Computer Science Topics
Postgraduate level — Computer Science
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Basic Computers
Algorithms
Data Structures
Operating Systems
DBMS
Computer Networks
quiz Questions
Q181
An output function simplified using a 4-variable Karnaugh Map (K-Map) contains minterms at m(4, 5, 6, 7). Which core algebraic grouping configuration represents the most minimized product-of-sums (POS) form or sum-of-products (SOP) expression output?
W'X
WX'
Y'Z
W'YZ'
Explanation
Mapping m(4, 5, 6, 7) on a 4-variable K-Map (variables W, X, Y, Z where WX tracks the rows and YZ tracks the columns) forms a single contiguous quad of size 4 completely filling the second row. Across this row, W = 0 and X = 1 remain constant while Y and Z vary completely, minimizing cleanly to W'X.
Q182
A basic hardware logic chip converts characters using the EBCDIC encoding schema layout. What is the absolute bit length utilized by this legacy IBM standard to uniquely represent individual characters natively?
5 bits
7 bits
8 bits
16 bits
Explanation
EBCDIC (Extended Binary Coded Decimal Interchange Code) is an 8-bit character encoding system designed historically by IBM, capable of defining up to 256 distinct characters natively, unlike the 7-bit standard ASCII framework.
Q183
Which type of computer software infrastructure category natively contains system configurations like device drivers, disk partition defragmenters, and the primary operating system kernel wrapper layers?
Application Software matrix
System Software family
Custom Database firmware
Enterprise cloud framework
Explanation
System Software provides the baseline core environment running on a computer to operate hardware infrastructures directly and run background operational tasks safely, encompassing operating systems, device drivers, and system utility managers.
Q184
If an instruction fetch loop inside a computer microprocessor tracks data mapping across an 8-bit wide physical address bus layout natively, what is the absolute maximum memory byte location limit that this processing subunit can directly reference?
64 locations
128 locations
256 locations
512 locations
Explanation
The maximum memory reference threshold capacity is calculated mathematically as 2^n, where n represents the bit width width parameters of the hardware address bus lines. Thus, 2^8 = exactly 256 unique byte-addressable memory locations.
Q185
An output expression of a basic hardware matrix simplifies to the Boolean expression Y = A'B + AB'. Which specific digital logic gate natively computes this exact output profile in a single gate layout component?
XNOR Gate
XOR Gate
NAND Gate
NOR Gate
Explanation
The Boolean expression A'B + AB' defines the core logical operation of the Exclusive OR (XOR) gate, which characteristically generates a True (1) state output if and only if its binary inputs are unequal or complementary.
Q186
An electronic switching circuit represents output states using a 4-variable Boolean function. If the minterms are mapped on a Karnaugh Map (K-Map) at positions m(2, 3, 6, 7, 10, 11, 14, 15), what is the most simplified algebraic expression output?
Y
YZ
W'Y
X + Y
Explanation
Plotting minterms m(2, 3, 6, 7, 10, 11, 14, 15) on a 4-variable K-Map (variables W, X, Y, Z where WX represents rows and YZ represents columns) fills rows 01, 11, 10, and 00 for columns where YZ = 10 and 11. This forms a single massive octet of size 8 that spans all rows across columns 2 and 3. In these columns, the variable Y is consistently equal to 1, while W, X, and Z vary completely, simplifying perfectly to just 'Y'.
Q187
A data encoding interface maps information using a 4-bit binary sequence. If the system updates its register states to the decimal integer value 13, what is the exact configuration profile when converted into an 8-4-2-1 Binary Coded Decimal (BCD) structure?
1101
0001 0011
0011 0001
0001 0101
Explanation
In standard 8-4-2-1 BCD architecture, each individual decimal digit is encoded independently into its direct 4-bit binary equivalent vector. For the decimal number 13, the digit 1 maps cleanly to 0001, and the digit 3 maps cleanly to 0011. Combining them sequentially yields 0001 0011.
Q188
An output circuit expression for a basic digital matrix is configured as Y = (A + B)'. Which specific physical logic gate natively computes this exact output profile in a single component layout?
NAND Gate
NOR Gate
XOR Gate
XNOR Gate
Explanation
The mathematical expression Y = (A + B)' explicitly tracks the Boolean NOR operation, which behaves as an OR gate followed directly by an inverter stage, generating a binary '1' output if and only if both binary inputs are simultaneously set to '0'.
Q189
A high-performance processing hardware loop records a cache hit efficiency index of exactly 75%. If the internal cache access speed latency is 3 nanoseconds (ns) and tracking misses mandate falling back to main memory which registers an access speed latency of 60 nanoseconds (ns), what is the computed Effective Memory Access Time (EMAT)?
11.25 nanoseconds
17.25 nanoseconds
18.75 nanoseconds
45.00 nanoseconds
Explanation
Formula for Effective Access Time tracking metrics: EMAT = (Hit Rate × Cache Latency) + (Miss Rate × Main Memory Latency). Given parameters: Hit Rate = 0.75, Miss Rate = 1 - 0.75 = 0.25. Calculation: (0.75 × 3 ns) + (0.25 × 60 ns) = 2.25 ns + 15.00 ns = exactly 17.25 nanoseconds.
Q190
Which type of specialized computer software category functions as a core diagnostic optimization program to manage low-level hard drive volume space by tracking bad sectors and scanning file allocations?
Application Software wrapper
Utility Software program
Custom Database firmware
Compiler parser module
Explanation
Utility Software encompasses programs designed for infrastructure maintenance tasks—such as disk scanners, file diagnostic managers, configuration toolsets, and system compressors—to support internal processing safety layers cleanly.