IIT JEE/Programming Computer Architecture Sample Test,Sample questions

Question:
#2?s complement of -13 = 11110011 Add the two numbers in their 2?s complement form including their sign bits and discard any carry out of the sign (leftmost) bit position. So the answer is 11101101 (-19). -6 11111010 -13 11110011 ---------------------- -19 11101101 #6. Which one of the following CPU registers holds the address of the instructions (instructions in the program stored in memory) to be executed next?IR (Instruction Register)

1.MAR (Memory address register)

2.MBR (Memory Buffer Register)

3.AC (Accumulator)

4.PC (Program Counter)


Question:
.Boolean functions expressed as a --------- of minterms or ---------- of maxterms are said to be in a canonical form.

1.Product Sum

2.Sum Product

3.Subtract Divide

4.Divide Subtract


Question:
.Information transfer from one register to another is designated in symbolic form by means of

1.Control Function

2.Op Code

3.Registers

4.Replacement Operator


Question:
2?s complement of -13 = 11110011 Add the two numbers in their 2?s complement form including their sign bits and discard any carry out of the sign (leftmost) bit position. So the answer is 11101101 (-19). -6 11111010 -13 11110011 ------------------ -19 11101101 #38. Which one of the following CPU registers holds the address of the instructions (instructions in the program stored in memory) to be executed next?IR (Instruction Register)

1.MAR (Memory address register)

2.MBR (Memory Buffer Register)

3.AC (Accumulator)

4.PC (Program Counter).


Question:
64K memory contains how many words of 8 bits each?

1.65,536

2.64,536

3.65,436

4.65,546


Question:
A combinational circuit that converts binary information from n input lines to a maximum of unique output lines is

1.Decoder

2.Encoder

3.Full-adder

4.None of these


Question:
A full-adder is simply a connection of two half-adders joined by

1.AND gate

2.OR gate

3.NAND gate

4.NOR gate


Question:
A full-adder is simply a connection of two half-adders joined by a

1.AND gate

2.OR gate

3.NAND gate

4.NOR gate


Question:
Consider the following logic function f(ABC). f(ABC) = ( A + B + C?) . (A + B?+ C?) Which of the following would be the result if the above logic function is to be simplified using k-maps?

1.C? + A

2.C + C?A?

3.C.A?

4.C?.A


Question:
Convert decimal value (888)10 to base-5.(444)5

1.(444)5

2.(12023)5

3.(131313)5

4.(12021)5


Question:
Given the characteristic table of a JK flip-flop find the missing output value. J K Q(t+1) 0 0 Q(t) 0 1 0 #1 0 1 #1 1 ---

1.Q(t)

2.Q?(t+1)

3.1

4.Q?(t)


Question:
Given the characteristic table of a JK flip-flop find the missing output value. J K Q(t+1) 0 0 Q(t) 0 1 0 #1 0 1 #1 1 ---

1.Q(t)

2.Q?(t+1)

3.1

4.Q?(t)


Question:
he gray code of a given binary number 1001 is

1.1110

2.110

3.1101

4.1111


Question:
he registers found in the processor unit are

1.Operational registers

2.Memory registers

3.Binary registers

4.Storage registers


Question:
In which type of flip-flop the indeterminate condition of the SR flip-flop (when S=R=1) is eliminated?

1.Edge-triggered flip-flop

2.JK flip-flop

3.D flip-flop

4.T flip-flop


Question:
In which type of flip-flop the indeterminate condition of the SR flip-flop (when S=R=1) is eliminated?T flip-flop

1.Edge-triggered flip-flop

2.JK flip-flop

3.D flip-flop

4.T flip-flop


Question:
Information transfer from one register to another is designated in symbolic form by means of a

1.Control Function

2.Op Code

3.Registers

4.Replacement Operator


Question:
System Software usually includes a program called a -------- which helps the programmer find errors in a program.

1.Write Buffer

2.Read Buffer

3.Debugger

4.Both (opt1) and (opt3) above


Question:
Techniques that automatically move program and data blocks into the physical main memory when they are required for execution are called

1.Associative-Mapping techniques

2.Main Memory techniques

3.Virtual Memory techniques

4.Cache Memory techniques


Question:
Techniques that automatically move program and data blocks into the physical main memory when they are required for execution are calledVirtual Memory techniques

1.Associative-Mapping techniques

2.Main Memory techniques

3.Virtual Memory techniques

4.Cache Memory techniques


Question:
The bulk of the binary information in a digital computer is stored in memory but all computations are done in

1.Timing Control

2.Memory Registers

3.Processor Registers

4.Program Control


Question:
The bulk of the binary information in a digital computer is stored in memory but all computations are done in

1.Timing Control

2.Memory Registers

3.Processor Registers

4.Program Control


Question:
The control condition is terminated with

1.Comma

2.Semicolon

3.Colon

4.Hash


Question:
The correspondence between the main memory blocks and those in the cache is specified by

1.Mapping function

2.Replacement algorithm

3.Hit rate

4.Miss penalty


Question:
The correspondence between the main memory blocks and those in the cache is specified by aPage fault

1.Miss penalty

2.Replacement algorithms

3.Hit rate

4.Mapping functions.


Question:
The CPU nearly delays its operation for one memory cycle to allow direct memory I/O transfer. This process is called

1.Burst transfer

2.Cycle waiting

3.Cycle stealing

4.Cycle interrupting


Question:
The DMA transfer technique where transfer of one word data at a time is called

1.Cycle stealing

2.Memory stealing

3.Hand-shaking

4.Inter-leaving


Question:
The number of 256*4 RAM chips required to construct 2KB CACHE is

1.8

2.2

3.4

4.16


Question:
The one major advantage of CMOS is its #34. The one major advantage of CMOS is itsHigh propagation delay

1.Low propagation delay

2.High propagation delay

3.Very low propagation delay

4.Very high propagation delay


Question:
The processor ---------- and I/O Devices are interconnected by means of a common bus. #17. The processor ---------- and I/O Devices are interconnected by means of a common bus.Main Memory

1.Cache Memory

2.Auxiliary Memory

3.Virtual Memory

4.Main Memory


Question:
The processor _________ and I/O Devices are interconnected by means of a common bus. #49. The processor _________ and I/O Devices are interconnected by means of a common bus.

1.Cache Memory

2.Auxiliary Memory

3.Virtual Memory

4.Main Memory


Question:
The registers found in the processor unit are

1.Operational registers

2.Memory registers

3.Storage registers

4.Binary registers


Question:
The set of physical addresses is called

1.Disk Space

2.Address Space

3.Pages

4.Frames


Question:
The simplest way to determine cache locations in which to store memory blocks is the

1.Associative Mapping technique

2.Direct Mapping technique

3.Set-Associative Mapping technique

4.Indirect Mapping technique


Question:
The simplest way to determine cache locations in which to store memory blocks is the

1.Associative Mapping technique

2.Direct Mapping technique

3.Set-Associative Mapping technique

4.Indirect Mapping technique


Question:
The sum of -6 and -13 using 2?s complement addition is

1.11100011

2.11110011

3.11001100

4.11101101


Question:
The sum of -6 and -13 using 2?s complement addition is

1.11100011

2.11110011

3.11001100

4.11101101


Question:
The transfer of new information into the register is called

1.Execution

2.Loading

3.Shifting

4.Configuring


Question:
To convert octal code to binary code which of the following digital functions should be used?

1.Decoder

2.Encoder

3.Multiplexer

4.Demultiplexer


Question:
To convert octal code to binary code which of the following digital functions should be used?

1.Decoder

2.Encoder

3.Multiplexer

4.Demultiplexer


Question:
What are the building blocks of combinational circuits?Registers

1.Flip-flops

2.Logical gates

3.Latches

4.Full-subtractor


Question:
What are the building blocks of combinational circuits?Registers

1.Flip-flops

2.Logic gates

3.Latches

4.Registers


Question:
What are the major components of a CPU?

1.Control Unit Register Set Arithmetic Logic Unit

2.Control Unit Memory Unit Arithmetic Logic Unit

3.Memory Unit Arithmetic Logic Unit Auxiliary Memory

4.Register Set Control Unit Memory Unit


Question:
What are the major components of a CPU?Control Unit Register Set Arithmetic Logic UnitControl Unit Memory Unit Arithmetic Logic Unit

1.Control Unit Register Set Arithmetic Logic Unit

2.Control Unit Memory Unit Arithmetic Logic Unit

3.Memory Unit Arithmetic Logic Unit Auxiliary Memory

4.Register Set Control Unit Memory Unit


Question:
What are the missing values in the truth table of a half-adder given below? x y C S 0 0 -- -- 0 1 0 1 #1 0 0 1 #1 1 1 0

1.x

2.y

3.0

4.1


Question:
What does T stands for in T flip-flop?

1.Top

2.Type

3.Toggle

4.Tickle


Question:
What does T stands for in T flip-flop?

1.Top

2.Type

3.Toggle

4.Tickle


Question:
What interface is used to connect the processor to I/O devices that require transmission of data one bit at a time?

1.Parallel

2.Serial

3.Output

4.Input


Question:
What is Q when S = 1 and R = 1 for SR flip-flop?Complement of previous output

1.No Change

2.Clear to 0

3.Set to 1

4.Indeterminate.


Question:
What is Q when S = 1 and R = 1 for SR flip-flop?Set to 1

1.No Change

2.Clear to 0

3.Complement of previous output

4.Indeterminate.


Question:
What is the name of device that is allowed to initiate data transfer on the bus?

1.Bus Master

2.Bus Arbitration

3.Bus Cycle

4.Bus Request


Question:
What is the purpose of RAID system?

1.It increases the processor speed

2.It increases the disk storage capacity

3.It increases the disk storage capacity and availability

4.It increases operating system efficiency


Question:
Which of the following modes are used to handle data transfer to and from peripherals?

1.Programmed I/O

2.Programmed I/O

3.Interrupted-initiated I/O

4.Programmed I/O Interrupted-initiated I/O Direct memory access


Question:
Which of the following representation requires the least number of bits to store the number +255?

1.BCD

2.2?s complement

3.1?s complement

4.Unsigned binary


Question:
ystem Software usually includes a program called a _______  which helps the programmer to find errors in a program.

1.Write Buffer

2.Read Buffer

3.Debugger

4.Both (opt1) and (opt3) above


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