Computer organization exam question paper BCA 2017 himanchal pardesh

B.C.A 3^rd semester examination

Computer organization exam question paper 2017 BCA

Q1. Perform the following conversion:

• (AF63)16 (…………..)2,(…………….)10
• (41.6875)10 (……….)2,(……………)16
• (F3A7C2)16 (…………)2,(…………..)8
• (736.4)8(……………….)10(……….)2

2. (A) Explain 2’s complement notation to represent binary numbers.

(b) Write a short note on BCD arithmetic.

(C) Discuss hamming code for error detection.

Unit-II

3. (a).What do you mean by bus and memory transfer?
   (b).Explain the working of bus system with 4-register and 4-multiplexer using diagram.

4. (a) what do you mean by micro operations.
   (b) Give the working and diagram of 4-bit binary adder.

Unit-III

5. (a) What is a register ? Explain the working and significant of a register in a basic computer.
   (b) Explain timing and control with respect to a basic computer.

6. (a) What do you mean by instruction cycle ?
   (b) Define routine and mapping in address sequencing.

Unit –VI

7. (a) Give the block diagram of CPU and also explain its working.
   (b)  Define control word.

8. (A) Computer various addressing modes used in a computer system.
   (b) Explain program status Word?

Unit-V

(Compulsory Question)

9. Attempt all parts:

Fill in the blanks:

• A group of bits that tell the computer to perform a specific operation is known as ………..
• Hexadecimal number (2FOAC)16 is equivalent to decimal number (……)10 .
• A collection of lines that connected several devices is called a ……..
• A binary digit is called a……….

State whether the statement is true /false:

• Arithmetic operation with fixed point numbers take longer time for execution as compared to with floating point numbers.
• An arithmetic shift left multiplies a signed binary number by2.

multiple choice questions

………… register keeps tracks of the instructions stored in program store in memory.

• AR (Address register)
• XR (Index register)
• PC (program counter)
• AC (Accumulator)

the circuit converting binary data into decimal is :

• Encoder
• Multiplexer
• Decoder
• Code converter

The circuit used to store one bit of data is known as :

• Register
• Encode
• Decoder
• Flip-Flop

In computer subtraction is generally carried out by:

• 9’s complement
• 10;s complement
• 1’s complement
• 2’s complement

Answer the following in 25 to 50 words:

• List out different types of interrupts.
• Discuss various types of instruction formats
• Explain circular shift in brief.
• Explain two-Address instruction
• What do you mean by reverse polish notation?
• Give example to explain the concept.