ICSE Class 10 Computer Applications Pre-board Papers 1 and 2 (MCQ)

ICSE Class 10 Pre-board 1 SECTION A (30 Marks) Question 1 Choose the correct answer [5×1] (a). Default value of character data type is 1. ‘\u0000C’ 3. ‘\u0000’ 2. \a0000 4. none of the above (b). Which of the following is an infinite loop 1. int i=5; for(int a=0;i<20;a--) 3. for(a=0;a<20;a++){ } 2. int a =5; while(a<20) a++; 4. for(int a=2;a<20;a+=2) (c). Which type of casting shown by the following example long y =15 , int x ; x = (int) y; 1. Explicit Type Casting 2. Implicit Type Casting 3. None of the above (d). Which keyword is used to represent the current object? 1. new 3. return 2. this 4. none of the above (e) What is a function with the same name as that of its class is called? 1. Constructor 3. Function 2. Constructor overloading 4. Function overloading Question 2 Fill in the blanks with the correct option [5×1] (a). What is the result of 111 % 13 = _________ 1. 3 3. 7 2. 5 4. 9 (b). JVM is used to convert_________ in to machine code. 1. Object Code 3.Intermediate Byte code 2. Source Code 4.None of the above (c). A java program developed and executed by the users by using web browser is known as ___________ 1. application 3. applets 2. none 4. objects (d) The correct constructor definition of class Cartoon that has a int and double as parameter is______ 1. Cartoon (int a, double b) 3. int Cartoon (int a, double b) 2. void Cartoon (int a, double b) 4. public Cartoon (int a, int b) (e)._____________ is not an entry controlled loop 1. break 3. do- while 2. while 4. for Question 3 Name the following [5×1] (a). Java supports this character set only. 1. ASCII 3. Unicode 2. ISCII 4. none of the above (b). The smallest unit in a java program is known as. 1. Identifier 3. Separators 2. Token 4. JVM (c). The extension of a java source code file 1. .java 3. .class 2. .txt 4. none of the above (d). A keyword used to import a package in a class. 1. export 2. Token Page 1 of 7 3. import 4. impart (e). An operator that gives the remainder of a division operation. 1. & 3. # 2. % 4. / Question 4. State True or False (a). The default value of boolean is. 1. true (b). The identifier in java may be of any length. 1. true (c). The statement p=-9 and p=p-9 is same. 1. true (d). A method can return more than one value. 1. true (e). The output of System.out.println(!true);is false. 1. true 2. false 2. false 2. false 2. false 2. false Question 5 Choose the odd one (a). 1. Identifier 2. Separator (b). 1. {} 2. > (c). 1. \n 2. \t (d). 1. byte 2. short (e). 1. for 2. if…else Question 6 Give the output of the following (a). What happens if x is set to 100? if(x>0) { if(x>10) { System.out.print(“HIE”); }else{ System.out.println(“HELLO”); } }else { System.out.print(“BYE”); } 1. HIE 2. BYE 3. Keyword 4. new 3. ; 4. , 3. \r 4. ++ 3. int 4. char 3. while 4. do..while 3. HELLO 4. NONE Page 2 of 7 [5×1] [5×1] [5 × 1] (b) char a='A'; a++; System.out.println((int)a); 1. 66 2. 65 (c) int a=0, x=0; while(x++<4) a+=x; System.out.print(a); 1. 5 2. 10 (d) 3. 70 4. 91 3. 12 4. 6 What will be the output of the code given in the image? 1. 5 8 2. 8 5 3. 5 4 (e) Math.ceil(-10.01) = ____________. 1. -11.0 2. -11 4. None of the above 3. -10.1 4. -10.0 SECTION B (20 Marks) Page 3 of 7 Question 7 Given below is a class with the following specifications: (a) void series(int x, int n): to display the sum of the series given below: x1 + x2 + x3 + … + xn terms (b) void series(int p): to display the following series: 0, 7, 26, 63, … p terms. (c) void series(): to display the sum of the series given below: 1/2 + 1/3 + 1/4 + … + 1/10. class Overload { public void series((a)______,int n){ double sum = 0L; for(int i = 1; i <= n; i++) { sum=sum+(b)_________; } System.out.println("Sum of series is " + sum); } public void series(int p) { int term=0; for(int i = 1; (c)________; i++) { term = (int)((d)______-1); System.out.print(term + ","); } } public void series() { double sum = 0.0; for((e)______;i <= 10; i++) sum = sum+ 1.0 / i; System.out.println("Sum of series is " + (f)_____); } Fill in the blanks of the given program with appropriate java statements (a). 1. int x 2. double x 3. int i (b). 1. Math.pow(x*x, 2. Math.pow(x, i) 3. Math.pow(x,x) (c). 1. i >=p 2. i <= p 3. i==p (d). 1. Math.pow(i, 2) 2.Math.pow(i, 3) 3. i*i (e). 1. int i = 1 2. int i=2 3. int i=0 (f) 1. sum 2. sum+i 3. i Question 8: The following program is based on the specification given below. Fill in the blanks with appropriate java statements. class: ElectricBill Instance Variable/ data member: String n – to store the name of the customer int units – to store the number of units consumed double bill – to store the amount to paid Page 4 of 7 Member methods: void accept() – to accept the name of the customer and number of units consumed void calculate() – to calculate the bill as per the following tariff : Number of units Rate per unit First 100 units Rs.2.00 Next 200 units Rs.3.00 Above 300 units Rs.5.00 A surcharge of 2.5% charged if the number of units consumed is above 300 units. void print() – To print the details as follows : Name of the customer ……… Number of units consumed …… Bill amount ……. void main(): to create an object of the class and call the above member methods. import java.util.Scanner; class (a)__________ { String n; int units; double bill; public void accept() { Scanner sc = new Scanner((b)__________); System.out.print("Please Enter name: "); n = (c)_________; System.out.print("Please Enter units: "); units = sc.nextInt(); } public void calculate() { if (units <= 100) { bill = units * 2; } else if (units > 100 && units <= 300) { bill = 100 * 2 + ((d)______'') * 3; } else { bill = 100 * 2 + 200 * 3 + (units - 300) * 5; double surcharge =(e)_________; bill = bill + surcharge; } } public void print() { System.out.println("Name of the customer is" + n); System.out.println("Number of units consumed is " + units); System.out.println("Bill amount is " + bill); } Page 5 of 7 public static void main() { ElectricBill obj = new ElectricBill(); obj.accept(); (f)_________; obj.print(); }} (a). 1. ElectricBill 2. electric bill (b). 1. system.in 2. System.in (c). 1. sc.next() 2. sc.nextLine() (d). 1. units+100 2. units - 100 (e). 1. bill * 3.5 / 100 2. bill*4.5/100 (f). 1. obj.calculate() 2. calculate.obj() 3. Class 3. Scanner 3. Sc. NextInt() 3. units 3. bill * 2.5 / 100 3. obj.ElectricBill() Question 9 The following program segment inputs a number and print whether it is a pronic number or not. Pronic number is the number which is the product of two consecutive integers. Examples: 12 = 3 × 4 20 = 4 × 5 42 = 6 × 7 Fill in the blanks with appropriate java statements. void pronic(int num) { (a)_______ flag = false; for (int i = 1; i < (b)_____; i++) { if ((c)_______== num) { flag = true; }} if(flag==(d)_______) System.out.println(num+ " is a Pronic number "); else System.out.println(num+ " is not a Pronic number "); }} (a). 1. int 2. boolean 3. char (b). 1. num 2. 0 3. num-1 (c). 1. i*i 2. i*i 3. (i*(i+1)) (d). 1. true 2. false 3. 0 Question 10 Read the paragraph given below and answer the questions given below: Case study 1 Object Oriented Programming (OOP) represents the program as a set of objects. An object is an identifiable entity that has a set of attributes, behavior, and state. Attributes are individual Page 6 of 7 characteristics that differentiate one object from the other. The actions or operations an object can perform is called its behavior. The state of an object is defined by the set of values held by its attributes. Objects that share the same attributes and behavior are grouped together into a Class. An object belonging to a particular class is known as an instance of that class. Classes can be derived from other classes. The class that is derived from another class is called a sub class. class from which it is derived is called the superclass. (a). _________is an identifiable entity that has a set of attributes, behavior, and state. 1. object 2. class 3. State (b). All the objects of the same class will have the same state. 1. true 2. false (c). __________defines the characteristics of a class 1. class 2. Attributes 3. functions (d). The class that is extended from another class is called________. 1. State 2. super class 3. sub class Page 7 of 7 ―――――――――― ICSE Class 10 Pre-board 2 Standard: X Subject: Computer Max Marks: 50 Max. Time 1 hour ________________________________________________________________________________ SECTION A (30 Marks) Question 1 Choose the correct answer [5×1] (a). Which of the following is known as Source Code? 1. The program file containing the actual instructions in Java 2. The output of the compiler after a processes source code 3. The bytecode we get after compiling the source code using javac compiler 4. None of the above (b) The blueprint from which objects are created in Java is known as. 1. Interface 2. Package 3. Class 4. Language (c)Operators with higher precedence are evaluated before operators with relatively lower precedence. Arrange the operators given below in order of higher precedence to lower precedence. (i) || (ii) % (iii) <= (iv)-- 1. (iv), (i), (iii), (ii) 3. (iv), (ii), (iii), (i) 2. (iv), (iii), (i), (ii) 4. (i),(ii),(iii),(iv) (d) What is the value returned by the following line in Java? Math.floor(-7.912); 1. -7 3. -7.0 2. -8.0 4. None of the above (e) What will be the output of the following code snippet? int n=10; System.out.print(n); if(n==10) { n=20; System.out.print(n); } System.out.print(n); 1. 10 10 10 3. 10 10 20 2. 10 20 20 4. 0 10 0 Question 2. Fill in the blanks with the correct option [5×1=5] (a) ------------- is defined as an act of representing the essential features without knowing the background details. 1. Inheritance 3. Encapsulation 2. Polymorphism 4. Abstraction (b)The number of bits occupied by short data type is -------------bits 1. 8 2. 16 3. 32 4. 64 (c)-----------data type are pre-defined or built-in data type because the system developers of Java have defined them. 1. Non-primitive 3. Both Primitive or non-primitive 2. Primitive 4. None of the above Page 1 of 7 (d) Data conversion in which the bigger data type is converted into a smaller data type as per user's choice. . 1. Explicit Conversion 3. Default 2. Implicit Conversion 4. None of the above (e)Method that accepts a string without any space is --------- 1. nextLine() 2. Next() 3. next() 4. nextint() Question 3. Name the following [5X1=5] (a)The default initial value of boolean data type. . 1. " " 2. '\u0000' 3. false 4. ' ' (b)Identify the category of the loop given below for(int i=1;i<=10;i++){} 1. Infinite Loop 2. Finite Loop 3. Null Loop 4. Empty Loop (c)A function which returns a value to its caller module. It also doesn't change the states of an object. 1. Impure Methods 3. Pure Function 2. Mutator 4. Accesser Method (d) The type of variable which are a common copy for each object. 1. Class Variables 3. Static Variables 2. Instance variables 4. none (e) A constructor that is used to initialize the instance variables of a class without taking any parameters. 1. Non-parameterized constructor 3. Parameterized constructor 2. Constructor 4. Copy Constructor Question 4. State True or False [5X1=5] a) Constructors can be called explicitly. 1. True 2. false b) A package is a collection of data 1. True 2. false c). A function with the same name but with different argument list are known as function overloading. 1. True 2. false d). The function System.exit(0) which is used to terminate the execution at any instance of the program. 1. True 2. false e). Run time error occurs at compile time when the compiler does not respond properly while executing a statement. 1. True 2. false Question 5. Choose Odd one out [5X1=5] (a) Page 2 of 7 1. * 2. + 3. (b) . 1. Break statement 2. return (c) . 1. Return Type 2. Local Variables (d) 1. Nested Member Methods 2. private (e) 1. java.util 2. java.io Question 6. Give the output for the following: % 4. && 3. Continue Statement 4. while loop 3. Parameter List 4. Access Specifier 3. public 4. protected 3. java.Math 4. java.lang [5x1=5] (a) What is the output of the following snippet? char c='A'; short m=26; int n=c+m; System.out.println(n); 1. 26 2. A 3. A91 4. 91 (b) int x=4, y=8,z=0; Z*=--y- y--+ ++y + x++ - ++x; System.out.println(x+ “ “+y); 1. 7 7 2. 6 7 3. 6 6 (c) Which keyword is used to refer the currently calling object? 1. this 2. new 3. return (d)int p=100, q=200; boolean r=(p==q); System.out.println(r); 4. 0 6 4. void 1. 0 2. false 3. true (e)Predict the output - System.out.println("Year"+21+22); 4. Error 1. Year 21 22 4. error 2. Year 43 3. Year2122 Section B 20 marks Question 7. Given below is a class with the following specifications: Page 3 of 7 (a) 1. hcflcm (b) 1. HcfLcm (c) 1. / (d) 1. lcm (e) 1. Scanner.in (f) 1. X,Y 2. HCFLCM 2. HCFLCM 2. . 2. 0 2. System.out 2. x,y 3. Hcf_Lcm 3. Hcf_Lcm 3. % 3. Hcf 3. System.in 3. Y 4. Hcflcm 4. Hcflcm 4. + 4. hcf 4. system.in 4. X Question 8.Program Specification Page 4 of 7 Program Code (a) 1. Series (b) 1. i=2 (c) 1. i>n (d) 1. i-- (e) 1. i (f) 1. Math.pow Question 9. 2. series 2. i=n 2. i<=m 2. I++ 2. j 2. math.power 3. Series() 3. i=1 3. i<=n 3. i++ 3. I 3. Math.power 4. series() 4. i=0 4. I<=n 4. i+=2 4. J 4. Math.max Page 5 of 7 (a) Name the movement of control from one line to other in a program 1. Control the flow 4. None of the above 2. Flow of Control 3. Controlling the flow (b) The condition when the break statement is not used after each case statement, and where the control executes the next case. 1. Through the Fall 3. Failing through 2. Falling through 4. Fall Through (c)The case which gets executed when the value doesn't match with any of the cases listed in the switch case 1. By default case 3. return 4. Return 2. default (d) Name the statement which is used to direct the control to execute either of the 2 blocks of statement based on given condition. 1. Switch Case 3. while loop 2. if statement Question 10. Program Specification 4. for loop public void perfect(int a) { int rem; int rev=____(a)___; int num=a; while(___(b)____) { rem=a%10; rev=____(c)____+rem; a=____(d)_____; } System.out.println(rev); } (a). Page 6 of 7 1. 0 (b). 1. a>=rem (c). 1. rev*i (d). 1. a/10 2. 1 2. a==0 2. rev*10 2. a*10 3. a 3. a!=0 3. rev+1 3. a%10 Page 7 of 7