CENTURIA ACADEMY 100,M.K.N Road, Alandur, Chennai Mob: ,

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1 CENTURIA ACADEMY 100,M.K.N Road, Alandur, Chennai Mob: , Note: For Questions: Correct Answer: 1 Mark, Wrong Answer: Mark, For Not Answered: 0 Mark 1.In 8085, Which of the folowing is/are 16 bit registers. A. Stack Pointer B. Program Counter C. Instruction Register D. Both A and B 2.Stack operation in ? A. LIFO B. FIFO C. LILO D. FILO 3.The width of address bus and data bus in 8085 are respectively. A. 16,8 B. 16,16 C. 8,16 D. 8,8 4.Identify the non makeable interrupt in the following A. RST 7.5 B. RST 6.5 C. RST 5.5 D. TRAP 5.The status of S0 and S1 pins for memory read is A. 0,1 B. 1,0 C. 1,1 D. 0,0 6.PSW stands for contents of A. Accumulator B. flag register C. both of above D. None of the above 7.What is SIM? A. Select interrupt mask B. Sorting interrupt mask C. Set interrupt mask D. Softer interrupt mask 8.RIM is used to check whether ? A. the write operation is done or not. B. interrupt is masked or not. C. the read operation is done or not. D. Both a & b 9.The first part of an instruction which specifies the task to be performed by the computer is called A. Opcode B. Operand C. Instruction cycle D. fetch cycle 10.Which of the following is a two-byte instruction? A. MVI B, 05 B. LDA 2500H C. IN 01 D. Both A & C 11.Which of the following is a two-byte instruction? A. MVI B, 05 B. LDA 2500H C. IN 01 D. Both A & C 12.Let contents of accumulator and B are and respectively. After execution of SUB B instruction, accumulator contents are. A B Page 1

2 C D If the contents of SP are 1000H, the content of B and C registers are moved to memory location stack after PUSH B instruction are... A. 0FFFH, OFFEH B. 0FFEH,0FFFH C. 1000H,0FFFH D. 1000H, 1001H 14.Which of the following instruction will never affect the zero flag? A. DCR R B. ORA R C. DCX Rp D. XRA R 15.The loop will be executed after the following instructions XRA A LXI B, 0007H LOOP: DCX B JNZ LOOP A. 1 B. 8 C. 7 D. Infinite times 16.The instruction that does not clear the contents of accumulator of 8085 is.. A. ANI 00H B. XRA A C. MVI A,00H D. None of the above 17.The contents of accumulator after the execution of following instructions will be MVI A, B7H ORA A RAL A. 6EH B. 4FH C. EEH D. EFH 18.The contents of accumulator before CMA instruction is A5H. Its content after instruction execution is A. A5H B. 5AH C. 00H D. AAH 19.Consider the following set of 8085 instructions. MVI A,82H ORA A JP DSPLY XRA A DSPLY: OUT PORT1 HLT The output at PORT1 is A. 00H B. FFH C. 92H D. 82H 20.Which of the following is two byte and immediate addressing mode A. LXI H,2050H B. LDA 2050H C. IN 20H D. MOV A,B 21.Decimal 43 in Hexadecimal and BCD number system respectively A. B2, B. 2B, C. 2B, D. B2, Page 2

3 22.X = and Y = are two 5 bit binary numbers represented in 2 s compliement format. The sum of X and Y represented in 2 s compliment format using 6 bits is A B C D The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either A. a NAND or an EX-OR gate B. a NOT or an EX-NOR gate C. an OR r an EX-NOR gate D. an AND or an EX-OR gate 24.3rd highest civilian award in india A. bharat ratna B. padmavibushan C. padmabhusan D. padmashri 25.ukai dam is acrosswhich river A. narmada B. tapti C. mahi D. sabarmati2 26. minimum age to become as president of india A. 34 B. 36 C. 35 D MD of BSNL A. Anupam kher B. aruma srivastava C. shrima srivastava D. anupam srivastava 28. national film awards held in 2016 A. 63rd B. 61st C. 62nd D. 64th 29.rajiv gandhi Khel ratna award 2016 is given to persons A. 1 B. 2 C. 3 D sharon owen is associated with A. dance B. music C. drama D. painting 31. Headquarters of ITU ( INTERNATIONAL TELECOMUNICATION UNION) A. Newyork B. Washington C. Bern D. Geneva 32. TDSAT is formed in year A B C D Among this which is west flowing river A. godavari B. ganga C. indus D. mahanadi degree north in earth globe represents region A. temperate B. subtropical Page 3

4 C. tropical D. polar 35. kangchengdoza national park is located in which state A. arunachel pradesh B. sikkim C. west bengal D. assam 36. HEDONIST refers A. pleasure seeker B. wizardperson C. medical expert D. none 37.The meaning of word EXTRAVAGANT A. generous B. stingy C. cruel D. spacious 38. Rangasami cup is associated with which sports A. hockey B. cricket C. football D. volley ball 39. 2nd foreigner to receive bharat ratna award A. mother teresa B. nelson mandela C. Khan abdulgaffar khan D. pele 40. genocide means A. killing one gender B. killing one race C. killing one community D. killing one society 41. He is USA citizen A. a B. an C. the D. none 42. Thomas cup is world championship for men's A. volleyball B. football C. badminton D. polo 43. ACE WITH ODDS is autobiography of A. saina nehwal B. sania mirza C. saini mehta D. P.V.Sindhu 44.Bistable Multivibrator is A. FlipFlop B. Nand Gate C. Register D. Counter 45.No of flipflops required for mod-13 counter is A. 4 B. 13 C. 16 D The output frequency of decade counter which is clocked from a 50KHz signal is A. 50KHz B. 5MHz C. 5KHz D. 500Hz 47.A parity bit check is used to detect A. 1 bit error B. 2 bit error C. 10 bit error D. none of the above 48.Excess 3 code for 59 is Page 4

5 A B C D In order to user nor gate as inverter A. all its inputs are tied together B. all its inputs are kept open C. each input is used as an inverter input D. None of these 50.A binary with n digits all of which are unity has the value A. (n^2)-1 B. (2^n)-1 C. 2n-1 D. 2^n 51.A secondary memory is A. Always volatile B. Always costlier than primary memory C. Always slower than primary memory D. None of these 52.What is the value of the number 1001 which is in signed 2s complement form A. +5 B. -5 C. +7 D BCD expresses each decimal digit as A. string of 2 bits B. string of 8 bits C. string of 6 bits D. string of 4 bits 54.A NAND circuit with positive logic will operate as A. NOR gate with negative logic B. AND gate with negative logic C. OR gate with negative logic inputs D. AND gate with negative logic outputs 55.Given the decimal number -19, an eight bit 2s complement representation is given by A B C D. None of these 56.In the expression A(A+B) by writing the first term A as A+0, the expression can best simplified as A. A+AB B. AB C. A D. A+B 57.Conversion of in digital form is A B C D In sequential circuits, the output states are function of A. Present input states B. Past inputs states C. Present and past input states D. None of these 59.In sign magnitude numbers, A. The leading bit stands for sign B. The leading bit is part of magnitude C. The leading bit is always 0 D. The leading bit is always 1 60.The Number 149 in octel code is A. 154 B. 178 C. 254 D In a connection, two and only two devices are connected by a dedicated link. Page 5

6 A. Multipoint B. Point-to-point C. Both A&B D. None of these 62.A television broadcast is an example of transmission. A. Simplex B. Half Duplex C. Full Duplex D. None of these 63.A is a data communication system within a building, plant, or campus, or between nearby buildings. A. WAN B. MAN C. LAN D. PAN 64. is a collection of many separate networks. A. A WAN B. an Internet C. A LAN D. None of these 65.Which topology requires a central controller or hub? A. STAR B. BUS C. RING D. MESH 66.A multicast message is sent from to A. One source, One Destination B. One Source, Multiple destination C. Multiple Destination, One source D. Multiple Destination, Multiple Source 67.Which of the following does UDP guarantee? A. Flow control B. Connection oriented delivery C. Either A or B D. None of these 68.The combination of an IP address and a port number is called a A. Transport address B. network address C. socket address D. None of the above 69.A port address in UDP is bits long. A. 8 B. 16 C. 32 D The value of the window size is determined by A. the sender B. the receiver C. both the sender and receiver D. none of these 71.What is the output of these program? int a=5; printf("%d",a++); printf("%d",++a); A. 5,7 B. 6,7 C. 7,7 D. 5,5 72.Which of the following is costliest memory element A. Registers B. RAM C. HarDisc D. Tape media 73.Database architecture is Tier architectue A. 3 B. 2 C. 1 D. 4 Page 6

7 74.Which of the following is an input device? A. Key board B. Mouse C. Touchscreen D. All of these 75.What is the size of the DVD? A. 700 MB B. 4.7 GB C KB D. 4.7 MB 76.Which of the following is an Volatile memory A. RAM B. ROM C. EPROM D. EEPROM 77.Which of the following an aggregate function? A. COUNT B. SUBSTR C. ABS D. All of these 78.Which of the following is not a routing protocol? A. OSPF B. BGP C. TCP D. EIGRP 79.The computer architecture aimed at reducing the time of execution of instructions is A. CISC B. RISC C. ISA D. ANNA 80.Which of the architecture is power efficient? A. CISC B. RISC C. ISA D. ANNA 81.Which of the following is an odd function? A. f(x) = x B. f(x) = xsinx C. f(x) = x^2 D. All of these 82.Laplace transform F(s) for f(x) = 2t^2 is A. 4/(s^3) B. 2/(s^2) C. 4/(s^3) D. 4/(s^2) 83.What is the slope of the line perpendicular to the line 3x+2y = 7 A. -3/2 B. 2/3 C. -2/3 D. 3/2 84.What is the angle between two vectors a and b? Assume all vectors are having arrow) A. sin(theta) = axb /( a b ) B. cos(theta) = (a.b)/( a b ) C. Both A & B D. None of these 85.What is the equation of the x axis? A. X=0 B. Y=0 C. either A or B D. Both A & B 86.If all the elements of the matrix are same value and non zero then matrix is called as A. Null Matrix B. Scalar Matrix C. Diagonal Matrix D. Triangular Matrix Page 7

8 87.If order of matrix A is 4x3 then what is the rank of the matrix B if A can be multiplied with B. A. 3x4 B. 4x4 C. 4x3 D. 3x3 88.what is the determinant value of the following matrix A. -20 B. -40 C. 40 D dot product of two vectors i+2j+3k and 2i-j+4k is A. 16 B. 12 C. 8 D Find the equation of the line having x and y intercepts are 2, -5 respectively A. 2y-5x+20=0 B. 5x+2y+10=0 C. 2y-5x+10=0 D. 2x-5y+10=0 91.if f(x) is e^(5t)sin(2t) then Laplace transform F(s) is A. 2/((s-5)^2-4) B. (s-5)/((s-5)^2 + 4) C. 5/((s-5)^2 + 4) D. 2/((s-5)^2 + 4) 92.What is the rank of a null matrix A. 0 B. 1 C. 2 D if f(x) = 4/(x^2) then d(f(x))/dx =? A. -8/x^3 B. -4/x^3 C. -2/x^3 D. 8/x^3 94.if Z1 = 2+i and Z2=1+3i then Re(Z1-Z2)=? A. 3 B. 1 C. 2i D. -2i 95.Polar form of a complex number is A. r ( tanθ + ιcotθ ) B. r(secθ + ιcosecθ ) C. r(cosθ + ιsinθ ) D. r (sinθ + ιcosθ) 96. z1 + z2 = A. > Z1 + Z2 B. Z1 + Z2 C. Z1 + Z2 D. > Z1 + Z2 97.Find the value of the fourier coefficient a0 for y = sinx A. 0 B. 2 C. -1 D what is the value of i^99 is A. -i B. i C. -1 D. 1 Page 8

9 99.Co factor for the element a32 of the matrix A= A. 6 B. -6 C. 3 D A is a matrix and if A =0 then which of the following statement is true? A. Matrix A is singular Matrix B. No Inverse for Matrix A C. Both A & B D. None of these D A A D A C C B A D D C A C A D A B A C B C B C A C D A D A A B B A B A A A B B A C B A A C A B A B C D D C B C B C A D B A C B A B D C B B A A A D B A A C B B A A B C B B A C B C D A A B C B A A B C Page 9

System Data Bus (8-bit) Data Buffer. Internal Data Bus (8-bit) 8-bit register (R) 3-bit address 16-bit register pair (P) 2-bit address

Intel 8080 CPU block diagram 8 System Data Bus (8-bit) Data Buffer Registry Array B 8 C Internal Data Bus (8-bit) F D E H L ALU SP A PC Address Buffer 16 System Address Bus (16-bit) Internal register addressing: