SSC CGL Computer – Cyber Security & Abbreviations – Level 2 · Exam Level · Section III pace
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Zero days to prepare a fix – hence the name.
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SSC CGL Computer – Cyber Security & Abbreviations – Level 2 · Exam Level · Section III pace – 15 questions, subject: Computer Knowledge. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.
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1.
Match the followingMatch the malware with its main feature:
P. Virus Q. Worm R. Trojan horse S. Ransomware
1. spreads by itself over a network 2. disguised as useful software 3. encrypts files for money 4. needs a host file
P. Virus Q. Worm R. Trojan horse S. Ransomware
1. spreads by itself over a network 2. disguised as useful software 3. encrypts files for money 4. needs a host file
Correct Answer: D [P-4, Q-1, R-2, S-3]
Explanation:
Host, Walk, Mask – and ransom locks.
2.
Statement-basedWhich of the following is/are correct?
I. A Trojan horse copies itself into other files.
II. A worm can spread without any user action.
I. A Trojan horse copies itself into other files.
II. A worm can spread without any user action.
Correct Answer: C [Only II]
Explanation:
A Trojan does not copy itself; a worm walks on its own → only II.
3.
Assertion–Reason
A: Antivirus software must be updated regularly.
R: It finds known malware by matching signatures, and new malware appears all the time.
A: Antivirus software must be updated regularly.
R: It finds known malware by matching signatures, and new malware appears all the time.
Correct Answer: B [Both A and R are true and R explains A]
Explanation:
Without new signatures it cannot recognise new malware – R explains A.
4.
With a Caesar shift of 3, the word SAFE is written as:
Correct Answer: A [VDIH]
Explanation:
Answer: VDIH. S→V, A→D, F→I, E→H.
5.
How many different 3-letter codes can be made from the letters A–Z if letters may repeat?
Correct Answer: A [17,576]
Explanation:
26 × 26 × 26 = 17,576. (15,600 forbids repeats; 78 adds instead of multiplying.)
6.
Odd one out
Correct Answer: C [Worm]
Explanation:
Phishing, vishing and smishing trick people (social engineering); a worm is malware.
7.
A user types the correct address of her bank's website but is taken to a fake copy of the site. This attack is:
Correct Answer: B [Pharming]
Explanation:
Correct address typed, still redirected (e.g.
8.
Two-quantity comparison
Quantity I: number of codes made of 2 letters (A–Z) followed by 1 digit (0–9), repeats allowed
Quantity II: number of possible 4-digit PINs
Quantity I: number of codes made of 2 letters (A–Z) followed by 1 digit (0–9), repeats allowed
Quantity II: number of possible 4-digit PINs
Correct Answer: B [Quantity I < Quantity II]
Explanation:
QI = 26 × 26 × 10 = 6,760; QII = 10,000 → QI < QII.
9.
Asha has digitally signed a document. With which key does the receiver verify her signature?
Correct Answer: D [Asha's public key]
Explanation:
Sign with your private key; anyone checks with your public key.
10.
Spot My Mistake“A stored password hash can be decrypted with the right key.” What is actually true of a hash?
Correct Answer: B [It is one-way – it cannot be turned back into the original data]
Explanation:
A hash is a one-way fingerprint of the data; the same input always gives the same hash, and there is no key to reverse it.
11.
SSL stands for:
Correct Answer: C [Secure Sockets Layer]
Explanation:
SSL – Secure Sockets Layer; its successor is TLS (Transport Layer Security).
12.
A 2-character password could use only small letters (a–z). Digits (0–9) are now also allowed. How many MORE passwords become possible?
Correct Answer: D [620]
Explanation:
36² − 26² = 1,296 − 676 = 620.
13.
An attack that tries every possible combination until the right password is found is called:
Correct Answer: A [Brute-force attack]
Explanation:
Every possible value = brute force; common words first = dictionary attack.
14.
To be on pace for about 2,000 key depressions in 15 minutes, roughly how many key depressions must be made each minute?
Correct Answer: A [133]
Explanation:
Answer: 133. 2,000 ÷ 15 ≈ 133.
15.
A 'zero-day' attack is one that:
Correct Answer: B [uses a flaw the software maker does not yet know, so no patch exists]
Explanation:
Zero days to prepare a fix – hence the name.
➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Computer Knowledge book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-computer-knowledge
📘 SSC CGL 2026 – Computer Knowledge (Tier II Paper I – Section III)
Here you get the answer with a one-line explanation. 672 original questions with answer key and explanations · notes, figures, shortcut keys and memory aids · practice sets + 3 Computer Knowledge mock tests
Get the book – ₹149 More quizzes
› SSC CGL Computer – Mock Test M3 – Computer Knowledge Module
› SSC CGL Computer – Mock Test M2 – Computer Knowledge Module
› SSC CGL Computer – Mock Test M1 – Computer Knowledge Module
› SSC CGL Computer – Cyber Security & Abbreviations – Exam-Level Drill
› SSC CGL Computer – Cyber Security & Abbreviations – Level 3 · Challenge
› SSC CGL Computer – Cyber Security & Abbreviations – Level 1 · Warm-up
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