Which type of malware replicates itself without any user action? A. Virus B. Worm C. Trojan D. Spyware Correct answer is: B. Worm 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In fiber optics, the phenomenon where the strength of light decreases as it travels through the fibre is called? A. Refraction B. Attenuation C. Dispersion D. Reflection Correct answer is: B. Attenuation 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In graph in which every node is connected to other node is called? A. Directed graph B. Weighted graph C. Complete graph D. Sparse graph Correct answer is: C. Complete graph 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In networking Bandwidth refers to? A. The maximum data transfer rate of a network connection B. The frequency of the signal C. The distance data travels D. The physical width of the cable Correct answer is: A. The maximum data transfer rate of a network connection 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
A. The maximum data transfer rate of a network connection B. The frequency of the signal C. The distance data travels D. The physical width of the cable
In networking MTU refers to? A. Maximum Transfer Unit B. Minimum Transmission Unit C. Maximum Throughput Unit D. The Maximum size of the single data packet that can be transmitted Correct answer is: D. The Maximum size of the single data packet that can be transmitted 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
A. Maximum Transfer Unit B. Minimum Transmission Unit C. Maximum Throughput Unit D. The Maximum size of the single data packet that can be transmitted
Which OSI layer is responsible for end-to-end communication and error handling? A. Network Layer B. Transport Layer C. Session Layer D. Data Link Layer Correct answer is: B. Transport Layer 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In which network topology is a single central point failure (e.g., via a DoS—Denial of Service attack on the hub) most likely to disrupt the entire network? A. Star Topology B. Mesh Topology C. Bus Topology D. Ring Topology Correct answer is: A. Star Topology 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
The type of cryptography in which one key is public and the other is private is called? A. Asymmetric Key cryptography B. Hash cryptography C. Symmetric Key cryptography D. Quantum cryptography Correct answer is: A. Asymmetric Key cryptography 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
A. Asymmetric Key cryptography B. Hash cryptography C. Symmetric Key cryptography D. Quantum cryptography
Which of the following is not a layer in OSI Model? A. Physical Layer B. Process Layer C. Transport Layer D. Network Layer Correct answer is: B. Process Layer 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
Which protocol or service is used terminal connection service? to remote log into another computer? A. FTP B. UDP C. RARP D. Telnet Correct answer is: D. Telnet 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
Which of the following is not a routing protocol? A. ICMP B. RIP C. BGP D. OSPF Correct answer is: A. ICMP 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
What defines the rule for communication between Computers? A. Hardware B. Operating System C. Protocol Network D. Software Correct answer is: C. Protocol Network 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
The HTTP protocol works on which port by default? A. 21 B. 80 C. 25 D. 443 Correct answer is: B. 80 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
Which of the following is NOT a valid Microsoft Excel file format? A. .xlsx B. .csv C. .xls D. .pdf Correct answer is: D. .pdf 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
Which computer architecture has one instruction stream and one data stream? A. SISD B. MIMD C. MISD D. SIMD Correct answer is: A. SISD 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
An expression is a collection of? A. Constants only B. Variables only C. Operators only D. Constants, variables and operators Correct answer is: D. Constants, variables and operators 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
MAC is a? A. Operating System B. Utility Program C. multimedia D. windows Correct answer is: A. Operating System 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In MS Word, Artistic Effects can be applied to pictures using which tool? A. WordArt B. SmartArt C. Picture Tools D. Drawing Tools Correct answer is: C. Picture Tools 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In MS Word, a table of contents can be inserted from? A. Home Tab B. References Tab C. Layout Tab D. Design Tab Correct answer is: B. References Tab 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
A computer primarily uses which number system? A. Decimal B. Binary C. Hexadecimal D. Octal Correct answer is: B. Binary 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
Which of the following is not a valid data type in C/C++? A. Long Long B. long double C. Using float D. Wchar-t Correct answer is: C. Using float 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
In a relational database, a table is also called? A. Tuple B. Relation C. Attribute D. Domain Correct answer is: B. Relation 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
An External database is referred to? A. create in word B. Created DMBS Package C. Database created in EXCEL D. Database on external server Correct answer is: D. Database on external server 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
A. create in word B. Created DMBS Package C. Database created in EXCEL D. Database on external server
In operating systems, checkpoints are used for? A. Security purposes B. Recovery process C. Performance enhancement D. Memory management Correct answer is: B. Recovery process 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
Deadlock in an operating system occurs when? A. A process terminates unexpectedly B. A process waits indefinitely for resources held by other processes C. CPU is overloaded D. Memory is insufficient Correct answer is: B. A process waits indefinitely for resources held by other processes 📖 Read Detailed Explanation → Computer Science MCQS Past Paper Computer Operator in Revenue Department Leave a Comment | Umar
A. A process terminates unexpectedly B. A process waits indefinitely for resources held by other processes C. CPU is overloaded D. Memory is insufficient