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WorksheetsGEM of DLCO
Total questions: 65
Worksheet time: 1hrs 9mins
Change 278 to decimal
57
27
23
628 =
110102
1100102
110012
368 + 128 =
488
508
518
Octal is equal to ___ bits together
3
4
2
101010112 =
AB16
AC16
25316
2316 - F16
1816
1216
1416
44
4A
What is the basic function of a logic gate?
Performing basic logical functions
Cooking dinner
Playing music
Solving complex equations
Name two types of logic gates.
Flip-flop gate, Buffer gate
XOR gate, NOT gate
AND gate, OR gate
NAND gate, NOR gate
What is the purpose of a Karnaugh map in digital logic?
To make the digital logic circuit more complicated
To simplify Boolean algebra expressions and minimize the number of logic gates in a digital logic circuit
To create complex Boolean algebra expressions
To increase the number of logic gates in a digital logic circuit
How are Karnaugh maps used to simplify Boolean expressions?
By using trigonometric functions
By guessing and checking
By identifying patterns and common terms
By drawing random shapes
What is the function of an adder in digital logic circuits?
Divides binary numbers
Multiplies binary numbers
Subtracts binary numbers
Performs addition of binary numbers
Explain the difference between a half adder and a full adder.
A full adder can only add two single-bit numbers and produce a sum and a carry.
A half adder can add three single-bit numbers and produce a sum and a carry.
A half adder and a full adder are the same thing.
A half adder can only add two single-bit numbers and produce a sum and a carry. A full adder can add three single-bit numbers and produce a sum and a carry.
What is the role of a multiplexer in digital logic circuits?
It amplifies the input signals before sending them to the output
It converts analog signals to digital signals
It combines multiple input signals into a single output
It selects one of many input signals and routes it to a single output.
How does a demultiplexer differ from a multiplexer?
A demultiplexer takes multiple inputs and selects one of them to be the output, while a multiplexer takes a single input and routes it to one of many possible outputs.
A demultiplexer and a multiplexer are the same thing and can be used interchangeably.
A demultiplexer can only be used in digital circuits, while a multiplexer can only be used in analog circuits.
A demultiplexer takes a single input and routes it to one of many possible outputs, while a multiplexer takes multiple inputs and selects one of them to be the output.
What is the purpose of an encoder in digital logic circuits?
To amplify the input signals
To convert analog signals into digital signals
To convert multiple input signals into a coded output signal
To reduce the number of output signals
Explain the function of a decoder in digital logic circuits.
It converts coded inputs into a specific set of outputs.
It converts analog signals into digital signals.
It stores the input signals for future use.
It amplifies the input signals.
Explain the difference between a half adder and a full adder.
A full adder can only add two single-bit numbers and produce a sum and a carry.
A half adder can add three single-bit numbers and produce a sum and a carry.
A half adder and a full adder are the same thing.
A half adder can only add two single-bit numbers and produce a sum and a carry. A full adder can add three single-bit numbers and produce a sum and a carry.
What is the role of a multiplexer in digital logic circuits?
It amplifies the input signals before sending them to the output
It converts analog signals to digital signals
It combines multiple input signals into a single output
It selects one of many input signals and routes it to a single output.
What is the purpose of an encoder in digital logic circuits?
To amplify the input signals
To convert analog signals into digital signals
To convert multiple input signals into a coded output signal
To reduce the number of output signals
Which of the circuits in figure (a to d) is the sum-of-products implementation of figure (e)?
a
b
c
d
The device shown here is most likely a ________
Multiplexer
Demultiplexer
Comparator
Inverter
What type of logic circuit is represented by the figure shown below?
XOR
XNOR
XAND
XNAND
According to boolean law: A + 1 = ?
1
A
0
A'
DeMorgan’s theorem states that _________
(AB)’ = A’ + B’
(A + B)’ = A’ * B
A’ + B’ = A’B’
(AB)’ = A’ + B
Complement of the expression A’B + CD’ is _________
(A’ + B)(C’ + D)
(A’ + B)(C’ + D)
(A + B’)(C’ + D)
(A + B’)(C + D’)
The boolean function A + BC is a reduced form of ____________
AB + BC
A’B + AB’C
(A + B)(A + C)
(A + C)B
The logical sum of two or more logical product terms is called __________
SOP
POS
OR operation
NAND operation
The expression Y=AB+BC+AC shows the _________ operation.
EX-OR
OR
SOP
POS
A product term containing all K variables of the function in either complemented or uncomplemented form is called a __________.
∑ term
Midterm
Maxterm
Minterm
Latches and Flip flops are the examples of …………………. Logic circuits
Combinational
Sequential
The flip-flops which has not any invalid states are _____________
a) S-R, J-K, D
b) S-R, J-K, T
c) J-K, D, T
Which of the following logic expressions represents the logic diagram shown?
X=AB’+A’B
X=(AB)’+AB
X=(AB)’+A’B’
X=A’B’+AB
For the output F to be 1 in the logic circuit shown, the input combinations should be
A = 0, B = 1, C = 0
A = 1, B = 1, C = 1
A = 0, B = 0, C = 1
All of the above
Latches consist of
inductors
inverters
timing generators
frequency generators
In SR flip flop, input labeled 'S' stands for
Systematic
Static
Set
Stable
A basic S-R flip-flop can be constructed by cross-coupling of which basic logic gates?
AND or OR gates
XOR or XNOR gates
NOR or NAND gates
AND or NOR gates
You are having a D flip-flop, which you want to use as a J-K flip-flop. The input of the D flipflop in terms of external inputs J and K can be written as (Consider Qn is the output of the D flip-flop)
a. D = JQn + KQn
b. D = J’Qn + K’Qn
c. D = JQ’n + K’Qn
d. D = JQ’n + KQ’n
Which of the following statements is NOT correct?
a. Race around condition occurs in a JK latch when both the inputs are one.
b. A flip flop is used to store one bit information.
c. A transparent latch is D-type flip-flop with enable (level triggered) in place of a clock.
d. Master-slave configuration is used in flip-flop to store two bits information.
Register to register architecture comes in which processor model?
SIMD processor
Vector Processor
Scalar Processor
None of the above
What is a high performance multi-core processor that can be used to accelerate a wide variety of applications using parallel computing.
CPU
GPU
CLU
Multiple-applications independently running, are typically called
Multi threading
Multi Programming
Multi tasking
Synchronization
__________________________is the interleaved execution of more than two processes by a sole CPU computer system.
Multiprocessing
Multiprogramming
Multitasking
all
How many significant digits does the floating point number 0.03140 × 103 have?
6
5
4
3
If f(x) is a real-valued function of a real variable, then the error in the
difference approximation for the derivative
absolute
relative
cancellation
truncation
In floating-point arithmetic, which of the following operations on two positive floating-point numbers can produce an overflow?
addition and subtraction
multiplication and division
All
None
The addressing mode/s, which uses the PC instead of a general purpose register is ______
Indexed with offset
Relative
Direct
Both Indexed with offset and direct
In CISC architecture most of the complex instructions are stored in _____
CMOS
Register
Transistors
Diodes
Which memory gives the illusion to the user that they will have main memory equal to the capacity of secondary storage media.
Auxiliary Memory
Main Memory
Cache Memory
Virtual Memory
The essential content(s) in each entry of a page table is / are
Virtual page number
Page Frame number
Both virtual page number and page frame number
Access right information
Virtual memory is necessary when ...
RAM is full
ROM is full
SSD is full
HDD is full
7. The name set-associative mapping is derived from the fact that
Each data word is present in a set
An associative match logic applied
Cache contains two or more words with same index address as a set
Tag field present as a set
The DMA transfers are performed by a control circuit called as __________
Device interface
DMA controller
Overlooker
Data controller
The DMA controller has _______ registers.
1
2
3
4
What is Direct Memory Access (DMA)?
DMA is a technique that requires the CPU to manage all data transfers.
DMA is a protocol used for network communication between devices.
DMA is a type of memory that stores data temporarily during processing.
Direct Memory Access (DMA) is a method that allows hardware devices to transfer data to and from memory without involving the CPU.
How does DMA improve system performance?
DMA only works with specific types of memory.
DMA increases CPU workload by managing data transfers.
DMA improves system performance by allowing direct data transfer between memory and peripherals, reducing CPU workload.
DMA requires constant CPU intervention for data transfer.
What are the main components involved in DMA?
DMA controller, system bus, memory, and peripheral devices.
Graphics card, sound card, monitor, and printer.
Network interface, power supply, display, and keyboard.
CPU, RAM, hard drive, and software applications.
What is the immediate addressing mode?
The operand is fetched from memory using an address.
The operand is calculated at runtime.
The operand is directly specified in the instruction.
The operand is stored in a register.
How does direct addressing mode work?
The instruction uses a register to hold the operand's address.
The operand's address is calculated at runtime.
In direct addressing mode, the operand's address is given explicitly in the instruction.
The operand is always stored in the accumulator.
