Trinity International SS & College
Second Term Examinations 2078
Class: XI Time: 2 hours
Stream: Science Shift: Morning Full Marks: 50
Subject: Computer Science
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
Group A
(Multiple choice questions)
Tick the best alternatives (9*1=9)
Q1. Which of the following is the smallest visual elements on a video monitor?
Character b) Pixel c) Byte d) Bit
Q2. Which of the following is equal to kilobyte?
1024 bytes b) 1024 MB c) 1024 GB d) 1024 bits
Q3.The use of the IC in computer has…………………………?
Increased the amount of heating
Reduced the size and cost of the computer
Reduced the peripheral devices to be used
Reduced the performance capacity of the computer
Q4. Which of the following is the Associative law of the Boolean algebra?
A+B = B+A b)A+(A.B) = A
c) (A+B)+C = A+(B+C) d) A.(B+C) = A.B + A.C
Q5. Which of the following is not an operating system?
UNIX b)MS-DOS c)Linux d) Pascal
Q6. Which symbol is used for absolute referencing in spreadsheet?
@ b) # c) % d) $
Q7. Which of the following is problem oriented language?
BASIC b) C Language c) FORTRAN d) C# Language
Q8. Valid identifiers cannot start with………………….
digit b) underscore c) uppercase d) lowercase
Q9. Which of the following header file must require to execute getch() in a program?
conio.h b) stdio.h c) stdlib.h d) string.h
Group B
Give short answers to the following questions. (5*5=25)
Q10. What is bus in computer architecture? Explain different types of bus with suitable diagram. (1+3+1)
OR
Define hexadecimal number system. Perform the following operations (1+2+2)
Convert (FACE.CAFE)16 into decimal number system.
Perform (1001)2-(1010)2 using 2’s complement.
Q11. Define OS. Explain any four functions of OS. (1+4)
Q12. Explain any five features of spreadsheet.
OR
Differentiate between RAM and ROM.
Q13. Differentiate between compiler and interpreter.
Q14. Write a c program to check whether a number given by user is exactly divisible by 5 or not.
Group C
Give long answers to the following questions. (2*8=16)
Q15. Explain components of computer system with suitable block diagram. (6+2)
OR
Explain any four logic gates with necessary graphical symbol, truth table, Venn-diagram and Boolean expression. (2+2+2+2)
Q16. Write a C program to check whether a number given by user is palindrome or not. [8]
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Trinity International SS & College
Second Term Examinations 2078
Class: XI Time: 2 hours
Stream: Science Shift: Day Full Marks: 50
Subject: Computer Science
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
Group A
(Multiple choice questions)
Tick the best alternatives (9*1=9)
Q1. What is the smallest unit of information?
Nibble b) Block c) Byte d) Bit
Q2. Central processing unit is located in …………..
System Unit b) Memory Unit c) Memory d) Hard Disk
Q3. Computer is free from tiresome and boredom. We call it …
Accuracy b) Reliability c) Diligence d) Versatility
Q4. What is the 2’s complement of 0101?
0101 b) 0110 c) 1011 d) 1100
Q5. What is the fastest growing OS in mobile phone?
Window-10 b) Black berry OS c) Kali-Linux d) Android
Q6. Spelling and grammar mistake can be checked by pressing….
Alt + Shift b) Alt + F7 c) F7 d) Ctrl + F7
Q7. What is the BCD value of 13?
1101 b) 0001 0011 c) D d) 15
Q8. Which operator is used to find the remainder of two integers?
/ b) <> c) MOD d) %
Q9. Which component is not required to define a simple loop?
Initialization b) condition c) counter d) break
Group B
Give short answers to the following questions. (5*5=25)
Q10. What is primary memory in computer system? Differentiate between RAM and ROM.
(2+3)
OR
Define denary number system. Perform the following task … (1+2+2)
Convert (3A2F.4B)16 into decimal number system.
Subtract (1111)2 from (101)2 using 1’s complement.
Q11. Define and categorize software. What are the roles of OS? (2+3)
Q12. What is word processor? Write some features and examples of word processing software.
(2+3)
OR
Differentiate impact and non-impact printer. (5)
Q13. What is pseudo code and explain its importance in programming. (5)
Q14. WAP to check if the given number is prime or composite. (5)
Group C
Give long answers to the following questions. (2*8=16)
Q15. Define the terms Truth table and Boolean function. Simply the following Boolean expression with all features(digital diagram and truth table of simplified expression):
(1+2+(2+2+1))
(X+Y)(XY’Z + XYZ + XY’Z’)
OR
What is mobile computing? Explain the importance and uses (any 4) of mobile computing in communication. (2+2+4)
Q16. Write a menu-based program, using switch, to perform following task: (3+3+2)
Calculate sum of all elements of an array
Multiplication table of any given number
Exit
[Here, if we enter 1, it performs sum; if we enter 2, it performs multiplication table. And if we enter 3 it terminates/exits.]
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