Q: Question 1(i)What will be the output of the following code?int size = 2; if (size < 0) System.out.println("Small"); else if (size == 0) System.out.println("Medium"); else System.out.println("Large");SmallLargeMediumRuntime error

LargeReason — Since size > 0, hence the conditions of if and else if are false. Thus, the else block will be executed and "Large" will be printed on the screen.

Question 1

Question 1(i)What will be the output	of the following code?int size = 2;
if (size < 0)
    System.out.println("Small"); 
else if (size == 0)
    System.out.println("Medium");
else
    System.out.println("Large");SmallLargeMediumRuntime error

Accepted Answer

LargeReason — Since size > 0, hence the conditions of if and else if are false. Thus, the else block will be executed and "Large" will be printed on the screen.

Question 2

Question 1(ii)Which of the following statements involves a fall through?if-elsefor loopif-else-ifswitch

Accepted Answer

switchReason — Omitting break statement leads to program execution continuing into the next case and onwards till a break statement is encountered or end of switch is reached.

Question 3

Question 1(iii)Which of the following statement is true for logical errors?The compiler does not detect these errors.There is no indication of error when the program is executed.The program may produce correct results for some input data and wrong results for other input data.All of the above

Accepted Answer

All of the aboveReason — The compiler does not detect logical errors and there is no indication of error when the program is executed. The program may produce correct results for some input data and wrong results for other input data.

Question 4

Question 1(iv)Object oriented programming mainly usestop down approachtop down and bottom up approachbottom up approachNone of the above

Accepted Answer

bottom up approachReason — Object Oriented Programming follows bottom-up approach because in OOP we first identify the smallest parts of the program i.e. the objects. We then combine these objects to develop the complete program.

Question 5

Question 1(v)In which technique are the values of actual parameters copied to the formal parameters?Call by referenceCall by valueCall by argumentCall by method

Accepted Answer

Call by valueReason — In call by value, the actual parameters are copied to formal parameters. Any changes to formal parameters are not reflected onto the actual parameters.

Question 6

Question 1(vi)Which package would you import for the Scanner class?java.util.*;java.awt.*;java.io.*;java.lang.*;

Accepted Answer

java.util.*;Reason — Scanner class is a part of java.util package.

Question 7

Question 1(vii)Give the output of Math.abs(x); when x = -9.99.-9.999.990.99None of these

Accepted Answer

9.99Reason — Math.abs() returns the absolute value of its argument. Its return type is same as the type of its argument. Thus, Math.abs(-9.99) returns 9.99.

Question 8

Question 1(viii)A/An ............... is an abstract description of a set of objects.abstractionencapsulationpolymorphismclass

Accepted Answer

classReason — A class is an abstract description of a set of objects.

Question 9

Question 1(ix)This variable can be accessed by calling with the class name.InstanceLocalClassNone of these

Accepted Answer

ClassReason — Class variable can be accessed by calling with the class name.

Question 10

Question 1(x)The	main objective of passing arguments to functions ismessage passingparameter passingvariable passingargument passing

Accepted Answer

message passingReason — The main objective of passing arguments to functions is message passing.

Question 11

Question 1(xi)If int arr [] = {3, 5, 7, 9}; what is the value of arr.length?354Cannot be determined

Accepted Answer

4Reason — length property stores the number of elements in an array. Thus, the value of arr.length is 4 as there are 4 elements in the array.

Question 12

Question 1(xii)A binary searchcan be used with sorted arrays only.can be used with unsorted arrays only.can be used with both sorted and unsorted arrays.cannot be used with arrays.

Accepted Answer

can be used with sorted arrays only.Reason — A binary search can be used with sorted arrays only.

Question 13

Question 1(xiii)Corresponding wrapper class of float data type isFLOATfloatFloatFloating

Accepted Answer

FloatReason — Corresponding wrapper class of float data type is Float.

Question 14

Question 1(xiv)What will be the output of the following code?System.out.println("Lucknow".substring (0, 4));LucknowLucknLuckluck

Accepted Answer

LuckReason — The substring() method returns a substring beginning from the startindex and extending to the character at index endIndex - 1. Since a string index begins at 0, the character at startindex (0) is 'L' and the character at the endIndex (4-1 = 3) is 'k'. Thus, "Luck" is extracted and printed on the screen.

Question 15

Question 1(xv)This access specifier is the most open access level.PublicProtectedPrivateDefault

Accepted Answer

PublicReason — A data member or member method declared as public is accessible inside as well as outside of the class in which it is declared.

Question 16

Question 1(xvi)The method to determine whether the specified char value is in uppercase or not.toUpperCase(char)toLowerCase(char)isLowerCase(char)isUpperCase(char)

Accepted Answer

isUpperCase(char)Reason — isUpperCase() is used to check if the character given as its argument is in upper case or not. It returns true if the argument is in uppercase, else returns false.

Question 17

Question 1(xvii)Assertion (A) Method should be called explicitly either with object reference or class reference.Reason (R) Method can be any user defined name.Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).Assertion (A) is true and Reason (R) is false.Assertion (A) is false and Reason (R) is true.

Accepted Answer

Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).Reason — Assertion (A) is true as a method should be called explicitly either with object reference or class reference. Reason (R) is also true as a method can be any user defined name, except a keyword. Reason (R) is not the correct explanation of Assertion (A).

Question 18

Question 1(xviii)Read the following text and choose the correct answer:Public access specifier allows a class to expose its member variables and member functions to other functions and objects. Any public member can be accessed from outside the class.Which of these access specifier must be used for class so that it can be inherited by another subclass?publicprivateprotectednone of the mentioned

Accepted Answer

publicReason — According to the given context, public access specifier can be used for class so that it can be inherited by another subclass.

Question 19

Question 1(xix)Assertion (A) The return statement causes program control to transfer back to the caller of the method.Reason (R) The return statement immediately terminates the method in which it is executed.Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).Assertion (A) is true and Reason (R) is false.Assertion (A) is false and Reason (R) is true

Accepted Answer

Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).Reason — Assertion (A) is true as the return statement causes program control to transfer back to the caller of the method. Reason (R) is also true as the return statement immediately terminates the method in which it is executed and the control transfers back to the caller method. Thus, Reason (R) correctly explains Assertion (A).

Question 20

Question 1(xx)Correct	statement to declare an integer array of 10 elements.int[ ] arr = new int[10];int arr;int arr (10);int ( ) arr = new int (10);

Accepted Answer

int[ ] arr = new int[10];Reason — The correct syntax to declare an array is as follows:datatype[ ] array_name = new datatype[size];The statement int[ ] arr = new int[10]; follows the correct syntax of array declaration.

Solved Sample Paper 3