The NEB Grade 12 Examination: Pattern, Grid and Strategy

This is the examination that decides where you study next. Grade 11 was internal to your school; Grade 12 is a national board paper, and its result is the gate you must pass through before an engineering, medical, management or science entrance examination will even look at you. This chapter is not revision. It is the map: what each paper is made of, how many minutes each mark is worth, what a marker is actually ticking, how to use the 2,000-odd questions in the rest of this book so that they stick, and what your result is worth once the entrance season starts.

1.1 The specification grid of every Grade 12 science subject

A specification grid (विशिष्टीकरण तालिका) is the table the Curriculum Development Centre publishes to fix how a paper is built: how many questions, of what type, carrying what marks, drawn from which content areas. The paper setter is not free to ignore it. That is why a question bank works at all — the shape of the paper is known a year in advance, and only the wording moves.

1.1.1 Written marks, internal marks and the shape of each paper

Subject (code)	Time	Written	Group A / objective	Group B / short	Group C / long	Internal
Physics (1021)	3 hr	75	MCQ 11 × 1 = 11	8 × 5 = 40	3 × 8 = 24	25
Chemistry (3021)	3 hr	75	MCQ 11 × 1 = 11	8 × 5 = 40	3 × 8 = 24	25
Biology (2021)	3 hr	75	MCQ 11 × 1 = 11	8 × 4 = 32	4 × 8 = 32	25
Mathematics (0081)	3 hr	75	MCQ 11 × 1 = 11	8 × 5 = 40	3 × 8 = 24	25
Computer Science (4281)	2 hr	50	MCQ 9 × 1 = 9	5 × 5 = 25	2 × 8 = 16	25 + 25 practical
Compulsory English (0041)	3 hr	75	no groups — 8 questions	—	—	25
अनिवार्य नेपाली (0021)	3 hr	75	no groups — 18 questions	—	—	25

Three things in that table are worth a second look.

Biology is split down the middle. Botany carries 37 marks and Zoology 38, in two sections answered in the same script. Its short answers are worth 4 marks, not 5 — the only subject where that is true — and it has four 8-mark questions, two per section. A Biology candidate who budgets time as if the paper were Physics will run out.

Computer Science is a 50-mark paper inside a 100-mark subject. The written paper is half the subject; 25 marks come from the practical examination and 25 from internal assessment. The written paper is short, dense, and — as the past papers in Chapters 14–16 show — extremely predictable in structure.

English and Nepali have no Group A/B/C at all. English is eight questions; Nepali is eighteen. Neither has a multiple-choice group in the way the science papers do. Chapter 20 of this book is therefore not an MCQ bank: it is a bank of the short objective items the Nepali grid actually tests.

1.1.2 Marks distribution inside English and Nepali

These two are the papers students plan worst, because "75 marks of English" sounds shapeless. It is not. The CDC curriculum for the compulsory subjects fixes the split exactly.

Compulsory English — 75 written marks

Skill area	Marks	Where it appears
Reading	35	Q1 unseen passage 15; Q2 short literary 5 × 2 = 10; Q3 long literary 2 × 5 = 10
Writing	25	Q4 guided writing 7; Q5 functional writing 8; Q6 free writing 10
Grammar	10	Q7, 10 items × 1
Vocabulary	5	Q8, 5 items × 1

अनिवार्य नेपाली — 75 written marks

क्षेत्र	अङ्क	क्षेत्र	अङ्क
अक्षर संरचना	३	पठनबोध	८
वर्णविन्यास	३	बुँदाटिपोट + सारांश	२+३ = ५
पदवर्ग पहिचान	३	पाठगत बोध (उत्तरात्मक)	८
शब्दनिर्माण	३	पाठगत बोध (समीक्षात्मक)	४+४ = ८
कारक-विभक्ति, पदसङ्गति	४	स्वतन्त्र रचना (निबन्ध)	८
काल-पक्ष-भाव-वाच्य	५	प्रतिक्रिया लेखन	४
वाक्यान्तरण	४	व्यावहारिक लेखन	४
		प्रतिवेदन-टिप्पणी	५

Read that Nepali table again. Grammar alone is 25 of the 75 marks — अक्षर संरचना through वाक्यान्तरण — and every one of those items is rule-governed and completely learnable. A student who memorises nothing but grammar and the essay, and reads no पाठ at all, still has 33 marks in reach. A student who reads only the पाठ and skips grammar has capped themselves at 50. This is the single most common planning error in the Nepali paper.

1.1.3 The time budget: every mark is worth 2.4 minutes

Divide the time by the marks and the same number falls out of both paper lengths:

So the rule is universal: an 8-mark question deserves about 19 minutes, a 5-mark question about 12, a 4-mark question about 10, and a 1-mark MCQ about one. But you must also read the paper and check it, so in practice you work slightly faster than 2.4 and bank the difference.

1.2 What the examiner rewards in a 4-, 5- and 8-mark answer

An NEB script is not read and given an impression mark. It is marked against a marking scheme that lists the scoring points, and the marker ticks them. So the question a candidate should ask is never "how much should I write?" but "how many separate ticks can this question carry, and have I given the marker all of them?"

The 4-mark answer (Biology short answer). Four ticks. The usual shapes are definition + three features, four differences in a table, or a labelled diagram (2) + two lines of function (2). A table of four rows is the safest form because the marker can see the four points without hunting. Never write a 4-mark Biology answer as continuous prose if a table will do.

The 5-mark answer (Physics, Chemistry, Maths, Computer Science; also the long literary answers in English). Five ticks, and the paper usually tells you how they split — you will see (1+4), (2+3) or (5) printed after the question. Obey the split. For a numerical, the ticks are almost always:

1. the correct formula or principle, written down before any numbers;
2. correct substitution with consistent units;
3. the algebra, one step per line;
4. the numerical answer;
5. the unit and a sentence saying what the answer means.

A candidate who writes only the final number has done the hard part and earned one mark out of five.

The 8-mark answer (Group C). Eight ticks is too many to find by writing harder. Every NEB 8-mark question is therefore already divided — either printed as (a) and (b), or as a mark split like (2+6), (5+3), (3+5). Both the 2079 and 2080 Computer Science papers did this to every Group C question. Your answer must show the same division. Write (a) and (b) as headings, and inside each part give the marker the structure the verb demands:

Command word	What the marker is ticking
Define	the exact wording, in one sentence
State	the fact alone — no explanation needed, and none rewarded
Explain / Describe	statement plus the reason, for each point
Derive	every algebraic step, labelled; the result alone earns little
Differentiate / Compare	a table, with a named basis of comparison for each row
Draw / Sketch	a clean labelled diagram; unlabelled diagrams score nearly nothing
Justify / To what extent	a position, then evidence, then a concession

Worked example 1.2 — the same 5 marks, answered two ways

Problem. "A host has IP address 172.16.45.9 with mask 255.255.0.0. State its class, network address, broadcast address and the number of usable hosts. Also distinguish an IP address from a MAC address." [5]

A weak answer (scores 2). "It is class B. Hosts = 65534. IP address is logical and MAC address is physical."

Everything written is true. But the question named five things — class, network address, broadcast address, host count, and a distinction — and two of them were never answered. Two ticks.

A full-mark answer (scores 5).

1. The first octet is 172, which lies in 128–191, so the address is class B. [1]
2. The mask 255.255.0.0 makes the first two octets the network, so the network address is 172.16.0.0. [1]
3. Setting all host bits to 1 gives the broadcast address 172.16.255.255. [1]
4. There are 16 host bits, so usable hosts = 2^{16} - 2 = 65{,}534 (two addresses are reserved for network and broadcast). [1]
5. An IP address is a 32-bit logical address assigned by software and changed when the host joins another network; a MAC address is a 48-bit physical address burned into the NIC and never changed. [1]

What changed. Not the knowledge — the accounting. The second answer walks the marker through five numbered ticks in the order the question asked for them. It is also shorter to write than a page of prose.

1.3 How to use a question bank: retrieval practice, spacing and timed papers

Most students use a question bank wrongly: they read the question, feel a flicker of recognition, read the model answer, feel satisfied, and move on. That produces fluency without learning. The research on this is unusually clear, and it is worth knowing the actual findings rather than the slogans.

Finding 1 — testing yourself beats re-reading, and the gap grows with time. Roediger and Karpicke (Psychological Science, 2006) had students learn prose passages either by studying them four times, or by studying once and then recalling them from memory three times. Tested five minutes later, the re-readers were ahead: about 83% recalled against 71%. Tested one week later the result reversed sharply — the re-readers had fallen to about 40%, while the students who had practised retrieving held about 61%. Re-reading feels better and performs worse. Karpicke and Roediger reported the same pattern in Science in 2008 under the title "The critical importance of retrieval for learning."

Finding 2 — spreading practice out beats cramming it. Cepeda, Pashler, Vul, Wixted and Rohrer (Psychological Bulletin, 2006) meta-analysed 254 studies covering more than 14,000 participants and found distributed practice reliably beat massed practice. A follow-up (Cepeda and colleagues, Psychological Science, 2008, 1,354 participants) found the best gap between study sessions grows with how long you need to remember: roughly 10–20% of the retention interval. Your board examination is a few months away, so the arithmetic is blunt — if the exam is 20 weeks off, revisit a unit every 2 to 4 weeks, not every day and not once.

Finding 3 — these two techniques are the ones that actually work. Dunlosky, Rawson, Marsh, Nathan and Willingham (Psychological Science in the Public Interest, 2013) reviewed ten popular study techniques and rated only two as high utility: practice testing and distributed practice. Highlighting, re-reading and summarising were rated low utility — not useless, but far weaker than students believe. This book is built around the two that won.

Timed past papers are a separate exercise. Do not mix them with question practice. From about eight weeks out, sit one complete paper a week under real conditions: the real clock, no notes, no phone, no pausing, one answer sheet, and the whole paper in one sitting. Then mark it against the scoring points harshly. The purpose is not to learn content — you already have that — it is to find out what your handwriting speed, your nerves and your time budget actually do to you for three hours, while there is still time to fix it. The two model sets in Chapters 16, 19 and 22 are built for exactly this.

1.4 The ways candidates actually lose marks

Almost none of these are about not knowing the subject.

The mistake	What it costs	The fix
Leaving a question blank	An unattempted 8-mark Group C question is 10.7% of a 75-mark paper — more than a full grade band	Write something structured. A definition and a labelled diagram on a question you half-know beats a clean blank every time.
Ignoring the mark split	A (2+6) question answered entirely as one essay on part (a) caps you at 2	Copy (a) and (b) as headings before you start writing.
Attempting both halves of an OR	12–20 minutes gone, no extra marks — only the first attempt is marked	Decide in the first 60 seconds, strike out the other, never look back.
No formula line in a numerical	1–2 marks per question, every question	Write the formula, then substitute, then solve. Three lines minimum.
Missing units	1 mark per numerical, silently	Units on the substitution and on the final answer.
Unlabelled diagrams	Most of the diagram's marks	Every diagram gets a title and labelled parts. A network topology with no node labels earns almost nothing.
Prose where a table was asked	Markers cannot find your points, so they do not tick them	"Differentiate", "Compare", "Distinguish" always mean a table with a named basis per row.
Ignoring the word limit	An English essay asked at ~300 words and written in 120 cannot reach 10	Count roughly: 10 words a line, so 300 words is about 30 lines. Plan four paragraphs.
Answering the Nepali paper in English	The answer is not marked	The whole of the नेपाली script must be in Nepali.
Mis-numbering answers	The marker marks Q11 against the Q12 scheme	Write the question number large, in the margin, before the answer.
Running out of time on Group C	The last 8-mark question gets 4 minutes	Protect your budget. If a question overruns by five minutes, leave a gap and move on; come back in the checking time.
"Everything I know about the topic"	Nothing extra — and time stolen from later questions	Five ticks, then stop. Length is not a scoring point.

1.5 What rides on the result: entrance examinations and admission

Here is the honest position, stated only as far as the official sources go.

Your Grade 12 result is usually an eligibility gate, not a ranking score. For the two biggest technical entrances in Nepal, the merit list is built from the entrance examination; the board result decides only whether you may sit it.

IOE — Institute of Engineering, Tribhuvan University (BE / BArch). The IOE admission page states the entrance is a computer-based test of 100 multiple-choice questions, full marks 140, duration 2 hours, with 10% negative marking for each wrong answer, covering mathematics, physics, chemistry and English. Eligibility from the 10+2 Science route requires at least grade C in all subjects, with Physics, Chemistry and two papers of Mathematics (200 marks). That last clause matters: a science student who dropped Mathematics is not eligible for IOE, however good the rest of the result.

MECEE-BL — Medical Education Commission (MBBS, BDS, BSc Nursing / BSc Midwifery, BASLP, B Perfusion Technology). The Commission's published syllabus gives the format precisely: 200 single-best-response MCQs with four options, full marks 200, 3 hours, with 0.25 marks deducted for every wrong answer, and a qualifying mark set at the 50th percentile (the 2082 review replaced the earlier fixed 50% pass mark with this norm-referenced rule). Eligibility is 10+2 Science or equivalent with Physics, Chemistry and Biology, and 50% aggregate or GPA 2.4. The subject weighting is fixed:

Subject	Questions
Physics	50
Chemistry	50
Zoology	40
Botany	40
Mental Agility Test	20
Total	200

Two details in that document are worth acting on. The paper is written to a difficulty ratio of 50:30:20 — recall : understanding : application, so half the paper is straight factual recall of the Grade 11 and 12 syllabus. And the question stem is capped at 60 words, so these are short, dense items, not comprehension puzzles.

Other routes. Tribhuvan University's Faculty of Management runs CMAT for BBA / BIM / BBM / BHM, and Kathmandu University and other universities run their own entrance tests. I was not able to reach an official page giving the current structure of these, so this book states nothing about their format — check fom.tu.edu.np and the university's own admission notice for the year you apply, and do not trust a coaching-centre summary of them.

Chapter summary

• Every Grade 12 subject totals 100: 75 written + 25 internal, except Computer Science, which is 50 written + 25 practical + 25 internal.
• Group patterns: Physics / Chemistry / Maths 11 MCQ + 8 × 5 + 3 × 8; Biology 11 MCQ + 8 × 4 + 4 × 8 split across Botany 37 and Zoology 38; Computer Science 9 MCQ + 5 × 5 + 2 × 8 in 2 hours.
• English has no groups: 8 questions, Reading 35, Writing 25, Grammar 10, Vocabulary 5. Nepali has 18 questions, of which 25 marks are pure grammar.
• Every written mark is worth about 2.4 minutes; work at about 2.1 and bank the rest for checking.
• One mark ≈ one distinct scoring point. Answer the number of things the question names, in the order it names them, obeying any printed (a) /(b) or (2+6) split.
• Retrieval beats re-reading, and the advantage grows with delay: 61% against 40% at one week (Roediger & Karpicke, 2006).
• Space revision at roughly 10–20% of the time to the exam — every 2 to 4 weeks for a 20-week horizon (Cepeda et al., 2006, 2008).
• Practice testing and distributed practice are the only two techniques rated high utility by Dunlosky et al. (2013); highlighting and re-reading are rated low.
• Marks are lost to blanks, ignored mark-splits, both halves of an OR, missing formulae and units, unlabelled diagrams, prose instead of tables, and ignored word limits — not to ignorance.
• The board result is an eligibility gate: IOE needs grade C in all subjects with two Maths papers; MECEE-BL needs 50% aggregate or GPA 2.4. Admission rank comes from the entrance score.

Sources reached for this chapter

Examination pattern and marks: NEB Grade 12 past papers 2079 and 2080 (subject codes 4281, 0041, 0021) and the CDC Curriculum for Grades 11 and 12, Compulsory Subjects, 2076, which carries the English (Reading 35 / Writing 25 / Grammar 10 / Vocabulary 5) and Nepali mark-allocation tables. IOE: the Institute of Engineering undergraduate BE admission page, ioe.tu.edu.np, read 2026-09-28. MECEE-BL: Medical Education Commission, Syllabus for Bachelor Level Common Entrance Examination 2020, third revision dated 28 April 2026, published at mec.gov.np. Cognitive science: Roediger & Karpicke, Psychological Science 17(3), 2006; Karpicke & Roediger, Science 319, 2008; Cepeda, Pashler, Vul, Wixted & Rohrer, Psychological Bulletin 132(3), 2006; Cepeda et al., Psychological Science 19(11), 2008; Dunlosky, Rawson, Marsh, Nathan & Willingham, Psychological Science in the Public Interest 14(1), 2013. Not verified: no standalone CDC specification grid for Grade 11–12 Compulsory English, Nepali or Computer Science could be reached; the grids above are taken from the curriculum documents and from the papers themselves. The current CMAT structure could not be verified from an official source and is therefore not stated.

Practice questions

Group A — Do you know your own paper? (1 mark each)

1. In the Grade 12 Biology paper, a short-answer question carries [1]a2 marksb4 marksc5 marksd8 marks
2. How many marks does the Computer Science written paper carry? [1]a40b50c75d100
3. In Compulsory English, the unseen reading passage (Q1) is worth [1]a10b12c15d20
4. In अनिवार्य नेपाली, the total marks carried by grammar items (अक्षर संरचना through वाक्यान्तरण) is [1]a15b20c25d30
5. Approximately how many minutes should an 8-mark Group C question receive? [1]a8b12c19d30
6. In the MECEE-BL entrance examination, a wrong answer costs [1]anothingb0.25 marksc0.5 marksd1 mark
7. The IOE entrance examination carries full marks of [1]a100b120c140d200
8. Which pair of study techniques did Dunlosky et al. (2013) rate as high utility? [1]ahighlighting and summarisingbpractice testing and distributed practicecre-reading and imagerydkeyword mnemonics and rereading

Answers to Group A

1. (b) — Biology alone uses 4-mark short answers, 8 per section.

2. (b) — 50 written, plus 25 practical and 25 internal.

3. (c) — 15 of the 35 reading marks.

4. (c) — 3+3+3+3+4+5+4 = 25, a third of the paper.

5. (c) — 8 marks × 2.4 min ≈ 19 minutes.

6. (b) — 0.25 deducted per wrong response, per the MEC syllabus.

7. (c) — 100 questions, 140 marks, 2 hours.

8. (b) — the only two of the ten reviewed techniques rated high utility.

Group B — Plan your own examination (5 marks each)

1. Write out the full question-by-question time budget you will use for your Physics paper, in minutes, and show that it sums to 180 with at least 15 minutes of checking time left. [5]
2. Take any one 8-mark question from Chapter 16 of this book. Without answering it, write down the eight separate scoring points you believe the marking scheme contains. [5]
3. Using the 10–20% spacing rule, build a revision calendar for all seven Computer Science units across the weeks remaining before your examination. State your retention interval and the gap you derived from it. [5]
4. List five ways you personally have lost marks in your school terminal examinations, and write the one-line fix for each. [5]

Answers to Group B

1. A workable budget: read 5, Group A 12, Group B 8 × 11 = 88, Group C 3 × 20 = 60, check 15. Total 5+12+88+60+15 = 180. Note that Group C is given 20 minutes rather than the full 19.2 it is "worth", paid for by finishing the MCQs in 12 minutes instead of 26.

2. A correct answer here is a list of eight nouns, not prose — for example, for "Explain the OSI reference model with a diagram (5) and compare it with TCP/IP (3)": diagram, seven layer names, function of each, one protocol per layer, then three named bases of comparison. If you cannot reach eight, re-read the question; you have missed a part.

3. With 20 weeks (140 days) the gap is 14–28 days, so 4–5 passes per unit. Offset the seven units by one week each so that in any given week you are touching two units, one for the first time and one on a later pass.

4. Model answer shape: "I wrote the answer but not the units — put units on the substitution line and the final line. I answered both halves of an OR — decide in 60 seconds and cross the other out. …" The value of this question is that the list is yours; a generic list scores nothing.

Group C — Long answer (8 marks each)

1. (a) Draw up the specification grid of any three Grade 12 science-stream subjects side by side, showing time, written marks, number of questions in each group, and marks per question. [5](b) Explain why the same 2.4 minutes-per-mark figure applies to both the 3-hour and the 2-hour papers, and what a candidate should do with the difference between 2.4 and the 2.1 recommended in this chapter. [3]

2. (a) Describe, with the experimental evidence, why attempting a question before reading its answer produces better retention than reading the answer first. [5](b) A friend tells you they revise by re-reading their notes three times the night before. Explain what the research predicts will happen to them, and what you would tell them to do instead. [3]

Answer outline to Group C

1(a). Any three rows of the table in §1.1.1, with the columns time / written marks / Group A / Group B / Group C, e.g. Physics 3 hr, 75, 11 × 1, 8 × 5, 3 × 8; Biology 3 hr, 75, 11 × 1, 8 × 4, 4 × 8 across two sections; Computer Science 2 hr, 50, 9 × 1, 5 × 5, 2 × 8. One mark per correctly completed row, two for a correct and complete table layout. 1(b). Because NEB fixes the same ratio in both: 180/75 = 120/50 = 2.4. The difference between 2.4 and 2.1 is deliberate slack — about 22 minutes on a 3-hour paper — and it should be spent on (i) reading the paper before writing, (ii) the questions that cannot be answered quickly, such as an essay or a derivation, and (iii) a real checking pass at the end, in that order. 2(a). Retrieval strengthens the memory trace, whereas reading it only re-exposes you to it. Roediger and Karpicke (2006) showed the crossover directly: re-reading led at a five-minute delay (≈83% vs 71%) but lost at one week (≈40% vs 61%). Reading the answer first feels easier precisely because it removes the effortful retrieval that produces the learning — the effort is the mechanism. Credit for naming the study, quoting the direction of the effect, and explaining why the short-delay result misleads students. 2(b). The research predicts high confidence and poor retention: massed practice and re-reading both perform well on an immediate test and poorly after a delay, and re-reading was rated low utility by Dunlosky et al. (2013). Advice: close the notes, attempt questions from memory, mark them against the scoring points, and — for anything still needed in a week's time — space the repeats two to four weeks apart rather than stacking them into one night.