Hardware vs. Software basics.

Correct answer: A. Compatibility rules between binary program and system

Application binary interface relates to low level matching of program and system. For exams do not treat it as a normal user screen.

Correct answer: A. To provide services needed to run a program

A runtime environment supports a program during execution. For exams understand it as software environment not hardware.

Correct answer: A. Other software component needed for a program to run

If dependency is missing a program may have trouble running. For exams use library and runtime as examples.

Correct answer: A. To help data safety by keeping a record of changes

Journaling can help repair file system after sudden shutdown. For exams connect it with relation between storage and software structure.

Correct answer: A. To attach storage or file system to the system for use

After mounting the operating system can access files. For exams do not understand mount only as physical fixing.

Correct answer: A. To prevent loss from incomplete data writing

Safe removal lets the system finish pending file operations. For exams remember the role of unmount in removing a pen drive.

Correct answer: A. Combined use of multiple storage disks

RAID can use multiple disks for performance or data safety. For exams treat it as a storage concept.

Correct answer: A. Software RAID can run through system software and hardware RAID through a separate controller

Both may aim at storage management but the method differs. For exams identify the form even when the function is similar.

Correct answer: A. Graphics processing unit is hardware and graphics driver is software

Graphics processing unit performs visual work and driver runs it with the system. For exams separate device and control software.

Correct answer: A. Software uses special hardware to speed up a task

Hardware acceleration can help in tasks like video or graphics. For exams connect it with performance improvement.

Correct answer: A. Network stack is software layers and network card is hardware

Network card is hardware for sending data while network stack handles rules. For exams separate hardware and protocol layers.

Correct answer: A. IP can relate to network configuration and MAC to interface identity

IP address can change while MAC address is considered more directly tied to network interface. For exams identify both addresses separately.

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

Both can provide security but their form differs. For exams distinguish hardware and software even when function is similar.

Correct answer: A. Hardware based security

Trusted Platform Module can be hardware related to security keys and trust. For exams identify it as an example of security hardware.

Correct answer: A. Sensor is hardware and template is stored data

Sensor captures sample and template is data stored for matching. For exams separate device and data.

Correct answer: A. It is digital information used in data security

Direct answer: Option A is correct. An encryption key is digital information used by an encryption method to protect data. Encryption changes readable data into an unreadable form, and the key helps an authorised person or system encrypt or decrypt it. The word “key” is being used as a computing concept, not as a button that a finger presses. Option A works because it correctly describes a secret or controlled digital value used in data security. Option B is wrong because a plastic keyboard button is a physical hardware object, while an encryption key is not always physical and is usually represented as bits or characters. Option C is wrong because a printer roller moves paper and has no necessary connection with encryption. Option D is wrong because a monitor cable carries display signals and is also hardware, not security information. Memory cue: encryption key means “security code,” not “keyboard key.”

Correct answer: A. To reduce risk by running a program in a limited environment

A sandbox can keep software within controlled limits. For exams connect it with security and isolation.

Correct answer: A. Host hardware and hypervisor

A virtual machine is created by software but resources come from real hardware. For exams keep virtual and real separate.

Correct answer: A. It provides isolation at software level

A container is a software isolation method for running applications. For exams do not treat it as a physical object by name.

Correct answer: A. To run virtual machines and allocate resources

A hypervisor can allocate real hardware resources to virtual machines. For exams understand it as advanced system software.

Correct answer: A. Check form location control role and dependency together

Names can confuse in hard questions. For exams separate device program data service and setting.

Correct answer: A. Hardware resources kernel control driver communication application task

Many levels work together in a computer. For exams understanding layers from hardware to application is very useful.

Correct answer: A. Like low level control instructions inside the processor

Microcode is related to very internal control of the processor. For exams understand it as different from normal application software.

Correct answer: A. To help virtual machines run better and more securely

Hardware virtualization support can help a hypervisor allocate real resources better. For exams remember the relation between virtual machines and processor features.

Correct answer: A. Both can affect low level control behavior

Both can be related to deeper system levels than normal app updates. For exams connect such updates with care and control level.