IT &computer MCQ section 6 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (b)

The kernel (also called nucleus) is a computer program that constitutes the central core of a computer’s operating system. It is the first program loaded on startup, and then manages the remainder of the startup, as well as input/output requests from software, translating them into data processing instructions for the central processing unit. Its failure is called crash.

Answer: (c)

Optical Mark Reader (OMR) is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked. It is specially used for checking the answer sheets of examinations having multiple choice questions.

Answer: (c)

The write-back method involves updating only the cache location and to mark it as updated with an associated flag bit, often called the dirty or modified bit. The main memory location of the word is updated later when the block containing this marked word is to be removed from the cache to make room for a new block.

The reason for the write-back method is that during the time a word resides in the cache, it may be updated several times.

Answer: (c)

Fourth Generation computers are modern-day computers. It began in 1971 when the Intel 4004 chip took the integrated circuit one step further by locating all the components of a computer (central processing unit, memory, and input and output controls) on a minuscule chip.

The microprocessor is the characteristic of fourth-generation computers, capable of performing all of the functions of a computer's central processing unit.

Answer: (d)

First-Come, First-Served (FCFS) Scheduling is the simplest CPU scheduling algorithm. It is like customers waiting in line at the bank or the post office or at a copying machine. Under it, the process that requests the CPU first is allocated the CPU first. However, the average waiting time under FCFS is long.