Data Interpretation Sectional Test 2026 (25 MCQs with Solutions)

Last Updated: June 2026

This sectional test isolates data interpretation so you can build reading speed and approximation skill on tables, bar data, and pie shares. The formats mirror what candidates report from TCS NQT, Infosys, Wipro, Accenture, and Cognizant DI sections. Sit it in 30 minutes, then study every worked solution.

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Test Instructions

Parameter	Details
Total Questions	25
Total Time	30 minutes
Section	Data Interpretation only
Marking	+1 correct, -0.25 wrong
Target Score	18+ for placement readiness

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Set 1: Table Data (Q1-Q6)

The table shows the number of units sold by five salespeople over four months.

Salesperson	Jan	Feb	Mar	Apr
Amit	40	50	60	50
Bina	30	40	50	60
Chetan	50	50	40	60
Divya	60	40	50	50
Esha	20	30	50	40

Q1. What is the total number of units sold by Amit over the four months?

A) 180 B) 190 C) 200 D) 210

Q2. Who sold the most units in March?

A) Amit B) Bina C) Chetan D) Esha

Q3. What is the average monthly sales of Bina?

A) 40 B) 42.5 C) 45 D) 47.5

Q4. In which month was the total sales across all five highest?

A) January B) February C) March D) April

Q5. By what percentage did Esha's sales increase from January to March?

A) 100% B) 120% C) 130% D) 150%

Q6. What is the ratio of Chetan's total to Divya's total?

A) 1:1 B) 5:4 C) 4:5 D) 10:9

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Set 2: Bar Data (Q7-Q13)

The data below shows the annual revenue (in crore rupees) of a company over five years.

Year	Revenue (crore)
2021	120
2022	150
2023	180
2024	200
2025	250

Q7. What was the total revenue over the five years?

A) 850 B) 880 C) 900 D) 950

Q8. What was the percentage increase in revenue from 2021 to 2025?

A) 100% B) 108.3% C) 110% D) 120%

Q9. In which year was the year-on-year growth the highest in absolute terms?

A) 2022 B) 2023 C) 2024 D) 2025

Q10. What is the average annual revenue over the five years?

A) 170 B) 175 C) 180 D) 185

Q11. By what percentage did revenue grow from 2022 to 2023?

A) 18% B) 20% C) 22% D) 25%

Q12. The revenue in 2024 is what fraction of the revenue in 2025?

A) 3/5 B) 4/5 C) 2/3 D) 5/6

Q13. If 2026 revenue grows by 20% over 2025, what will it be?

A) 280 B) 290 C) 300 D) 310

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Set 3: Pie Share (Q14-Q19)

A family's monthly budget of ₹40000 is divided as follows: Rent 30%, Food 25%, Education 20%, Transport 10%, Savings 15%.

Q14. How much is spent on Rent?

A) ₹10000 B) ₹11000 C) ₹12000 D) ₹13000

Q15. How much is spent on Food?

A) ₹9000 B) ₹10000 C) ₹11000 D) ₹12000

Q16. What is the combined amount on Education and Transport?

A) ₹11000 B) ₹12000 C) ₹13000 D) ₹14000

Q17. The amount saved is how much more than the amount on Transport?

A) ₹1000 B) ₹2000 C) ₹3000 D) ₹4000

Q18. What is the ratio of Rent to Savings?

A) 2:1 B) 3:2 C) 5:3 D) 2:3

Q19. If income rises to ₹50000 with the same percentages, how much is now spent on Education?

A) ₹9000 B) ₹10000 C) ₹11000 D) ₹12000

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Set 4: Mixed Computation (Q20-Q25)

A class of 200 students chose electives: Coding 80, Robotics 50, Design 40, Analytics 30.

Q20. What percentage of students chose Coding?

A) 30% B) 35% C) 40% D) 45%

Q21. What is the ratio of Robotics to Design students?

A) 3:2 B) 5:4 C) 4:3 D) 5:3

Q22. How many more students chose Coding than Analytics?

A) 40 B) 45 C) 50 D) 55

Q23. What percentage chose either Design or Analytics?

A) 30% B) 35% C) 40% D) 45%

Q24. If 10 Robotics students switch to Coding, what is the new Coding percentage?

A) 40% B) 42% C) 45% D) 48%

Q25. What fraction of the class did not choose Coding?

A) 2/5 B) 3/5 C) 1/2 D) 7/10

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Answer Key

Q	Ans	Q	Ans	Q	Ans	Q	Ans	Q	Ans
1	C	6	A	11	B	16	B	21	B
2	A	7	C	12	B	17	B	22	C
3	C	8	B	13	C	18	A	23	B
4	D	9	D	14	C	19	B	24	C
5	D	10	C	15	B	20	C	25	B

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Worked Solutions

Set 1: Table Data

Q1. Amit: 40 + 50 + 60 + 50 = 200. Answer: C.

Q2. March sales: Amit 60, Bina 50, Chetan 40, Divya 50, Esha 50. The highest is Amit at 60. Answer: A.

Q3. Bina: 30 + 40 + 50 + 60 = 180, average = 45. Answer: C.

Q4. Totals: Jan 200, Feb 210, Mar 250, Apr 260. Highest is April. Answer: D.

Q5. Esha Jan 20 to Mar 50: increase = 30/20 × 100 = 150%. Answer: D.

Q6. Chetan: 50+50+40+60 = 200. Divya: 60+40+50+50 = 200. Ratio = 1:1. Answer: A.

Set 2: Bar Data

Q7. 120 + 150 + 180 + 200 + 250 = 900. Answer: C.

Q8. (250 - 120)/120 × 100 = 130/120 × 100 = 108.3%. Answer: B.

Q9. YoY jumps: 2022 +30, 2023 +30, 2024 +20, 2025 +50. Highest is 2025. Answer: D.

Q10. Average = 900/5 = 180. Answer: C.

Q11. (180 - 150)/150 × 100 = 30/150 × 100 = 20%. Answer: B.

Q12. 200/250 = 4/5. Answer: B.

Q13. 250 × 1.2 = 300. Answer: C.

Set 3: Pie Share

Q14. Rent = 30% of 40000 = 12000. Answer: C.

Q15. Food = 25% of 40000 = 10000. Answer: B.

Q16. Education 20% + Transport 10% = 30% of 40000 = 12000. Answer: B.

Q17. Savings 15% = 6000, Transport 10% = 4000. Difference = 2000. Answer: B.

Q18. Rent 30% to Savings 15% = 30:15 = 2:1. Answer: A.

Q19. Education = 20% of 50000 = 10000. Answer: B.

Set 4: Mixed Computation

Q20. Coding 80 of 200 = 40%. Answer: C.

Q21. Robotics 50 to Design 40 = 50:40 = 5:4. Answer: B.

Q22. Coding 80 minus Analytics 30 = 50. Answer: C.

Q23. Design 40 + Analytics 30 = 70 of 200 = 35%. Answer: B.

Q24. New Coding = 80 + 10 = 90 of 200 = 45%. Answer: C.

Q25. Did not choose Coding = 200 - 80 = 120 of 200 = 3/5. Answer: B.

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Score Interpretation

Score	Performance	Recommendation
21-25	Excellent	DI is a strength
18-20	Good	Build approximation speed
13-17	Average	Drill percentage and ratio fluency
Below 13	Needs Work	Strengthen arithmetic basics first

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DI Speed Method

Data interpretation is arithmetic under time pressure, so the winning habit is approximation. Candidates report that reading the question before the data, rounding numbers, and eliminating options by magnitude beats exact calculation on most questions. Compute precisely only when two options are close. The underlying skill is percentage and ratio fluency, which transfers directly from the quantitative section.

Core DI Techniques You Must Master

1. Percentage change without long division

For a value rising from A to B, the percentage change is (B - A)/A multiplied by 100. The trap is dividing by B instead of A. Always divide by the starting value. When the numbers are ugly, round both to the nearest ten first, get an approximate answer, then check which option is closest. For example, a rise from 120 to 250 is roughly 130 over 120, which is just over 100 percent, so any option near 108 percent is the target and anything near 50 percent is a magnitude error you can eliminate instantly.

2. Reading the right cell first

Table DI punishes students who scan the entire grid. Read the question, identify the exact row and column you need, and ignore everything else. In the sales table above, a question about Bina's average needs only Bina's row, not the other four. Training yourself to jump straight to the relevant cells is the single biggest time saver in table DI.

3. Pie and percentage shares

A pie chart or percentage budget question is almost always a single multiplication: the share percentage times the total. Education at 20 percent of forty thousand is eight thousand, found in one step. Combined shares simply add the percentages first, then multiply once. Never compute each slice separately when the question asks for a combination.

4. Ratios from raw counts

When a question asks for a ratio, write both raw numbers and cancel by their common factor. Robotics 50 to Design 40 cancels by ten to give 5 to 4. Do not convert to decimals first; the cancellation is faster and avoids rounding mistakes.

5. Approximation and elimination

Most DI options are spread far enough apart that an approximate answer identifies the correct option without exact calculation. Round aggressively, get a ballpark, and eliminate. Reserve exact arithmetic for the rare question where two options sit close together. This discipline is what lets strong candidates finish a DI set in well under the allotted time.

Common DI Traps

Trap	How to avoid it
Dividing by the wrong base in percentage change	Always divide by the starting value
Reading the whole table	Jump to the exact row and column the question needs
Computing each slice in a pie set separately	Add the percentages first, then multiply once
Confusing absolute growth with percentage growth	Read the question wording carefully, they differ
Exact calculation when approximation suffices	Round and eliminate, compute only for close options

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Frequently Asked Questions

What kinds of data interpretation appear in placement tests?

Candidates report table-based DI, bar-data, pie-share, and line-trend sets as the standard formats in TCS NQT, Infosys, and Wipro DI sections. Caselet DI, where data is buried in a paragraph, also appears. This sectional test covers tables, bar data, and pie shares because those are the highest-frequency formats.

How do I get faster at data interpretation?

Read the question before reading the full data set, so you know which numbers you actually need. Candidates report that DI speed comes from approximation: round numbers, eliminate options by magnitude, and only compute exactly when the options are close. Percentage and ratio fluency is the underlying skill.

Is calculator use allowed in DI sections?

Most placement aptitude tests do not allow calculators, so DI rewards mental approximation and quick percentage estimates. Candidates report that practicing fraction-to-percentage conversions and the standard ratio splits is what makes the difference, since DI is mostly arithmetic under time pressure.