UKPSC Senior Scientific Assistant 2025: Senior Scientific Assistant, Forensic Science Laboratory (Group-B) Examination, Computer Forensic
Text of page 2
1. SSL Protocol does not have _______.
(a) Fragmentation compression (b) Integrity
(c) Asymmetric key cryptography (d) None of the above
2. ‘TLS Handshake’ involves _______.
SSF_Set-A
(a) Establishing encryption keys (b) Verifying user credentials
(c) Sending e-mails (d) Encrypting files
3. Which is not a function of Intrusion Detection and Prevention System (IDPS) ?
(a) Detection of Intrusions (b) Monitoring Network Traffic
(c) Firewall Functions (d) None of the above
4. What does ARP poisoning aim to achieve in a network attack ?
(a) Altering routing paths.
(b) Intercepting DNS queries.
SSF_Set-A
(c) Associating the attacker’s MAC address with a legitimate IP address.
(d) Encrypting ARP packets.
5. Which encryption protocol is considered the most secure among WEP, WPA and WPA-2 ?
(a) WPA-2 (b) WPA (c) WEP (d) TKIP
6. IPsec is designed to provide the security at which layer of the following ?
(a) Transport layer (b) Session layer (c) Application layer (d) Network layer
7. In tunnel mode IPsec protects the ______.
SSF_Set-A
(a) IP Header (b) IP Payload (c) Entire IP Packet (d) None of these
8. Which of the following is not a common technique used in SQL injection attacks ?
(a) Union-based injection (b) Blind SQL injection
(c) Client-side validation (d) None of the above
9. Extensible authentication protocol is commonly used as an authentication framework in
_______.
(a) Wireless network (b) Wired local area network
SSF_Set-A
(c) Wired personal area network (d) None of these
10. Which protocol provides end-to-end encryption for e-mail communication ?
(a) PGP (b) TCP (c) DNS (d) ICMP
11. A hash function must meet at least _______ criteria.
(a) Two (b) Three (c) Four (d) None of these
12. Digital signature needs a(n) _______ system.
I. Symmetric key
SSF_Set-A
II. Asymmetric key
(a) Only I (b) Only II (c) Either I or II (d) Neither I nor II
13. VLAN can _______. SSF_Set-A
I. Reduce network traffic.
II. Provide extra measure of security.
(a) I only (b) II only (c) I or II (d) Both I and II
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1. _____
(a) (b)
(c) (d)
2. ‘ ’ _____
SSF_Set-A
(a) (b)
(c) - (d)
3. ?
(a) (b)
(c) (d)
4. ARP ?
(a)
SSF_Set-A
(b)
(c) MAC
(d)
5. WEP, WPA WPA-2 ?
(a) WPA-2 (b) WPA (c) WEP (d) TKIP
6. IPsec :
(a) (b) (c) (d)
SSF_Set-A
7. IPsec _____
(a) (b) - (c) (d)
8. SQL ?
(a) - (b) SQL
(c) - (d)
9. ____
(a) (b)
SSF_Set-A
(c) (d)
10. - -- ?
(a) PGP (b) TCP (c) DNS (d) ICMP
11. _____
(a) (b) (c) (d)
12. _____
I.
SSF_Set-A
II.
(a) I (b) II (c) I II (d) I II
13. VLAN _____ SSF_Set-A
I.
II.
(a) I (b) II (c) I II (d) I II
SSF 3 Series-A
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14. Which of the following does not provide adequate protection against modern threats under
security encryption ?
(a) AES (b) RC4 (c) ECC (d) None of the above
15. What is the full form of PKI related to SSL ?
(a) Public Key Infrastructure (b) Private Key Infrastructure
SSF_Set-A
(c) Public Key Instructions (d) Private Key Instructions
16. Which of the following are not valid formats of SSL certificates ?
(a) PEM (b) DER (c) PKCS#7 (d) PKCS#25
17. _______is actually an IETF version of _______.
(a) TLS ; TSS (b) SSL ; TLS (c) TLS ; SSL (d) SSL ; SLT
18. Which of the following is not element / field of the X.509 certificates ?
(a) Signature (b) Issuer Name
SSF_Set-A
(c) Serial Modifier (d) Issuer Unique Identifier
19. The OSI model has _______ layers.
(a) 5 (b) 7 (c) 3 (d) 4
20. What is the layer above physical layer in TCP/IP reference model ?
(a) Application layer (b) Transport layer
(c) Internet layer (d) Link layer
21. If the prefix contains 28 addresses and so leaves 24 bits for the network portion, it is written as
(a) 128.208.2.0/8 (b) 128.208.2.0/16 (c) 128.208.2.0/24 (d) 128.208.2.0/32
SSF_Set-A
22. Each block in Class A contains _______ addresses.
(a) 216 (b) 224 (c) 28 (d) 214
23. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet
that uses the 255.255.255.224 subnet mask ?
(a) 14 (b) 15 (c) 16 (d) 30
24. Dialog control is the function of which layer ?
(a) Transport Layer (b) Session Layer (c) Presentation Layer (d) Application Layer
SSF_Set-A
25. What does Iaas provide ?
(a) Infrastructure (b) Software (c) Application (d) Data
26. What does a hybrid cloud combine ?
(a) Public and private clouds (b) On-premise and public networks
(c) Multiple private clouds (d) Only public clouds
27. What is the primary function of Identity and Access Management (IAM) in cloud security ?
(a) Monitor traffic (b) Control user permissions
(c) Manage encryption keys (d) Analyse data
28. SSF_Set-A
Which of the following is a major challenge in cloud forensics ?
(a) Data locality (b) Increased speed of network
SSF_Set-A
(c) Data replication (d) Service availability
29. Which cloud computing concept refers to the ability to scale resources up or down quickly
based on demand ?
(a) Reliability (b) Elasticity (c) Portability (d) Multi-tenancy
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14. ?
(a) ... (b) .. 4 (c) ... (d)
15. SSL PKI ?
(a) (b)
SSF_Set-A
(c) (d)
16. SSL - ?
(a) PEM (b) DER (c) PKCS#7 (d) PKCS#25
17. _____ _____ IETF
(a) TLS ; TSS (b) SSL ; TLS (c) TLS ; SSL (d) SSL ; SLT
18. X.509 - / ?
(a) (b)
SSF_Set-A
(c) (d)
19. OSI _____
(a) 5 (b) 7 (c) 3 (d) 4
20. / ?
(a) (b) (c) (d)
21. 28 24 , :
(a) 128.208.2.0/8 (b) 128.208.2.0/16 (c) 128.208.2.0/24 (d) 128.208.2.0/32
SSF_Set-A
22. A _____
(a) 216 (b) 224 (c) 28 (d) 214
23. 255.255.255.224
?
(a) 14 (b) 15 (c) 16 (d) 30
24. ?
(a) (b) (c) (d)
SSF_Set-A
25. Iaas ?
(a) (b) (c) (d)
26. ?
(a) (b) -
(c) (d)
27. (IAM) ?
(a) (b)
SSF_Set-A
(c) (d)
28. ?
(a) SSF_Set-A
(b) (c) (d)
29.
?
(a) (b) (c) (d) -
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30. What is the primary function of a hypervisor in virtualization ?
(a) To manage virtual machines and allocate resources.
(b) To secure data in transit.
(c) To provide software applications to end-users.
(d) To encrypt data at rest.
SSF_Set-A
31. _____ is used for live packet capturing.
(a) IDS (b) Nmap (c) Wireshark (d) None of the above
32. Which authentication type uses password only ?
(a) Multifactor (b) Token based (c) Single factor (d) None of the above
33. What is the function of Intrusion Detection System ?
(a) Blocking attacks (b) Generate warning
(c) Encrypting traffic (d) None of the above
SSF_Set-A
34. What is not a function of a Firewall ?
(a) Traffic filtering (b) Network-segmentation
(c) Endpoint protection (d) None of the above
35. Which one is not the part of Booting process ?
(a) Power-On Self-Test (POST) (b) Disk defragmentation
(c) Firmware initialization (d) None of the above
36. What is the multiplicative inverse of 8 in Z10 ?
(a) 2 (b) 3 (c) 4 (d) None
SSF_Set-A
37. Additive ciphers are vulnerable to _______ attacks.
(a) Statistical (b) Pattern (c) Ciphertext only (d) None of the above
38. An example of polyalphabetic cipher is _______ cipher.
(a) Shift (b) Caesar (c) Playfair (d) None of the above
39. Book cipher is also called as _______.
(a) Rail fence technique (b) One-time pad
(c) Mono-alphabetic cipher (d) Running key cipher
40. _______ increases the redundancy of plaintext.
SSF_Set-A
(a) Confusion (b) Diffusion
(c) Both confusion and diffusion (d) None of the above
41. _______ are very crucial for the success of asymmetric key cryptography.
(a) Integers (b) Negative numbers (c) Fractions (d) Prime numbers
42. The _______ standard defines the structure of a digital certificate.
(a) X.500 (b) TCP/IP (c) ASN.1 (d) X.509
43. SSL exchanges information between _______ and _______.
(a) Web browser, Web server (b) Web browser, Application server
SSF_Set-A
(c) Web server, Application server (d) Application server, Database server
44. The main purpose of SET is related to _______.
SSF_Set-A
(a) Secure communication between browser and server
(b) Digital signatures
(c) Message digests
(d) Secure credit card payments on the internet
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30. ?
(a)
(b)
(c)
SSF_Set-A
(d)
31. _____
(a) IDS (b) Nmap (c) Wireshark (d)
32. ?
(a) (b) (c) (d)
33. (function) ?
(a) (b) (c) (d)
SSF_Set-A
34. ?
(a) (b) (c) - (d)
35. ?
(a) - - () (b)
(c) (d)
36. Z10 8 ?
(a) 2 (b) 3 (c) 4 (d)
SSF_Set-A
37. _____
(a) (b) (c) (d)
38. _____
(a) (b) (c) (d)
39. _____
(a) (b) -
(c) - (d)
SSF_Set-A
40. _____ (Plaintext) (redundancy)
(a) (b)
(c) (d)
41. _____
(a) (b) (c) (d)
42. _____
(a) X.500 (b) TCP/IP (c) ASN.1 (d) X.509
SSF_Set-A
43. SSL _____ _____
(a) , (b) ,
SSF_Set-A
(c) , (d) ,
44. SET _____
(a) (b)
(c) (d)
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45. In a certificate based authentication the user needs to enter password for accessing _______.
(a) private key file (b) public key file (c) random challenge (d) seed
46. Token based authentication is an example of _______ authentication.
(a) 1-factor (b) 2-factor (c) 3-factor (d) 4-factor
SSF_Set-A
47. Kerberos provides for _______.
(a) Encryption (b) SSO (c) Remote login (d) Local login
48. IPsec provides security at the _______ layer.
(a) Application (b) Transport (c) Network (d) Data link
49. Linear cryptanalysis uses _______.
(a) chosen-plaintext attacks (b) known-plaintext attacks
(c) pattern attacks (d) statistical attacks
SSF_Set-A
50. Blowfish is not suitable for _______.
(a) packet switching (b) communication links or file encryptors
(c) one-way hash function (d) smart cards
51. Which cipher is generally not efficient for real-time processing ?
(a) RSA (b) AES (c) CDC (d) None of the above
52. El Gamal cryptosystem is not based on _______.
SSF_Set-A
(a) Exponential congruence (b) Quadratic congruence
(c) Discrete logarithm (d) None of the above
53. The whirlpool cipher is a non-fiestel cipher that uses _______ rounds.
(a) 10 (b) 12 (c) 14 (d) 16
54. Under which scheme we get a document signed without revealing the contents of the
document to the signer ?
(a) Undivisible Digital Signature Scheme (b) Time-Stamped Digital Signature Scheme
SSF_Set-A
(c) Blind Digital Signature Scheme (d) None of the above
55. In Windows, common hidden directories do not include which of the following ?
(a) C:\Windows (b) %APPDATA% (c) C:\ProgramData (d) None of the above
56. A vehicle navigation system that comes with Windows phone :
(a) Google Map (b) Bing Map (c) Star Map (d) None of these
57. Which of the following does not come under Web-jacking ?
(a) Phishing (b) Domain spoofing (c) Web scaping (d) None of the above
58. SSF_Set-A
Investigators can extract evidence from an Android smartphone using
(a) Joint Test Action Group (JTAG) (b) Chip-off
(c) Both (a) and (b) SSF_Set-A
(d) None of these
59. ATM is also known as _______.
(a) Frame Relay (b) Cell Relay (c) Both (a) and (b) (d) None of these
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45. _____
(a) (b) (c) (d)
46. - _____
SSF_Set-A
(a) 1- (b) 2- (c) 3- (d) 4-
47. _____
(a) (b) (c) (d)
48. IPsec _____
(a) (b) (c) (d) -
49. _____
SSF_Set-A
(a) - (b) -
(c) (d)
50. _____
(a) (b)
(c) - (d)
51. - ?
(a) ... (b) ... (c) ... (d)
SSF_Set-A
52. _____
(a) (b)
(c) (d)
53. - _____
(a) 10 (b) 12 (c) 14 (d) 16
54. ?
(a) (b) -
SSF_Set-A
(c) (d)
55. , ?
(a) C:\Windows (b) %APPDATA% (c) C:\ProgramData (d)
56.
(a) (b) (c) (d)
57. - ?
(a) (b) (c) (d)
58. SSF_Set-A
?
(a) (JTAG) (b) -
(c) (a) (b) SSF_Set-A
(d)
59. ATM _____
(a) (b) (c) (a) (b) (d)
SSF 9 Series-A
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60. Who sets the standard of GSM ?
(a) IEEE 802 (b) UMTS (c) HSCSD (d) ETSI
61. CDR in mobile forensic stands for
(a) Call Detail Record (b) Caller Detail Record
(c) Call Duration Record (d) Caller Duration Record
SSF_Set-A
62. How many digits are there in the string of IMSI number ?
(a) 10 (b) 12 (c) 15 (d) 16
63. Which of the following is not the part of IMSI number of SIM ?
(a) Mobile Country Code (b) Mobile Check Digit
(c) Mobile Network Code (d) Mobile Subscriber Identification Number
64. ATM uses packets of fixed length called _______.
(a) Frame (b) Cell (c) Slot (d) None of these
SSF_Set-A
65. ATM packet size has been optimized to ensure :
(a) High data rate (b) Minimize delay (c) Both (a) and (b) (d) None of these
66. A Bluetooth network is called
(a) Piconet (b) Pinnet (c) Pinconet (d) Pinet
67. What is Social Media ?
(a) A type of e-mail service
(b) A platform for online purchasing
(c) A means of communication and interaction
SSF_Set-A
(d) A video game
68. If a signal changes instantaneously, its frequency is
(a) Zero (b) Infinite (c) Both of the above (d) None of the above
69. For 5 channels, each with a 100 kHz bandwidth, are to be multiplexed. What is the minimum
bandwidth of the link if there is a need for a guard band of 10 kHz between the channels to
prevent interference ?
(a) 640 kHz (b) 550 kHz (c) 340 kHz (d) 540 khz
SSF_Set-A
70. In _______ one channel carries all transmissions simultaneously.
(a) FDMA (b) TDMA (c) CDMA (d) None of the above
71. _______ in Windows can be used to trace the path of a packet from a source to the
destination.
(a) Traceroute (b) Tracert (c) Ping (d) None of the above
72. Assume that, in a stop-and-wait system, the bandwidth of the line is 1 Mbps, and 1 bit takes
20 milliseconds to make a round trip. What is the bandwidth-delay product ?
(a) 60000 bits (b) 40000 bits (c) 20000 bits (d) 10000 bits
SSF_Set-A
73. For which of the following purpose(s), cookie mechanism was devised ?
(a) Some websites need to allow access to registered clients only.
(b) Some websites are used as portals; the user selects the web pages he wants to see.
SSF_Set-A
(c) Some websites are just advertising agencies.
(d) All of the above
74. A reactive fault management system is responsible for _______ of faults.
(a) Detection (b) Isolation (c) Correction (d) All of the above
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Text of page 11
60. GSM ?
(a) IEEE 802 (b) UMTS (c) HSCSD (d) ETSI
61. CDR
(a) (b) (c) (d)
SSF_Set-A
62. IMSI ?
(a) 10 (b) 12 (c) 15 (d) 16
63. SIM IMSI ?
(a) (b)
(c) (d)
64. ATM _____
(a) (b) (c) (d)
SSF_Set-A
65. ATM :
(a) (b) (c) (a) (b) (d)
66. _____
(a) Piconet (b) Pinnet (c) Pinconet (d) Pinet
67. ?
(a) - (b)
(c) (d)
SSF_Set-A
68. , _____
(a) (b) (c) (d)
69. 100 kHz
10 kHz , ?
(a) 640 kHz (b) 550 kHz (c) 340 kHz (d) 540 kHz
70. _____
(a) FDMA (b) TDMA (c) CDMA (d)
SSF_Set-A
71. Windows _____
(a) Traceroute (b) Tracert (c) Ping (d)
72. -- 1 Mbps , 1 bit
20 - ?
(a) 60000 bits (b) 40000 bits (c) 20000 bits (d) 10000 bits
73. / ?
(a)
SSF_Set-A
(b) ; ,
SSF_Set-A
(c)
(d)
74. _____
(a) (b) (c) (d)
SSF 11 Series-A
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75. Which of the following is not a type of bus used in the computer system ?
(a) Data bus (b) Address bus (c) Information bus (d) Control bus
76. Which one of the following is not a part of Process Control Block (PCB) ?
(a) Program counter (b) Paging information
(c) Process ID (d) Register information
SSF_Set-A
77. Which of the following is not an advantage of Solid-state Storage Devices (SSDs) drive ?
(a) Low power and heat (b) High reliability
(c) Small form factor (d) Low storage density
78. What is the medium used in optical storage system for reading and recording data ?
(a) High energy visible light (b) Black light
(c) Ultraviolet light (d) Laser light
79. Type/s of spoofing is/are
SSF_Set-A
(a) Spam (b) Phishing (c) Both (a) and (b) (d) None of these
80. _____ occurs when a person sends a message with angry or antagonistic control.
(a) E-mail spoofing(b) E-mail bombing (c) E-mail hacking (d) Flaming
81. Which type of attack involves falsifying the sender’s address to appear as a trusted source ?
(a) Spoofing (b) Eavesdropping (c) Modification (d) Cross-site scripting
82. In DNS spoofing what is attacker attempting to achieve ?
(a) Redirecting domain requests to malicious sites.
(b) Eavesdropping on DNS queries.
SSF_Set-A
(c) Altering DNS server configurations.
(d) Encrypting DNS traffic.
83. The _____ provides guidelines to members for managing a forensics lab and acquiring crime
and forensics lab certification.
(a) ASCII (b) EBCDIC (c) ASCLD (d) None of these
84. The _____ hardware acquisition tools, that can access drive at the BIOS level.
(a) Pre-discovery with the NoWrite FPU Write-blocker
(b) Image master
SSF_Set-A
(c) X-ways Replica
(d) All of the above
85. On a Windows system sectors typically contain how many bytes ?
(a) 256 (b) 512 (c) 1024 (d) 2048
86. A real density refers to which of the following ?
(a) Number of bits per disk
(b) Number of bits per partition
(c) Number of bits per square inch of a disk platter
(d) Number of bits per platter
87. SSF_Set-A
NTFS’s EFS can encrypt which of the following ?
(a) Files, Folders and Volumes (b) Certificates and Private Keys
(c) The Global Registry SSF_Set-A
(d) Network Servers
88. Which of the following is not a correct file access method ?
(a) Sequential Access (b) Relative Access
(c) Logical Access (d) Direct Access
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Text of page 13
75. ?
(a) (b) (c) (d)
76. (PCB) ?
(a) (b) (c) ID () (d)
SSF_Set-A
77. - (SSDs) ?
(a) (b) (c) (d)
78. ?
(a) (b)
(c) (d)
79. / /
(a) (b) (c) (a) (b) (d)
SSF_Set-A
80. _____
(a) - (b) - (c) - (d)
81. ?
(a) (b) (c) (d) -
82. DNS ?
(a)
(b) DNS
SSF_Set-A
(c) DNS
(d) DNS
83. _____
(a) ASCII (b) EBCDIC (c) ASCLD (d)
84. _____ /, BIOS
(a)
SSF_Set-A
(b)
(c) -
(d)
85. : ?
(a) 256 (b) 512 (c) 1024 (d) 2048
86. ?
(a) (b)
SSF_Set-A
(c) (d)
87. NTFS EFS ?
(a) , SSF_Set-A
(b)
(c) (d)
88. ?
(a) (b) (c) (d)
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89. Match List-I with List-II and choose the correct answer using the codes given below :
List – I List – II
(File type) (Usual Extension)
A. Object 1. dll
B. Mark up 2. tar
SSF_Set-A
C. Library 3. obj
D. Archive 4. xml
Codes :
A B C D
(a) 2 3 4 1
(b) 3 4 2 1
(c) 3 2 1 4
(d) 3 4 1 2
90. Which file in Linux contains information about user accounts ?
(a) /etc/shadow (b) /etc/group (c) /var/log/auth.log (d) /etc/passwd
SSF_Set-A
91. Which log file in Mac OS contains information about system startups and shutdown ?
(a) system.log (b) kernel.log (c) fsck.log (d) auth.log
92. Which protocol is commonly used for secure communication between web services ?
(a) HTTP (b) FTP (c) HTTPS (d) SMTP
93. Cookie is used by website as _______.
(a) transient (b) permanent (c) non-volatile (d) None of the above
94. Session beans are _______.
(a) Client process object (b) Server process object
SSF_Set-A
(c) Business process object (d) None of the above
95. What is a major challenge in cloud forensics related to evidence collection ?
(a) Physical access to servers
(b) Data loss due to encryption
(c) Data distribution across multiple locations
(d) Incompatibility of forensics tools
96. Which protocol is exploited during Address Resolution Protocol poisoning attack ?
(a) TCP (b) DNS (c) ICMP (d) ARP
SSF_Set-A
97. SSL encrypts data between _________.
(a) Server and Client (b) Server and Server
(c) Client and Database (d) Client and Client
98. A _______ is a private network that operates within and nearby a single building.
(a) WAN (b) MAN (c) LAN (d) None of the above
99. In Computer Networking, data can be lost in _______.
(a) Lossless compression (b) Morse code
(c) Lossy compression (d) Encryption
100. In SSL Protocol the second sub-protocol, the following steps are taken :
I. Data compression is enabled. SSF_Set-A
II. Message from browser is broken into units of upto 16 bits.
SSF_Set-A
III. The compressed fragment and MAC is encrypted.
IV. A secret key is derived from two nonces.
The correct order of steps is :
(a) I, II, III, IV (b) II, I, IV, III (c) III, I, II, IV (d) IV, III, II, I
____________
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Text of page 15
89. -I -II :
– I – II
( ) ( )
A. 1. dll
SSF_Set-A
B. 2. tar
C. 3. obj
D. 4. xml
:
A B C D
(a) 2 3 4 1
(b) 3 4 2 1
(c) 3 2 1 4
(d) 3 4 1 2
SSF_Set-A
90. ?
(a) /etc/shadow (b) /etc/group (c) /var/log/auth.log (d) /etc/passwd
91. Mac OS ?
(a) system.log (b) kernel.log (c) fsck.log (d) auth.log
92. ?
(a) HTTP (b) FTP (c) HTTPS (d) SMTP
93. _____
(a) () (b) (c) (d)
SSF_Set-A
94. _____
(a) (b)
(c) (d)
95. ?
(a) (b)
(c) (d)
96. ?
(a) (b) (c) (d)
SSF_Set-A
97. ?
(a) (b) (c) (d)
98. _____
(a) WAN (b) MAN (c) LAN (d)
99. , _____
(a) (b) (c) (d)
100. - :
I. SSF_Set-A
II. 16
SSF_Set-A
III. MAC
IV.
(a) I, II, III, IV (b) II, I, IV, III (c) III, I, II, IV (d) IV, III, II, I
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Series-A 16 SSF
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Source: Uttarakhand Public Service Commission. Question paper published by Uttarakhand Public Service Commission.