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ISRO Scientist/Engineer — SC (CS/ECE/Mechanical) — Free Online Mock Test

ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.

Elite India Government & Civil Service 80 questions 90 min 50 distinct variants
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ISRO Scientist/Engineer exam at a glance

80
Questions
90
Minutes total
1
Section
50
Variants

ISRO Scientist/Engineer section breakdown

The ISRO Scientist/Engineer mock test on Wrexa Edge replicates the real exam's section structure — same names, same question count per section, same time limits. No inter-section breaks — the timer runs continuously.

ISRO Scientist/Engineer scoring & marking scheme

+3
Per correct answer
-1
Per wrong answer
0
Per blank / skipped
0–240
Scaled score range

Strategy: ISRO Scientist/Engineer penalises wrong answers (-1 per mistake). Skip a question if you cannot eliminate at least 2 options — guessing blindly hurts your scaled score more than blanking.

Scale: ISRO Scientist (out of 240).

How ISRO Scientist/Engineer is conducted

ISRO Scientist/Engineer time strategy

With 80 questions in 90 minutes, you have about 68 seconds per question on average. Successful candidates aim for the following pacing on each section:

Wrexa Edge's analytics show your actual time-per-question after every mock so you can spot which sections you're losing time on.

ISRO Scientist/Engineer topics covered

Across the 50 Wrexa Edge variants of ISRO Scientist/Engineer, the following topics appear most often (sample distribution from one variant):

ISRO SC (80 Q)

Sample ISRO Scientist/Engineer questions

A preview of real practice questions from the Wrexa Edge ISRO Scientist/Engineer bank — the same style, phrasing and difficulty you'll face on test day. Full solutions unlock free inside the mock.

ISRO SC (80 Q) · Math — Series
Q1. NUMERICAL: The Taylor series of e^x about x=0 is:
Why: Correct answer: D — 1 + x + x²/2! + x³/3! + … = Σ x^n / n!. Topic: Math — Series.
ISRO SC (80 Q) · Prob — Basics
Q2. NUMERICAL: A fair die is rolled. The probability of rolling a 4 OR a 6 is:
Why: Correct answer: A — 1/3 — P(4) + P(6) = 1/6 + 1/6. Topic: Prob — Basics.
ISRO SC (80 Q) · Prob — Independence
Q3. NUMERICAL: Two events A and B are independent with P(A)=0.3 and P(B)=0.4. P(A ∩ B) =
Why: Correct answer: B — 0.12 — independence ⇒ P(A)·P(B). Topic: Prob — Independence.
ISRO SC (80 Q) · Stats — Mean
Q4. NUMERICAL: Mean of the dataset {2, 4, 4, 4, 5, 5, 7, 9}:
Why: Correct answer: C — 5 — (2+4+4+4+5+5+7+9)/8 = 40/8. Topic: Stats — Mean.
ISRO SC (80 Q) · Stats — SD
Q5. NUMERICAL: Sample standard deviation s of {2, 4, 4, 4, 5, 5, 7, 9} (n=8, x̄=5):
Why: Correct answer: D — ≈2.14 — Σ(x−x̄)²/(n−1) = 32/7 ≈ 4.57; √4.57 ≈ 2.14. Topic: Stats — SD.
ISRO SC (80 Q) · Stats — Normal
Q6. In a normal distribution, approximately what percentage of the data falls within ±1σ of the mean?
Why: Correct answer: A — 68% (68.27% exactly). Topic: Stats — Normal.

These are a handful of the 4000 unique ISRO Scientist/Engineer questions across all 50 Wrexa Edge variants — start a free mock to attempt the full set with instant scoring.

ISRO Scientist/Engineer difficulty calibration

Elite tier. Elite-tier: among the toughest exams in its category. Most successful candidates prepare for 6-12+ months.

ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.

Verified content — Wrexa Edge's ISRO Scientist/Engineer bank has been deeply curated with real exam-aligned content (estimated 100% syllabus coverage).

How Wrexa Edge prepares you for ISRO Scientist/Engineer

ISRO Scientist/Engineer study plan

A phase-by-phase roadmap from your first concept to test-ready. Stretch or compress each phase to fit the time you have before your attempt.

1 Phase 1 — Learn the syllabus Weeks 1–4
  • Work through every section — ISRO SC (80 Q) — from your core study material
  • Make short notes and a formula/fact sheet you can revise quickly
  • Attempt topic questions right after finishing each area
2 Phase 2 — Practice & sectionals Weeks 5–8
  • Solve previous-year and practice questions section by section
  • Time yourself on ISRO SC (80 Q) and your weakest areas
  • Keep an error log and revisit every mistake weekly
3 Phase 3 — Full-length mocks Weeks 9–12
  • Take full-length ISRO Scientist/Engineer mocks in the real test interface
  • Analyse accuracy, time per question and silly mistakes after each mock
  • Revise from notes and re-attempt only weak-topic questions

Where ISRO Scientist/Engineer can take you

A strong ISRO Scientist/Engineer result opens up these careers and higher-study paths:

Frequently asked questions

What is the ISRO Scientist/Engineer exam pattern?
ISRO Scientist/Engineer — SC (CS/ECE/Mechanical) contains 80 questions across 1 section: ISRO SC (80 Q). Total duration is 90 minutes (about 68 seconds per question).
Does ISRO Scientist/Engineer have negative marking?
Yes — ISRO Scientist/Engineer carries negative marking of -1 per wrong answer and 3 per correct answer. Skipping is safer than guessing blindly.
How is ISRO Scientist/Engineer scored?
Scaled score range: 0 to 240. ISRO Scientist (out of 240).
How can I practise ISRO Scientist/Engineer online for free?
Wrexa Edge gives you 10 free full-length ISRO Scientist/Engineer mock tests — with instant scoring, detailed explanations and analytics — plus 40 more with Pro. Start practising in under a minute, no card required.
What is the difficulty level of ISRO Scientist/Engineer?
ISRO Scientist/Engineer is rated Elite difficulty on Wrexa Edge. Elite-tier: among the toughest exams in its category. Most successful candidates prepare for 6-12+ months. ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.
How long is the ISRO Scientist/Engineer exam?
ISRO Scientist/Engineer runs for 90 minutes total. On Wrexa Edge the timer is enforced exactly as on the real exam — including no inter-section breaks.
What topics are covered in ISRO Scientist/Engineer?
ISRO Scientist/Engineer is split into: ISRO SC (80 Q). Each section is timed and weighted separately. ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.
What tools or aids are allowed during ISRO Scientist/Engineer?
No special tools are required.
Is the ISRO Scientist/Engineer test adaptive?
No — ISRO Scientist/Engineer is a fixed-form (linear) test. Every candidate sees the same number of questions per section.
How many ISRO Scientist/Engineer mock tests does Wrexa Edge offer?
Wrexa Edge generates 50 distinct ISRO Scientist/Engineer variants — each with different question content, not just shuffled options — the first 10 free for everyone and 40 more with Pro. That's 4000 unique practice questions in the real test-day interface.
Is there a free ISRO Scientist/Engineer test series 2026?
Yes. The Wrexa Edge ISRO Scientist/Engineer test series for 2026 gives you 10 free full-length mock tests (50 in total) plus subject-wise and topic-wise tests — instant scoring and detailed analysis, no card required.
Are ISRO Scientist/Engineer previous year question–style papers included?
Every ISRO Scientist/Engineer mock is modelled on the official exam pattern and the style of previous years' papers — the same 80-question structure, sections and marking — so your practice mirrors the real paper you'll sit.
Which is the best free ISRO Scientist/Engineer mock test online?
Wrexa Edge's ISRO Scientist/Engineer mock test replicates the real exam interface, timing and negative marking, with instant score, section-wise analysis and 50 fresh variants — a strong free choice for 2026 preparation.
Can I take the ISRO Scientist/Engineer mock test on mobile?
Yes. ISRO Scientist/Engineer mock tests run in any browser on mobile, tablet or desktop — no app or download needed. Start on your phone and your progress and analytics sync when you sign in.
What is the ISRO Scientist/Engineer syllabus?
The ISRO Scientist/Engineer syllabus maps to its 1 section: ISRO SC (80 Q). Wrexa Edge's mock tests cover the complete syllabus topic by topic — see the topics-covered breakdown above — so you practise every area at real exam difficulty.
What is the eligibility for ISRO Scientist/Engineer?
Eligibility for ISRO Scientist/Engineer — age, qualification and number of attempts — is set by the official conducting body and can change each cycle, so always confirm the current official notification before applying. Wrexa Edge focuses on realistic ISRO Scientist/Engineer practice: 10 free full-length mocks in the exact exam pattern, ready whenever you are.
When is the ISRO Scientist/Engineer exam and how should I prepare?
Official ISRO Scientist/Engineer exam dates are announced by the conducting body for each cycle — check the latest notification for the current schedule. To be ready, follow a phased study plan and take full-length timed mocks; Wrexa Edge gives you 10 free ISRO Scientist/Engineer mocks with instant scoring so you can track your readiness week by week.

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