Computer Science MCQs – Page 34 (Q331-340)

Trying to wait or using Task Manager/Force Quit to close the unresponsive program is correctly identified as the generally recommended first step when a computer freezes or hangs, since abruptly cutting power can risk data loss or file corruption that a controlled forced closure is less likely to cause. Waiting briefly can sometimes allow a temporarily overloaded system to catch up and resume normal responsiveness, particularly if it's processing a large task in the background. If waiting doesn't resolve the issue, using built-in tools like Task Manager on Windows or Force Quit on macOS allows users to specifically target and close only the unresponsive program, rather than restarting the entire system and losing unsaved work in other open applications. Only as a last resort, when these controlled methods fail, should a hard reset or power cycle be used, since it carries the greatest risk of data loss or file system corruption.

Ctrl+Alt+Delete is correctly commonly used on Windows for accessing options like Task Manager, Lock, or Sign Out, presenting a security screen that offers several system management choices rather than performing a single fixed action. This 'three-finger salute,' originally designed by IBM engineer David Bradley in the early 1980s, was deliberately chosen as an awkward key combination unlikely to be pressed accidentally, historically used to force a system restart on early PCs. In modern Windows versions, it instead opens an intermediate screen from which users can choose to lock the computer, switch users, sign out, open Task Manager, or access certain system settings. This shortcut remains one of the most iconic and widely recognized key combinations in computing history, closely associated with basic Windows troubleshooting and security practices.

Installing an antivirus program correctly helps protect against malicious software, or malware, which encompasses viruses, worms, trojans, ransomware, and spyware designed to damage systems, steal data, or otherwise compromise a computer's security. Antivirus software works by scanning files and monitoring system behavior for patterns matching known malware signatures or suspicious activity, then quarantining or removing detected threats before they can cause harm. While antivirus software is an essential layer of defense, it works best combined with other safe computing practices, such as keeping software updated, avoiding suspicious email attachments and links, and using strong, unique passwords. As malware techniques continue to evolve, modern antivirus solutions increasingly incorporate behavioral analysis and machine learning to detect new, previously unknown threats beyond simple signature matching.

Too many background programs, insufficient RAM, or malware are correctly identified as common causes of a computer running slowly over time, since each of these factors consumes valuable CPU processing power, memory, or storage resources that would otherwise be available for the tasks a user is actively trying to perform. Background programs that automatically launch at startup can silently accumulate over time as more software is installed, gradually degrading overall system performance without an obvious single cause. Malware is particularly concerning since it can consume significant system resources while operating covertly, sometimes without any other obvious symptoms besides sluggish performance. Regularly reviewing startup programs, ensuring adequate RAM for one's typical workload, and running periodic malware scans are all practical steps for maintaining a computer's performance over its lifespan.

The purpose of regularly updating an operating system is correctly to fix security vulnerabilities, bugs, and add new features, ensuring the system remains protected against newly discovered threats while also benefiting from ongoing improvements in performance, compatibility, and functionality. Security updates are especially critical, since cybercriminals actively search for and exploit unpatched vulnerabilities in outdated software, making regularly updated systems significantly less susceptible to many common attacks. Beyond security, updates often address bugs that could cause crashes or unexpected behavior, and they may introduce new features or improved hardware support that enhance the overall user experience. Most modern operating systems, including Windows and macOS, offer automatic update mechanisms specifically to encourage users to stay current without needing to manually check for and install updates themselves.

The 'blue screen of death' (BSOD) correctly refers to a critical system error screen in Windows, appearing when the operating system encounters a fatal error it cannot safely recover from, forcing an abrupt halt to prevent further damage or data corruption. Displayed as a blue background with white text, the BSOD typically includes error codes and technical information that can help diagnose the underlying cause, which might range from faulty hardware or drivers to corrupted system files. While alarming to encounter, a BSOD is a deliberate safety mechanism rather than random chaos, designed to stop the system before an unstable state causes worse problems. Persistent or repeated BSOD occurrences typically indicate an underlying hardware or driver issue that requires troubleshooting, such as updating drivers, checking for failing hardware, or running system diagnostic tools.

Device Manager in Windows is correctly used for viewing and managing hardware devices and their drivers, providing a centralized list of all recognized hardware components, from the display adapter and network card to keyboards and USB devices, along with their current status and driver information. It allows users to update, roll back, disable, or uninstall drivers for specific devices, which is particularly useful for troubleshooting hardware that isn't functioning correctly. Device Manager also flags problematic devices with warning icons, helping users quickly identify hardware that may need attention, such as a missing or outdated driver. This tool is an essential resource for diagnosing and resolving hardware-related issues without needing to use third-party diagnostic software.

A driver update is correctly meant to improve or fix how the operating system communicates with a specific hardware device, addressing bugs, improving performance, adding support for new features, or resolving compatibility issues that may arise with new software or OS updates. Manufacturers release driver updates periodically as they discover issues or as new operating system versions are released that may require adjusted communication protocols with existing hardware. Failing to keep drivers updated can result in hardware malfunctioning, underperforming, or in more serious cases, causing system instability or crashes. Modern operating systems often include mechanisms to automatically download and install driver updates, though manually checking manufacturer websites can sometimes provide access to newer or more specialized driver versions.

System Properties in Windows correctly shows information about the computer's hardware, operating system version, and basic settings, providing a quick reference for details like the installed processor, amount of RAM, Windows edition and version, and the computer's name on a network. This information is particularly useful for troubleshooting, verifying software compatibility requirements, or simply confirming basic specifications without needing to open more detailed diagnostic tools. System Properties also provides access to related settings, such as remote desktop configuration, system protection (restore points), and advanced performance options. Understanding how to quickly check these basic system details is a practical skill useful for both everyday troubleshooting and more technical support scenarios.

The benefit of creating regular data backups is correctly that it protects against data loss due to hardware failure, accidental deletion, or malware, ensuring that important files can be recovered even when the original source becomes damaged, corrupted, or otherwise inaccessible. Hardware components like hard drives can fail unexpectedly regardless of how carefully a computer is maintained, while accidental deletions and malware attacks like ransomware represent additional common threats to data integrity. Best practices for backups often include the '3-2-1 rule,' recommending three total copies of important data, stored on two different types of media, with at least one copy kept off-site or in the cloud. Establishing a consistent, automated backup routine is one of the most fundamental and cost-effective steps individuals and organizations can take to safeguard against potentially devastating data loss.