CPN Computer Professional Examination Level I (CPE I) (Nigeria)

Which of the following describes the key difference between Random Access Memory (RAM) and Read-Only Memory (ROM) in a computer system?

• ARAM is volatile and stores temporary runtime data, whereas ROM is non-volatile and stores…
• BRAM is non-volatile and holds user files, while ROM is volatile and processes arithmetic…
• CRAM holds the BIOS/UEFI boot instructions permanently, whereas ROM holds the operating sy…
• DRAM requires constant backup to secondary storage to retain its contents when powered dow…

Which component of the Central Processing Unit (CPU) is responsible for executing logical operations and mathematical calculations?

• AArithmetic Logic Unit (ALU)
• BControl Unit (CU)
• CSystem Register Block
• DL1 Cache Controller

What is the primary function of an Operating System (OS) in a standard computer setup?

• AManaging hardware resources and providing a common interface for application software.
• BCompiling source code written in high-level programming languages into machine binary.
• CPreventing all forms of unauthorized network intrusion and malware infections by default.
• DDesigning and editing relational database schemas for enterprise applications.

How do primary storage and secondary storage differ regarding data access speeds and persistence?

• APrimary storage is faster and volatile, while secondary storage is slower and non-volatil…
• BPrimary storage is slower and non-volatile, while secondary storage is faster and volatil…
• CPrimary storage resides outside the computer chassis, while secondary storage resides on…
• DPrimary storage requires disk-formatting before partition, while secondary storage is rea…

What is the binary representation of the decimal number 13?

• A1101
• B1011
• C1110
• D1001

Perform the binary addition of the values 1010 and 0101. What is the result?

• A1111
• B10000
• C10101
• D1100

Convert the binary number 10111 to its decimal equivalent.

• A23
• B19
• C27
• D21

What is the primary function of system cache memory (L1, L2, L3) in computer processor architecture?

• AStoring recently or frequently accessed instructions and data close to the CPU core to re…
• BHolding the basic hardware boot sector code permanently for the BIOS bootstrap loader.
• CActing as a low-cost backup device to replace damaged motherboard RAM chips.
• DEnabling network cards to buffer outgoing network traffic frames without processor interr…

Which of the following statements best explains the concept of virtual memory in operating systems?

• AIt uses space on a secondary storage drive (like an SSD or HDD) to simulate additional ph…
• BIt refers to a cloud-based memory subscription that increases hardware memory over the in…
• CIt is memory that exists only within virtual machines running under a hypervisor.
• DIt is a special secure partition of RAM used solely to store kernel-mode encrypted passwo…

Which pair of devices consists of one input device and one output device, respectively?

• AFlatbed scanner and drum plotter
• BBarcode reader and optical mouse
• CDot-matrix printer and laser printer
• DDigital keyboard and microphone

Why are Solid State Drives (SSDs) generally preferred over traditional Hard Disk Drives (HDDs) for system drives?

• ASSDs use solid-state flash memory and have no moving parts, offering much faster access t…
• BSSDs store data magnetically on rotating platters, making them less prone to logical corr…
• CSSDs have an unlimited number of write cycles and are much cheaper per terabyte than HDDs.
• DSSDs use lasers to burn permanent pits into reflective material, creating an unerasable b…

What is the role of the basic BIOS/UEFI firmware during the computer boot process?

• AIt performs the Power-On Self-Test (POST) to initialize hardware components and loads the…
• BIt compiles high-level code into executable binaries and manages application window layou…
• CIt establishes internet connectivity and sets up firewall packets before the OS loads.
• DIt checks the computer motherboard for dust accumulation and cleans thermal paste anomali…

What is the difference between multiprocessing and multitasking in computing terminology?

• AMultiprocessing involves multiple CPU cores running tasks simultaneously, while multitask…
• BMultiprocessing is a low-level language structure, while multitasking is a database synch…
• CMultiprocessing requires optical computing connections, while multitasking requires wirel…
• DMultiprocessing is limited to mainframe hardware, while multitasking is limited to mobile…

How does system software differ from application software?

• ASystem software manages hardware operations and boot processes, while application softwar…
• BSystem software is compiled, while application software is always interpreted line-by-lin…
• CSystem software is stored in volatile RAM permanently, while application software is stor…
• DSystem software requires internet connectivity to start, while application software is co…

Which of the following is categorized as a utility program rather than application software?

• ADisk Defragmenter
• BWeb Browser
• CElectronic Spreadsheet
• DDesktop Publishing Suite

What is the purpose of the File Allocation Table (FAT) in older file systems?

• AIt acts as an index directory mapping files to their physical clusters on the disk drive.
• BIt compresses large image attachments automatically before network transfer.
• CIt encrypts user login passwords using a hardware-based hash function.
• DIt monitors CPU temperature and adjusts system cooling fans.

Which characteristic uniquely defines a Real-Time Operating System (RTOS)?

• AIt guarantees that operations are completed within strict, predictable time constraints (…
• BIt operates solely through a 3D graphical user interface with real-time physics engines.
• CIt requires constant, sub-millisecond connection to a synchronization server.
• DIt executes tasks only when the computer is completely disconnected from external power.

Which capability best differentiates electronic spreadsheet software from standard word processing software?

• AThe ability to automatically calculate cells using mathematical formulas and dynamic data…
• BThe ability to insert typographic fonts, colors, and headers in paragraphs.
• CThe capability to compile source code into executable binary applications.
• DThe feature to print a document on physically connected laser printers.

What is the binary equivalent of the hexadecimal value A5?

• A10100101
• B10110101
• C10101010
• D10010101

What does the clock speed rating (e.g., 3.5 GHz) of a computer processor represent?

• AThe number of fetch-decode-execute instruction cycles the CPU can execute per second.
• BThe data transmission speed of the system bus connecting RAM to the storage drive.
• CThe thermal cooling rate of the heatsink assembly measured in gigabytes.
• DThe time taken to completely charge motherboard backup battery capacitors.

In software development, which statement best defines the term "algorithm"?

• AA step-by-step, finite sequence of instructions designed to solve a specific problem or p…
• BA hardware chip integrated into motherboards to decrypt passwords automatically.
• CA compiling tool that formats syntax files into PDF documentation.
• DA database table that stores user credentials in encrypted formats.

Which geometric shape is standard in programming flowcharts to represent a decision block (e.g., if-statement)?

• ADiamond
• BParallelogram
• CRectangle
• DOval

What operation does a parallelogram represent in a standard programming flowchart?

• AInput/Output operations
• BProcess operations
• CDecision logic paths
• DTerminal boundaries

What is the characteristic behavior of a sequence control structure in programming?

• AStatements are executed one after another in the exact order they are written in the sour…
• BStatements are skipped based on Boolean conditions evaluated dynamically.
• CStatements are repeated in a loop until a counter reaches zero.
• DStatements are executed concurrently in parallel threads across multiple processors.

Which programming construct represents a selection control structure?

• AIf-Then-Else statement
• BFor-Next loop
• CVariable assignment
• DArray declaration

What is the function of a loop control structure (iteration) in software programming?

• ATo repeat a block of code continuously as long as a specified condition remains true.
• BTo verify that variable names follow camel-case naming guidelines.
• CTo shut down the computer system when an application finishes execution.
• DTo copy data fields from primary memory registers to external magnetic backups.

What is the primary difference between a pre-test loop (e.g., While) and a post-test loop (e.g., Do-While / Repeat-Until)?

• AA post-test loop guarantees that the loop body will execute at least once, whereas a pre-…
• BA pre-test loop runs only on server hardware, whereas a post-test loop is restricted to l…
• CA pre-test loop does not allow variable updates inside the body, whereas a post-test loop…
• DA post-test loop requires compiler optimization, whereas a pre-test loop is interpreted.

How is a "variable" defined in the context of computer programming?

• AA named memory location used to store data that can change during program execution.
• BA coding syntax error that occurs when compiling without internet connections.
• CA constant integer parameter that cannot be modified once set.
• DAn electrical signal on motherboard tracks that fluctuates in voltage.

What does the term "scope of a variable" refer to in software logic?

• AThe region of a program where the variable is defined and can be accessed or modified.
• BThe total number of bytes allocated to the variable inside secondary memory.
• CThe level of cryptographic security applied to the variable name.
• DThe speed at which the variable value is read from processor caches.

In programming, what is recursion?

• AA programming technique where a function calls itself to solve a smaller subproblem of th…
• BAn error where a program gets stuck in a loop and consumes all available system RAM.
• CThe process of translating machine instructions back into readable source code.
• DA database query that combines tables from multiple external servers.

Which of the following defines the "array" data structure?

• AA collection of elements of the same data type stored in contiguous memory locations.
• BA list of key-value pairs stored dynamically on external network drives.
• CA collection of unrelated functions defined inside different namespaces.
• DA hardware register that stores floating-point mathematical calculations.

How does the Bubble Sort algorithm organize an unsorted list of numbers?

• AIt repeatedly steps through the list, compares adjacent elements, and swaps them if they…
• BIt divides the list into halves, sorts each half recursively, and merges them back togeth…
• CIt selects a pivot element and partitions the array into values smaller and larger than t…
• DIt randomly shuffles the elements until it detects that the list is sorted by chance.

What is the strict prerequisite constraint for executing a Binary Search algorithm on a list of elements?

• AThe list elements must be sorted in ascending or descending order.
• BThe list must contain only integer variables, with zero floats.
• CThe list must be stored on external magnetic tape media.
• DThe list size must be a power of two.

What is the worst-case time complexity (Big O notation) of the Linear Search algorithm on an array of n elements?

• AO(n)
• BO(log n)
• CO(n²)
• DO(1)

What is the worst-case time complexity (Big O notation) of the Binary Search algorithm on a sorted array of n elements?

• AO(log n)
• BO(n)
• CO(n log n)
• DO(1)

Which of the following describes the operational principle of the Queue data structure?

• AFirst-In, First-Out (FIFO)
• BLast-In, First-Out (LIFO)
• CRandom-Access, Random-Deletion (RARD)
• DHighest-Value, First-Out (HVFO)

Which of the following describes the operational principle of the Stack data structure?

• ALast-In, First-Out (LIFO)
• BFirst-In, First-Out (FIFO)
• CFirst-In, Last-Out (FILO) only (without LIFO equivalence)
• DSequential-Access, Direct-Delete (SADD)

How do compilers and interpreters differ in how they translate source code into machine code?

• AA compiler translates the entire source code program at once into an executable file, whe…
• BA compiler runs code only on mainframes, while an interpreter runs code only on local com…
• CA compiler makes code run slower, while an interpreter makes code run faster.
• DA compiler is a physical hardware board, while an interpreter is a software script.

Which of the following describes a syntax error in programming?

• AA violation of the grammatical rules of the programming language that prevents compiling.
• BAn error that occurs when the program attempts to divide a number by zero during executio…
• CAn error that produces incorrect output calculations but runs without crashing.
• DAn error caused by hardware power surges during code execution.

How does a logical error differ from a runtime error in programming diagnostics?

• AA logical error allows the program to run but produces incorrect results, whereas a runti…
• BA logical error occurs only in assembly language, while a runtime error occurs only in hi…
• CA logical error is detected by the compiler immediately, while a runtime error is never d…
• DA logical error requires database restructuring, while a runtime error requires hardware…

What is the defining characteristic of high-level programming languages compared to low-level languages?

• AThey are closer to human language and abstract away hardware details, whereas low-level l…
• BThey run only on fast computers with graphic accelerators.
• CThey do not require memory allocation operations.
• DThey are designed exclusively for writing operating system kernels.

What is the purpose of writing program pseudocode during the software planning phase?

• ATo express algorithmic logic in structured English before writing actual code in a specif…
• BTo verify that security certificates on target servers are valid.
• CTo compile source code into machine binary automatically.
• DTo test hardware interface speeds of peripheral connections.

In most modern programming languages (such as C, Java, Python), what is the standard index of the first element in an array?

• A0
• B1
• C-1
• DIndex number depends on array size dynamically

What is the purpose of declaring a value as a "constant" in software development?

• ATo assign a value to a identifier that cannot be modified during program execution.
• BTo force the operating system to load the variable into cache memory.
• CTo allow the variable value to change dynamically based on processor clock speed.
• DTo indicate that a variable is accessible only by web server applications.

How does a record data structure differ from an array?

• AA record can store elements of different data types under named fields, whereas an array…
• BA record can only be stored on magnetic tapes, whereas an array can only be stored in RAM.
• CA record is limited to exactly two elements, whereas an array has unlimited size.
• DA record is always compiled, whereas an array is always interpreted.

What is the defining characteristic of a Relational Database Management System (RDBMS)?

• AData is organized into tables (relations) consisting of rows and columns linked by common…
• BData is stored as a single, sequential text file on magnetic tape devices.
• CData is organized in a hierarchical tree structure with parent-child pointer links only.
• DData is stored exclusively in system RAM without ever writing to non-volatile disks.