depth |
| Defence Electronics PSU awareness | Managerial / HR differentiation |
| Communication | Especially for consulting and client-facing GSIs |
14-Day Sprint
Section titled “14-Day Sprint”- Days 1-3: pattern familiarization + 2 sectional mocks
- Days 4-7: weak-topic closed practice
- Days 8-10: full mocks every other day
- Days 11-14: interview narration + light revision
Related
Section titled “Related”Coding
DSA
OA
Assessment
Hub
BEL