Computer Science Topics
Postgraduate level — Computer Science
Choose question count and time — session stays in your browser only.
filter_alt Topics
Basic Computers
Algorithms
Data Structures
Operating Systems
DBMS
Computer Networks
quiz Questions
Q121
In basic computer hardware numbering systems, what is the exact binary code representation for the hexadecimal character 'A'?
1001
1010
1100
1111
Explanation
The hexadecimal character 'A' represents the decimal value 10. Converting the decimal number 10 into a 4-bit binary sequence yields 1010, calculated as (1 × 2³) + (0 × 2²) + (1 × 2¹) + (0 × 2⁰) = 8 + 0 + 2 + 0 = 10.
Q122
Which type of foundational computer logic gate outputs a binary '1' if at least one of its input bits is set to '1'?
AND Gate
OR Gate
NOT Gate
NAND Gate
Explanation
The OR logic gate outputs a True (1) state if any or all of its inputs are True (1). It only outputs a binary '0' when all of its input bits are simultaneously set to '0'.
Q123
Which fundamental basic computer peripheral device maps coordinates using an electromagnetic or radio frequency grid layout to track a specialized active pen interface?
Flatbed scanner
Graphics Tablet / Digitizer
Optical barcode wand
Thermal plotter roll
Explanation
A Graphics Tablet (or Digitizer) consists of an electronic surface tracking layout that detects the precise continuous coordinates of a specialized stylus, translating human drawing vectors into digital art matrices.
Q124
What is the primary technical objective of implementing dynamic refresh cycles inside main memory Dynamic RAM (DRAM) architecture frameworks natively?
To clear old microprocessor instruction pipelines dynamically
To systematically recharge internal capacitors to prevent stored binary data bits from decaying
To bypass the clock pulses running along address tracking paths
To compile application software buffers into permanent ROM clusters
Explanation
DRAM blocks store binary data bits using microscopic capacitors that naturally leak electrical charge over time. System hardware must continuously rewrite or refresh these charges thousands of times per second to prevent absolute memory state decay.
Q125
Which measurement unit represents the base storage capacity parameter containing exactly 4 binary data bits inside tracking architectures?
1 Bit cell
1 Nybble block
1 Byte structure
1 Word matrix
Explanation
In computer data metrics frameworks, a collection of exactly 4 binary bits is defined as one Nybble (or half a byte).
Q126
In basic computer hardware math, what is the exact decimal value represented by the binary code sequence 1010?
8
10
12
14
Explanation
To convert the binary number 1010 to its decimal equivalent, we calculate positional base-2 tracking columns: (1 × 2³) + (0 × 2²) + (1 × 2¹) + (0 × 2⁰) = 8 + 0 + 2 + 0 = 10.
Q127
Which type of foundational computer logic gate outputs a binary '0' if and only if both of its input bits are simultaneously set to '1'?
AND Gate
NOR Gate
NAND Gate
XOR Gate
Explanation
The NAND gate functions as an inverted AND gate (Not AND). It produces a '0' output only when all its inputs are '1'; for any other combination of inputs, it outputs a '1'.
Q128
Which fundamental basic computer peripheral device maps physical handwriting or drawing vectors using an active electromagnetic stylus pane interface?
Flatbed transparency scanner
Graphics Tablet / Digitizer
Laser phototypesetter array
Optical mark decoder unit
Explanation
A Graphics Tablet (or Digitizer) consists of an electronic flat tracing layer that accurately tracks the position of a specialized stylus pen, allowing users to draw graphics directly into standard system design formats.
Q129
What is the primary technical parameter that explains why Dynamic RAM (DRAM) requires periodic dynamic refresh cycles inside main memory hardware frameworks?
To clear obsolete CPU microprocessor instruction pipelines dynamically
Because it stores binary data in tiny capacitors that constantly leak charge and mandate systematic recharges
To bypass the execution clock timing pulses generated along system buses
To compile application software buffers into permanent system ROM chips
Explanation
DRAM cells store data bits using microscopic capacitors that continuously leak electrical charge over time. Because of this natural decay, memory controllers must systematically recharge these cells thousands of times per second to prevent data loss.
Q130
Which measurement unit represents the base storage capacity parameter containing exactly 4 binary data bits inside tracking architectures?
1 Bit matrix
1 Nybble block
1 Byte frame
1 Word cluster
Explanation
In machine computing logic and storage metrics, a collection of exactly 4 binary data bits is called a Nybble (which is equivalent to exactly half of a standard byte).