DSSSB JE Exam common mistakes
DSSSB JE Exam · Understand the traps and how to avoid them.
In the Arithmetical and Numerical Ability section, spending more than roughly 90 seconds on a single calculation-heavy question (long division, messy percentage chains) instead of skipping it and returning later.
The section is scored per question with no sectional time pressure during the paper, so candidates try to 'finish' each question in order and lose the easy marks at the end of the section. Arithmetic questions vary wildly in length, and the early ones are often the longest.
What to do instead
Adopt a two-pass rule: on the first pass, answer only questions solvable within about 45-60 seconds; mark the rest and return. Practise with a stopwatch on 25-question mixed sets and record time per question so you can feel when to abandon a question.
Applying the wrong operation to percentage/ratio word problems, e.g. computing 15% of a price and subtracting it when the question asks for the price after a 15% increase on the discounted value, or confusing 'successive discounts' with a single added discount.
Candidates pattern-match on keywords ('discount', 'increase') rather than modelling the sequence of operations, and successive percentage changes are not additive. Under time pressure the brain grabs the first familiar formula.
What to do instead
Before calculating, write a one-line chain such as P x 0.85 x 1.15 and only then compute. Memorise the successive-change shortcut a + b + ab/100 and drill 20 mixed successive-percentage questions until the chain-writing becomes automatic.
In General Intelligence and Reasoning, attempting series, coding-decoding and blood-relation questions by intuition instead of writing out the pattern or drawing a family tree.
These questions look short and 'obvious', so candidates answer from working memory. Working memory fails on multi-step letter series and on relations with three or more people, producing confident wrong answers.
What to do instead
Force a written artefact for every reasoning question: alphabet positions (A=1 ... Z=26) written on rough paper for letter series, a diagram for blood relations and seating, and a table for coding-decoding. Do 30 questions per type with the artefact mandatory, then allow shortcuts only after accuracy exceeds 90%.
Treating the non-verbal/visual reasoning items (figure series, mirror images, paper folding, embedded figures) as pure guessing when the figure cannot be mentally rotated quickly.
These items are the least practised in school syllabi, so candidates lack a strategy and default to guessing, or they over-invest time trying to mentally rotate complex figures.
What to do instead
Learn the finite rule set actually used: rotation by 90/180 degrees, number of sides, shading alternation, element addition/removal, and line-count changes. For mirror and water images, apply the left-right or top-bottom reversal rule to one distinctive feature only, not the whole figure. Practise 15 minutes daily on one figure type at a time.
In General Awareness, relying on vague familiarity ('I have heard of this scheme/dynasty/Article') and marking an option that feels familiar rather than the one that is factually correct.
General Awareness distractors are designed to be plausible and topically adjacent (neighbouring Articles, similar-sounding schemes, rulers of the same dynasty). Recognition memory is easily fooled by familiarity.
What to do instead
Convert recognition into recall: after each mock, write the correct fact plus one adjacent fact in a one-line note (e.g. 'Article 356 - President's Rule; Article 360 - Financial Emergency'). Review only these notes, and never mark an option you cannot justify in one sentence.
Neglecting DSSSB-specific static areas (Indian Constitution articles and schedules, Delhi-specific administration and history, basic science, books and authors, sports and awards of the last 12-18 months) because they seem low-yield.
Candidates prepare from generic SSC-style material and skip the Delhi/current-affairs overlap that this exam actually draws on, then meet unfamiliar questions in the paper.
What to do instead
Build a one-page fact sheet each for: constitutional articles and schedules, Delhi's administrative structure and landmarks, and the last 12 months of awards/sports/appointments. Revise these sheets weekly rather than reading long static-GK books cover to cover.
In Hindi Language and Comprehension, answering grammar questions (sandhi, samas, muhavare, paryayvachi) from spoken-language instinct without identifying the grammatical category the question is testing.
School Hindi grammar terminology (e.g. tatpurush vs. bahuvrihi samas, the types of sandhi) is often forgotten, and everyday fluency feels like enough. It is not: the exam tests formal classification.
What to do instead
Relearn the classification tables with two examples each, and for every practice question name the category being tested before choosing. Maintain a personal list of 100 frequently asked muhavare and their meanings, revised on a spaced schedule.
In the Hindi comprehension passage, reading the passage once and then answering from memory, or choosing an option that is true in general but not stated in the passage.
The passage is short, so candidates assume one reading suffices; options are written to be plausible real-world statements, and 'true but not in the passage' is a standard trap.
What to do instead
Read the questions first, then the passage, and underline the sentence supporting each answer. Reject any option you cannot trace to a specific line of the passage, even if it sounds correct.
In English Language and Comprehension, choosing the option that 'sounds right' for grammar, error-spotting and fill-in-the-blank items instead of identifying the tested rule (subject-verb agreement, article use, preposition collocation, tense sequence).
Indian English usage in speech differs from formal written grammar, and distractors are built on exactly those spoken patterns (e.g. 'discuss about', 'one of my friend').
What to do instead
For each practice question, write the rule name next to the answer. Keep an error log of the 10 rules you break most often (prepositions after common verbs, countable/uncountable quantifiers, comparatives) and review it before every mock.
Taking full-length mocks without reproducing exam conditions, then reviewing only the score and not the errors, so the same mistakes repeat across attempts.
Candidates treat mocks as tests of knowledge rather than diagnostics, and practising in a comfortable setting hides the time-management and accuracy problems that appear under a strict clock.
What to do instead
Sit mocks in one uninterrupted block with a timer and no notes, then spend at least as long on analysis: classify every wrong answer as knowledge gap, misread question, or calculation slip, and log it by domain. Re-attempt only the logged questions after a week and track whether the same category recurs.