Computer set 2 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 525 questions
Q.181 Which protocol is used to synchronize clocks on network devices?
A NTP
B SNMP
C SMTP
D DHCP
Discuss / Board
Q.182 Which DNS record type is used for reverse DNS lookup (IP to domain)?
A PTR record
B A record
C CNAME record
D NS record
Discuss / Board
Q.183 What does the 'DHCP lease' specify?
A The duration for which an IP address is assigned to a client
B The physical location of the DHCP server
C The encryption key for Wi-Fi
D The maximum upload speed
Discuss / Board
Q.184 In the OSI model, which layer ensures end-to-end error recovery and flow control?
A Transport layer
B Session layer
C Network layer
D Data link layer
Discuss / Board
Q.185 What is a 'socket' in networking?
A A combination of an IP address and a port number
B A physical network connector
C A wireless access point
D A type of firewall
Discuss / Board
Q.186 Which HTTP status code indicates a successful request?
A 200 OK
B 301 Moved Permanently
C 404 Not Found
D 500 Internal Server Error
Discuss / Board
Q.187 What is the main function of FTP?
A Transfer files between computers over a network
B Send email messages
C Browse web pages
D Resolve domain names
Discuss / Board
Q.188 Which protocol is used to securely transfer files, combining FTP with SSH?
A SFTP
B FTPS
C TFTP
D HTTP
Discuss / Board
Q.189 What is a primary characteristic of UDP compared to TCP?
A Connectionless and does not guarantee delivery
B Guarantees ordered delivery
C Provides error correction
D Slower than TCP
Discuss / Board
Q.190 In network topology, what is a 'mesh topology'?
A Each device is connected to every other device directly
B All devices connect to a central hub
C Devices are connected in a closed loop
D Devices share a single communication line
Discuss / Board
Q.191 Which Wi-Fi standard operates at 5 GHz and offers higher throughput?
A 802.11ac
B 802.11b
C 802.11g
D 802.11n (2.4 GHz only)
Discuss / Board
Q.192 What does 'SNMP' stand for and what is its purpose?
A Simple Network Management Protocol; manages and monitors network devices
B Secure Network Mail Protocol; encrypts emails
C System Network Monitoring Process; monitors CPU usage
D Standard Network Measurement Protocol; tests speed
Discuss / Board
Q.193 Which protocol is used for VoIP communication?
A SIP (Session Initiation Protocol)
B SMTP
C FTP
D HTTP
Discuss / Board
Q.194 What is the function of the 'netstat' command?
A Displays active network connections, listening ports, and statistics
B Assigns IP address
C Sends ICMP echo requests
D Resolves DNS names
Discuss / Board
Q.195 Which of the following is an example of a cloud service model that provides virtual machines?
A IaaS
B PaaS
C SaaS
D FaaS
Discuss / Board
Q.196 What is 'serverless computing'?
A A cloud execution model where the cloud provider runs the server and dynamically manages resources
B Computing without any servers
C Using only physical on-premise servers
D Disabling server operating systems
Discuss / Board
Q.197 Which encryption algorithm is an example of symmetric-key cryptography?
A AES
B RSA
C ECC
D Diffie-Hellman
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Q.198 In public-key cryptography, which key is shared publicly?
A Public key
B Private key
C Symmetric key
D Session key
Discuss / Board
Q.199 What is the purpose of a digital certificate?
A Bind a public key to an entity's identity, verified by a Certificate Authority
B Store passwords securely
C Encrypt hard drives
D Block malware
Discuss / Board
Q.200 Which protocol provides end-to-end encryption for email?
A PGP (Pretty Good Privacy)
B SMTP
C POP3
D IMAP
Discuss / Board
Q.201 What is a 'hash function' used for in security?
A Produce a fixed-size digest that uniquely represents data; verify integrity
B Encrypt data for confidentiality
C Compress files
D Generate random numbers
Discuss / Board
Q.202 What is 'salting' in password security?
A Adding random data to a password before hashing to prevent rainbow table attacks
B Encrypting the password with a symmetric key
C Storing passwords in plain text
D Using biometric authentication
Discuss / Board
Q.203 In a ransomware attack, what is typically used to extort victims?
A Encrypting files and demanding payment for the decryption key
B Stealing and selling user data
C Sending threatening emails
D Flooding the network with traffic
Discuss / Board
Q.204 What is a 'SQL injection' attack?
A Inserting malicious SQL code into a query to manipulate the database
B Flooding a SQL server with traffic
C Encrypting SQL database files
D Stealing server hardware
Discuss / Board
Q.205 Which security principle ensures that actions can be traced to an individual uniquely?
A Non-repudiation
B Confidentiality
C Integrity
D Availability
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Q.206 What is a 'zero trust' security model?
A Never trust, always verify; no user or device is trusted by default
B Trust all internal network traffic
C Disable all firewalls
D Rely solely on antivirus
Discuss / Board
Q.207 Which type of attack involves an attacker intercepting and altering communication between two parties?
A Man-in-the-middle (MitM)
B Phishing
C DDoS
D Brute force
Discuss / Board
Q.208 In Excel, which function returns the number of working days between two dates, excluding weekends and holidays?
A NETWORKDAYS
B WORKDAY
C DAYS360
D DATEDIF
Discuss / Board
Q.209 What does the Excel function =SUMPRODUCT(A1:A3, B1:B3) calculate?
A Sum of the products of corresponding elements: A1*B1 + A2*B2 + A3*B3
B The sum of all values in both ranges
C The product of the sums
D A matrix multiplication
Discuss / Board
Q.210 Which Excel function can replace VLOOKUP by looking both left and right?
A XLOOKUP
B HLOOKUP
C INDEX/MATCH
D LOOKUP
Discuss / Board

Master Computer set 2 for All Competitive Exams 2026

Practicing Computer set 2 MCQs is one of the most effective ways to prepare for competitive examinations in 2026. This topic-wise question bank contains carefully selected multiple-choice questions designed to strengthen conceptual understanding, improve accuracy, and enhance problem-solving speed. Our collection includes beginner, intermediate, and advanced-level questions frequently asked in JKSSB, SSC, Banking, Railway, Police, Defence, State PSC, and various national-level examinations. Every question is structured to reflect real exam patterns and helps candidates become familiar with objective-type assessment formats. Instant answer verification enables students to identify mistakes immediately and learn the correct approach without wasting valuable preparation time. Regular practice of topic-wise MCQs improves retention, reinforces key concepts, and develops confidence required to perform well under exam pressure. Whether you are revising important concepts, preparing for an upcoming recruitment test, or strengthening weak areas, these practice questions provide a reliable platform for continuous improvement. Consistent participation in MCQ-based learning sessions can significantly increase your chances of achieving higher scores and better ranks in competitive examinations.

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