Multiple Choice Questions & Answers on LAN topologies 1. Data communication system within a building or campus is________ a) LAN b) WAN c) MAN d) PAN Answer: LAN 2. Physical or logical arrangement of network is __________ a) Topology b) Routing c) Networking d) Control Answer: Topology 3. In a star-topology Ethernet LAN, _______ is just a point where the signals coming from different stations collide; it is the collision point. a) An active hub b) A passive hub c) either (a) or (b) d) neither (a) nor (b) Answer:  A passive hub 4. _____ LAN topology describes the possible connections between pairs of networked end-points that can communicate. a) Complex b) Physical c) Logical d) Incremental Answer: Logical 5. LAN topology describes the possible connections between pairs of networked end-points that can communicate. a) Complex b) Physical c) decrement d) Logical Answer: Logical 6. Bus, ring and star topologies mostly used in the a) LAN b) MAN c) WAN d) Internetwork Answer: LAN 7. A t

Multiple Choice Questions & Answers on OSI Seven Layer model Physical Layer Multiple Choice Questions & Answers 1. The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned Answer: all of the mentioned 2. The physical layer is responsible for _________ a) line coding b) channel coding c) modulation d) all of the mentioned Answer: all of the mentioned 3. A single channel is shared by multiple signals by ____________ a) analog modulation b) digital modulation c) multiplexing d) phase modulation Answer: multiplexing 4. The physical layer is concerned with ___________ a) bit-by-bit delivery b) process to process delivery c) application to application delivery d) port to port delivery Answer: bit-by-bit delivery 5. In asynchronous serial communication the physical layer provides ___________ a) start and stop si

Multiple Choice Questions & Answers on Huffman Code 1. What is the value of redundancy in Huffman Code when the probabilities are negative powers of two? a) 1 b) 2 c) 3 d) O Answer: 0 2. How many printable characters does the ASCII character set consists of? a) 120 b) 128 c) 100 d) 98 Answer: 100 3. A Huffman code: A = 1, B = 000, C = 001, D = 01, P(A) = 0.4, P(B) = 0.1, P(C) = 0.2, P(D) = 0.3 The average number of bits per letter is a) 8.0 bit b) 1.9 bit c) 2.0 bit d) 2.1 bit Answer: 1.9 bit 4. An alphabet consist of the letters al, a2, a3, a4 and a5. The probability of occurrence is P(al)=P(a3)=0.2, P(a2)= 0.4, P(C) = 0.2 and P(a4) = P(a5)= 0.1.The Huffman code is a) al = 1, a2-01, a3= 000, a4 = 0010, a5-0011 b) al 01, a2=1, a3= 000, a4 = 0010, a5-0011  c) al 0011, a2=1, a3= 000, a4 = 0010, a5-01 d) al 01, a2=1, a3= 000, a4 = 0011, a5-0010 Answer: al 01, a2=1, a3= 000, a4 = 0010, a5-0011 5. Length of Huffman Code is: a) H(S)<= 1 < (H(S) +1 b) H(S)>= 1 < (H(S) +1 c) H(

Multiple Choice Questions & Answers on Data Compression 1. The development of data compression algorithms for a variety of data can be divided into   a) 2 b) 3 c) 4 d) 5  Answer: 2 2. Based on the requirements of reconstruction, data compression schemes can be divided into broad classes a) 3 b) 4 c) 2 d) 5  Answer: 2 3. How many printable characters does the ASCII character set consists of? a) 128 b) 100 c) 98 d) 90 Answer: 100 4. The unary code for 4 is a) 11100 b) 11110 c) 00001 d) 00011 Answer: 11110 5. An alphabet consist of the letters A, B, C and D. The probability of occurrence is P(A) = 0.4, P(B)= 0.1, P(C) = 0.2 and P(D) = 0.3. The Huffman code is a) A = 0 B = 111 C = 110 D = 10 b) A = 0 B = 11 C = 10 D = 111 c) A = 0 B = 111 C = 11 D = 101 d) A = 01 B = 111 C = 110 D = 10 Answer: A = 0 B = 111 C = 110 D = 10 6. A Huffman code: A = 1, B = 000, C = 001, D = 01 , P(A) = 0.4, P(B) = 0.1, P(C) = 0.2, P(D) = 0.3 The average number of bits per letter is a) 0 bit b) 1 bit c) 0 bi

Multiple Choice Questions & Answers on Parallel Computing 1. During the execution of the instructions, a copy of the instructions is placed in the ______ . a) register b) ram c) system heap d) cache Answer: cache 2. Pipe-lining is a unique feature of _______. a) risc b) cisc c) isa d) iana Answer: risc 3. If a processor clock is rated as 1250 million cycles per second, then its clock period is ________ . a) 1.9 * 10 ^ -10 sec b) 1.6 * 10 ^ -9 sec c) 1.25 * 10 ^ -10 sec d) 8 * 10 ^ -10 sec Answer: 8 * 10 ^ -10 sec 4. A processor performing fetch or decoding of different instruction during the execution of another instruction is called ______ . a) super-scaling b) pipe-lining c) parallel computation d) none of these Answer: pipe-lining 5. Both the CISC and RISC architectures have been developed to reduce the______. a) cost b) time delay c) semantic gap d) all of the above Answer: semantic ga 6. A collection of lines that connects several devices is called __________ a) bus b) periphe

Multiple Choice Questions & Answers on Real Time & embedded System OS RTOS MCQ 1. Time duration required for scheduling dispatcher to stop one process and start another is known as ____________ a) process latency b) dispatch latency c) execution latency d) interrupt latency Answer: dispatch latency 2. In rate monotonic scheduling ____________ a) shorter duration job has higher priority b) longer duration job has higher priority c) priority does not depend on the duration of the job d) none of the mentioned Answer: shorter duration job has higher priority 3. The problem of priority inversion can be solved by ____________ a) priority inheritance protocol b) priority inversion protocol c) both priority inheritance and inversion protocol d) none of the mentioned Answer: priority inheritance protocol 4. In real time operating system ____________ a) all processes have the same priority b) a task must be serviced by its deadline period c) process scheduling can be done only once d) ke