JAMB Computer Studies 2024
Questions & Answers

Cloud storage enables remote data access over the internet, offering flexibility and convenience, unlike local storage which is confined to a device.

Octal 14 = 1×8 + 4 = 12 in decimal. Convert 12 to binary: 12 ÷ 2 = 6 remainder 0, 6 ÷ 2 = 3 remainder 0, 3 ÷ 2 = 1 remainder 1, 1 ÷ 2 = 0 remainder 1, so 1100.

Spreadsheet applications like Excel perform data analysis using formulas, charts, and pivot tables, unlike text editing or debugging tools.

A constant is a fixed value (e.g., PI = 3.14159) that cannot change during program execution, unlike variables or control structures.

A hybrid computer integrates analog (continuous data) and digital (discrete data) processing, used in applications like medical imaging.

HTTP (HyperText Transfer Protocol) governs the transfer of webpages between clients and servers on the internet.

Fifth-generation computers emphasize artificial intelligence and parallel processing, unlike earlier generations using vacuum tubes or transistors.

A runtime error (e.g., division by zero) occurs during program execution, unlike syntax errors caught during compilation.

Ethernet cables (e.g., Cat5e) are used for wired network connections, unlike USB (peripherals), HDMI (video/audio), or VGA (display).

Binary 10000 = 1×2⁴ = 16 in decimal. Convert 16 to hexadecimal: 16 ÷ 16 = 1 remainder 0, so 10.

Unix supports multiple simultaneous users, making it a multi-user OS, unlike MS-DOS or Windows XP, which are primarily single-user.

Software updates address bugs, enhance security, and introduce new features to improve system functionality.

VGA (Video Graphics Array) is a connector for displays, unlike RAM, CPU, or SSD, which are internal components or storage.

A gateway connects networks with different protocols (e.g., LAN to WAN), facilitating communication across diverse systems.

Cache memory is high-speed, volatile memory used to store frequently accessed data for quick CPU access, not for large or permanent storage.

UDP (User Datagram Protocol) is a connectionless protocol for fast data transmission, used in applications like video streaming.

A range check ensures data falls within acceptable limits (e.g., age between 1 and 100), enhancing data integrity.

Convert to decimal: 1100 = 12, 101 = 5. Subtract: 12 - 5 = 7. Convert 7 to binary: 7 ÷ 2 = 3 remainder 1, 3 ÷ 2 = 1 remainder 1, 1 ÷ 2 = 0 remainder 1, so 0111.

A while loop repeats code while a condition is true, unlike if statements (conditional), function calls, or declarations.

A password verifies user identity to secure access to systems or data, preventing unauthorized use.

Unit testing verifies individual software components for correctness, unlike routing, encryption, or compression.

Hexadecimal 2F = (2×16¹) + (15×16⁰) = 32 + 15 = 47 in decimal (F = 15).

Workstations feature high-performance hardware for tasks like graphic design or simulations, unlike low-power or single-task systems.

An array stores multiple values of the same type under one variable name, enabling efficient data management.

Ethernet is a wired networking standard for LANs, unlike wireless standards like Bluetooth, Wi-Fi, or NFC.

A candidate key is a set of attributes that can uniquely identify records in a table, eligible to become a primary key.

Software piracy involves unauthorized copying or distribution of software, violating licensing agreements.

Binary 10100 = 16 + 4 = 20 in decimal. Convert 20 to octal: 20 ÷ 8 = 2 remainder 4, so 24.

MongoDB is a non-relational (NoSQL) database using flexible JSON-like documents, unlike relational databases like MySQL.

A default gateway routes traffic from a local network to external networks, typically via a router.

Graphic design software like Photoshop enables image manipulation for creating or editing visuals.

Convert 13 to binary: 13 ÷ 2 = 6 remainder 1, 6 ÷ 2 = 3 remainder 0, 3 ÷ 2 = 1 remainder 1, 1 ÷ 2 = 0 remainder 1, so 1101.

A differential backup saves changes since the last full backup, reducing backup time compared to full backups.

A library provides reusable code (e.g., functions or classes) to simplify development, like Python’s math library.

MAN (Metropolitan Area Network) connects devices over a city or campus, unlike SQL, HTML, or CSS, which are not networks.

Convert 30 to hexadecimal: 30 ÷ 16 = 1 remainder 14 (E in hex), so 1E.

Embedded computers perform specific functions within devices (e.g., in cars or appliances), with limited general-purpose use.

A cookie stores user preferences or session data (e.g., login details) to enhance browsing experience.

DRAM (Dynamic Random Access Memory) is volatile, losing data without power, unlike non-volatile ROM, Flash, or SSD.

A pivot table summarizes and analyzes large datasets in spreadsheets, enabling insights through grouping and aggregation.