Digital and Computer Organization

Assignment A

Q1. Explain register transfer language..
Q2. What are peripheral devices list them.
Q3. Describe the circuit implementation of function xy’+yz.
Q4. What is the difference between assembler, compiler and interpreter?
Q5. What are the different level of programming languages?

Assignment B
1. Explain memory hierarchy in brief .
2. what do you understand by parallel processing?
3. What is array processor and what is the role of attached array processor?
4. Draw The K-map for following truth table is
A B Y
0 0 0
0 1 0
1 0 1
1 1 1

Assignment C
Question 1: Where does a computer add and compare data?
a. Hard disk
b. Floppy disk
c. CPU chip
d. Memory chip

Question 2: Which of the following registers is used to keep track of address of the memory
location where the next instruction is located?
a. Memory Address Register
b. Memory Data Register
c. Instruction Register
d. Program Register

Question 3: A complete microcomputer system consists of
a. microprocessor
b. memory
c. peripheral equipment
d. all of above

Question 4: CPU does not perform the operation
a. data transfer
b. logic operation
c. arithmetic operation
d. all of above

strategy is called implement
a. instruction execution
b. instruction prefetch
c. instruction decoding
d. instruction manipulation

Question 6: 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

Question 7: 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

Question 8: 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

Question 9: Interrupts which are initiated by an instruction are
a. internal
b. external
c. hardware
d. software

Question 10: A time sharing system imply
a. more than one processor in the system
b. more than one program in memory
c. more than one memory in the system
d. None of above

Question 11: Processors of all computers, whether micro, mini or mainframe must have
a. ALU
b. Primary Storage
c. Control unit
d. All of above

Question 12: What is the control unit’s function in the CPU?
a. To transfer data to primary storage
b. to store program instruction
c. to perform logic operations
d. to decode program instruction

Question 13: What is meant by a dedicated computer?
a. which is used by one person only
b. which is assigned to one and only one task
c. which does one kind of software
d. which is meant for application software only
Question14: The most common addressing techiniques employed by a CPU is
a. immediate
b. direct
c. indirect
d. register
e. all of the above

Question 15: Pipeline implement
a. fetch instruction
b. decode instruction
c. fetch operand
d. calculate operand
e. execute instruction
f. all of above

Question 16: Which of the following code is used in present day computing was developed
by IBM corporation?
a. ASCII
b. Hollerith Code
c. Baudot code
d. EBCDIC code

Question 17: When a subroutine is called, the address of the instruction following the CALL
instructions stored in/on the
a. stack pointer
b. accumulator
c. program counter
d. stack

Question 18: A microprogram written as string of 0’s and 1’s is a
a. symbolic microinstruction
b. binary microinstruction
c. symbolic microprogram
d. binary microprogram

Question 19: Interrupts which are initiated by an instruction are
a. internal
b. external
c. hardware
d. software

Question 20: Memory access in RISC architecture is limited to instructions
a. CALL and RET
b. PUSH and POP
c. STA and LDA
d. MOV and JMP

Question 21: A collection of 8 bits is called
a. byte
b. word
c. record

Question 22: The ascending order or a data Hierarchy is
a. bit – bytes – fields – record – file – database
b. bit – bytes – record – field – file – database
c. bytes – bit- field – record – file – database
d. bytes -bit – record – field – file – database

Question 23: How many address lines are needed to address each memory locations in a
2048 x 4 memory chip?
a. 10
b. 11
c. 8
d. 12

Question 24:A computer program that converts an entire program into machine language at
one time is called a/an
a. interpreter
b. simulator
c. compiler
d. commander

Question 25:In immediate addressing the operand is placed
a. in the CPU register
b. after OP code in the instruction
c. in memory
d. in stack

Question 26:Microprocessor 8085 can address location upto
a. 32K
b. 128K
c. 64K
d. 1M

Question 27: The ALU and control unit of most of the microcomputers are combined and
manufacture on a single silicon chip. What is it called?
a. monochip
b. microprocessor
c. ALU
d. control unit

Question 28: When the RET instruction at the end of subroutine is executed,
a. the information where the stack is iniatialized is transferred to the stack pointer
b. the memory address of the RET instruction is transferred to the program counter
c. two data bytes stored in the top two locations of the stack are transferred to the program
counter
d. two data bytes stored in the top two locations of the stack are transferred to the stack
pointer

Question 29: A microporgram is sequencer perform the operation
a. read
b. write
c. execute
d. read and write
e. read and execute

Question 30: Interrupts which are initiated by an I/O drive are
a. internal
b. external
c. software
d. all of above

Question 31: In half adder EX-OR gate O/P is
a. Carry
b. Remainder
c. Sum
d. None of the above

Question 32: Half adder consist of __________ & _________ Gates.
a. EX- OR & AND
b. EX- OR & OR
c. EX- OR & NOT
d. None of the above

Question33: Subtract (1010)2 from (1101)2 using 1st complement..
a. (1100)2
b. (0011)2
c. (1001)2
d. (0101)2

Question34: Using 2’s Complement, subtraction, of (1010)2 from (0011)2 is
a) (0111)2
b) (1001)2
c) –(0111)2
d) –(1001)2

Question35: Full adder is constructed by using …………….
a) Two Half Adder& one OR gate
b) two OR gate &one HA
c) One HA & two OR gate
d) One OR gate & one HA

Question 36: The K-map eqn for following truth table is—–
A B Y
0 0 0
0 1 0
1 0 1
1 1 1

a) AB+AB
b) ĀB +AB
c) AB+AB
d) None of above .

Question37: K-map technique generally used up to ——–Variables
a) 2
b) 8
c) 7
d) 6 .

Question 38: What will be the hexadecimal equivalent of decimal number (54977)
a. D6C1
b.DC61
c. D6C5
d. none

Question 39: The address / data bus in 8085 is __________
a) Multiplexed
b)Demultiplexed
c) Decoded
d) Loaded

Question 40: A full adder:
a.) adds 2 bits fed to it
b.) adds 3 bits fed to it
c.) adds 2 bits fed to it and produces sum and carry bit
d.) adds 3 bits fed to it and produces sum and carry bit