Firmware Interview Questions are normally technical, but there are other aspects that need to be focused on.
It is not just about the technical side of things. The candidate should be able to answer questions related to their work ethic and motivation as well. They should also be able to talk about how they work in a team and what kind of environment they would enjoy working in most.
1. What is Firmware?
Ans. Firmware is a software that is written for the hardware. It can also be thought of as the operating system for electronics. Firmware is an important part of the hardware and should be updated regularly to keep up with new features and improvements.
Firmware provides an interface between the hardware and software where they are both able to communicate with each other. Firmware can make changes to a device’s hardware so it will work better with its firmware or other components.
2. What are the different types of Firmware?
Ans. Firmware is the software that controls how a computer operates. There are many different types of firmware, each with specific functions.
The first kind of firmware is BIOS. This type of firmware is the first set of instructions that a computer reads from the hard drive when it boots up and tells the machine where to find other sets of instructions on which to operate.
BIOS needs to be updated regularly in order for it to work properly with new hardware technologies, such as newer storage devices or graphics cards. The second type of firmware is called Unified Extensible Firmware Interface (UEFI). This type of firmware provides some protection against malware attacks and can update itself without needing external software or hardware assistance.
3. What is firmware testing?
Ans. Before a firmware is released, there are many different types of testing it has to go through. This includes but is not limited to: security, usability, and compatibility.
The first type of testing that the firmware goes through is security. This tests the system and makes sure that it meets all the necessary security standards. Next, the firmware will undergo usability testing to make sure that it is simple for users to understand how to use. The last type of testing that takes place is compatibility with other devices and software for the customer’s convenience.
4. Differentiate between Firmware and Software.
Ans. A distinction is often made between “software,” which are computer programs, and “firmware,” which are specialized computer programs.
Firmware vs. Software:
Software is primarily written in human-readable code such as Java or Python. Firmware can be written in any language, but it is usually a low-level language such as C or Assembly.
The main difference between firmware and software is that firmware resides on a hardware device while software can reside anywhere including hardware devices, servers, and desktops.
5. What is flashing firmware?
Ans. Flashing firmware is the process of updating or replacing the firmware of a device.
Firmware is usually written to update and change the features and functionalities of a device. It does not change any hardware features, but it does provide a way for you to customize software features. For example, you can upgrade your phone’s firmware to support new features like NFC or Wi-Fi.
This process applies to all electronics that require an operating system like phones, tablets, laptops, smart TVs etc.
6. Can you delete firmware?
Ans. It is very difficult to delete firmware because it is difficult to find the files. Manufacturers usually lock it so that you cannot access it.
Pros of deleting firmware:
-Improved performance of device
-Smoother operation of device
-More space for the user
-No more bugs and glitches
Cons of deleting firmware:
-Removing protections against malware and viruses
7. What is Middleware Testing?
Ans. Middleware testing is the process of checking for faults in software that connects two different applications.
Middleware can be defined as any intermediary or interface between two computer programs. It includes API’s, software libraries, embedded systems and interpreters.
The testing process of middleware involves three phases: analysis, design and implementation.
8. What is a Bootloader?
Ans. A bootloader is a small program that loads and starts another program, such as an operating system or computer firmware.
For examples, the BIOS on PCs are usually programmed as bootloaders.
Bootloaders are also used by developers to provide a user interface that the end-user can interact with (to launch an operating system).
9. What is Coreboot?
Ans. A coreboot is a form of firmware designed to replace an older BIOS. Coreboot has been designed to minimize the amount of code running at boot time, reducing the attack surface an intruder might have in trying to break into your system.
The idea behind Coreboot is that you can do more with less. The less there is, in fact, the better protected you are against malicious attacks.
10. What is Microcode?
Ans. A microcode is a small program that can be embedded into a chip. Microcodes are usually used to control machine operations such as timing and control the address and data buses of the CPU, but they can also be used for many other purposes.
11. What is firmware hacking?
Ans. Firmware hacking is the process of altering the firmware of a device to change its functionality.
For example, in order to add new features or change the way that a system works, firmware hackers might alter the code that runs on a computer’s BIOS chip.
12. What is Flash Memory?
Ans. Flash memory is a type of non-volatile storage media which can be electrically erased, usually from ROM. This means that the data on a flash drive cannot be overwritten or corrupted by any outside force.
13. What are firmware development tools?
Ans. Firmware development tools are software programs that make the process of creating firmware quicker and easier. They can be as simple as a piece of code to complex computer programming languages. It is up to the user to decide which one they want to use, but there are some advantages and disadvantages for each.
Usually, when you create a new product, you will need firmware in order to control it. These usually have two main components: an outer shell and an inner core. The outer shell controls the hardware while the inner core controls the software components inside it.
14. What is a firmware update?
Ans. Firmware updates are essentially best practices for the safe and secure running of devices and systems. The firmware update should be applied as soon as possible after it is released, in order to ensure that you are not left vulnerable to security breaches.