All 27 Computers & IT questions the Punjab PSC asked between 2015 and 2026, each with a worked answer and the exam it came from. First 10 free to read.
Free to read, with the worked answer and the exam each one came from. The book prints this topic in the order the Commission favours, so these are the ones to know first.
Which of the above statements are correct ?
A backdoor is a hidden way of bypassing normal security checks to gain high-level access to a system, network or application. It may be left by a developer, planted by malware or installed by an attacker. Spoofing is pretending to be another user or device, sniffing is capturing data packets in transit, and war dialing is dialling many telephone numbers to find modems.
A deepfake is synthetic media — an image, audio clip or video. In it a person's face, voice or actions are fabricated or swapped using deep-learning techniques such as generative adversarial networks. The result is realistic footage of events that never happened. A botnet is a network of hijacked computers. Ransomware is malware that encrypts data for extortion. A Trojan horse is malware disguised as legitimate software. None of these generates altered media.
An analog signal is turned into a digital bit stream by pulse-code modulation (PCM): the signal is sampled, each sample is quantised, and the values are coded as binary pulses. Note the trap: inside a modem the modulator converts the computer's digital signal for the analog telephone line and the demodulator reverses it. Decoding is the interpretation of already coded data.
Ransomware is malware that locks a computer or encrypts its files and demands payment to restore access; WannaCry (2017) is a well-known example. A keylogger secretly records keystrokes, and a Trojan is malware disguised as useful software.
Quantum computing uses quantum effects such as superposition and entanglement to solve certain problems, so statement 1 is correct. David Deutsch described the universal quantum computer in 1985 and is regarded as the father of quantum computing, so statement 4 is correct. Statement 2 is wrong: quantum computers can be exponentially faster than classical ones for specific tasks. Statement 3 is wrong: the basic unit is the qubit, not a 'quantum byte'.
Cyber Swachhta Kendra is the Botnet Cleaning and Malware Analysis Centre launched in 2017 under Digital India. It is operated by CERT-In (Indian Computer Emergency Response Team) under the Ministry of Electronics and Information Technology, so II and III are correct. It has nothing to do with the Ministry of Information and Broadcasting, and it is run by CERT-In, not C-DAC.
Bhoomi is the Government of Karnataka's land-records computerisation project, begun in 2000, not Kerala's, so pair (b) is the wrong match. BhuNaksha is NIC's digital cadastral mapping software, Dharani is Telangana's integrated land-records portal, and SVAMITVA (2020) is the Ministry of Panchayati Raj's scheme that issues property cards for inhabited village land using drone surveys.
The first neural network machine was SNARC — Stochastic Neural Analog Reinforcement Calculator. Marvin Minsky built it with Dean Edmonds at Harvard in 1951. It used about 40 vacuum-tube 'neurons' to simulate a rat learning a maze. Einstein and Bose worked in physics, on Bose–Einstein statistics. Cooper is a distractor.
MeghRaj is the GI Cloud initiative of the Government of India, launched in 2014 by the Ministry of Electronics and Information Technology (then DeitY). It is a set of cloud computing environments spread over different locations and following common standards, meant to make government e-services faster and cheaper, so I and IV are correct. It has nothing to do with rainfall data or with the Ministry of Information and Broadcasting.
Tricking a person into revealing card details or a PIN through a fraudulent email that poses as a legitimate request is phishing. Skimming copies card data with a hidden device at an ATM or point-of-sale terminal, spamming is bulk unsolicited mail, and 'virus signing' is not an attack type.
You have read the ten the Commission asks most. The rest of this topic — and all 4,239 questions across the book, each with a worked solution — come with either edition.
The whole book online, on any device. Read it or attempt it question by question. Nothing to download, nothing to wait for.
Access does not expire, and includes every test released later in whichever series you buy.
You sign in with your phone number as part of checkout — that is what your copy is tied to.
536 pages, delivered. Five full papers and five OMR sheets at the back. Online access is included free, from the moment you pay.
See the printed book →The Commission set 27 Computers & IT questions across 30 papers between 2015–2026. That is the whole set, not a sample — every one of them is in the book, and the 10 most-asked are on this page free.
Not in this set — each of these 27 was set once in the years covered. Questions elsewhere in the book do repeat, and carry a badge saying how often.
Here. Every question on this page is a solved MCQ: the four options as printed, the correct answer, and a worked explanation in plain English — not just a letter. The rest of the 27 are in the book, in the same form.
Switch to Attempt mode at the top of the questions. You get one question at a time and it is marked the moment you pick an option, with the reason underneath — the same way the exam feels, on your phone.
The questions are on screen rather than in a downloadable file, so they stay current and correct. The printed book has all 27 of these plus the rest of the General Knowledge section, and every buyer gets the whole thing online as well.
The exams behind these questions, most first. A paper here is a sitting: a question set in two papers of the same sitting counts once.
| Exam | Year | Questions |
|---|---|---|
| District Programme Officer | 2017 | 4 |
| District Sainik Welfare Officer | 2016 | 4 |
| Naib Tehsildar | 2023 | 3 |
| Scientific Officer (Cyber Forensics) (Group B) | 2023 | 2 |
| Scientific Assistant (Cyber Forensics) (Group B) | 2023 | 2 |
| Inspector, Cooperative Societies | 2022 | 2 |
| Enquiry Officer | 2018 | 2 |
| Drugs Control Officer | 2018 | 2 |
| Senior Scientific Officer (Food Safety) Microbiology | 2018 | 2 |
| Assistant Director, Industrial Training Principal Junior Scale Industrial Traini | 2018 | 2 |
| Senior Scientific Officer (Drugs) | 2018 | 2 |
| Child Development Project Officer (Group-B) | 2026 | 1 |