B.Sc. (Computer Science) (Part 1) EXAMINATION, 2009 COMPUTER PROGRAMMING FUNDAMENTAL
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1 1 COMPUTER PROGRAMMING FUNDAMENTAL Attempt any five questions. All questions carry equal marks. 1. Differentiate algorithm and program. How a program is developed? Discribe the importance of algorithm for a good program (a) What do you mean by batch file in DOS? How it is created? Explain. 2+3 (b) Define following commands with examples: i. Format ii. Xcopy iii. Deltree iv. Move v. Mkdir 1X5 3. Write the difference between corn shell, bourn shell of Unix (a) Explain various data types that are used in Pascal Programming. 5 (b) Write a Pascal program to find factorial of a given number (a) What is array? Write a program to add two matrices. 2+4 (b) Write a Pascal program to print Fibonacci series (a) What is procedure? Write the difference in the declaration of function and procedure. 1+4 (b) What is function? How it is declared and use? Describe (a) What is queue? Explain the insert and delete function (b) Explain preemptive and composite data type Why the searching is made? In how many ways it can be done? Explain with algorithm for each type of searching. 1 1 / / What is Linked List? What are the types of liked list? Explain in detail with the algorithm for each type
2 2 COMPUTER MAINTENANCE-I Attemp any five questions. All questions carry equal marks. 1. (a) What is the architecture of a computer system? Discuss the structure of motherboard. 5 (b) What is PCB and its components? Write a note on cables used in a computer setup (a) Discuss in detail kirchoffs current and voltage laws. What are its applications? 5 (b) What are the application areas of Resistors? What are inductors? 5 3. (a) Discuss the define Thevenin s Mention its applications. 5 (b) What is Norton s theorem? Discuss its usage (a) What are filters? Mention their types and examples. 5 (b) What are serial and parallel LCR Resonance Circuits? Write a notes on Time constant (a) What are active elements and their working principles? What is zoner diode? 5 (b) What are application areas for PN junction diodes? Mention their types (a) Define an amplifier. What are its related terminologies? 5 (b) What are opto-isolators? Write a short notes on MOSFET and Triac (a) What are OPAMP and its black box concept? What are OPAMP parameters? 5 (b) What is Decibel Input Output? Write a notes on Computer Registers Write short notes on: a. Comparator b. Linear Integrator c. Load line
3 3 COMPUTER MAINTENANCE-II Attemp any five questions. All questions carry equal marks. 1. (a) Explain different generations of computers. 5 (b) Explain different type of computers (a) What is memory? Differentiate between RAM and ROM. 2+3 (b) Explain different types of RAM What is operating system? Differentiate between UNIX and DOS operating system Explain the following DOS commands with suitable example: i. COPY ii. CD iii. RD iv. XCOPY v. FORMAT 2X5 5. Explain the following UNIX commands with suitable example: i. Banner ii. Kill iii. Cls iv. Cal v. MKDIR 2X5 6. Write short notes: i. Real Time system ii. Secondary storage devices Differentiate between: i. TCP/IP and OSI Model ii. Batch Processing and Time Sharing System What are external DOS commands? Differentiate between Deltree and Delete commands Explain different applications of computers in our life Explain: i. Batch file ii. Tracks and Sectors
4 4 DIGITAL COMPUTER ORGANIZATION Attempt any five questions. All questions carry equal marks 1. Convert the following numbers from the given base to bases indicated: (i) Decimal to binary, octal and hexadecimal (ii) Hexadecimal 2ACS.D to decimal, binary and octal. (iii) Octal to binary, decimal and hexadecimal (iv) Binary to decimal, octal, hexadecimal (v) Hexadecimal EF.C to binary. 2. Perform the following arithmetic operations. Using the designation based without converting to decimal. Verify your result by converting the numbers to decimal and then performing the operation in decimal: (i) ( ) 2 ( ) 2 (ii) (1101) 2 * (1011) 2 (iii) (52E9) 16 - (133F) 16 (iv) ( ) 2 + ( ) 2 (v) (54) 8 * (20) 8 3. (a) Find the 10 s complement of (935) 11 (b) Show how the decimal integer +120 and -120 would be represented in signed magnitude, 1 s complement and 2 s complement notations using 8 bites and 10 bits respectively. 4. Convert the following to: (i) NAND- only implementation (ii) NOR only implementation 5. Write short notes on: -4-
5 5 (i) Logic gates (ii) Multiplexer (iii) Flip flop (iv) Shift Register (v) Decoder 6. Explain Different types of memories in computer system. 7. Explain in detail the internal structure of CPU. 8. Explain system Bus, Address Bus, Data Bus and control Bus in detail, 9. What are registers? Why registers are necessary in a computer system? Explain different types of Register and their utility. 10. Detail out the IO Architecture. -5-
6 6 ELECTRONICS-I Attempt any five questions. All questions carry equal marks. 1. What are registers? Discuss properties and use of various types of registers Write notes on: i. AF and RI choke coils ii. Resonance in series combination of L and C. 3. What are transformers? Discuss the principal and working of step-up and step-down transformers What are capacitors? Discuss construction and working of all types of capacitors, in details Explain the construction and working of all types of loudspeakers and compare them (i) Explain the construction and working of different types of switches. (ii) Discuss idea current and voltage sources What do you understand by resonance? Discuss resonsnce in series LCR circuit Define bandwidth and quality factor. Discuss resonance in paralled LC circuit Compare the following: (i) Thevenin s and Norton s theorem (ii) Series and parallel resonance (i) State and prove maximum power transfer theorem (ii) State and prove reciprocity thermo
7 7 ELECTRONICS-I Attempt any five questions. All questions carry equal marks. 1. (a) Explain the working of a P-N junction. Discuss forward and reverse biasing of P- N junction. What is meant by avalanche breakdown? 5 (b) In an n-type semiconductor the Fermi level lies 0.4eV below the conduction band. If the concentration of donor atoms is doubled, find the new position of Fermi level (Assume KT=0.03 ev) 5 2. (a) Explain the concept of energy bands in solids. Explain depletion region and diffusion current in a semi conductor and obtain an expression for diffusion current density. 6 (b)the reverse bias saturation current for p-n junction is 40µA. find the current when forward bias of 0.1 Volt is applied on it (a) For p-n junction define transaction capacitance. Prove that: C r = εa/d (b) Derive p-n junction diode equation Explain the following, giving application and operation: i. Schottky Barrier ii. Tunnel Diode iii. Varactor Diode iv. Zener Diode (a) What is photovoltaic effect? Describe the working of a solar cell and draw its equivalent circuit and find out the condition for maximum output power. 6 (b) Indicate which of the following p-n diodes are forward biased and which are reverse biased: i. -7-
8 8 ii. iii. iv. 6. (a) Discuss how a transistor can be used as: i. An amplifier ii. A switch 4 (b) What are the three configuration of transistor amplifier? Compare with regard to their impedence, output impedence, current and voltage gain Discuss the construction of a typical transistor and explain: i. Why emitter is heavily doped? ii. Why base width is small and it is highly doped? iii. Why collector area is large? iv. Discuss the working of a p-n-p transistor (a) What do you mean by amplification? Draw a circuit diagram of RC-coupled transistor amplifier and calculate its voltage gain in low, mid and high frequency range
9 9 (b) Calculate the values of base current in common base amplifier in which potential difference of 2.2 volts is produced on 2.2 kω resistance connected with collector. (α=0.9) 6 9. (a) What is SCR? Give theory and modes of operation of SCR. Explain phase control in SCR. 6 (b) Compare the operation of SCR and TRIAC. 2 (c) What is the difference between DIAL and thyrister? 2-9-
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