Wednesday, June 8, 2016

कम्प्युटर अपरेटर तथा सहायक कम्प्युटर अपरेटर पदकाे लागी २० अाेटा सम्भावित प्रश्न तथा उत्तरहरू 
1. Which of the following devices can be sued to directly image printed text?
a. OCR
b. OMR
c. MICR
d. All of above

2. The output quality of a printer is measured by
a. Dot per inch
b. Dot per sq. inch
c. Dots printed per unit time
d. All of above


3. In analog computer
a. Input is first converted to digital form
b. Input is never converted to digital form
c. Output is displayed in digital form
d. All of above

4. In latest generation computers, the instructions are executed
a. Parallel only
b. Sequentially only
c. Both sequentially and parallel
d. All of above

5. Who designed the first electronics computer – ENIAC?
a. Von-Neumann
b. Joseph M. Jacquard
c. J. Presper Eckert and John W Mauchly
d. All of above
6. Who invented the high level language c?
a. Dennis M. Ritchie
b. Niklaus Writh
c. Seymour Papert
d. Donald Kunth

7. Personnel who design, program, operate and maintain computer equipment refers to
a. Console-operator
b. Programmer
c. Peopleware
d. System Analyst

8. When did arch rivals IBM and Apple Computers Inc. decide to join hands?
a. 1978
b. 1984
c. 1990
d. 1991

9. Human beings are referred to as Homosapinens, which device is called Sillico Sapiens?
a. Monitor
b. Hardware
c. Robot
d. Computer
10. An error in software or hardware is called a bug. What is the alternative computer jargon for it?
a. Leech
b. Squid
c. Slug
d. Glitch

11. Modern Computer are very reliable but they are not
a. Fast
b. Powerful
c. Infallible
d. Cheap

12. What is the name of the display feature that highlights are of the screen which requires operator attention?
a. Pixel
b. Reverse video
c. Touch screen
d. Cursor

13. IMB launched its first personal computer called IBM-PC in 1981. It had chips from Intel, disk drives from Tandon, operating system from Microsoft, the printer from Epson and the application software from everywhere. Can you name the country which contributed the video display?
a. India
b. China
c. Germany
d. Taiwan

14. Personal computers use a number of chips mounted on a main circuit board. What is the common name for such boards?
a. Daughter board
b. Motherboard
c. Father board
d. Breadboard
15. In most IBM PCs, the CPU, the device drives, memory expansion slots and active components are mounted on a single board. What is the name of this board?
a. Motherboard
b. Breadboard
c. Daughter board
d. Grandmother board

16. What is meant by a dedicated computer?
a. Which is used by one person only
b. Which is assigned one and only one task
c. Which uses one kind of software
d. Which is meant for application software

17. The system unit of a personal computer typically contains all of the following except:
a. Microprocessor
b. Disk controller
c. Serial interface
d. Modem

18. A computer program that converts an entire program into machine language is called a/an
a. Interpreter
b. Simulator
c. Compiler
d. Commander

19. A computer program that translates one program instructions at a time into machine language is called a/an
a. Interpreter
b. CPU
c. Compiler
d. Simulator

20. A small or intelligent device is so called because it contains within it a
a. Computer
b. Microcomputer
c. Programmable
d. Sensor


Answers:

1. Which of the following devices can be sued to directly image printed text?
a. OCR
Explanation: Though, these days, we can find scanners that can do all of these tasks, OCR,  OMR and MICR are the different kinds of scanners based on their special capabilities. OCR are good at recognizing characters in scanned images, OMR are good to find marks made in specific location and MICR can precisely verify the signatures in scanned image by comparing it with the pre-stored samples. So, looking at the options, OCR better suits as correct answer. 

2. The output quality of a printer is measured by
b. Dot per sq. inch
Explanation: Dot per inch is the linear measurement - how many dots are used to print one inch of straight line. Dot per square inch is two dimensional measurement that takes care of printer's capability to print horizontal as well as vertical lines. Dots printed per unit time has nothing to do with the quality, it better relates to the speed of printing. Because third option is not valid, the all of above option too is not correct anymore. Now in between these two options, most of the books andwebsites offer 'dots per square inch' as the measurement of output quality. Because earlier printers had different  number of dots used to print horizontally and vertically, we had to take note of dots per square inch. Modern printers  have almost same resolution for vertical lines as well as horizontal lines. So dots per square inch is somewhat obsolete.  Now dots per inch (dpi) is enough to express printer quality. However, to be safe when both these two options are avialable, I choose 'dots per square inch' as correct answer (because the person who set question may take reference from those popular books or websites)

3. In analog computer
b. Input is never converted to digital form
Explanation: Analog computers can accept real physical values such as speed, pressure, temperature etc as input and process them. They do not need to convert the input into digital form. It is only hybrid computers that accept input in analog and convert them into digital form to process. So first option is cancelled out. Input is never converted to digital form is pretty okay for analog computers.  Output is displayed in digital form is quite unrelated to the question. Because the first option is already invalid, all of above option is no more suitable. So, Option B appears to be best suitable.

4. In latest generation computers, the instructions are executed
c. Both sequentially and parallel
Explanation: In older computers, because the memory and storage devices were sequential, computers were compelled to use sequential only. But later on the newer methods in operating systems and direct access devices for memory and storage made it possible to process multiple instructions parallel. However, there are some data that are sequentially by nature such as audio, video etc which require sequential processing. So, in my opinion, option C, both sequentially and parallel is correct option.

5. Who designed the first electronics computer – ENIAC?
c.  J. Presper Eckert and John W Mauchly
Explanation: John von Neumann introduced the Stored Program Concept which was fully used EDSAC. Joseph Marry Jacquard invented punched cards to automated his weaving loom. Joseph Presper Eckert and John William Mauchly had designed ENIAC which is considered as the first general purpose electronic computer. So, option C. is correct answer.

6. Who invented the high level language c?
a. Dennis M. Ritchie
Explanation: Dennis M. Ritche invented the programming language called C. It is also important to remember that the C++ programming languages, an extension of C, that was developed by Bjarne Stroustrup in the early 1980s at Bell Laboratories. Niklaus Writh is wellknown for his programming language Pascal and Modula. Seymour Papert is one of the pioneers of artificial intelligence, as well as an inventor of the Logo programming language. Donald Knuth is the father of analysis of algorithms. So, the option A is correct answer for this question.

7. Personnel who design, program, operate and maintain computer equipment refers to
c. Peopleware
Explanation: Personnel who design software systems are system analysts, who programs are programmer, who operates are console-operators, who maintains are support personnel  A term that collectively refer to these people is peopleware. Peopleware are the human involved in computer systems. So, option C is the correct answer.

8. When did arch rivals IBM and Apple Computers Inc. decide to join hands?
d. 1991
Explanation: The AIM alliance (Apple, IBM & Motorola) was an alliance formed on October 2, 1991, between Apple Inc. (then Apple Computer), IBM, and Motorola to create a new computing standard based on the PowerPC architecture. The stated goal of the alliance was to challenge the dominant Wintel computing platform with a new computer design and a next-generation operating system. It was thought that the CISC processors from Intel were an evolutionary dead-end in microprocessor design, and that since RISC was the future, the next few years were a period of great opportunity. So, I believe it was in 1991!

9. Human beings are referred to as Homosapinens, which device is called Sillico Sapiens?
d. Computer
Explanation: Obviously Computers! Because the role of silica in computers - they are used to create microprocessors, ROM chips, RAM chips which made possible of today's computers, they are often called sillico sapiens!

10. An error in software or hardware is called a bug. What is the alternative computer jargon for it?
d. Glitch
Explanation: Glitch is another term to mean the error or problem in hardware or software. Leech, Squid and Slug has nothing to do in this context.

11. Modern Computer are very reliable but they are not
c. Infallible
Explanation: Throughout the development of computers they improved. They became faster, more powerful and cheaper. Modern computers are really cheaper in spite of their improved speed and power. However, they are not infallible. They are extremely reliable.

12. What is the name of the display feature that highlights area of the screen which requires operator attention?
b. Reverse video
Explanation: Reverse video (or invert video or inverse video or 'reverse screen') is a computer display technique where the background and text color are inverted to highlight. So, reverse video is correct answer.

13. IMB launched its first personal computer called IBM-PC in 1981. It had chips from Intel, disk drives from Tandon, operating system from Microsoft, the printer from Epson and the application software from everywhere. Can you name the country which contributed the video display?
d. Taiwan
Explanation: Please provide reference if you know any

14. Personal computers use a number of chips mounted on a main circuit board. What is the common name for such boards?
b. Motherboard
Explanation: Daughterboard are the expansion cards inserted in expansion slots in motherboard. Modems, sound cards, display adapters etc are some examples of daughterboards. There is no boards known as fatherboards and breadboards. Motherboard is the main circuit board on which a number of chips are mounted. So, Motherboard is correct answer.

15. In most IBM PCs, the CPU, the device drives, memory expansion slots and active components are mounted on a single board. What is the name of this board?
a. Motherboard
Explanation: Similar to explanation for Q. No. 14.

16. What is meant by a dedicated computer?
b. Which is assigned one and only one task
Explanation: A computer used by one person only is personal computer. A computer assigned for only one task is dedicated computer. For example, dedicated web server, dedicated print server etc. A computer that uses only one kind of software is embedded device (computer). All computers are meant for application software. So, in my opinion, option B is correct answer.

17. The system unit of a personal computer typically contains all of the following except:
d. Modem
Explanation: System unit refers to the CPU box. It contains a motherboard and CPU, disk controllers, different kind of interfaces are mounted in it. From among the given options, modem comes as separate device (whether internal or external modem). So, system unit do not contain modem.

18. A computer program that converts an entire program into machine language is called a/an
c. Compiler
Explanation: Interpreter translates each statement of high level program into machine code in turn and executes. Simulator creates real world situation so that the different experiments are possible. Computer games uses simulation extensively. Compiler translates high level program into machine codes all at once and creates an executable file. I don't think commander is related to the question in any respect. Thus, option C is correct answer.

19. A computer program that translates one program instructions at a time into machine language is called a/an
a. Interpreter
Explanation: The language processor that translate each instruction of high level program into machine instructions is Interpreter. Other explanation is similar to Q. 18.

20. A small or intelligent device is so called because it contains within it a
d. Sensor
Explanation: Computers are not called intelligent machines. They are the slaves in a box. Microcomputers are not called intelligent. Programmable devices are not intelligent. If they were intelligent, computers too are programmable devices. Any device that contains sensor can input data and according to the change in situation, so these devices are called intelligent. Thus, option d is correct answer.

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