Computer Questions Answers for Competitive Exams Set-23

Computer Questions  Answers for Competitive Exams Set-23

||Computer Questions  and Answers for Competitive Exams Set-23||Computer Questions  Answers for JOA IT,Computer operator & other exams||important computer related question answer||  


Computer Questions  Answers for Competitive Exams Set-23


1. A ‘bug’ in a programme is a 

(A) Statement 

(B) Error 

(C) Signature 

(D) both (B) and (C) 

Explanation:-A software bug is an error, flaw, mistake, failure, or fault in a computer program or system that produces an incorrect or unexpected result, or causes it to behave in unintended ways. Most bugs arise from mistakes and errors made by people in either a program's source code or its design, and a few are caused by compilers producing incorrect code


2. DOS is a 

(A) Direct Operating System 

(B) Dual Operating System 

(C) Disk Operating System 

(D) Dial-up Operating System 

Explanation:-DOS ("Disk Operating System) is an acronym for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 including the partially DOS-based Microsoft Windows versions 95, 98, and Millennium Edition


 3. One Byte is equal to 

(A) 8 bits 

(B) 12 bits 

(C) 16 bits 

(D) 20 bits 

Explanation:-The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits. Historically, a byte was the number of bits used to encode a single character of text in a computer


4. Small and cheap computers built into several home appliances are of which type? 

(A) Mainframes 

(B) Mini computers 

(C) Micro computers 

(D) None of the above 

Explanation:-A microcomputer is a small, relatively inexpensive computer with a microprocessor as its central processing unit (CPU). It includes a microprocessor, memory, and input/output (I/O) facilities. They were at the centre of the home computer market segment.


5. What is the process of defining tables called ?

 (A) Data definition 

(B) Data Normalisation 

(C) Index definition 

(D) Data administration

Explanation:-The process is known as index definition. The order in which columns are listed in the index definition is important. A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of slower writes and increased storage space. Indices can be created using one or more columns of a database table, providing the basis for both rapid random lookups and efficient access of ordered records


6. Which of the following is an example of a database manager? 

(A) Organizer 

(B) Paradox 

(C) Quattro Pro 

(D) Corel Draw 

Explanation:-An electric organizer is a small calculator-sized computer, often with an in-built diary application but few other functions such as an address book and calendar. It normally has a small alphanumeric keypad and an LCD screen of one, two or three lines.


7. What are the signals that inform the operating system that some activity has taken place, called ? 

(A) Informers 

(B) Interrupts 

(C) Events 

(D) Handlers 

Explanation:-In computer programming, an event handler is an asynchronous callback subroutine that handles inputs received in a program. Each event is a piece of application-level information from the underlying framework, typically the GUI toolkit. GUI events include key presses, mouse movement, action selections, and timers expiring. Event handlers are a central concept in event-driven programming.


8. Small and cheap computers built into several home appliances are of which type ? 

(A) Mainframes 

(B) Mini computers 

(C) Micro computers 

(D) None of these 

Explanation:-A microcomputer is a small, relatively inexpensive computer with a microprocessor as its central processing unit (CPU). It is most commonly associated with the first wave of all-in-one 8-bit home computers and small business microcomputers (such as the Apple II, Commodore 64, BBC Micro, and TRS 80).


9. What is the process of defining tables called ? 

(A) Data definition 

(B) Data Normalisation 

(C) Index definition 

(D) Data administration

Explanation:- The process is known as index definition. The order in which columns are listed in the index definition is important.


10. Virus in a computer is a 

(A) Chemical that attacks silicon 

(B) Micro-organism that disturbs integrated circuits 

(C) Programme that damages the computer software 

(D) None of the above

Explanation:-A computer virus is a computer program that can replicate itself and spread from one computer to another. Computer virus is a term applied to any program that is designed to damage data stored on a computer system or network. The virus may infect documents, applications or worst of all system files that are essential to the correct running of the computer system. A virus itself is programme software and has effect basically on software and not hardware. It could have effect on the systems or Application software to execute specific instructions on the hardware.



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