Q: Question 1(v)The statement (1 > 0) || (1 < 0) evaluates to01falsetrue

trueReason — Logical OR operator returns true when even one of the conditions is true. Here condition (1 > 0) is true. Thus, the OR operator results in true.

Question 1

Question 1(i)Consider the following code snippetif (c > d)
    x = c;
else
    x = d;Choose the correct option if the code mentioned above is rewritten using the ternary operator.x = (c > d) ? c : d;x = (c > d) ? d : c;x = (c > d) ? c : c;x = (c > d) ? d : d;

Accepted Answer

x = (c > d) ? c : d;Reason — Correct syntax of ternary operator is:variable = (test expression) ? exp 1 : exp 2If the test expression is true, exp 1 is assigned to variable, else exp 2 is assigned to the variable.

Question 2

Question 1(ii)Which clause is optional in the switch statement?defaultcaseswitchNone of these

Accepted Answer

defaultReason — default clause is optional in the switch case.

Question 3

Question 1(iii)Errors occur in a program when :Syntax of the programming language is not followedthe program does not run properly or does not execute at allThe program produces an incorrect resultAll of the above

Accepted Answer

All of the aboveReason — Syntax errors occur when the syntax of the programming language is not followed. Runtime errors occur when the program does not run properly or does not execute at all and logical error occurs when the program produces an incorrect result.

Question 4

Question 1(iv)Object that share the same attributes and behaviour are grouped together into a/aninterfaceinstancealiasclass

Accepted Answer

classReason — Object that share the same attributes and behaviour are grouped together into a class.

Question 5

Question 1(v)The statement (1 > 0) || (1 < 0) evaluates to01falsetrue

Accepted Answer

trueReason — Logical OR operator returns true when even one of the conditions is true. Here condition (1 > 0) is true. Thus, the OR operator results in true.

Question 6

Question 1(vi)The parameters that are passed to the method when it is invoked are calledformal parametersactual parametersinformal parametersvoid parameters

Accepted Answer

actual parametersReason — The parameters that are passed to the method when it is invoked are called actual parameters.

Question 7

Question 1(vii)Give the output of Math.sqrt(x); when x = 9.0.33.03.00All of these

Accepted Answer

3.0Reason — Math.sqrt() method returns the square root of an argument. Thus, 3.0 is returned by Math.sqrt(9.0).

Question 8

Question 1(viii)What will be the output of the following code?String a[] = {"MI", "Samsung", "Micromax", "One Plus"};
System.out.println(a[3].length());8759

Accepted Answer

8Reason — a[3] refers to the fourth element of the array, which is "One Plus". The length() method returns the number of characters in the string. The string "One Plus" has 8 characters, including spaces. Therefore, the output of the code is 8.

Question 9

Question 1(ix)Polymorphism is broadly used in implementing ...............inheritanceencapsulationabstractionliterals

Accepted Answer

inheritanceReason — Polymorphism is broadly used in implementing inheritance.

Question 10

Question 1(x)Give the output of the followingswitch (x)
{
case 'M' :
    System.out.print ("Microsoft Teams");
    break; 
case 'G':
    System.out.print ("Google Meet"); 
default:
    System.out.print("Any Software"); 
    break;
case 'W': 
    System.out.print("Web Ex"); 
    break;
}when x = 'g'Google MeetAny SoftwareGoogle MeetAny SoftwareWeb Ex

Accepted Answer

Any SoftwareReason — Java is a case sensitive language and thus 'G' and 'g' are treated as two different characters. Since the value of x does not match with any case, the default case will be executed. Thus, "Any Software" will be printed.

Question 11

Question 1(xi)Given array int Z[ ] = {15, 16, 17} ; it will occupy ............... bytes in memory.3122464

Accepted Answer

12Reason — int data type occupies 4 bytes in memory. The array Z[] has 3 elements. Thus, the array Z[] will occupy 4 bytes * 3 = 12 bytes in memory.

Question 12

Question 1(xii)In ............... search, the algorithm uses the middle value of the array for the search operation.binarylinearbubbleselection

Accepted Answer

binaryReason — In binary search, the algorithm uses the middle value of the array for the search operation.

Question 13

Question 1(xiii)A single dimensional array contains N elements. What will be the last subscript?NN - 1N - 2N + 1

Accepted Answer

N - 1Reason — The subscripts of an array range from 0 to size - 1. Thus, an array of size N will have the subscripts ranging from 0 to N - 1.

Question 14

Question 1(xiv)Identify the output of the following code :String P = "20", Q = "19";
int a = Integer.parseInt(P); 
int b = Integer.valueOf(Q);
System.out.println(a + "" + b);2019392019

Accepted Answer

2019Reason — In the given code, first strings P and Q are converted to their corresponding integer values. So a becomes 20 and b is 19. In the statement System.out.println(a + "" + b); the expression a + "" performs string concatenation as one of the operands of + operator is a string (empty string ""). As a result, the integer value a is converted to a string. It is then concatenated with variable b to give the output as 2019.

Question 15

Question 1(xv)What will be the output of following code?String c = "Hello i love java"; 
boolean var;
var = c.startsWith("hello"); 
System.out.println(var);truefalse01

Accepted Answer

falseReason — An important point to note in this code is that startsWith() method in Java is case-sensitive, meaning it will differentiate between uppercase and lowercase characters. In this case, the prefix "hello" starts with a lowercase 'h', but the string in c starts with an uppercase 'H'. Since the cases don't match, the startsWith() method will return false. So var will be assigned false and given as output.

Question 16

Question 1(xvi)A string function which removes the	blank spaces provided in the prefix and suffix of a string.String.trim()String.ltrim()String.rtrimString.strim

Accepted Answer

String.trim()Reason — String.trim() function removes the blank spaces provided in the prefix and suffix of a string.

Question 17

Question 1(xvii)Assertion (A) Identifier is a name given to a package, class, interface, method or variable.Reason (R) Identifier allows a programmer to refer to the item from other places in the program.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 because an identifier is indeed a name given to a package, class, interface, method, or variable. Reason (R) is true because identifiers allow a programmer to refer to the item from other places in the program, hence it is the correct explanation of Assertion (A).

Question 18

Question 1(xviii)Read the following text and choose the correct answer:The Java compiler breaks the line of code into text (words) is called Java tokens. These are the smallest element of the Java program. The Java compiler identified these words as tokens. These tokens are separated by the delimiters. Java tokens help the compiler. Which of the following is a type of Java token?IdentifiersKeywordsOperatorsAll of these

Accepted Answer

All of theseReason — Identifiers, keywords and operators are all tokens.

Question 19

Question 1(xix)Assertion (A) next() can read the input only till the space.Reason (R) next() only gets to the line break.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

Assertion (A) is true and Reason (R) is false.Reason — Assertion (A) is true because the next() method reads input until it encounters a space character by default. Reason (R) is false because next() stops reading at the first whitespace character (which includes spaces, tabs, and line breaks), not just at line breaks.

Question 20

Question 1(xx)It can have the same access specifiers used for variables and methods.MethodClassConstructorObject

Accepted Answer

ConstructorReason — A constructor can have the same access specifiers used for variables and methods.

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