Table of Content (toc)
1. A subtractor is not usually present in a computer because -
-
It is expensive
It is not possible to design it
The adder will take care of subtraction
2. Overflow occurs when -
-
data is out of range
data is within range
none of these
3. When the RET instruction at the end of subroutine is executed
4. Which of the following comment about the program counter is true ?
-
It is used to count the number of instruction.
It is a cell in ROM
During execution of the current instruction,its count changes
5. _________ register keeps tracks of the instructions stored in program stored in memory.
-
AR (Address Register)
XR (Index Register)
PC (Program Counter)
6. Virtual memory consists of _______.
-
Static RAM
Dynamic RAM
Magnetic memory
7. The number of the memory location that a CPU with a 16-bit program counter can address
-
16k
64k
256k
8. 2's complement form of a binary number 10101
-
01010
01111
01011
9. In a program using subroutine call instruction, it is necessary______.
-
initialize program counter
Clear the accumulator
Reset the microprocessor
10.The following logic building block can be used to implement any combinational logic circuit
-
Decoder
Multiplexer
Ex-Or gate
11. Number of bits used in EBCDIC code -
-
16
12. In which of the following gates, the output is 1 if and only if at least one input is 1?
-
OR
NOR
AND
13. Which memory is difficult to interface with processor?
-
static memory
dynamic memory
ROM
14. Binary equivalent of 25.19 is
-
10001.0011
11001.0011
10111.0101
15. Excess-3 code of binary number 011 is
-
100
110
16. Computer architecture is abstracted by its instruction set, which includes ___, ___, ___ & ___
-
opcode, addressing modes, registers, virtual memory
Pipelining, Rectorization, concurrency, opcode
Addressing modes, Pipelining, Register, opcode
17. The register that includes the address of the memory unit is termed as the :
-
MAR
PC
IR
18. A character in ASCII is represented by
-
4 bits
6 bits
8 bits
19. The circuit used to store one bit of data is known as
-
Encoder
OR gate
Flip Flop
20. Which of the following logic families is well suited for high speed operations ?
-
TTL
ECL
MOS
21. Program counter is
-
9 register
a program which counts.
a counter used in programming
22. Characteristic of RISC (Reduced Instruction Set Computer) instruction set is
-
three instructions per cycle
two instructions per cycle
one instruction per cycle
23.The part of a computer that coordinates all its functions is called its
-
Arithmetic logic unit
System board
ROM program
24. Accumulator is a
-
processor
register
control unit
25.A Stack-organised Computer uses instruction of _____.
-
Indirect addressing
Two-addressing
Zero addressing
26. A module 20 counter can be designed using
-
4 flip-flops
20 flip-flops
5 flip-flops
27.Which of the following is not a register?
-
buffer
stack
program counter
28. Consider the following statements with respect to parallelism in pipelining:
1. When two or more instructions that are independent of each other, overlap, they are called Dynamic Scheduling.
2. Straight line parallelism is always greater than loop level parallelism.
State True or False:
-
1- True, 2- True
1- True, 2- False
1- False, 2- False
29. Which language is termed as the symbolic depiction used for indicating the series:
-
Random transfer language
Register transfer language
Arithmetic transfer language
30. Computer architecture is abstracted by its ___.
-
Instruction
Instruction set
Organization
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