Hardware vs. Software basics.

Correct answer: A. A software printer that can create file output

A virtual printer can output to a file instead of real paper. For exams think of the word virtual as related to software.

Correct answer: A. Virtual drive is created by software and real drive is a physical device

A virtual drive may appear like a drive in the system but is not a separate physical device. For exams separate virtual and real.

Correct answer: A. It can create an environment like another system using software

An emulator can imitate another hardware or system through software. For exams do not treat it as real hardware.

Correct answer: A. Operating system running inside a virtual machine

Guest operating system runs inside a virtual environment rather than directly on real hardware. For exams understand host and guest difference.

Correct answer: A. The real computer that runs virtual systems

The direct answer is A, the real computer that runs virtual systems. A host machine is the physical computer whose processor, memory, storage and other resources support a virtual machine or virtual system. The virtual system is called the guest; it operates inside software on the host and may appear like a separate computer. Thus option A is correct: it clearly describes the real hardware provider. Option B, printer paper, is only a consumable material and cannot run a system. Option C, browser history, is saved information about visited pages, not a machine. Option D, a mouse pad, is only a surface for using a mouse. The host can run ordinary programs as well as virtualization software, while the guest uses resources assigned by the host. Memory trick: host hosts; guest is hosted. Do not confuse the physical host with the virtual guest.

Correct answer: A. Container is lightweight software isolation and virtual machine can be a full virtual system

Both are software based environments but their resource use and isolation differ. For exams do not treat them as physical hardware.

Correct answer: A. To reduce security risks by running a program in a restricted and controlled environment

Sandboxing runs a program or potentially unsafe code in an isolated, restricted, and controlled environment. This limits its access to the main system’s files, settings, and resources, thereby reducing security risks, so option A is correct. The other options describe unrelated and impractical hardware actions. Exam tip: associate sandboxing with software isolation and security.

Correct answer: A. Control over app use of hardware and data

Permission model decides whether an app can access camera microphone or files. For exams treat it as software security control.

Correct answer: A. App may not get correct data from location hardware or service

Location permission is software control that can block access to location data. For exams understand permission and hardware service relation.

Correct answer: A. Fingerprint sensor and authentication software

Fingerprint sensor takes data and software matches identity. For exams remember both roles in a biometric system.

Correct answer: A. Sensor is hardware and fingerprint sample is data

Biometric sensor is a physical device and captured sample is data. For exams distinguish device and information.

Correct answer: A. Digital information used to secure data

An encryption key is a value used by an encryption algorithm to transform readable plaintext into protected ciphertext, or to help reverse that transformation during decryption. Depending on the system, the key may be a sequence of bits, characters, or other digital data; it is not a physical object. A secure key should be protected from unauthorized disclosure, because possession of the appropriate key may allow decryption. The word “key” is metaphorical here and should not be confused with a keyboard key. A monitor screw, printer tray, and plastic keycap are physical hardware parts, so option A is correct.

Correct answer: A. Hardware firewall can be a separate device and software firewall is a program

Both can provide security but their form is different. For exams classify by form even when function is similar.

Correct answer: A. Software based identity and permission management

User account can control access and permission. For exams treat it as a software security system.

Correct answer: A. To indicate file type or related software

File extension helps the system know which app can open a file. For exams remember the file and program relation.

Correct answer: A. File may open in the wrong app

File association is a software setting that connects file and app. For exams do not treat it as a hardware fault.

Correct answer: A. In app crash one program may close and in system crash whole system may be affected

App and system crash differ in scope of effect. For exams identify at which level the problem is occurring.

Correct answer: A. Driver hardware or system software issue

A serious system error can occur at many levels. For exams do not assume only one cause in such cases.

Correct answer: A. It gives a record of software events and errors

Log files can show when and what error occurred. For exams remember the role of records in diagnosis.

Correct answer: A. Sensor gives temperature data and software displays it

Hardware sensor measures and software can show the report. For exams understand measurement and presentation separately.

Correct answer: A. Operating system can turn off screen after inactivity

Operating system can control hardware behavior to save energy. For exams treat power settings as software control.

Correct answer: A. Software sets low power state and hardware works accordingly

In sleep mode the system controls resources to save power. For exams treat it as combined work of operating system and hardware.

Correct answer: A. Update can be a fix and upgrade can be a major version or component change

A software update can be a small fix and hardware upgrade can install a new component. For exams check the context of the terms.

Correct answer: A. Check form function location control and dependency of the item

In hard questions many terms can look similar. For exams systematic checking reduces wrong classification.

Correct answer: A. To hide hardware details and give software a common interface

A hardware abstraction layer helps software communicate with different devices easily. For exams treat it as a middle layer between hardware and system software.