Explore topic-wise MCQs in Technical Programming.

This section includes 1671 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.

1551.

Can 8 byte long data type be automatically type cast to 4 byte float data type?

A. True
B. False
Answer» B. False
Discussion
1552.

What is the output of this program? class increment { public static void main(String args[]) { int g = 3; System.out.print(++g * 8); } }

A. 25
B. 24
C. 32
D. 33
Answer» D. 33
Discussion
1553.

What is the output of this program? class Modulus { public static void main(String args[]) { double a = 25.64; int b = 25; a = a % 10; b = b % 10; System.out.println(a + " " + b); } }

A. 5.640000000000001 5
B. 5.640000000000001 5.0
C. 5 5.640000000000001
D. 5 5
Answer» B. 5.640000000000001 5.0
Discussion
1554.

What is the output of this program?

A. 1 1
B. 0 1
C. 1.5 1
D. 1.5 1
Answer» D. 1.5 1
Discussion
1555.

Decrement operator, −−, decreases value of variable by what number?

A. 1
B. 2
C. 3
D. 4
Answer» B. 2
Discussion
1556.

With x = 0, which of the following are legal lines of Java code for changing the value of x to 1? 1. x++; 2. x = x + 1; 3. x += 1; 4. x =+ 1;

A. 1, 2 & 3
B. 1 & 4
C. 1, 2, 3 & 4
D. 3 & 2
Answer» D. 3 & 2
Discussion
1557.

Modulus operator, %, can be applied to which of these?

A. Integers
B. Floating – point numbers
C. Both Integers and floating – point numbers.
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
1558.

Which of the following can be operands of arithmetic operators?

A. Numeric
B. Boolean
C. Characters
D. Both Numeric & Characters
Answer» E.
Discussion
1559.

An array elements are always stored in ________ memory locations?

A. Sequential
B. Random
C. Sequential and Random
D. Binary search
Answer» B. Random
Discussion
1560.

Where is array stored in memory?

A. heap space
B. stack space
C. heap space and stack space
D. first generation memory
Answer» B. stack space
Discussion
1561.

Can you make an array volatile?

A. True
B. False
Answer» B. False
Discussion
1562.

How to copy contents of array?

A. System.arrayCopy()
B. Array.copy()
C. Arrays.copy()
D. Collection.copy()
Answer» B. Array.copy()
Discussion
1563.

How to sort an array?

A. Array.sort()
B. Arrays.sort()
C. Collection.sort()
D. System.sort()
Answer» C. Collection.sort()
Discussion
1564.

Generics does not work with?

A. SetList
B. Tree
C. Tree
D. Array
Answer» E.
Discussion
1565.

What is the output of below snippet? Object[] names = new String[3]; names[0] = new Integer(0);

A. ArrayIndexOutOfBoundsException
B. ArrayStoreException
C. Compilation Error
D. Code runs successfully
Answer» C. Compilation Error
Discussion
1566.

What will this code print? int arr[] = new int [5]; System.out.print(arr);

A. 0
B. value stored in arr[0].
C. 00000
D. Garbage value
Answer» E.
Discussion
1567.

What is the type of variable ‘b’ and ‘d’ in the below snippet? int a[], b; int []c, d;

A. ‘b’ and ‘d’ are int
B. ‘b’ and ‘d’ are arrays of type int
C. ‘b’ is int variable; ‘d’ is int array
D. ‘d’ is int variable; ‘b’ is int array
Answer» D. ‘d’ is int variable; ‘b’ is int array
Discussion
1568.

What is the output of this program? class array_output { public static void main(String args[]) { int array_variable[][] = {{ 1, 2, 3}, { 4 , 5, 6}, { 7, 8, 9}}; int sum = 0; for (int i = 0; i < 3; ++i) for (int j = 0; j < 3 ; ++j) sum = sum + array_variable[i][j]; System.out.print(sum / 5); } }

A. 8
B. 9
C. 10
D. 11
Answer» C. 10
Discussion
1569.

What is the output of this program? 
 
    class array_output 
    {
        public static void main(String args[]) 
        {
            char array_variable [] = new char[10];
	    for (int i = 0; i < 10; ++i) 
            {
                array_variable[i] = 'i';
                System.out.print(array_variable[i] + "");
            }
        } 
    }

A. 1 2 3 4 5 6 7 8 9 10
B. 0 1 2 3 4 5 6 7 8 9 10
C. i j k l m n o p q r
D. i i i i i i i i i i
Answer» E.
Discussion
1570.

What is the output of this program? class evaluate { public static void main(String args[]) { int arr[] = new int[] {0 , 1, 2, 3, 4, 5, 6, 7, 8, 9}; int n = 6; n = arr[arr[n] / 2]; System.out.println(arr[n] / 2); } }

A. 3
B. 0
C. 6
D. 1
Answer» E.
Discussion
1571.

What is the output of this program? class multidimention_array { public static void main(String args[]) { int arr[][] = new int[3][]; arr[0] = new int[1]; arr[1] = new int[2]; arr[2] = new int[3]; int sum = 0; for (int i = 0; i < 3; ++i) for (int j = 0; j < i + 1; ++j) arr[i][j] = j + 1; for (int i = 0; i < 3; ++i) for (int j = 0; j < i + 1; ++j) sum + = arr[i][j]; System.out.print(sum); } }

A. 11
B. 10
C. 13
D. 14
Answer» C. 13
Discussion
1572.

What is the output of this program? class array_output { public static void main(String args[]) { int array_variable [] = new int[10]; for (int i = 0; i < 10; ++i) { array_variable[i] = i; System.out.print(array_variable[i] + " "); i++; } } }

A. 0 2 4 6 8
B. 1 3 5 7 9
C. 0 1 2 3 4 5 6 7 8 9
D. 1 2 3 4 5 6 7 8 9 10
Answer» B. 1 3 5 7 9
Discussion
1573.

Which of these is necessary to specify at time of array initialization?

A. Row
B. Column
C. Both Row and Column
D. None of the mentioned
Answer» B. Column
Discussion
1574.

Which of these is an incorrect Statement?

A. It is necessary to use new operator to initialize an array.
B. Array can be initialized using comma separated expressions surrounded by curly braces.
C. Array can be initialized when they are declared.
D. None of the mentioned
Answer» B. Array can be initialized using comma separated expressions surrounded by curly braces.
Discussion
1575.

What will this code print? int arr[] = new int [5]; System.out.print(arr);

A. 0
B. value stored in arr[0].
C. 00000
D. Class name@ hashcode in hexadecimal form
Answer» E.
Discussion
1576.

Which of these is an incorrect array declaration?

A. int arr[] = new int[5]
B. int [] arr = new int[5]
C. int arr[] = new int[5]
D. int arr[] = int [5] new
Answer» E.
Discussion
1577.

Which of these operators is used to allocate memory to array variable in Java?

A. malloc
B. alloc
C. new
D. new malloc
Answer» D. new malloc
Discussion
1578.

What is the output of this program? class c { public void main( String[] args ) { System.out.println( "Hello" + args[0] ); } }

A. Hello c
B. Hello
C. Hello world
D. Runtime Error
Answer» E.
Discussion
1579.

What is the output of this program, if we run as “java main_arguments 1 2 3”? class main_arguments { public static void main(String [] args) { String [][] argument = new String[2][2]; int x; argument[0] = args; x = argument[0].length; for (int y = 0; y < x; y++) System.out.print(" " + argument[0][y]); } }

A. 1 1
B. 1 0
C. 1 0 3
D. 1 2 3
Answer» E.
Discussion
1580.

What is the output of this program? class A { final public int calculate(int a, int b) { return 1; } } class B extends A { public int calculate(int a, int b) { return 2; } } public class output { public static void main(String args[]) { B object = new B(); System.out.print("b is " + b.calculate(0, 1)); } }

A. b is : 2
B. b is : 1
C. Compilation Error.
D. An exception is thrown at runtime.
Answer» D. An exception is thrown at runtime.
Discussion
1581.

What is the output of this program? class conversion { public static void main(String args[]) { double a = 295.04; int b = 300; byte c = (byte) a; byte d = (byte) b; System.out.println(c + " " + d); } }

A. 38 43
B. 39 44
C. 295 300
D. 295.04 300
Answer» C. 295 300
Discussion
1582.

What is the output of this program? class char_increment { public static void main(String args[]) { char c1 = 'D'; char c2 = 84; c2++; c1++; System.out.println(c1 + " " + c2); } }

A. E U
B. U E
C. V E
D. U F
Answer» B. U E
Discussion
1583.

What is Truncation is Java?

A. Floating-point value assigned to an integer type
B. Integer value assigned to floating type
C. Floating-point value assigned to an Floating type
D. Integer value assigned to floating type
Answer» B. Integer value assigned to floating type
Discussion
1584.

If an expression contains double, int, float, long, then whole expression will promoted into which of these data types?

A. long
B. INT
C. double
D. float
Answer» D. float
Discussion
1585.

What is the error in this code? byte b = 50; b = b * 50;

A. b can not contain value 100, limited by its range.
B. * operator has converted b * 50 into int, which can not be converted to byte without casting.
C. b can not contain value 50.
D. No error in this code
Answer» C. b can not contain value 50.
Discussion
1586.

What is the prototype of the default constructor of this class? public class prototype { }

A. prototype( )
B. prototype(void)
C. public prototype(void)
D. public prototype( )
Answer» E.
Discussion
1587.

Which of these is necessary condition for automatic type conversion in Java?

A. The destination type is smaller than source type
B. The destination type is larger than source type
C. The destination type can be larger or smaller than source type
D. None of the mentioned
Answer» C. The destination type can be larger or smaller than source type
Discussion
1588.

What is the output of this program? class dynamic_initialization { public static void main(String args[]) { double a, b; a = 3.0; b = 4.0; double c = Math.sqrt(a * a + b * b); System.out.println(c); } }

A. 5.0
B. 25.0
C. 7.0
D. Compilation Error
Answer» B. 25.0
Discussion
1589.

Which of these is incorrect string literal?

A. “Hello World”
B. “HelloWorld”
C. “”Hello World””
D. “Hello world”
Answer» E.
Discussion
1590.

What is the output of this program? class variable_scope { public static void main(String args[]) { int x; x = 5; { int y = 6; System.out.print(x + " " + y); } System.out.println(x + " " + y); } }

A. 5 6 5 6
B. 5 6 5
C. Runtime error
D. Compilation error
Answer» E.
Discussion
1591.

What is the output of this program? class array_output { public static void main(String args[]) { int array_variable [] = new int[10]; for (int i = 0; i < 10; ++i) { array_variable[i] = i/2; array_variable[i]++; System.out.print(array_variable[i] + " "); i++; } } }

A. 0 2 4 6 8
B. 1 2 3 4 5
C. 0 1 2 3 4 5 6 7 8 9
D. 1 2 3 4 5 6 7 8 9 10
Answer» C. 0 1 2 3 4 5 6 7 8 9
Discussion
1592.

What is the output of this program? class evaluate { public static void main(String args[]) { int a[] = {1,2,3,4,5}; int d[] = a; int sum = 0; for (int j = 0; j < 3; ++j) sum += (a[j] * d[j + 1]) + (a[j + 1] * d[j]); System.out.println(sum); } }

A. 38
B. 39
C. 40
D. 41
Answer» D. 41
Discussion
1593.

Which of these can not be used for a variable name in Java?

A. identifier
B. keyword
C. identifier & keyword
D. none of the mentioned
Answer» C. identifier & keyword
Discussion
1594.

Literal can be of which of these data types?

A. integer
B. float
C. boolean
D. all of the mentioned
Answer» E.
Discussion
1595.

Literals in java must be appended by which of these?

A. L
B. I
C. D
D. L AND I
Answer» E.
Discussion
1596.

Which of these can be returned by the operator & ?

A. Integer
B. Boolean
C. Character
D. Integer or Boolean
Answer» E.
Discussion
1597.

Which of these is long data type literal?

A. 0x99fffL
B. ABCDEFG
C. 0x99fffa
D. 99671246
Answer» B. ABCDEFG
Discussion
1598.

How to get UTC time?

A. Time.getUTC();
B. Date.getUTC();
C. Instant.now();
D. TimeZone.getUTC();
Answer» D. TimeZone.getUTC();
Discussion
1599.

What does LocalTime represent?

A. long diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
B. long diffInMilli = java.time.difference(dateTime1, dateTime2).toMillis();
C. Date diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
D. Time diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
Answer» B. long diffInMilli = java.time.difference(dateTime1, dateTime2).toMillis();
Discussion
1600.

How is Date stored in database?

A. java.sql.Date
B. java.util.Date
C. Java.sql.DateTime
D. java.util.DateTime
Answer» B. java.util.Date
Discussion