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WorksheetsNAND Gates, CPU Basics, and Networking Worksheet (Grade 13)
Total questions: 60
Worksheet time: 30mins
Which is a basic logic gate from which all Boolean functions can be derived?
AND
NAND
OR
XOR
What correctly describes a NAND gate's output when both inputs are 1?
0
1
Complement of AND output
Same as OR output
Which statement correctly describes NAND gates' universal property?
Can implement AND function
Can implement OR function
Any combinational circuit can use only NAND
Cannot implement NOT function
For F = (A·B)' implemented with only NAND gates, which is valid?
Single 2-input NAND with inputs A and B
AND gate followed by NOT gate
Two NAND gates in series
Three NAND gates in specific configuration
To implement XOR using only NAND gates, which would work?
Four NAND gates in specific arrangement
Three NAND gates with clever connections
Two NAND gates directly connected
Five NAND gates with redundancy
When simplifying Boolean expressions for NAND-only implementation, which step is essential?
Convert to Sum-of-Products form
Apply De Morgan's Theorem
Double invert the expression
Convert to Product-of-Sums form first
A circuit uses 5 NAND gates but could use 3. What likely caused inefficiency?
No Boolean simplification applied
Redundant inverters using NAND gates
Function inherently requires 5 gates
Direct translation without optimization
Comparing XOR implementation with NAND vs. NOR gates, which is accurate?
NAND typically uses fewer gates
Depends on available IC chips (7400 vs 7402)
NOR is generally more efficient
Both require same number of gates
Two implementations: A uses 8 NAND gates (12ns delay); B uses 6 NOR + 2 inverters (15ns delay). Which justifies choosing the slower option?
B consumes less power
B uses fewer transistors
NOR ICs are cheaper
B has more regular layout
Which is a CPU component?
Arithmetic Logic Unit
Control Unit
Main Memory
Registers
What is a primary stage in the CPU instruction cycle?
Fetch
Store to Disk
Decode
Write Back
How does multi-core improve performance vs single-core at the same clock speed?
Allows parallel instruction execution
Increases individual core clock speed
Enables better multitasking with threads
Reduces power per instruction
Which correctly distinguishes Computer Architecture from Organization?
Architecture defines ISA; Organization implements it
Including multiply instruction is architectural
Cache size is organizational
Architecture deals with logic circuits; Organization with user features
CPU at 3.0 GHz with CPI of 4. Which correctly calculates MIPS?
MIPS = (3.0×109)/(4×106)
MIPS = 3000 / 4
MIPS = 750
(1/(4×3.0×10−9))/106
For a low-power embedded device, which processor feature should be prioritized?
High clock speed (>4 GHz)
Simple RISC instruction set
Large L3 cache
Advanced power management states
CPU X uses CISC; CPU Y uses RISC. Both target similar performance. Which is likely true?
X has more complex control logic
Y relies more on compiler optimization
X has higher CPI
Y has longer, more complex instructions
System bottlenecks on slow memory access. Which directly helps?
Increasing CPU clock speed
Adding larger/faster cache
Implementing deeper pipeline
Using faster DRAM technology
Choosing between integrated GPU vs separate CPU+GPU: which favors integration?
Lower system cost and power
Higher peak graphics performance
Better thermal management
Reduced motherboard space
What is an essential network component?
At least two devices
Shared CPU
Communication medium
Shared resources/information
What is a primary purpose of business networks?
Sharing information/files
Sharing hardware resources
Isolating computers for security
Facilitating communication
In client-server model, which is correct?
Server controls resource access
Client grants access to server resources
Both client and server have equal control over shared resources
Access decisions are made by the network switch
Which is a peer-to-peer network characteristic?
No dedicated central server
More scalable for thousands of users
Centralized security management
Computers act as both clients and resource providers
Small office with 5 computers needs shared printing and files. Which setup is valid?
Dedicated Windows Server
Peer-to-peer workgroup
All computers and printer to switch with file sharing
Printer connected to one computer and shared
For managing sensitive payroll data, which practice is essential?
Store on central server with access controls
Place in shared folder for all employees
Encrypt data during transmission
Include regular backups
Shared printer bottlenecks with large documents. Which solution works?
Install dedicated print server with more memory
Implement print queue management
Increase file server clock speed
Move printer to separate network segment
Compared to "sneakernet," what is a network advantage?
No physical media movement
Guaranteed 100% accuracy
Near-instant sharing over distance
Inherently higher security
Choosing one network laser printer versus personal inkjets for 20 employees. Which supports shared printing?
Lower total cost of ownership
Higher print quality for all documents
Better resource utilization
Faster print speed for each user
Which is an input device?
Mouse
Monitor
Scanner
Printer
What defines a pointing device?
Controls cursor position
Used for text entry
Provides tactile feedback
Examples: mouse, trackball, touchscreen
How does LCD differ from CRT?
Thinner, lighter, less power
Uses cathode ray tube
CRT has better color/viewing angles
LCD suffers from flicker at low refresh
For a graphics design studio, which I/O device is critical?
High-resolution color-accurate monitor
High-speed dot-matrix printer
Large-format scanner/digitizing tablet
Basic keyboard and optical mouse
For printing architectural blueprints, which is essential?
High-resolution laser printer
Large-format plotter
Ability to print on roll paper (A1/A0)
50 pages/minute speed
Why are shared network lasers more cost-effective than individual inkjets?
Lower inkjet initial cost
Higher inkjet per-page cost
Laser reliability and duty cycle
Laser photorealistic image quality
Comparing QWERTY vs Dvorak keyboards, which is true?
QWERTY designed to slow typists
Dvorak increases speed, reduces movement
Dvorak is most common default
QWERTY dominance due to familiarity
School choosing between COM (microfilm) versus laser printers for archiving. When is COM better?
Extremely high volume (thousands daily)
Limited long-term storage space
Frequent need for photocopies
Must be readable without special viewer
Which gate is considered a universal gate?
NAND
AND
OR
XOR
De Morgan's Law states that:
(A+B)′=A′⋅B′
(A⋅B)′=A′+B′
A+B=(A′⋅B′)′
A⋅B=(A′+B′)′
To implement an AND gate using only NAND gates, you need:
One NAND gate
Two NAND gates
Three NAND gates
Four NAND gates
The Control Unit (CU) in a CPU is responsible for:
Performing arithmetic operations
Decoding instructions
Generating control signals
Managing data flow between CPU components
Which factor affects CPU performance?
Clock speed
Cache size
Number of cores
Instruction set architecture
In a RISC processor, which is typical?
Large set of complex instructions
Load/store architecture
Fixed-length instructions
Microcode implementation
Which is an advantage of a server-based network over peer-to-peer?
Centralized security management
Lower cost
Better scalability
No need for dedicated hardware
Network backups are important because:
They prevent hardware failure
They allow recovery from data loss
They improve network speed
They are required by law in some industries
Which is an example of a network peripheral?
Shared printer
Network-attached storage (NAS)
USB flash drive
Network scanner
Which is an advantage of laser printers over inkjet printers?
Lower cost per page
Better for photo printing
Faster printing speed
More reliable for high-volume printing
A touchscreen is an input device that:
Can be used without a separate pointing device
Detects finger or stylus contact
Is only available in resistive technology
Is commonly used in smartphones and tablets
Which statement about monitors is true?
Resolution is measured in pixels
Refresh rate is measured in Hertz (Hz)
CRT monitors are thinner than LCD monitors
Response time affects motion blur
Optical Character Recognition (OCR) is used to:
Read handwritten text
Convert printed text into digital text
Read barcodes
Recognize faces
To implement an OR gate using only NAND gates, how many NAND gates are needed?
One NAND gate
Two NAND gates
Three NAND gates
Four NAND gates
The expression (A⋅B⋅C)′ can be implemented using:
A single 3-input NAND gate
Two 2-input NAND gates
Three 2-input NAND gates
A 2-input NAND gate and an inverter
In a combinational circuit, which is a valid method to check for hazards?
Analyze the Karnaugh map for adjacent minterms not covered by the same prime implicant
Simulate with all possible input transitions
Check only the critical path
Ignore timing considerations
When designing sequential circuits, which flip-flop is commonly used?
D flip-flop
JK flip-flop
T flip-flop
SR latch
In microprocessor architecture, which is a characteristic of Harvard architecture?
Separate memory for instructions and data
Can fetch instructions and data simultaneously
Simpler bus structure
Lower performance than Von Neumann
Which technique is used for processor performance optimization?
Pipelining
Branch prediction
Speculative execution
Increasing only clock speed
The OSI model consists of how many layers?
5 layers
7 layers
4 layers
8 layers
Which is a function of the Transport layer in the OSI model?
End-to-end connection management
Error recovery
Physical addressing
Flow control
In virtual memory systems, which is a benefit of paging?
Eliminates external fragmentation
Allows programs larger than physical memory
Simplifies memory allocation
Reduces memory access time
Which I/O handling method allows the CPU to perform other tasks during I/O operations?
Interrupt-driven I/O
Direct Memory Access (DMA)
Programmed I/O
Memory-mapped I/O
Which is an advantage of interrupt handling in I/O operations?
CPU doesn't need to poll devices
Better CPU utilization
Faster response to I/O events
Simpler programming model
In assembly language, which is a valid use of the MOV instruction?
MOV AX, BX
MOV [BX], AX
MOV AX, 5
MOV CS, AX
