Computer Questions Answers for Competitive Exams Set-22

 Computer Questions  Answers for Competitive Exams Set-22

||Computer Questions  and Answers for Competitive Exams Set-22||Computer Questions  Answers for JOA IT,Computer operator & other exams||important computer related question answer|| 

Computer Questions  Answers for Competitive Exams Set-22


1. Which of the following is not a computer network? 

(A) Wide area network 

(B) Local area network 

(C) Personal network 

(D) Metropolitan area network 

Explanation:-A personal network is a set of human contacts known to an individual, with whom that individual would expect to interact at intervals to support a given set of activities. Personal networks are intended to be mutually beneficial–extending the concept of teamwork beyond the immediate peer group. The term is usually encountered in the workplace


2. When a group of computers is connected together in a small area without the help of telephone lines, it is called : 

(A) Remote Communication Network (RCN) 

(B) Local Area Network (LAN) 

(C) Wide Area Network (WAN) 

(D) Value Added Network (VAN) 

Explanation:- A local area network (LAN) is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media. The defining characteristics of LANs, in contrast to wide area networks (WANs), include their usually higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines.


 3. Fifth generation computers do not have : 

(A) Speech recognition 

(B) Artificial intelligence 

(C) Very large scale integration 

(D) Vacuum tubes 

Explanation:- The period of first generation computers (1946- 1958) is referred to as the Vacuum Tube Years. The first generation computers were huge, slow, expensive, and often undependable. In 1946 Presper Eckert and John Mauchly built the ENIAC electronic computer which used vacuum tubes instead of the mechanical switches of the Mark I. The ENIAC led to other vacuum tube type computers like the EDVAC (Electronic Discrete Variable Automatic Computer) and the UNIVAC I (UNIVersal Automatic Computer).

 

4. Where does a computer add, compare and shuffle data ? 

(A) Memory chip 

(B) CPU chip 

(C) Floppy disk 

(D) Hard disk 

Explanation:-A central processing unit (CPU) is the hardware within a computer system which carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. Two typical components of a CPU are the arithmetic logic unit (ALU), which performs arithmetic and logical operations, and the control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary. In most computers, the shuffling of data between the CPU and RAM happens millions of times every second


 5. The letter ‘G’ used in ‘2G Spectrum’ stands for 

(A) Governance 

(B) Global 

(C) Generation

(D) Google 

Explanation:-2G (or 2-G) is short for second-generation wireless telephone technology. Three primary benefits of 2G networks over their predecessors were that phone conversations were digitally encrypted; 2G systems were significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS text messages.


 6. Double is a ______ data type. 

(A) primitive 

(B) user defined 

(C) system defined 

(D) local

 Explanation:-The Double class wraps a value of the primitive type double in an object. An object of type Double contains a single field whose type is double. In addition, this class provides several methods for converting a double to a String and a String to a double, as well as other constants and methods useful when dealing with a double.

 

7. Most of the computers available today are : 

(A) 3rd generation computers 

(B) 4th generation computers 

(C) 5th generation computers 

(D) 6th generation computers 

 Explanation:-Fourth Generation computers are the 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.

 

8. A ____ is a high-speed network that connect local networks in a city or town. 

(A) LAN 

(B) MAN 

(C) WAN 

(D) TAN 

 Explanation:-A metropolitan area network (MAN) is a computer network that usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high-capacity backbone technology, such as fiber-optical links, and provides uplink services to wide area networks (or WAN) and the Internet.

 

9. PDA stands for 

(A) Personal Digital Assistant 

B. Personal Development Agency 

(C) Personal Data Authority 

(D) Personal Data Array 

 Explanation:-A personal digital assistant (PDA), also known as a palmtop computer, or personal data assistant, is a mobile device that functions as a personal information manager. PDAs are largely considered obsolete with the widespread adoption of smartphones. Nearly all current PDAs have the ability to connect to the Internet.

 

10. The device that converts computer output for transmission over telephone lines is called 

(A) interface 

(B) interpreter 

(C) modem 

(D) I/O port

 Explanation:-The modem is an external device or internal electronic circuitry used to transmit and receive digital data over a communications line normally used for analog signals. A modem attached to a computer converts digital data to an analog signal that it uses to modulate a carrier frequency. This frequency is transmitted over a line, frequently as an audio signal over a telecommunications line, to another modem that converts it back into a copy of the original data


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