Important MCQ questions for Class 11 Computer Science Chapter-Computer Overview
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MCQ Questions set-1 for chapter-Computer Overview class 11 Computer Science
Computer - MCQ on Computer Overview
Class XI
Q. 1. The operating system which allows two or more users to run programs at the same time, is
a. multiprocessing.
b. multi-user.
c. multi-tasking.
d. real time.
Answer:
(b)
Explanation: Multi-user is a term that defines an operating system or application software that allows concurrent access by multiple users of a computer.
Q. 2. The operating system which supports running a program on more than one CPU, is
a. muti-processing OS.
b. multi-user OS.
c. multi-tasking OS.
d. real time OS.
Answer:
(a)
Explanation: An operating system capable of supporting and utilizing more than one computer processor is known as multi-processing operating system. For example: Linux, Unix, Windows 2000.
Q. 3. The operating system that allows more than one program to run concurrently, is
a. muti-processing OS.
b. multi-user OS.
c. multi-tasking OS.
d. real time OS.
Answer:
(c)
Explanation: An operating system that is capable of allowing multiple software processes to run at the same time is known as multitasking system. For example: Unix, Windows 2000.
Q. 4. The operating system that allows different parts of a single program to run concurrently, is known as
a. muti-processing OS.
b. multi-user OS.
c. multi-tasking OS.
d. multithreading OS.
Answer:
(d)
Explanation: Operating systems that allow different parts of a software program to run concurrently is known as multithreading system. For example: Linux, Unix.
Q. 5. The operating system that responds to input instantly, is known as
a. muti-processing OS.
b. real time OS.
c. multi-tasking OS.
d. multithreading OS.
Answer:
(b)
Explanation: A Real-Time Operating System (RTOS) is a multitasking operating system intended for real-time applications. Such applications include embedded systems, industrial robots, spacecraft, industrial control (see SCADA), and scientific research equipment.
Q. 6. A Compiler is
a. a combination of computer hardware.
b. a program which translates from one high-level language to another.
c. a program which translates from one high-level to a machine level.
d. a program which translates from one machine level to another machine level.
Answer:
(c)
Explanation: A compiler is a computer program (or set of programs) that transforms source code written in a computer language (the source language) into another computer language (the target language, often having a binary form known as object code).
Q. 7. When a key is pressed on the keyboard, the standard which is used for converting the keystroke into the corresponding bits, is
a. ANSI.
b. ASCII.
c. EBCDIC.
d. ISO.
Answer:
(a)
Explanation: An organization that identifies industrial and public requirements for national census standards and coordinates and manages their development, resolves national standards problems, and ensures effective participation in international standardization.
Q. 8. A Pixel is
a. a computer program that draws picture.
b. a picture stored in secondary memory.
c. the smallest resolvable part of a picture.
d. a picture stored in primary memory.
Answer:
(c)
Explanation: A pixel is the smallest discrete component of an image or picture on a CRT screen (usually a colored dot).
Q. 9. The device that is used as the standard pointing device in a Graphical User Environment, is
a. keyboard.
b. mouse.
c. joystick.
d. track ball.
Answer:
(b)
Explanation: In computing, a mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface. The mouse's motion typically translates into the motion of a pointer on a display, which allows for fine control of a Graphical User Interface.
Q. 10. The number system that is usually followed in a typical 32-bit computer, is
a. 2.
b. 10.
c. 16.
d. 32.
Answer:
(a)
Explanation: The binary numeral system, or base-2 number system represents numeric values using two symbols; usually 0 and 1.This number system is followed in 32-bit computer.
Q. 11. The device in which we can add information to it but cannot erase or modify it, is
a. floppy disk.
b. hard disk.
c. tape drive.
d. CDROM.
Answer:
(d)
Explanation: CD-ROM is a pre-pressed compact disc that contains data accessible to, but not writable by, a computer.
Q. 12. The technology that is used in a compact disks is
a. mechanical.
b. electrical.
c. electro magnetic.
d. laser.
Answer:
(d)
Explanation: A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for Light Amplification By Stimulated Emission Of Radiation. This technology is used in compact disks.
Q. 13. The storage device that can store maximum amount of data, is
a. floppy disk
b. hard disk
c. compact disk
d. magneto optic disk
Answer:
(b)
Explanation: A hard disk drive is a non-volatile storage device, which stores digitally encoded data on rapidly rotating platters with magnetic surfaces. It stores the maximum amount of data.
Q. 14. The largest manufacturer of hard disk drives is
a. IBM.
b. Seagate.
c. Microsoft.
d. Magnetic Optical Disk.
Answer:
(b)
Explanation: Seagate technology is the largest manufacturer of Hard Disk Drives.
Q. 15. The memory location address are limited from
a. 00000 to 9ffff(16).
b. 00001 to 9ffff(16).
c. 00010 to 9ffff(16).
d. 10000 to 9ffff(16).
Answer:
(a)
Explanation: In computer science, a memory address is an identifier for a memory location, at which a computer program or a hardware device can store data and later retrieve it. The memory location address is limited from 00000 to 9ffff(16).
MCQ Questions set-2 for chapter-Computer Overview class 11 Computer Science
Q. 16. The ability to recover and read deleted or damaged files from a criminal’s computer is an example of a law enforcement specialty called
a. robotics.
b. simulation.
c. computer forensics.
d. animation.
Answer:
(c)
Explanation: Computer forensics is a branch of forensic science pertaining to legal evidence found in computers and digital storage mediums. Computer forensics is also known as digital forensics.
Q. 17. The study of molecules and structures whose size ranges from 1 to 100 nanometers, is known as
a. Nanoscience.
b. Microelectrodes.
c. Computer forensics.
d. Artificial intelligence.
Answer:
(a)
Explanation: Nanoscience and nanotechnology involve studying and working with matter on an ultra-small scale. One nanometre is one-millionth of a millimetre and a single human hair is around 80,000 nanometres in width.
Q. 18. Computers gather data, which means that they allow users to
a. present data.
b. input data.
c. output data.
d. store data.
Answer:
(b)
Explanation: The users feed the data into the system through input devices. For example-keyboard, mouse, joystick, etc.
Q. 19. After a picture has been taken with a digital camera and processed appropriately, the actual print of the picture is considered
a. data.
b. output.
c. input.
d. the process.
Answer:
(b)
Explanation: Output from computer processing, the work that has been completed, may take the form of a printed document, magnetic tape, or magnetic disk or diskette.
Q. 20. Surgeons can perform delicate operations by manipulating devices through computers instead of manually. This technology is known as
a. robotics.
b. computer forensics.
c. simulation.
d. forecasting.
Answer:
(a)
Explanation:
Robotics is the science and technology of robots, and their design, manufacture, and application. Robotics has connections to electronics, mechanics, and software.