ISRO ISTRAC Exam Pattern 2026; Latest Syllabus, Marking Scheme & Preparation Strategy

Hello friends! The official notification for the ISRO ISTRAC Recruitment 2026 has been released, and there is significant interest in the details. According to the official notification, the online application process began on June 27, 2026, and the deadline to apply is July 20, 2026. The advertisement number for this recruitment is ISTRAC:02:2026, and the notification primarily covers 26 vacancies.

Working at ISRO is a dream for many, and this recruitment offers a great opportunity for those who have already been preparing for such roles. A key challenge of the written examination is the negative marking system; specifically, three marks will be deducted for every incorrect answer.

This makes the exam quite challenging; however, it is certainly worth attempting, especially if you have been preparing for this or other difficult competitive exams.

The recruitment covers various positions, primarily Technical Assistant, Scientific Assistant, and Library Assistant, among others. The vacancies have been announced based on pay scales and specific qualification requirements.

We have also recommended some books that can help you enhance your knowledge and accelerate your preparation. You should study the prescribed subjects thoroughly and carefully review the exam pattern to plan your preparation effectively.

ISRO ISTRAC Recruitment 2026 Overview

Recruitment Name ISRO ISTRAC Recruitment 2026
Conducting Organization ISRO Telemetry, Tracking and Command Network (ISTRAC), Indian Space Research Organisation (ISRO)
Advertisement Number ISTRAC:02:2026
Posts Offered Technical Assistant, Scientific Assistant, Library Assistant-A, Technician-B, Draughtsman-B, Cook-A
Application Mode Online
Online Application Start Date 27 June 2026
Last Date to Apply 20 July 2026
Selection Process Written Test, Skill Test (where applicable), Document Verification, Medical Examination
Official Website isro.gov.in
Job Location Various ISRO/ISTRAC Centres across India

ISRO ISTRAC Selection Process 2026

The selection process is expected to include the following stages:

  1. Written Examination / Computer-Based Test (CBT)
  2. Skill Test / Trade Test (for applicable posts)
  3. Document Verification
  4. Medical Examination
  5. Final Merit List

Note: The Skill Test is qualifying in nature for many technical posts, while the final merit is generally prepared based on the performance in the written examination, subject to qualifying all other stages. Candidates should check the official notification for post-wise selection criteria.

read more; WBPSC ICDS Supervisor Salary 2026

ISRO ISTRAC Exam Pattern 2026

Exam Mode Offline Written Examination (Objective Type)*
Question Type Multiple Choice Questions (MCQs)
Medium of Exam English
Duration 90 Minutes (1 Hour 30 Minutes)
Total Questions 80 Questions
Maximum Marks 100 Marks
Sections Part A (Subject/Trade) & Part B (Aptitude/General Awareness)
Marks for Each Correct Answer +1 Mark
Marks for Unattempted Questions 0 Mark
Negative Marking −1/3 mark for each incorrect answer
Negative Marking Not specifically mentioned in the latest notification
Qualifying Stage Candidates shortlisted based on written exam; Skill Test (where applicable) is qualifying in nature.
ote: The latest ISRO ISTRAC Recruitment 2026 notification confirms a written test followed by a Skill Test (for applicable posts). The exact distribution of questions and marks may vary slightly depending on the post (Technical Assistant, Technician-B, Scientific Assistant, etc.), so mention in your article that candidates should check the post-wise details in the official notification.

ISRO ISTRAC Syllabus 2026

  • Technical Assistant Syllabus
  • Scientific Assistant Syllabus
  • Library Assistant-A Syllabus
  • Technician-B Syllabus
  • Draughtsman-B Syllabus
  • Cook-A Syllabus
  • General Aptitude Syllabus
  • General Awareness Syllabus
  • English Language Syllabus
  • Reasoning & Basic Mathematics Syllabus

The official notification confirms multiple post categories, and the technical syllabus varies according to the discipline/post applied for.

Subject-wise Syllabus

  • Technical Subject
  • General Aptitude
  • General Awareness
  • Logical Reasoning
  • Quantitative Aptitude
  • English Language
  • Basic Computer Knowledge (if applicable)

Post-wise Syllabus

  • Technical Assistant (Electronics)
  • Technical Assistant (Mechanical)
  • Scientific Assistant (Computer Science)
  • Scientific Assistant (Mathematics)
  • Library Assistant-A
  • Technician-B (Electronics Mechanic)
  • Technician-B (Carpenter)
  • Draughtsman-B (Civil)
  • Draughtsman-B (Mechanical)
  • Cook-A

read more; BOB Apprentice Syllabus 2026

Best Books for Preparation

  • NCERT Books (Class 9–12)
  • Lucent’s General Knowledge
  • Quantitative Aptitude by R.S. Aggarwal
  • A Modern Approach to Verbal & Non-Verbal Reasoning by R.S. Aggarwal
  • Objective General English by S.P. Bakshi
  • Arihant General Science
  • Previous Year ISRO Question Papers
  • Technical Subject Books (According to Your Post/Discipline)
  • Mock Tests & Practice Sets
  • ISRO Recruitment Preparation Guide (Latest Edition)

ISRO ISTRAC Preparation Tips 2026

  • Understand the latest syllabus and exam pattern.
  • Prepare a realistic daily study schedule.
  • Focus more on your technical subject.
  • Revise General Aptitude and General Awareness regularly.
  • Solve previous year ISRO question papers.
  • Attempt mock tests every week.
  • Improve speed and accuracy through timed practice.
  • Make short notes for quick revision.
  • Revise important formulas and concepts frequently.
  • Stay updated with official ISRO recruitment notifications.
apply  online click  here 
notification download click  here 

FAQs on ISRO ISTRAC Syllabus & Exam Pattern 2026

1. Is the ISRO ISTRAC syllabus the same for all posts?

No. The technical portion of the syllabus varies depending on the post you apply for. For example, candidates applying for Technical Assistant, Scientific Assistant, Technician-B, or Draughtsman-B will have different subject-specific topics. However, sections like General Aptitude, Reasoning, and General Awareness may be common for several posts.

2. Does the ISRO ISTRAC exam have negative marking?

Yes. According to the latest recruitment notification, one-third (1/3) mark is deducted for every incorrect answer in the written examination. There is no penalty for questions left unanswered.

3. What is the duration of the ISRO ISTRAC written examination?

The written examination is conducted for 90 minutes. Candidates should practice solving questions within the allotted time to improve speed and accuracy before the exam.

4. Is the Skill Test mandatory for all candidates?

The Skill Test is conducted only for posts where it is applicable, such as Technician-B and certain other technical positions. It is generally qualifying in nature, and candidates must clear it to be considered for the final merit list.

5. Which subjects should candidates focus on for better scores?

Candidates should give maximum attention to their core technical subject, as it carries significant weight in the written examination. Along with this, regular preparation of General Aptitude, Logical Reasoning, English, and General Awareness can improve the overall score.

6. Are previous year question papers useful for ISRO ISTRAC preparation?

Yes. Solving previous year ISRO recruitment papers helps candidates understand the exam pattern, question difficulty, important topics, and time management. It is one of the most effective ways to prepare for the examination.

7. Is the ISRO ISTRAC syllabus based on the diploma or degree level?

It depends on the post. For Technical Assistant and Scientific Assistant posts, the technical syllabus is generally based on the relevant Diploma or Bachelor’s degree discipline prescribed in the eligibility criteria. Candidates should study the subjects related to their respective branch.

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