Computer Interview Questions and Answers

Answer - 21 : - Internet Protocol

Answer - 22 : - The Intel 4004, introduced in 1970, was the first processor introduced by Intel.

Answer - 23 : - 8

Answer - 24 : -  chmod

Answer - 25 : - This question can invoke quite a bit of debate, but my short answer is to put the computer to sleep each night or any time you leave the computer for more than 15 minutes. If you are not going to use the computer for more than a day (such as leaving it for the weekend), it is best to turn the computer off. Idle 15 minutes to 24 hours: Sleep Idle 24 hours or more: Shut Down When a computer is in "sleep" or "standby" mode, it consumes almost no energy, so the difference between letting it sleep overnight or turning it off during the night is negligible. However, if you have a laptop running off a battery charge, the difference may be noticeable. I have noticed that my laptop's battery life only lasts about five to six days in sleep mode, but will last for weeks if the computer is off. Therefore, if you are not going to be using your laptop for more than a few hours and do not have AC power available, it is best to turn the computer off. The most important way to save energy is to not leave the computer running normally when you are not using it. I have my computer set to automatically sleep if it is idle for 15 minutes and my screen dims after 5 minutes. This way, I know that I won't accidentally leave my computer running for a long period of time. I also put my computer to sleep manually if I know I am going to be taking a break for more than 15 minutes. Finally, if you put your computer to sleep every night and hardly ever turn if off, it may be good to at least restart the computer every few weeks. This may help improve performance in case some errant processes are consuming unnecessary RAM or CPU time.

Answer - 26 : - If your computer is not connected to the Internet, there is no way for information to be transmitted to or from the computer over the Internet. If you have a modem connected to a phone line and have your computer set to receive incoming calls, it is theoretically possible for someone to hack into it, but extremely unlikely. The only way for someone to hack into a computer not connected to the Internet or a phone line it is to physically use the computer. While manufacturers may include chips that uniquely identify your computer, they do not put in chips that transmit any kind of information about your system. Any personal information you have on your computer is stored on your hard drive and is safe as long as no one accesses it. Therefore, it is a good idea to require a password to log in to your computer. It is also wise to erase your hard drive and "zero all data" before selling or giving your computer to someone else.

Answer - 27 : - The NT in Windows NT stands for "New Technology." Windows NT was built with primarily the same interface as Windows 95, but included new technology such as preemptive multitasking and was the first 32-bit version of the Windows operating system. Some argue that because of the new networking options included with Windows NT, the abbreviation stands for "Networking Technology." However the official meaning of NT, according to Microsoft, is "New Technology." Windows NT was originally developed to be a a reliable and scalable operating system for businesses. However, the NT kernel later became the foundation of Windows 2000 and then Windows XP, which is available in both Home and Professional versions.

Answer - 28 : - The backslash key is located near the "Enter" or "Return" key on most keyboards. It is most often found directly to the left of the Enter key, but can also be placed below or above the enter key. The backslash key is located directly above the the Return key on Apple keyboards. It is important to differentiate between the backslash and the forward slash keys. The backslash key has a "pipe" character above it, which is a straight vertical line. The forward slash key has a question mark above it. Forward slashes are used to designate directories in URLs, i.e. http://www.exammaterial.com/compter/computer.aspx, while backslashes are used do designate Windows directories, like you may see in Windows Explorer, i.e. C:\Program Files\. Backslash: \ Forward slash: /

Answer - 29 : - These two terms are often used synonymously, and while their meanings are slightly subjective, I would argue they are distinctly different. Technical obsolescence is when a product is no longer technically superior to other similar products. For example, you may buy the latest iPod, which has the most storage and largest screen of any iPod available. A week later, Apple may introduce a new iPod model that has twice the storage, a larger screen, and makes coffee for you in the morning. The new iPod is technically superior than the model you purchased, which means the iPod you bought a week earlier is "technically obsolete." But that does not mean your iPod is functionally obsolete. It still plays music and can download new songs from your computer using iTunes. Functional obsolescence is when a product no longer functions like it did when you bought it. Using the iPod example again, if Apple released a new version of iTunes that only worked with the new iPod, your iPod would be limited in its capability to download and play new music. This would make your iPod "functionally obsolete." Fortunately, companies like to maintain their consumer base. This means they have a strong incentive to support products for several years after their release. In summary, a product may become technically obsolete well before it becomes functionally obsolete. When you buy any type of computer or electronic product, you have to expect that it will soon become technically obsolete. But that should not cause you undue distress. If your iPod still plays all the songs you like and the buttons keep working the way you are used to, who cares if there is a new model out with a bigger screen and a bigger hard drive? It is to your benefit to be content with the product you have instead of always comparing it to the newest model.

Answer - 30 : - Bits and Bytes both measure amounts of data. However, they are typically used in two different contexts. Bits, kilobits (Kbps), and megabits (Mbps) are most often used to measure data transfer speeds. This may refer to how fast you are downloading a file, or how fast your Internet connection is. For example, if you are downloading a file on cable modem, your download speed might be 240Kbps. This is much faster than a dial-up modem, which maxes out at 56Kbps. Bytes, on the other hand, are used to measure data storage. For example, a CD holds 700MB (megabytes) of data and a hard drive may hold 250GB (gigabytes). The other important difference is that bytes contain eight bits of data. Therefore, a 240Kbps download is only transferring 30KB of data per second. However, kilobytes per second is not as commonly used as kilobits per second for measuring data transfer speeds. After all, using kilobits per second (Kbps) makes your connection sound eight times faster! It is important to know that bytes are abbreviated with a capital B, where as bits use a lowercase b. Therefore, Mbps is megabits per second, and MBps is megabytes per second. So 8Mbps is equal to 1MBps.