Infosys SE / DSE — Aptitude: Pattern, Syllabus & Mock Test
Infosys SE / DSE — Aptitude pattern: 54 questions in 100 minutes across 5 sections. Sample questions, a preparation guide and a free timed mock.
- Pattern: Infosys
- Duration: 100 minutes
- Questions: 54
- Timing: Sectional — each section on its own clock
- Negative marking: None
Five sections with independent cut-offs. A strong quant score will not rescue a weak puzzle score.
- Sectional cut-offs
- No negative marking
- Pseudocode double-weighted
Sections
| Section | Questions | Time | Kind | Marks each |
|---|---|---|---|---|
| Mathematical Ability | 10 | 35 min | Multiple choice | 1 |
| Logical Reasoning | 15 | 25 min | Multiple choice | 1 |
| Verbal Ability | 20 | 20 min | Multiple choice | 1 |
| Pseudocode | 5 | 10 min | Multiple choice | 1 |
| Puzzle Solving | 4 | 10 min | Multiple choice | 1 |
Infosys SE / DSE — Aptitude syllabus
Mathematical Ability
- Number System
- Percentages
- Profit & Loss
- Ratio & Proportion
- Averages
- Problems on Ages
- Time & Work
- Time, Speed & Distance
- Simple & Compound Interest
- Permutations & Combinations
- Probability
- Mixtures & Alligation
- Mensuration
- Tables & Charts
- Caselets
Logical Reasoning
- Number & Letter Series
- Coding & Decoding
- Blood Relations
- Direction Sense
- Syllogisms
- Seating & Puzzles
- Analogies & Classification
- Mathematical Reasoning
Verbal Ability
Pseudocode
Puzzle Solving
Instructions
The Infosys Systems Engineer paper is the one to respect section by section. Every section carries its own percentile cut-off and there is no compensation between them — clearing four and failing one ends the attempt.
- Mathematical Ability is only ten questions but gets thirty-five minutes. They are hard.
- Pseudocode is reported to carry double marks per question, so five questions matter more than their count suggests.
- Puzzle Solving is four questions in ten minutes and is where most candidates run out of time.
- No negative marking.
Some drives append an English writing task; free-text answers are not part of this paper.
How to prepare for this pattern
A guide to the Infosys Systems Engineer aptitude paper, which has to be respected section by section because each section is judged on its own.
What the paper looks like
Five sections, sat in a fixed order: Mathematical Ability, 10 questions in 35 minutes; Logical Reasoning, 15 questions in 25 minutes; Verbal Ability, 20 questions in 20 minutes; Pseudocode, 5 questions in 10 minutes; and Puzzle Solving, 4 questions in 10 minutes. That is 54 questions in 100 minutes. There is no negative marking. In this mock every question is worth one mark; in the real paper Pseudocode is reported to carry double marks per question. Each section has its own clock and closes when you leave it. The paper is not adaptive. Every section carries its own percentile cut-off with no compensation between them, so clearing four sections and failing one ends the attempt.
How to prepare, section by section
- Mathematical Ability is ten hard questions meant to take about three minutes each, mostly quantitative with two on data interpretation. Work the harder questions in Number System, Permutations & Combinations, Probability, Time, Speed & Distance and Mixtures & Alligation, and practise Tables & Charts and Caselets.
- Logical Reasoning splits between Number & Letter Series, Coding & Decoding, Blood Relations and Direction Sense, and the deduction topics such as Syllogisms and Analogies & Classification.
- Verbal Ability is a minute a question: Sentence Correction, Fill in the Blanks & Para Jumbles, Synonyms & Antonyms and Reading Comprehension.
- Pseudocode is C-flavoured: trace it and give the output, or say what it computes. Drill Pseudocode and Programming Fundamentals; the early modules of the C++ study plan cover the C-style syntax it borrows.
- Puzzle Solving is two hard constraint puzzles from Seating & Puzzles and two from Mathematical Reasoning.
The coding route is a different test with its own mock: Infosys SP / DSE — Coding.
On the day
With no negative marking, answer every question in every section. The cut-offs shape the pacing more than the clock does: each section's time is its own, so the risk is not running out of time overall but letting one section slide. Treat each as a pass-or-fail paper in its own right. Mathematical Ability gives three and a half minutes a question, so work each one fully rather than guessing early. Puzzle Solving gives two and a half minutes a puzzle: draw the grid first and fill in every fixed clue before you read the options.
This mock is modelled on the published pattern, whose section counts three prep portals give identically, without the optional English writing task; CodeKairo is not affiliated with Infosys.
Practice questions for the Infosys SE / DSE — Aptitude test
Father thirty years older
A father is 30 years older than his son. In 12 years the father will be three times as old as his son. What is the son's present age?
- 3
- 4
- 5
- 6
Show the answer
A. 3 Worked solution
Three pairs of numbers
The average of 6 numbers is 3.95. The average of two of them is 3.4 and of another two is 3.85. What is the average of the remaining two?
- 4.2
- 4.5
- 4.6
- 4.7
Show the answer
C. 4.6 Worked solution
Doctor is to hospital
Doctor : Hospital :: Teacher : ?
- Student
- School
- Book
- Lesson
Show the answer
B. School Worked solution
A four-generation chain
P is Q's brother, R is Q's mother, S is R's father and T is S's mother. How is P related to T?
- Grandson
- Great-grandson
- Son
- Nephew
Show the answer
B. Great-grandson Worked solution
Shifted, then reversed
If BOOK is coded as LPPC, how is PEN coded?
- QFP
- OFQ
- QFO
- OQF
Show the answer
B. OFQ Worked solution
The purpose of the passage
For most of the twentieth century, sleep was treated as an absence: the hours in which nothing happened. That view has been overturned. The sleeping brain consolidates the day's learning, clears metabolic waste and rehearses motor sequences. What looks like inactivity is in fact a second shift. The practical consequence is uncomfortable for a culture that prizes long hours — cutting sleep to gain working time is a trade that reliably loses more than it gains.
The author's primary purpose is to:
- Correct a common belief and draw a practical conclusion from the correction
- Describe an experiment in detail
- Compare sleep patterns across countries
- Recommend a specific number of hours of sleep
Show the answer
A. Correct a common belief and draw a practical conclusion from the correction Worked solution
A blank after 'despite'
Fill in the blank:
Despite his ______ preparation, he performed poorly in the interview.
- careless
- thorough
- brief
- reluctant
Show the answer
B. thorough Worked solution
Subject–verb agreement
Choose the correct sentence:
- The list of items were on the desk.
- The list of items have been on the desk.
- The list of items are on the desk.
- The list of items is on the desk.
Show the answer
D. The list of items is on the desk. Worked solution
Synonym of PRUDENT
Choose the word closest in meaning to PRUDENT:
- Cautious
- Reckless
- Generous
- Stubborn
Show the answer
A. Cautious Worked solution
A loop that steps by seven
How many times does the body of the loop execute?
Integer i, c
Set c = 0
For i = 5 to 50 step 7
Set c = c + 1
End For
Print c- 6
- 7
- 8
- 9
Show the answer
B. 7 Worked solution
A painted cube cut up
A cube is painted on all faces and then cut into 27 smaller cubes of equal size. How many small cubes have exactly two faces painted?
- 6
- 8
- 12
- 18
Show the answer
C. 12 Worked solution
About this pattern
The 10/35, 15/25, 20/20, 5/10, 4/10 breakdown is corroborated identically by PrepInsta, placementpreparation.io and FACE Prep — the firmest number set of any pattern here. The optional English Writing block is omitted.
Modelled on the published pattern; not affiliated with Infosys. Every sitting draws a fresh paper from the aptitude bank.
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