MCA112 Computer Organisation & Architecture MCA Question Bank : bbdnitm.ac.in

Name of the Institute : Babu Banarasi Das National Institute of Technology & Management
Degree : MCA
Department : Computer Applications
Subject Code/Name : (MCA-112) Computer Organisation & Architecture
Year : 1st
Semester : 1st
Document Type : Question Bank
Website : bbdnitm.ac.in

Download Model/Sample Question Paper :https://www.pdfquestion.in/uploads/bb…estionBank.pdf

BBDNITM Computer Organisation Question Paper

Unit-1

1. An 8-bit binary word b7b6b5b4b3b2b1b0 as an integer x ranges from
A) –128 to 128 B) –128 to 127 C) –256 to 256 D) None of the above

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2. In a J-K flip-flop the function K = J is used to realize
A) T-Flip-flop B) S-R Flip-flop C) D-Flip-flop D) M/S J-K flip-flop

3. A register capable of shifting its binary information in one or both direction is known as
A) Shift Register B) Address Register C) Index Register D) Accumulator

4. . A micro programmemd control unit has a storage area called
A) memory B) control memory C) instruction memory D) noen

5. What logic circuit would you use for addressing memory?
A) Full adder B) Multiplexer C) Decoder D) Direct Memory Access circuit

6. How many select lines do an 8 input multiplexer have?
A) 1 B) 3 C) 8 D) 64

7. How is a J-K flip-flop made to toggle?
A) J=0, K=0
B) J=1, K=0 C) J=0, K=1 D) J=1, K=1

8. 8085 Microprocessor Uses ——–V Power supply
A) 5 B) 10 C) 8 D) 6

9. On a master-slave flip-flop, when is the master enabled?
When the gate is Low When the gate is HIGH Both of the above Neither of the above

10. How many flip-flops are required to make a MOD-32 binary counter?
A) 3 B) 45 C) 5 D) 6

12. The bit sequence 0010 is serially entered (right-most bit first) into a 4-bit parallel out shift register that is initially clear. What are the Q outputs after two clock pulses?
A) 0000 B) 0010 C) 1000 D) 1111

13. What is a shift register that will accept a parallel input, or a bidirectional serial load and internal shift features, called?
A) Tristate B) End around C) Universal D) Conversion

14. A bidirectional 4-bit shift register is storing the nibble 1101. Its input is HIGH. The nibble 1011 is waiting to be entered on the serial data-input line. After three clock pulses, the shift register is storing ________.
A) 1101 B) 0111 C) 0001 D) 1110

15. Determine the values of A, B, C, and D that make the sum term equal to zero.
A = 1, B = 0, C = 0, D = 0 A = 1, B = 0, C = 1, D = 0 A = 0, B = 1, C = 0, D = 0 A = 1, B = 0, C = 1, D = 1

16. Which of the following expressions is in the sum-of-products (SOP) form?
A) (A + B)(C + D) B) (A)B(CD) C) AB(CD) D) AB + CD

17.Derive the Boolean expression for the logic circuit shown below : A) C(A+B)DE? B) [C(A+B)D+E?] C) [[C(A+B])D]E? D) ABCDE

18. When used with an IC, what does the term “QUAD” indicate?
A) 2 Circuits B) 4 Circuits C) 6 Circuits D) 8 Circuits

19. A flip flop circuit can be used for
A) Counting B) Scaling C) Rectification D) Demodulation

20. If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
A) 1 B) 2 C) 7 D) 8

Unit-2

1. Which 0 is inserted to the end bit position
A) logical shift B) arithmetic shift C) cyclic shift

2. Microprograms ar designed to ____________ the behaviour of the instruction set.
A) emulte B) input C) register D) hardwired

3. The communication line between the CPU, memory and peripherals is called a
A)Bus B) line C)media D) none of these

4. Status register is also called as ___________
A) Accumulator B) Stack C) Counter D) flags

5 Which of the following addressing mode is used in zero-address instructions.
A)direct B)implied C)indirect D)none

6. Where does a computer add and compare data?
A) Hard disk B) Floppy disk C) CPU chip D) Memory chip

7.. A micro programmemd control unit has a storage area called
A) memory B) control memory C) instruction memory D) noen

8. A complete microcomputer system consists of
A) microprocessor B) memory C) peripheral equipment D) all of above

9. Number of addressing modes used in CISC architectures are
A) 1 to 5 B) 5 to 10 C) 5 to 20 D) above 20

10. Pipelining strategy is called implement
A) instruction execution B) instruction prefetch C) instruction decoding D) instruction manipulation

11. A stack is
A) an 8-bit register in the microprocessor B) a 16-bit register in the microprocessor C) a set of memory locations in R/WM reserved for storing information temporarily during the execution of computer D) a 16-bit memory address stored in the program counter

12. A stack pointer is
A) a 16-bit register in the microprocessor that indicate the beginning of the stack memory. B) a register that decodes and executes 16-bit arithmetic expression. C) The first memory location where a subroutine address is storeD) D) a register in which flag bits are stored

13.The branch logic that provides decision making capabilities in the control unit is known as
A) controlled transfer B) conditional transfer C) unconditional transfer D) none of above

14. Interrupts which are initiated by an instruction are
A) internal B) external C) hardware D) software

15. A skip instruction is a __________address instruction.
A) zero B) one C) two D) three

16. The reason why micro-programmed control unit is advantages are
A) easy to change of micro-programs B) slow speed C) operating system and high-level language support D) costly