What is data encryption standard (DES)?
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Correct answer: (A) Block cipher
Explanation
DES is a symmetric block cipher that encrypts data in 64-bit blocks with a 56-bit key.
DSSSB TGT / PGT · Computer Science
Cyber Security Previous Year Questions
13 Cyber Security (Computer Science) questions asked in DSSSB TGT / PGT previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.
- 13 questions
- Official answer key
- Free
Other Computer Science topics
DBMS & SQL 229Digital Logic & Number Systems 194Computer Networks 177Operating Systems 161Data Structures 151Programming in C/C++ 89Web Technologies 68Algorithms 66Computer Organization & Architecture 66Discrete Mathematics 66OOP 63Java 46E-Commerce & IT Management 41Computer Fundamentals & MS Office 34Python 29Computer Graphics & Multimedia 28Software Engineering 23AI, ML & Data Science 11
______ monitors user's activity on Internet and transmits that information in the backgroud to someone else.
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Correct answer: (B) Spyware
Explanation
Spyware secretly monitors a user's activity, such as browsing and keystrokes, and sends that information to a third party in the background. Adware mainly shows unwanted advertisements.
What is the full form of SSL in web development?
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Correct answer: (A) Secure Sockets Layer
Explanation
SSL stands for Secure Sockets Layer, the protocol (now replaced by TLS) that encrypts traffic between a browser and a server.
Which of the following is not a Cipher mode in Cryptography?
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Correct answer: (C) Stem Cipher Mode
Explanation
Block cipher modes include ECB, CBC, CFB, OFB and CTR. "Stream (Stem) cipher mode" is not one of them.
What critical information does a digital certificate contain?
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Correct answer: (A) Public key, owner information and certificate validity
Explanation
A digital certificate, signed by a Certificate Authority, binds the owner's identity to a public key and states the validity period. The private key is never put in a certificate.
What is the primary purpose of multimedia authoring software?
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Correct answer: (D) To create interactive multimedia presentations
Explanation
Authoring software (such as Adobe Animate or Director) is used to combine text, images, audio and video into interactive multimedia presentations. Media players only play the files.
Which of the following refers to a system test that forces a software to fail in a variety of ways and verifies that recovery is properly performed?
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Correct answer: (A) Recovery testing
Explanation
Recovery testing deliberately makes the software fail in different ways and checks that recovery is performed correctly.
In cyber security, what remedy does the law provide?
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Correct answer: (B) Imprisonment
Explanation
Cyber laws such as the IT Act, 2000 provide legal remedies against cyber crime, including punishment by imprisonment and fines.
Which of the following refers to a character-for-character or bit-for-bit transformation without regard to the linguistic structure of the message?
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Correct answer: (B) Cipher
Explanation
A cipher transforms the message character by character or bit by bit without regard to its meaning. A code, by contrast, replaces whole words or phrases.
The ______ namespace defines classes and interfaces used in constructing and rendering elements on a web form.
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Correct answer: (A) System.Web.UI
Explanation
System.Web.UI holds the classes and interfaces (Page, Control and so on) used to build and render ASP.NET web form elements.
What are the three security goals?
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Correct answer: (B) Confidentiality, integrity and availability
Explanation
The CIA triad of Confidentiality, Integrity and Availability makes up the three basic goals of information security.
What is the most common method of intrusion detection?
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Correct answer: (C) Signature-based detection
Explanation
Signature-based detection matches traffic against a database of known attack patterns. It is the most widely used method of intrusion detection.
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Correct answer: (D) plain text
Explanation
Encryption converts readable plain text into unreadable cipher text using a key. Plain text is the information that gets transformed; cipher text is the result.
How to use these DSSSB TGT / PGT Computer Science questions
Every question here was asked in a real DSSSB TGT / PGT paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full DSSSB TGT / PGT papers as timed tests to check your speed under exam conditions.