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Short Answer Questions CBSE class-XI (C++ Python)

1.       What is Microprocessor and its use?

Ans: A microprocessor is a semiconductor chip and used to processes all the information in the computer with help of memory. Microprocessor is manufactured using the Large Scale integration (LSI) or Very Large Scale Integration (VLSI), which includes Arithmetic Logic Unit (ALU), Control Unit (CU) and Central Processing Unit (CPU) on a single chip.

2.       When and who has invented the computer memory?

Ans: The concept of memory was recognized by Burks, Goldstine, and Von Neumann in 1946.

3.       What is register and what is the relationship with flip-flops?

Ans: A register is a very small amount of very fast memory that is built into the CPU. The flip-flops are the smallest unit of hardware to store binary information. Several flip-flops put together to form a register.

4.       What is Bus? And what are the types?

Ans: A Bus is used to transmit the data. It carries the data from one part of computer to another.  There are three types of buses.

(i)       Data Bus,

(ii)     Address Bus and

(iii)  Control Bus.

5.       What is the role of different type of buses?

Ans:

·         Data Bus used to carry the data from one location to another.

·         Address Bus used to carry the address of the location.

·         Control Bus carries the mode i.e. read or write.

6.       What do you mean by Microprocessor bit structure/

Ans: Microprocessor bit structure indicates the width of the registers. A 16-bit microprocessor can process data and memory addresses that are represented by 16 bits.

7.       What are the types of memory?

Ans: Computer Memory is basically two types:

(i)                  Primary memory and

(ii)                Secondary memory.

8.       What is Primary Memory?

Ans: Primary Memory is internal memory of the computer. RAM and ROM both form part of primary memory. The primary memory provides main working space to the computer.

9.       What do you mean by RAM and ROM?

Ans:

-         RAM stands for Random Access Memory, is volatile memory, which loses their content on the failure of power supply.

-         ROM stands for Read Only Memory, is non-volatile memory, which does not lose their content on the failure of power supply.

10.    What is Secondary memory?

Ans: Secondary memory is external and permanent memory and concerned with magnetic memory. It can be stored on storage media like floppy disks, magnetic disks, magnetic tapes, etc.

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Latest C++ jobs in NCR Delhi Noida Gurgaon

C++ Job at Delhi/NCR

Company name : Integrated Digital Systems(www.idsgis.com)

Location : Delhi/NCR
Experience : Fresher
Eligibility : B.Tech/B.E/B.Sc/BCA/M.Sc/MCA
Skills : C++ or VC++
C++ or vc++ Programmer jobs in Delhi for freshers at Integrated Digital Systems

Job Description :
Programmer for Electronic Warfare Simulator.

Desired Profile : Only candidates with good knowledge of C++ or VC++ and strong in maths should apply.
Candidates having exposure to Visual Studio.Net will be given preference.

Apply

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Question Answers Chapter-2 Computer Science (C++ Python) Class-XI CBSE

Short Answer Questions: (Chapter-2 Computer Science (C++ Python) Class-XI CBSE)

1.       What is Bit?

Ans: The smallest and basic unit of information in digital computer is called a bit. Bit is the abbreviation of Binary Digit.

2.       What do you mean by base/radix?

Ans: The base or radix of a number system represents the number of digits or basic symbols in that particular number system.

3.       What are the different number systems are available for in computer system?

Ans: There are four basic number systems:

i)                    Binary Number systems

ii)                  Octal Number systems

iii)                Decimal Number systems

iv)                 Hexadecimal Number systems 

4.       What is the base of binary number system and what are the digits used for binary number system?

Ans: Numbers with base 2 represent the binary numbers, which includes only two digits 0 and 1.

5.       What is the base of octal number system and what are the digits used for octal number system?

Ans: The numbers with base 8 represent the octal numbers, ranging digits from 0 to 7.

6.       What is the base of decimal number system and what are the digits used for decimal number system?

Ans: The numbers with base 10 represent the decimal numbers, ranging digits from 0 to 9.

7.       What is the base of Hexadecimal number system and what are the digits used for Hexadecimal number system?

Ans: The Hexadecimal number system has base 16 and contain 16 symbols, from 0 to 9 and A to F.

8.       How the decimal number system converts into another base of number system?

Ans: To convert from decimal to a different number base such as Octal, Binary or Hexadecimal involves repeated division by that number base, Keep dividing until the quotient is zero, Use the remainders in reverse order as the digits of the converted number.

9.       How can Base_N number system may be converted into decimal number system?

Ans: To convert from Base_N to Decimal number, Multiply each digit by increasing powers of the base value and add the terms

10.    Write down something about following:

i)                    ASCII

ii)                  EBCDIC

iii)                UNICODE

Ans: i) ASCII (American Standard Code for Information Interchange) code represents each character in a standard character set as a single byte binary code.

ii) EBCDIC was one of the first widely-used computer codes that supported upper and lowercase alphabetic characters, in addition to special characters, such as punctuation and control characters.

iii) A universal character standard was developed that supports a more character sets, called Unicode. 

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Question Answers Chapter-1 Computer Science (C++ Python) Class-XI CBSE

Short Answer Questions for Chapter-1 Computer Science (C++ Python) Class-XI CBSE

1.       What is Computer?

Ans: Computers are human made electronic machines that perform tasks or calculations according to a set of instructions, or given programs.

2.       What is the name of the machine which is also treated as first computer from beginning of computer generation?

Ans: ABACUS is a machine which is treated as a first computer in generation of computers. It is also being used by the students in today’s life for fast calculation.

3.       When was started the era of modern computers?

Ans: The generation of modern computers was started from1942 and occupy lot of space and uses vacuum tubes to control and amplify electronic signals.

4.       In which year second generation was started and what was the main invention in this generation?

Ans: Second generation of computer started from 1955 with the invention of “Transistors”. These were smaller and less expensive as compared to first generation computers.

5.       When did the chip based computers invent?

Ans: The third generation computers replace transistors with integrated circuits popularly known as “Chips” from 1958.

6.       When microprocessor was introduced?

Ans: The advent of microprocessor chip marked the beginning of fourth generation computers from 1975 onwards.

7.       What is the new advancement in the fifth generation?

Ans: The fifth generation computing devices are based on artificial intelligence and are still in development, though there are features like voice recognition, face recognition, finger print recognition, gesture recognition etc. are being used today.

8.       What is data?

Ans: Data are raw facts and figures. These raw values could be numbers, characters, transactions, dates, true/false values, symbols or readings from sensors.

9.       What do you mean by Information?

Ans: Information is data that has been processed by a computer. It is what the computer outputs. Information has a context which makes it meaningful.

10.    What is the basic division of a computer system?

Ans: A computer system consist four basic units; input unit, storage unit, central processing unit and output unit.

11.    What is the role of input unit?

Ans: Input unit is used for entering data and programs into the computer system by the user for processing.

12.    Why storage/memory unit is so important?

Ans: Storage/memory unit is used for storing data and instructions before and after processing. It provides us storage to save our data for long time.

13.    Which unit of computer is used for producing the output?

Ans: The output unit is used for storing the result as output produced by the computer after processing.

14.    Which unit is responsible for calculations and processing of the computer instructions?

Ans: The Central Processing Unit (CPU) takes data and instructions from the storage unit and makes all sorts of calculations based on the instructions given and the type of data provided. CPU includes Arithmetic logic unit (ALU) and control unit (CU).

15.    What is the use of ALU and CU?

Ans: CPU includes two units: Arithmetic logic unit (ALU) and control unit (CU).

-          ALU: All calculations and comparisons, based on the instructions provided, are carried out within the ALU.

-          CU: Controlling of all operations like input, processing and output are performed by control unit.

16.    What is  Booting process?

Ans: Booting is a startup sequence that starts the operating system of a computer when it is turned on.

17.    Define followings:

(i)                  Digital Computer

(ii)                Analog Computer

(iii)              Hybrid Computer

(iv)               Supercomputer

(v)                 Mainframe Computers

(vi)               Minicomputers

(vii)             Microcomputers

Ans:

(i) Digital Computer: Computers designed by using the binary digital number system are called digital computers which can count and accept numbers and letters through various input devices.

(ii) Analog Computer: The Analog computers which process data input in a continuous form (unbroken flow of information).

(iii) Hybrid Computer: A combination of the Analog and digital computers can be called hybrid computers.

(iv) Supercomputers: Supercomputers are largest and fastest computers can process 64 bits or more at a time.

(v) Mainframes: Mainframes are less powerful and cheaper than supercomputers. Mainframe can process several MIPS. More than 1000 remote terminals can be supported and have large on-line secondary storage capacity.

(vi) Minicomputers: Medium size computers can be called minicomputers. This type of computer performs data processing activities in the same way as the Mainframe but not on a smaller scale. The cost of minis is lower. A minicomputer can typically support 10 to 12 terminals.

(vii) Microcomputers Extremely small computers can be called microcomputers which consisting of a microprocessor and associated storage and I/O devices. They are also called Personal Computer systems.

18.    What is Computer hardware?

Ans: Computer Hardware refers to the parts of a computer that you can see and touch, including the case and everything inside it, such as- mouse, motherboard, keyboard, monitor, hard-disk, etc. 

19.    What is Computer software?

Ans: Computer Software refers to the instructions, or programs, for direct interaction with hardware for processing.

20.    What are the types of computer software?

Ans: Computer software are basically two types:

i)                     System software

ii)                   Application software.

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