Punjab Technical University, Jalandhar MCA 1st semester question papers

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Question1 is compulsory. Any three from the rest.

Question 1.
(a) Design a 4-bit shift register, which is capable of shifting its binary information in both the directions
aloqs with the facility of parallel loading.
(b) Differentiate between a hardwired control unit and a micro programmed control unit.
(c) What is the difference between a memory mapped I/O and a peripheral mapped l/O ?
(d) Draw the circuit diagram of RS flip flop and explain its working.
(e) Differentiate between MISD and SISD classification of computers suggested by Flynn.

Question 2.
(1)Explain the direct and associative cache mapping.
(2)Write a program in 8086 assembly language to find the user specified number in a list of 15 numbers
which is stored in a specific location.
(3)Write down the method of converting a binary number into its Gray Code equivalent. Also, give an
Example

Question 3.
(a) Using NAND gate generate the AND and NOR functions.
(b) What is meant by "addressing mode" ? Explain why the different addressing modes are required.
Explain any two addressing modes that need no address field at all. Giving suitable example for each.
(c) Explain the principles of vector processing. Also, explain various types of vector instructions and
their execution.

Question 4.
(a) Explain the DMA controller with block diagram. What is meant by a block transfer ?
(b) What are the various phases of an instruction cycle ? Give the micro operation of :fetch and decode
phases
(c) Compare Static RAM with Dynamic RAM.

Question 5.
(a) Simplify the following expression using Karnaugh's map in product of sum form :
F (W,X , Y, Z',)=I (0, 1, 2, 3, 4, 6, 7, g, g,11, 15) Also, draw the logic circuit for the simplified
expression.
(b) Subtract 1010100 - 1000011 using 2's complernent.
(c) Convert 2222in hexadecimanl umber.
(d) Write an 8086 assembly language program to convert a 4-digit octal number to its decimal
equivalent
(e) List the registers that are used by the ALU to ,perform various tasks. Also, explain how these
registers are used.
(f) What is a cache memory ? Explain about multiple levels of cache.
(g) Differentiate between RISC and CISC architecture

Contact Details:
Punjab Technical University
Near Pushpa Gujral Science City,
Jalandhar- Kapurthala Hwy,
Rasulpur,
Punjab 144601 ‎
0182 266 2521
India

Map Location:

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Hello friend as you want the Punjab Technical University, Jalandhar MCA 1st semester question papers so here I am providing you the same….

What do you mean by the terms algorithm and flowchart? Illustrate their use with the help of suitable examples?

Q2) List and explain different types of data types in C?Also differentiate between signed and unsigned data types with reference to range of memory they occupy?
(1 x 10: 10)

Section - B
Q3) What are functions? Differentiate between call by value and call by reference with the help of suitable examples?

a4), Write a C program to read the element of two 3 x 3 matrices and multiply two main test

Section - C
(1x10-10)
Q5) Write a function (using pointer parameters) that compares two integer arrays to see whether they are identical. The function returns I if they are identical, 0 otherwise?

Q6) Differentiate and compare the working of an array, structure and a union with the help of suitable examples?

Section – D

Q7) Write a program that compares two files and returns 0 if they are equal and I if they are not.

Q8) What do you mean by dynamic memory allocation? Explain the working of following functions with the help of suitable examples :
. Malloc ( )
. Calloc ( )
. Free o
. Realloc ( )

Section - E
Differentiate between reserve words and identifiers?
What are enumerated data types?
What is sorting?
What is the role of header files?
Explain global variable and local variable.
What do you mean by conditional statements.
What do you mean by prototype?
List the various string operations?
What is the role of return statement?
What do you mean by recursion?




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