Computer Science
Class-VI
Chapter-12 More About Computers
A. Tick the correct answer:
1. The word computer is adopted from a ____________________ word "COMPUTARE".
a. arabic b. english c. hindi d. latin
Answer: Latin
2. John Von Neumann, Mauchly and his team developed_______________.
a. EEDVAC b. EDVAAC c. ENIC d. EDVAC
Answer: EDVAC
3. The machine language consists of two numbers, ____________.
a. 0 and 1 b. 10 and 1 c. 0 and 11 d. 0 and 0
Answer: 0 and 1
4. COBOL, LOGO, FORTRAN, BASIC are the _______________ generation languages.
a. fourth b. second c. third d. first
Answer: third
5. The CPU has three main units____________________.
a. CU, ALU and MUI b. CU, ACU and Memory c. AC, ALU and Memory d. CU, ALU and MU
Answer: CU, ALU and MU
B. Fill in the blanks:
1. CU stands for____________________________.
Answer: Control Unit
2. MU stands for _____________________________.
Answer: Memory Unit
3. ALU stands for __________________________.
Answer: Arithmetic Logical Unit
4. The need of a fast and accurate _____________________ led to the invention of computers.
Answer: Calculation
5. _________________ is the first mechanical calculating device.
Answer: Abacus
6. ENIAC stands for ________________________________________________________.
Answer: Electronic Numerical Integrator and computer.
7. The memory unit is also known as the ______________________ storage unit.
Answer: Primary
C. Write true or false:
1. COMPUTARE is a latin word.
Answer: T
2. There are six types of benefits that a computer provides.
Answer: F
3. The Jacquard loom greatly increased productivity and reduced the cost for textile.
Answer: T
4. J.V. Atanasoff designed the first commercial computer.
Answer: F
5. Hollerith founded the tabulating machine company 1986, which was one of three companies that merged to form IBM in 1911.
Answer: T
6. A computer understands only the machine language that consists of two numbers, 7 and 9.
Answer: F
7. The control unit sends the processed data into the memory unit.
Answer: T
D. Answer the following questions:
1. What is the first mechanical calculating device?
Answer: First mechanical calculating device is Abacus. It consists of row of wires in a wooden frame, which have beads strung on them.
2. Write the definition of computer.
Answer: Computer is an electronic machine. The word computer is adopted from a latin word COMPUTARE, which means to calculate or compute.
3. How many basic types of benefits computer provides?
Answer: Basic benefits of computer:
* Speed
* Accuracy
* Storage
* Diligence
* Versatility
4. Who was Charles Babbage? Why is he called the father of computer?
Answer: The real beginning of computer was laid by Charles Babbage. Babbage's first wattempt was in 1822, when he proposed a machine to perform differential equations.
Charles Babbage developed analytical engine. Charles Babbage is also called the father of computer.
5. What is a programming language? Name some common computer languages.
Answer: A computer language also known as programming language. Three levels of programming languages are available. They are:
* Machine language
* Assembly language
* High level language
6. Explain the three units of the CPU.
Answer: Three units of the CPU:
* Control Unit: This unit controls the processing of data inside the computer system.
* Memory Unit: This unit stores the data during the processing.
* Arithmetic Logic Unit: This unit is responsible for performing all the mathematical calculations and logical operations.
7. What are the various generations of computer?
Answer: There are five generations of computer:
* First generation (1940-1956): In this generation, vacuum tubes were used to store and process the data.
* Second generation(1956-1963): In this generation transistors were used in computers.
* Third generation(1964-1971): In this generation Integrated circuits were used.
* Fourth generation(1971-1985): In this generation very large scale integrated circuit were used.
* Fifth generation(1985 -Present): In this generation AI(Artificial Intelegence) is used.
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